@comment abort
@item void abort (void)
@file{stdlib.h} (ANSI):  @ref{Aborting a Program}.
@comment abs
@item int abs (int @var{number})
@file{stdlib.h} (ANSI):  @ref{Absolute Value}.
@comment accept
@item int accept (int @var{socket}, struct sockaddr *@var{addr}, size_t *@var{length_ptr})
@file{sys/socket.h} (BSD):  @ref{Accepting Connections}.
@comment access
@item int access (const char *@var{filename}, int @var{how})
@file{unistd.h} (POSIX.1):  @ref{Testing File Access}.
@comment acosh
@item double acosh (double @var{x})
@file{math.h} (BSD):  @ref{Hyperbolic Functions}.
@comment acos
@item double acos (double @var{x})
@file{math.h} (ANSI):  @ref{Inverse Trig Functions}.
@comment adjtime
@item int adjtime (const struct timeval *@var{delta}, struct timeval *@var{olddelta})
@file{sys/time.h} (BSD):  @ref{High-Resolution Calendar}.
@comment AF_FILE
@item AF_FILE
@file{sys/socket.h} (GNU):  @ref{Address Formats}.
@comment AF_INET
@item AF_INET
@file{sys/socket.h} (BSD):  @ref{Address Formats}.
@comment AF_UNIX
@item AF_UNIX
@file{sys/socket.h} (BSD):  @ref{Address Formats}.
@comment AF_UNSPEC
@item AF_UNSPEC
@file{sys/socket.h} (BSD):  @ref{Address Formats}.
@comment alarm
@item unsigned int alarm (unsigned int @var{seconds})
@file{unistd.h} (POSIX.1):  @ref{Setting an Alarm}.
@comment alloca
@item void * alloca (size_t @var{size});
@file{stdlib.h} (GNU, BSD):  @ref{Variable Size Automatic}.
@comment ALTWERASE
@item ALTWERASE
@file{termios.h} (BSD):  @ref{Local Modes}.
@comment ARG_MAX
@item int ARG_MAX
@file{limits.h} (POSIX.1):  @ref{General Limits}.
@comment asctime
@item char * asctime (const struct tm *@var{brokentime})
@file{time.h} (ANSI):  @ref{Formatting Date and Time}.
@comment asinh
@item double asinh (double @var{x})
@file{math.h} (BSD):  @ref{Hyperbolic Functions}.
@comment asin
@item double asin (double @var{x})
@file{math.h} (ANSI):  @ref{Inverse Trig Functions}.
@comment asprintf
@item int asprintf (char **@var{ptr}, const char *@var{template}, @dots{})
@file{stdio.h} (GNU):  @ref{Dynamic Output}.
@comment assert
@item void assert (int @var{expression})
@file{assert.h} (ANSI):  @ref{Consistency Checking}.
@comment atan2
@item double atan2 (double @var{y}, double @var{x})
@file{math.h} (ANSI):  @ref{Inverse Trig Functions}.
@comment atanh
@item double atanh (double @var{x})
@file{math.h} (BSD):  @ref{Hyperbolic Functions}.
@comment atan
@item double atan (double @var{x})
@file{math.h} (ANSI):  @ref{Inverse Trig Functions}.
@comment atexit
@item int atexit (void (*@var{function}) (void))
@file{stdlib.h} (ANSI):  @ref{Cleanups on Exit}.
@comment atof
@item double atof (const char *@var{string})
@file{stdlib.h} (ANSI):  @ref{Parsing of Floats}.
@comment atoi
@item int atoi (const char *@var{string})
@file{stdlib.h} (ANSI):  @ref{Parsing of Integers}.
@comment atol
@item long int atol (const char *@var{string})
@file{stdlib.h} (ANSI):  @ref{Parsing of Integers}.
@comment B0
@item B0
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B110
@item B110
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B1200
@item B1200
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B134
@item B134
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B150
@item B150
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B1800
@item B1800
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B19200
@item B19200
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B200
@item B200
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B2400
@item B2400
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B300
@item B300
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B38400
@item B38400
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B4800
@item B4800
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B50
@item B50
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B600
@item B600
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B75
@item B75
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment B9600
@item B9600
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment BC_BASE_MAX
@item int BC_BASE_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Limits}.
@comment BC_DIM_MAX
@item int BC_DIM_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Limits}.
@comment BC_DIM_MAX
@item int BC_DIM_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Limits}.
@comment bcmp
@item int bcmp (const void *@var{a1}, const void *@var{a2}, size_t @var{size})
@file{string.h} (BSD):  @ref{String/Array Comparison,}.
@comment bcopy
@item void * bcopy (void *@var{from}, const void *@var{to}, size_t @var{size})
@file{string.h} (BSD):  @ref{Copying and Concatenation,}.
@comment BC_SCALE_MAX
@item int BC_SCALE_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Limits}.
@comment BC_STRING_MAX
@item int BC_STRING_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Limits}.
@comment bind
@item int bind (int @var{socket}, struct sockaddr *@var{addr}, size_t @var{length})
@file{sys/socket.h} (BSD):  @ref{Setting Address}.
@comment BRKINT
@item BRKINT
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment _BSD_SOURCE
@item _BSD_SOURCE
(GNU):  @ref{Feature Test Macros,}.
@comment bsearch
@item void * bsearch (const void *@var{key}, const void *@var{array}, size_t @var{count}, size_t @var{size}, comparison_fn_t @var{compare})
@file{stdlib.h} (ANSI):  @ref{Array Search Function,}.
@comment BUFSIZ
@item int BUFSIZ
@file{stdio.h} (ANSI):  @ref{Controlling Buffering}.
@comment bzero
@item void * bzero (void *@var{block}, size_t @var{size})
@file{string.h} (BSD):  @ref{Copying and Concatenation,}.
@comment cabs
@item double cabs (struct @{ double real, imag; @} @var{z})
@file{math.h} (BSD):  @ref{Absolute Value}.
@comment calloc
@item void * calloc (size_t @var{count}, size_t @var{eltsize})
@file{malloc.h}, @file{stdlib.h} (ANSI):  @ref{Allocating Cleared Space}.
@comment cbrt
@item double cbrt (double @var{x})
@file{math.h} (BSD):  @ref{Exponents and Logarithms}.
@comment cc_t
@item cc_t
@file{termios.h} (POSIX.1):  @ref{Mode Data Types}.
@comment CCTS_OFLOW
@item CCTS_OFLOW
@file{termios.h} (BSD):  @ref{Control Modes}.
@comment ceil
@item double ceil (double @var{x})
@file{math.h} (ANSI):  @ref{Rounding and Remainders}.
@comment cfgetispeed
@item speed_t cfgetispeed (const struct termios *@var{termios_p})
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment cfgetospeed
@item speed_t cfgetospeed (const struct termios *@var{termios_p})
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment cfmakeraw
@item int cfmakeraw (struct termios *@var{termios_p})
@file{termios.h} (BSD):  @ref{Line Speed}.
@comment cfree
@item void cfree (void *@var{ptr})
@file{stdlib.h} (Sun):  @ref{Freeing after Malloc}.
@comment cfsetispeed
@item int cfsetispeed (struct termios *@var{termios_p}, speed_t @var{speed})
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment cfsetospeed
@item int cfsetospeed (struct termios *@var{termios_p}, speed_t @var{speed})
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment cfsetspeed
@item int cfsetspeed (struct termios *@var{termios_p}, speed_t @var{speed})
@file{termios.h} (BSD):  @ref{Line Speed}.
@comment CHAR_BIT
@item CHAR_BIT
@file{limits.h} (ANSI):  @ref{Width of Type}.
@comment CHAR_MAX
@item CHAR_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment CHAR_MIN
@item CHAR_MIN
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment chdir
@item int chdir (const char *@var{filename})
@file{unistd.h} (POSIX.1):  @ref{Working Directory}.
@comment CHILD_MAX
@item int CHILD_MAX
@file{limits.h} (POSIX.1):  @ref{General Limits}.
@comment chmod
@item int chmod (const char *@var{filename}, mode_t @var{mode})
@file{sys/stat.h} (POSIX.1):  @ref{Setting Permissions}.
@comment chown
@item int chown (const char *@var{filename}, uid_t @var{owner}, gid_t @var{group})
@file{unistd.h} (POSIX.1):  @ref{File Owner}.
@comment clearerr
@item void clearerr (FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{EOF and Errors}.
@comment CLK_TCK
@item int CLK_TCK
@file{time.h} (POSIX.1):  @ref{Basic CPU Time}.
@comment CLOCAL
@item CLOCAL
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment clock
@item clock_t clock (void)
@file{time.h} (ANSI):  @ref{Basic CPU Time}.
@comment CLOCKS_PER_SEC
@item int CLOCKS_PER_SEC
@file{time.h} (ANSI):  @ref{Basic CPU Time}.
@comment clock_t
@item clock_t
@file{time.h} (ANSI):  @ref{Basic CPU Time}.
@comment closedir
@item int closedir (DIR *@var{dirstream})
@file{dirent.h} (POSIX.1):  @ref{Reading/Closing Directory}.
@comment close
@item int close (int @var{filedes})
@file{unistd.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment COLL_WEIGHTS_MAX
@item int COLL_WEIGHTS_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Limits}.
@comment confstr
@item size_t confstr (int @var{parameter}, char *@var{buf}, size_t @var{len})
@file{unistd.h} (POSIX.2):  @ref{String Parameters}.
@comment connect
@item int connect (int @var{socket}, struct sockaddr *@var{addr}, size_t @var{length})
@file{sys/socket.h} (BSD):  @ref{Connecting}.
@comment cookie_close_function
@item cookie_close_function
@file{stdio.h} (GNU):  @ref{Hook Functions}.
@comment cookie_io_functions_t
@item cookie_io_functions_t
@file{stdio.h} (GNU):  @ref{Streams and Cookies}.
@comment cookie_read_function
@item cookie_read_function
@file{stdio.h} (GNU):  @ref{Hook Functions}.
@comment cookie_seek_function
@item cookie_seek_function
@file{stdio.h} (GNU):  @ref{Hook Functions}.
@comment cookie_write_function
@item cookie_write_function
@file{stdio.h} (GNU):  @ref{Hook Functions}.
@comment copysign
@item double copysign (double @var{value}, double @var{sign})
@file{math.h} (BSD):  @ref{Normalization Functions}.
@comment cosh
@item double cosh (double @var{x})
@file{math.h} (ANSI):  @ref{Hyperbolic Functions}.
@comment cos
@item double cos (double @var{x})
@file{math.h} (ANSI):  @ref{Trig Functions}.
@comment CREAD
@item CREAD
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment creat
@item int creat (const char *@var{filename}, mode_t @var{mode})
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment CRTS_IFLOW
@item CRTS_IFLOW
@file{termios.h} (BSD):  @ref{Control Modes}.
@comment CS5
@item CS5
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment CS6
@item CS6
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment CS7
@item CS7
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment CS8
@item CS8
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment CSIZE
@item CSIZE
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment _CS_PATH
@item _CS_PATH
@file{unistd.h} (POSIX.2):  @ref{String Parameters}.
@comment CSTOPB
@item CSTOPB
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment ctermid
@item char * ctermid (char *@var{string})
@file{stdio.h} (POSIX.1):  @ref{Identifying the Terminal,}.
@comment ctime
@item char * ctime (const time_t *@var{time})
@file{time.h} (ANSI):  @ref{Formatting Date and Time}.
@comment cuserid
@item char * cuserid (char *@var{string})
@file{stdio.h} (POSIX.1):  @ref{Who Logged In}.
@comment daylight
@item int daylight
@file{time.h} (SVID):  @ref{Time Zone Functions}.
@comment DBL_DIG
@item DBL_DIG
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment DBL_EPSILON
@item DBL_EPSILON
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment DBL_MANT_DIG
@item DBL_MANT_DIG
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment DBL_MAX_10_EXP
@item DBL_MAX_10_EXP
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment DBL_MAX_EXP
@item DBL_MAX_EXP
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment DBL_MAX
@item DBL_MAX
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment DBL_MIN_10_EXP
@item DBL_MIN_10_EXP
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment DBL_MIN_EXP
@item DBL_MIN_EXP
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment DBL_MIN
@item DBL_MIN
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment dev_t
@item dev_t
@file{sys/types.h} (POSIX.1):  @ref{Attribute Meanings}.
@comment difftime
@item double difftime (time_t @var{time1}, time_t @var{time0})
@file{time.h} (ANSI):  @ref{Simple Calendar Time}.
@comment DIR
@item DIR
@file{dirent.h} (POSIX.1):  @ref{Opening a Directory}.
@comment div
@item div_t div (int @var{numerator}, int @var{denominator})
@file{stdlib.h} (ANSI):  @ref{Integer Division}.
@comment div_t
@item div_t
@file{stdlib.h} (ANSI):  @ref{Integer Division}.
@c DO NOT EDIT THIS FILE!
@comment drem
@item double drem (double @var{numerator}, double @var{denominator})
@file{math.h} (BSD):  @ref{Rounding and Remainders}.
@comment dup2
@item int dup2 (int @var{old}, int @var{new})
@file{unistd.h} (POSIX.1):  @ref{Duplicating Descriptors}.
@comment dup
@item int dup (int @var{old})
@file{unistd.h} (POSIX.1):  @ref{Duplicating Descriptors}.
@comment E2BIG
@item int E2BIG
@file{errno.h} (POSIX.1: Argument list too long):  @ref{Error Codes,}.
@comment EACCES
@item int EACCES
@file{errno.h} (POSIX.1: Permission denied):  @ref{Error Codes,}.
@comment EADDRINUSE
@item int EADDRINUSE
@file{errno.h} (BSD: Address already in use):  @ref{Error Codes,}.
@comment EADDRNOTAVAIL
@item int EADDRNOTAVAIL
@file{errno.h} (BSD: Can't assign requested address):  @ref{Error Codes,}.
@comment EAFNOSUPPORT
@item int EAFNOSUPPORT
@file{errno.h} (BSD: Address family not supported by protocol family):  @ref{Error Codes,}.
@comment EAGAIN
@item int EAGAIN
@file{errno.h} (POSIX.1: Resource temporarily unavailable):  @ref{Error Codes,}.
@comment EALREADY
@item int EALREADY
@file{errno.h} (BSD: Operation already in progress):  @ref{Error Codes,}.
@comment EBACKGROUND
@item int EBACKGROUND
@file{errno.h} (GNU: Inappropriate operation for background process):  @ref{Error Codes,}.
@comment EBADF
@item int EBADF
@file{errno.h} (POSIX.1: Bad file descriptor):  @ref{Error Codes,}.
@comment EBUSY
@item int EBUSY
@file{errno.h} (POSIX.1: Device busy):  @ref{Error Codes,}.
@comment ECHILD
@item int ECHILD
@file{errno.h} (POSIX.1: No child processes):  @ref{Error Codes,}.
@comment ECHOCTL
@item ECHOCTL
@file{termios.h} (BSD):  @ref{Local Modes}.
@comment ECHOE
@item ECHOE
@file{termios.h} (POSIX.1):  @ref{Local Modes}.
@comment ECHO
@item ECHO
@file{termios.h} (POSIX.1):  @ref{Local Modes}.
@comment ECHOKE
@item ECHOKE
@file{termios.h} (BSD):  @ref{Local Modes}.
@comment ECHOK
@item ECHOK
@file{termios.h} (POSIX.1):  @ref{Local Modes}.
@comment ECHONL
@item ECHONL
@file{termios.h} (POSIX.1):  @ref{Local Modes}.
@comment ECHOPRT
@item ECHOPRT
@file{termios.h} (BSD):  @ref{Local Modes}.
@comment ECONNABORTED
@item int ECONNABORTED
@file{errno.h} (BSD: Software caused connection abort):  @ref{Error Codes,}.
@comment ECONNREFUSED
@item int ECONNREFUSED
@file{errno.h} (BSD: Connection refused):  @ref{Error Codes,}.
@comment ECONNRESET
@item int ECONNRESET
@file{errno.h} (BSD: Connection reset by peer):  @ref{Error Codes,}.
@comment EDEADLK
@item int EDEADLK
@file{errno.h} (POSIX.1: Resource deadlock avoided):  @ref{Error Codes,}.
@comment EDESTADDRREQ
@item int EDESTADDRREQ
@file{errno.h} (BSD: Destination address required):  @ref{Error Codes,}.
@comment ED
@item int ED
@file{errno.h} (GNU: ?):  @ref{Error Codes,}.
@comment EDOM
@item int EDOM
@file{errno.h} (ANSI: Numerical argument out of domain):  @ref{Error Codes,}.
@comment EDQUOT
@item int EDQUOT
@file{errno.h} (BSD: Disc quota exceeded):  @ref{Error Codes,}.
@comment EEXIST
@item int EEXIST
@file{errno.h} (POSIX.1: File exists):  @ref{Error Codes,}.
@comment EFAULT
@item int EFAULT
@file{errno.h} (POSIX.1: Bad address):  @ref{Error Codes,}.
@comment EFBIG
@item int EFBIG
@file{errno.h} (POSIX.1: File too large):  @ref{Error Codes,}.
@comment EGRATUITOUS
@item int EGRATUITOUS
@file{errno.h} (GNU: Gratuitous error):  @ref{Error Codes,}.
@comment EGREGIOUS
@item int EGREGIOUS
@file{errno.h} (GNU: You really blew it this time):  @ref{Error Codes,}.
@comment EHOSTDOWN
@item int EHOSTDOWN
@file{errno.h} (BSD: Host is down):  @ref{Error Codes,}.
@comment EHOSTUNREACH
@item int EHOSTUNREACH
@file{errno.h} (BSD: No route to host):  @ref{Error Codes,}.
@comment EIEIO
@item int EIEIO
@file{errno.h} (GNU: Computer bought the farm):  @ref{Error Codes,}.
@comment EINPROGRESS
@item int EINPROGRESS
@file{errno.h} (BSD: Operation now in progress):  @ref{Error Codes,}.
@comment EINTR
@item int EINTR
@file{errno.h} (POSIX.1: Interrupted system call):  @ref{Error Codes,}.
@comment EINVAL
@item int EINVAL
@file{errno.h} (POSIX.1: Invalid argument):  @ref{Error Codes,}.
@comment EIO
@item int EIO
@file{errno.h} (POSIX.1: Input/output error):  @ref{Error Codes,}.
@comment EISCONN
@item int EISCONN
@file{errno.h} (BSD: Socket is already connected):  @ref{Error Codes,}.
@comment EISDIR
@item int EISDIR
@file{errno.h} (POSIX.1: Is a directory):  @ref{Error Codes,}.
@comment ELOOP
@item int ELOOP
@file{errno.h} (BSD: Too many levels of symbolic links):  @ref{Error Codes,}.
@comment EMFILE
@item int EMFILE
@file{errno.h} (POSIX.1: Too many open files):  @ref{Error Codes,}.
@comment EMLINK
@item int EMLINK
@file{errno.h} (POSIX.1: Too many links):  @ref{Error Codes,}.
@comment EMSGSIZE
@item int EMSGSIZE
@file{errno.h} (BSD: Message too long):  @ref{Error Codes,}.
@comment ENAMETOOLONG
@item int ENAMETOOLONG
@file{errno.h} (POSIX.1: File name too long):  @ref{Error Codes,}.
@comment endgrent
@item void endgrent (void)
@file{grp.h} (SVID, BSD):  @ref{Scanning All Groups}.
@comment endhostent
@item void endhostent ()
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment endnetent
@item void endnetent (void)
@file{netdb.h} (BSD):  @ref{Networks Database}.
@comment endprotoent
@item void endprotoent (void)
@file{netdb.h} (BSD):  @ref{Protocols Database}.
@comment endpwent
@item void endpwent (void)
@file{pwd.h} (SVID, BSD):  @ref{Scanning All Users}.
@comment endservent
@item void endservent (void)
@file{netdb.h} (BSD):  @ref{Services Database}.
@comment ENETDOWN
@item int ENETDOWN
@file{errno.h} (BSD: Network is down):  @ref{Error Codes,}.
@comment ENETRESET
@item int ENETRESET
@file{errno.h} (BSD: Network dropped connection on reset):  @ref{Error Codes,}.
@comment ENETUNREACH
@item int ENETUNREACH
@file{errno.h} (BSD: Network is unreachable):  @ref{Error Codes,}.
@comment ENFILE
@item int ENFILE
@file{errno.h} (POSIX.1: Too many open files in system):  @ref{Error Codes,}.
@comment ENOBUFS
@item int ENOBUFS
@file{errno.h} (BSD: No buffer space available):  @ref{Error Codes,}.
@comment ENODEV
@item int ENODEV
@file{errno.h} (POSIX.1: Operation not supported by device):  @ref{Error Codes,}.
@comment ENOENT
@item int ENOENT
@file{errno.h} (POSIX.1: No such file or directory):  @ref{Error Codes,}.
@comment ENOEXEC
@item int ENOEXEC
@file{errno.h} (POSIX.1: Exec format error):  @ref{Error Codes,}.
@comment ENOLCK
@item int ENOLCK
@file{errno.h} (POSIX.1: No locks available):  @ref{Error Codes,}.
@comment ENOMEM
@item int ENOMEM
@file{errno.h} (POSIX.1: Cannot allocate memory):  @ref{Error Codes,}.
@comment ENOPROTOOPT
@item int ENOPROTOOPT
@file{errno.h} (BSD: Protocol not available):  @ref{Error Codes,}.
@comment ENOSPC
@item int ENOSPC
@file{errno.h} (POSIX.1: No space left on device):  @ref{Error Codes,}.
@comment ENOSYS
@item int ENOSYS
@file{errno.h} (POSIX.1: Function not implemented):  @ref{Error Codes,}.
@comment ENOTBLK
@item int ENOTBLK
@file{errno.h} (BSD: Block device required):  @ref{Error Codes,}.
@comment ENOTCONN
@item int ENOTCONN
@file{errno.h} (BSD: Socket is not connected):  @ref{Error Codes,}.
@comment ENOTDIR
@item int ENOTDIR
@file{errno.h} (POSIX.1: Not a directory):  @ref{Error Codes,}.
@comment ENOTEMPTY
@item int ENOTEMPTY
@file{errno.h} (POSIX.1: Directory not empty):  @ref{Error Codes,}.
@comment ENOTSOCK
@item int ENOTSOCK
@file{errno.h} (BSD: Socket operation on non-socket):  @ref{Error Codes,}.
@comment ENOTTY
@item int ENOTTY
@file{errno.h} (POSIX.1: Inappropriate ioctl for device):  @ref{Error Codes,}.
@comment environ
@item char ** environ
@file{unistd.h} (POSIX.1):  @ref{Environment Access}.
@comment ENXIO
@item int ENXIO
@file{errno.h} (POSIX.1: Device not configured):  @ref{Error Codes,}.
@comment EOF
@item int EOF
@file{stdio.h} (ANSI):  @ref{EOF and Errors}.
@comment EOPNOTSUPP
@item int EOPNOTSUPP
@file{errno.h} (BSD: Operation not supported):  @ref{Error Codes,}.
@comment EPERM
@item int EPERM
@file{errno.h} (POSIX.1: Operation not permitted):  @ref{Error Codes,}.
@comment EPFNOSUPPORT
@item int EPFNOSUPPORT
@file{errno.h} (BSD: Protocol family not supported):  @ref{Error Codes,}.
@comment EPIPE
@item int EPIPE
@file{errno.h} (POSIX.1: Broken pipe):  @ref{Error Codes,}.
@comment EPROTONOSUPPORT
@item int EPROTONOSUPPORT
@file{errno.h} (BSD: Protocol not supported):  @ref{Error Codes,}.
@comment EPROTOTYPE
@item int EPROTOTYPE
@file{errno.h} (BSD: Protocol wrong type for socket):  @ref{Error Codes,}.
@comment EQUIV_CLASS_MAX
@item int EQUIV_CLASS_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Limits}.
@comment ERANGE
@item int ERANGE
@file{errno.h} (ANSI: Numerical result out of range):  @ref{Error Codes,}.
@comment EREMOTE
@item int EREMOTE
@file{errno.h} (BSD: Too many levels of remote in path):  @ref{Error Codes,}.
@comment EROFS
@item int EROFS
@file{errno.h} (POSIX.1: Read-only file system):  @ref{Error Codes,}.
@comment errno
@item volatile int errno
@file{errno.h} (ANSI):  @ref{Checking for Errors,}.
@comment ESHUTDOWN
@item int ESHUTDOWN
@file{errno.h} (BSD: Can't send after socket shutdown):  @ref{Error Codes,}.
@comment ESOCKTNOSUPPORT
@item int ESOCKTNOSUPPORT
@file{errno.h} (BSD: Socket type not supported):  @ref{Error Codes,}.
@comment ESPIPE
@item int ESPIPE
@file{errno.h} (POSIX.1: Illegal seek):  @ref{Error Codes,}.
@comment ESRCH
@item int ESRCH
@file{errno.h} (POSIX.1: No such process):  @ref{Error Codes,}.
@comment ESTALE
@item int ESTALE
@file{errno.h} (BSD: Stale NFS file handle):  @ref{Error Codes,}.
@comment ETIMEDOUT
@item int ETIMEDOUT
@file{errno.h} (BSD: Connection timed out):  @ref{Error Codes,}.
@comment ETXTBSY
@item int ETXTBSY
@file{errno.h} (BSD: Text file busy):  @ref{Error Codes,}.
@comment EUSERS
@item int EUSERS
@file{errno.h} (BSD: Too many users):  @ref{Error Codes,}.
@comment EWOULDBLOCK
@item int EWOULDBLOCK
@file{errno.h} (BSD: Operation would block):  @ref{Error Codes,}.
@comment EXDEV
@item int EXDEV
@file{errno.h} (POSIX.1: Invalid cross-device link):  @ref{Error Codes,}.
@comment execle
@item int execle (const char *@var{filename}, const char *@var{arg0}, char *const @var{env}@t{[]}, @dots{})
@file{unistd.h} (POSIX.1):  @ref{Executing a File}.
@comment execl
@item int execl (const char *@var{filename}, const char *@var{arg0}, @dots{})
@file{unistd.h} (POSIX.1):  @ref{Executing a File}.
@comment execlp
@item int execlp (const char *@var{filename}, const char *@var{arg0}, @dots{})
@file{unistd.h} (POSIX.1):  @ref{Executing a File}.
@comment execve
@item int execve (const char *@var{filename}, char *const @var{argv}@t{[]}, char *const @var{env}@t{[]})
@file{unistd.h} (POSIX.1):  @ref{Executing a File}.
@comment execv
@item int execv (const char *@var{filename}, char *const @var{argv}@t{[]})
@file{unistd.h} (POSIX.1):  @ref{Executing a File}.
@comment execvp
@item int execvp (const char *@var{filename}, char *const @var{argv}@t{[]})
@file{unistd.h} (POSIX.1):  @ref{Executing a File}.
@comment EXIT_FAILURE
@item int EXIT_FAILURE
@file{stdlib.h} (ANSI):  @ref{Exit Status}.
@comment exit
@item void exit (int @var{status})
@file{stdlib.h} (ANSI):  @ref{Normal Termination}.
@comment _exit
@item void _exit (int @var{status})
@file{unistd.h} (POSIX.1):  @ref{Termination Internals}.
@comment EXIT_SUCCESS
@item int EXIT_SUCCESS
@file{stdlib.h} (ANSI):  @ref{Exit Status}.
@comment exp
@item double exp (double @var{x})
@file{math.h} (ANSI):  @ref{Exponents and Logarithms}.
@comment expm1
@item double expm1 (double @var{x})
@file{math.h} (BSD):  @ref{Exponents and Logarithms}.
@comment EXPR_NEST_MAX
@item int EXPR_NEST_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Limits}.
@comment fabs
@item double fabs (double @var{number})
@file{math.h} (ANSI):  @ref{Absolute Value}.
@comment fchmod
@item int fchmod (int @var{filedes}, int @var{mode})
@file{sys/stat.h} (BSD):  @ref{Setting Permissions}.
@comment fchown
@item int fchown (int @var{filedes}, int @var{owner}, int @var{group})
@file{unistd.h} (BSD):  @ref{File Owner}.
@comment fclean
@item int fclean (FILE *@var{stream})
@file{stdio.h} (GNU):  @ref{Cleaning Streams}.
@comment fclose
@item int fclose (FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Closing Streams}.
@comment fcntl
@item int fcntl (int @var{filedes}, int @var{command}, @dots{})
@file{fcntl.h} (POSIX.1):  @ref{Control Operations}.
@comment FD_CLOEXEC
@item int FD_CLOEXEC
@file{fcntl.h} (POSIX.1):  @ref{Descriptor Flags}.
@comment FD_CLR
@item void FD_CLR (int @var{filedes}, fd_set *@var{set})
@file{sys/types.h} (BSD):  @ref{Waiting for I/O}.
@comment FD_ISSET
@item int FD_ISSET (int @var{filedes}, fd_set *@var{set})
@file{sys/types.h} (BSD):  @ref{Waiting for I/O}.
@comment fdopen
@item FILE * fdopen (int @var{filedes}, const char *@var{opentype})
@file{stdio.h} (POSIX.1):  @ref{Descriptors and Streams}.
@comment FD_SET
@item void FD_SET (int @var{filedes}, fd_set *@var{set})
@file{sys/types.h} (BSD):  @ref{Waiting for I/O}.
@comment fd_set
@item fd_set
@file{sys/types.h} (BSD):  @ref{Waiting for I/O}.
@comment FD_SETSIZE
@item int FD_SETSIZE
@file{sys/types.h} (BSD):  @ref{Waiting for I/O}.
@comment F_DUPFD
@item int F_DUPFD
@file{fcntl.h} (POSIX.1):  @ref{Duplicating Descriptors}.
@comment FD_ZERO
@item void FD_ZERO (fd_set *@var{set})
@file{sys/types.h} (BSD):  @ref{Waiting for I/O}.
@comment feof
@item int feof (FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{EOF and Errors}.
@comment ferror
@item int ferror (FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{EOF and Errors}.
@comment fflush
@item int fflush (FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Flushing Buffers}.
@comment fgetc
@item int fgetc (FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Character Input}.
@comment F_GETFD
@item int F_GETFD
@file{fcntl.h} (POSIX.1):  @ref{Descriptor Flags}.
@comment F_GETFL
@item int F_GETFL
@file{fcntl.h} (POSIX.1):  @ref{File Status Flags}.
@comment fgetgrent
@item struct group * fgetgrent (FILE *@var{stream})
@file{grp.h} (SVID):  @ref{Scanning All Groups}.
@comment F_GETLK
@item int F_GETLK
@file{fcntl.h} (POSIX.1):  @ref{File Locks}.
@comment F_GETOWN
@item int F_GETOWN
@file{fcntl.h} (BSD):  @ref{Interrupt Input}.
@comment fgetpos
@item int fgetpos (FILE *@var{stream}, fpos_t *@var{position})
@file{stdio.h} (ANSI):  @ref{Portable Positioning}.
@comment fgetpwent
@item struct passwd * fgetpwent (FILE *@var{stream})
@file{pwd.h} (SVID):  @ref{Scanning All Users}.
@comment fgets
@item char * fgets (char *@var{s}, int @var{count}, FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Line Input}.
@comment FILE
@item FILE
@file{stdio.h} (ANSI):  @ref{Streams}.
@comment FILENAME_MAX
@item int FILENAME_MAX
@file{stdio.h} (ANSI):  @ref{Limits for Files}.
@comment fileno
@item int fileno (FILE *@var{stream})
@file{stdio.h} (POSIX.1):  @ref{Descriptors and Streams}.
@comment finite
@item int finite (double @var{x})
@file{math.h} (BSD):  @ref{Predicates on Floats}.
@comment floor
@item double floor (double @var{x})
@file{math.h} (ANSI):  @ref{Rounding and Remainders}.
@comment FLT_DIG
@item FLT_DIG
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_EPSILON
@item FLT_EPSILON
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_MANT_DIG
@item FLT_MANT_DIG
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_MAX_10_EXP
@item FLT_MAX_10_EXP
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_MAX_EXP
@item FLT_MAX_EXP
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_MAX
@item FLT_MAX
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_MIN_10_EXP
@item FLT_MIN_10_EXP
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_MIN_EXP
@item FLT_MIN_EXP
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_MIN
@item FLT_MIN
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_RADIX
@item FLT_RADIX
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLT_ROUNDS
@item FLT_ROUNDS
@file{float.h} (ANSI):  @ref{Floating Point Parameters}.
@comment FLUSHO
@item FLUSHO
@file{termios.h} (BSD):  @ref{Local Modes}.
@comment fmemopen
@item FILE * fmemopen (void *@var{buf}, size_t @var{size}, const char *@var{opentype})
@file{stdio.h} (GNU):  @ref{String Streams}.
@comment fmod
@item double fmod (double @var{numerator}, double @var{denominator})
@file{math.h} (ANSI):  @ref{Rounding and Remainders}.
@comment fnmatch
@item int fnmatch (const char *@var{pattern}, const char *@var{string}, int @var{flags})
@file{fnmatch.h} (POSIX.2):  @ref{Wildcard Matching}.
@comment FNM_CASEFOLD
@item FNM_CASEFOLD
@file{fnmatch.h} (GNU):  @ref{Wildcard Matching}.
@comment FNM_FILE_NAME
@item FNM_FILE_NAME
@file{fnmatch.h} (GNU):  @ref{Wildcard Matching}.
@comment FNM_LEADING_DIR
@item FNM_LEADING_DIR
@file{fnmatch.h} (GNU):  @ref{Wildcard Matching}.
@comment FNM_NOESCAPE
@item FNM_NOESCAPE
@file{fnmatch.h} (POSIX.2):  @ref{Wildcard Matching}.
@comment FNM_PATHNAME
@item FNM_PATHNAME
@file{fnmatch.h} (POSIX.2):  @ref{Wildcard Matching}.
@comment FNM_PERIOD
@item FNM_PERIOD
@file{fnmatch.h} (POSIX.2):  @ref{Wildcard Matching}.
@comment F_OK
@item int F_OK
@file{unistd.h} (POSIX.1):  @ref{Testing File Access}.
@comment fopencookie
@item FILE * fopencookie (void *@var{cookie}, const char *@var{opentype}, cookie_io_functions_t @var{io_functions})
@file{stdio.h} (GNU):  @ref{Streams and Cookies}.
@comment fopen
@item FILE * fopen (const char *@var{filename}, const char *@var{opentype})
@file{stdio.h} (ANSI):  @ref{Opening Streams}.
@comment FOPEN_MAX
@item int FOPEN_MAX
@file{stdio.h} (ANSI):  @ref{Opening Streams}.
@comment fork
@item pid_t fork (void)
@file{unistd.h} (POSIX.1):  @ref{Creating a Process}.
@comment fpathconf
@item long int fpathconf (int @var{filedes}, int @var{parameter})
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment FPE_DECOVF_TRAP
@item FPE_DECOVF_TRAP
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment FPE_FLTDIV_FAULT
@item FPE_FLTDIV_FAULT
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment FPE_FLTDIV_TRAP
@item FPE_FLTDIV_TRAP
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment FPE_FLTOVF_FAULT
@item FPE_FLTOVF_FAULT
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment FPE_FLTOVF_TRAP
@item FPE_FLTOVF_TRAP
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment FPE_FLTUND_FAULT
@item FPE_FLTUND_FAULT
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment FPE_FLTUND_TRAP
@item FPE_FLTUND_TRAP
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment FPE_INTDIV_TRAP
@item FPE_INTDIV_TRAP
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment FPE_INTOVF_TRAP
@item FPE_INTOVF_TRAP
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment FPE_SUBRNG_TRAP
@item FPE_SUBRNG_TRAP
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment fpos_t
@item fpos_t
@file{stdio.h} (ANSI):  @ref{Portable Positioning}.
@comment fprintf
@item int fprintf (FILE *@var{stream}, const char *@var{template}, @dots{})
@file{stdio.h} (ANSI):  @ref{Formatted Output Functions}.
@comment fputc
@item int fputc (int @var{c}, FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Simple Output}.
@comment fputs
@item int fputs (const char *@var{s}, FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Simple Output}.
@comment F_RDLCK
@item F_RDLCK
@file{fcntl.h} (POSIX.1):  @ref{File Locks}.
@comment fread
@item size_t fread (void *@var{data}, size_t @var{size}, size_t @var{count}, FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Block Input/Output}.
@comment __free_hook
@item __free_hook
@file{malloc.h} (GNU):  @ref{Hooks for Malloc}.
@comment free
@item void free (void *@var{ptr})
@file{malloc.h}, @file{stdlib.h} (ANSI):  @ref{Freeing after Malloc}.
@comment freopen
@item FILE * freopen (const char *@var{filename}, const char *@var{opentype}, FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Opening Streams}.
@comment frexp
@item double frexp (double @var{value}, int *@var{exponent})
@file{math.h} (ANSI):  @ref{Normalization Functions}.
@comment fscanf
@item int fscanf (FILE *@var{stream}, const char *@var{template}, @dots{})
@file{stdio.h} (ANSI):  @ref{Formatted Input Functions}.
@comment fseek
@item int fseek (FILE *@var{stream}, long int @var{offset}, int @var{whence})
@file{stdio.h} (ANSI):  @ref{File Positioning}.
@comment F_SETFD
@item int F_SETFD
@file{fcntl.h} (POSIX.1):  @ref{Descriptor Flags}.
@comment F_SETFL
@item int F_SETFL
@file{fcntl.h} (POSIX.1):  @ref{File Status Flags}.
@comment F_SETLK
@item int F_SETLK
@file{fcntl.h} (POSIX.1):  @ref{File Locks}.
@comment F_SETLKW
@item int F_SETLKW
@file{fcntl.h} (POSIX.1):  @ref{File Locks}.
@comment F_SETOWN
@item int F_SETOWN
@file{fcntl.h} (BSD):  @ref{Interrupt Input}.
@comment fsetpos
@item int fsetpos (FILE *@var{stream}, const fpos_t @var{position})
@file{stdio.h} (ANSI):  @ref{Portable Positioning}.
@comment fstat
@item int fstat (int @var{filedes}, struct stat *@var{buf})
@file{sys/stat.h} (POSIX.1):  @ref{Reading Attributes}.
@comment ftell
@item long int ftell (FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{File Positioning}.
@comment F_UNLCK
@item F_UNLCK
@file{fcntl.h} (POSIX.1):  @ref{File Locks}.
@comment fwrite
@item size_t fwrite (const void *@var{data}, size_t @var{size}, size_t @var{count}, FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Block Input/Output}.
@comment F_WRLCK
@item F_WRLCK
@file{fcntl.h} (POSIX.1):  @ref{File Locks}.
@comment getchar
@item int getchar (void)
@file{stdio.h} (ANSI):  @ref{Character Input}.
@comment getc
@item int getc (FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Character Input}.
@comment getcwd
@item char * getcwd (char *@var{buffer}, size_t @var{size})
@file{unistd.h} (POSIX.1):  @ref{Working Directory}.
@comment getdelim
@item ssize_t getdelim (char **@var{lineptr}, size_t *@var{n}, int @var{delimiter}, FILE *@var{stream})
@file{stdio.h} (GNU):  @ref{Line Input}.
@comment getegid
@item gid_t getegid (void)
@file{unistd.h} (POSIX.1):  @ref{Reading Persona}.
@comment getenv
@item char * getenv (const char *@var{name})
@file{stdlib.h} (ANSI):  @ref{Environment Access}.
@comment geteuid
@item uid_t geteuid (void)
@file{unistd.h} (POSIX.1):  @ref{Reading Persona}.
@comment getgid
@item gid_t getgid (void)
@file{unistd.h} (POSIX.1):  @ref{Reading Persona}.
@comment getgrent
@item struct group * getgrent (void)
@file{grp.h} (SVID, BSD):  @ref{Scanning All Groups}.
@comment getgrgid
@item struct group * getgrgid (gid_t @var{gid})
@file{grp.h} (POSIX.1):  @ref{Lookup Group}.
@comment getgrnam
@item struct group * getgrnam (const char *@var{name})
@file{grp.h} (SVID, BSD):  @ref{Lookup Group}.
@comment getgroups
@item int getgroups (int @var{count}, gid_t *@var{groups})
@file{unistd.h} (POSIX.1):  @ref{Reading Persona}.
@comment gethostbyaddr
@item struct hostent * gethostbyaddr (const char *@var{addr}, int @var{length}, int @var{format})
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment gethostbyname
@item struct hostent * gethostbyname (const char *@var{name})
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment gethostent
@item struct hostent * gethostent ()
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment gethostid
@item long int gethostid (void)
@file{unistd.h} (BSD):  @ref{Host Identification}.
@comment gethostname
@item int gethostname (char *@var{name}, size_t @var{size})
@file{unistd.h} (BSD):  @ref{Host Identification}.
@comment getitimer
@item int getitimer (int @var{which}, struct itimerval *@var{old})
@file{sys/time.h} (BSD):  @ref{Setting an Alarm}.
@comment getline
@item ssize_t getline (char **@var{lineptr}, size_t *@var{n}, FILE *@var{stream})
@file{stdio.h} (GNU):  @ref{Line Input}.
@comment getlogin
@item char * getlogin (void)
@file{unistd.h} (POSIX.1):  @ref{Who Logged In}.
@comment getnetbyaddr
@item struct netent * getnetbyaddr (long @var{net}, int @var{type})
@file{netdb.h} (BSD):  @ref{Networks Database}.
@comment getnetbyname
@item struct netent * getnetbyname (const char *@var{name})
@file{netdb.h} (BSD):  @ref{Networks Database}.
@comment getnetent
@item struct netent * getnetent (void)
@file{netdb.h} (BSD):  @ref{Networks Database}.
@comment getopt
@item int getopt (int @var{argc}, char **@var{argv}, const char *@var{options})
@file{unistd.h} (POSIX.2):  @ref{Parsing Options}.
@comment getopt_long
@item int getopt_long (int @var{argc}, char **@var{argv}, const char *@var{shortopts}, struct option *@var{longopts}, int *@var{indexptr})
@file{getopt.h} (GNU):  @ref{Long Options}.
@comment getpeername
@item int getpeername (int @var{socket}, struct sockaddr *@var{addr}, size_t *@var{length_ptr})
@file{sys/socket.h} (BSD):  @ref{Who is Connected}.
@comment getpgrp
@item pid_t getpgrp (pid_t @var{pid})
@file{unistd.h} (BSD):  @ref{Process Group Functions,}.
@comment getpgrp
@item pid_t getpgrp (void)
@file{unistd.h} (POSIX.1):  @ref{Process Group Functions,}.
@comment getpid
@item pid_t getpid (void)
@file{unistd.h} (POSIX.1):  @ref{Process Identification}.
@comment getppid
@item pid_t getppid (void)
@file{unistd.h} (POSIX.1):  @ref{Process Identification}.
@comment getpriority
@item int getpriority (int @var{class}, int @var{id})
@file{sys/resource.h} (BSD):  @ref{Priority}.
@comment getprotobyname
@item struct protoent * getprotobyname (const char *@var{name})
@file{netdb.h} (BSD):  @ref{Protocols Database}.
@comment getprotobynumber
@item struct protoent * getprotobynumber (int @var{protocol})
@file{netdb.h} (BSD):  @ref{Protocols Database}.
@comment getprotoent
@item struct protoent * getprotoent (void)
@file{netdb.h} (BSD):  @ref{Protocols Database}.
@comment getpwent
@item struct passwd * getpwent (void)
@file{pwd.h} (POSIX.1):  @ref{Scanning All Users}.
@comment getpwnam
@item struct passwd * getpwnam (const char *@var{name})
@file{pwd.h} (POSIX.1):  @ref{Lookup User}.
@comment getpwuid
@item struct passwd * getpwuid (uid_t @var{uid})
@file{pwd.h} (POSIX.1):  @ref{Lookup User}.
@comment getrlimit
@item int getrlimit (int @var{resource}, struct rlimit *@var{rlp})
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment getrusage
@item int getrusage (int @var{processes}, struct rusage *@var{rusage})
@file{sys/resource.h} (BSD):  @ref{Resource Usage}.
@comment getservbyname
@item struct servent * getservbyname (const char *@var{name}, const char *@var{proto})
@file{netdb.h} (BSD):  @ref{Services Database}.
@comment getservbyport
@item struct servent * getservbyport (int @var{port}, const char *@var{proto})
@file{netdb.h} (BSD):  @ref{Services Database}.
@comment getservent
@item struct servent * getservent (void)
@file{netdb.h} (BSD):  @ref{Services Database}.
@comment gets
@item char * gets (char *@var{s})
@file{stdio.h} (ANSI):  @ref{Line Input}.
@comment getsockname
@item int getsockname (int @var{socket}, struct sockaddr *@var{addr}, size_t *@var{length_ptr})
@file{sys/socket.h} (BSD):  @ref{Reading Address}.
@comment getsockopt
@item int getsockopt (int @var{socket}, int @var{level}, int @var{optname}, void *@var{optval}, size_t *@var{optlen_ptr})
@file{sys/socket.h} (BSD):  @ref{Socket Option Functions}.
@comment gettimeofday
@item int gettimeofday (struct timeval *@var{tp}, struct timezone *@var{tzp})
@file{sys/time.h} (BSD):  @ref{High-Resolution Calendar}.
@comment getuid
@item uid_t getuid (void)
@file{unistd.h} (POSIX.1):  @ref{Reading Persona}.
@comment getumask
@item mode_t getumask (void)
@file{sys/stat.h} (GNU):  @ref{Setting Permissions}.
@comment getwd
@item char * getwd (char *@var{buffer})
@file{unistd.h} (BSD):  @ref{Working Directory}.
@comment getw
@item int getw (FILE *@var{stream})
@file{stdio.h} (SVID):  @ref{Character Input}.
@comment gid_t
@item gid_t
@file{sys/types.h} (POSIX.1):  @ref{Reading Persona}.
@comment GLOB_ABORTED
@item GLOB_ABORTED
@file{glob.h} (POSIX.2):  @ref{Calling Glob}.
@comment GLOB_APPEND
@item GLOB_APPEND
@file{glob.h} (POSIX.2):  @ref{Flags for Globbing}.
@comment GLOB_DOOFFS
@item GLOB_DOOFFS
@file{glob.h} (POSIX.2):  @ref{Flags for Globbing}.
@comment GLOB_ERR
@item GLOB_ERR
@file{glob.h} (POSIX.2):  @ref{Flags for Globbing}.
@comment glob
@item int glob (const char *@var{pattern}, int @var{flags}, int (*@var{errfunc}) (const char *@var{filename}, int @var{error-code}), glob_t *@var{vector_ptr})
@file{glob.h} (POSIX.2):  @ref{Calling Glob}.
@comment GLOB_MARK
@item GLOB_MARK
@file{glob.h} (POSIX.2):  @ref{Flags for Globbing}.
@comment GLOB_NOCHECK
@item GLOB_NOCHECK
@file{glob.h} (POSIX.2):  @ref{Flags for Globbing}.
@comment GLOB_NOESCAPE
@item GLOB_NOESCAPE
@file{glob.h} (POSIX.2):  @ref{Flags for Globbing}.
@comment GLOB_NOMATCH
@item GLOB_NOMATCH
@file{glob.h} (POSIX.2):  @ref{Calling Glob}.
@comment GLOB_NOSORT
@item GLOB_NOSORT
@file{glob.h} (POSIX.2):  @ref{Flags for Globbing}.
@comment GLOB_NOSPACE
@item GLOB_NOSPACE
@file{glob.h} (POSIX.2):  @ref{Calling Glob}.
@comment glob_t
@item glob_t
@file{glob.h} (POSIX.2):  @ref{Calling Glob}.
@comment gmtime
@item struct tm * gmtime (const time_t *@var{time})
@file{time.h} (ANSI):  @ref{Broken-down Time}.
@comment _GNU_SOURCE
@item _GNU_SOURCE
(GNU):  @ref{Feature Test Macros,}.
@comment gsignal
@item int gsignal (int @var{signum})
@file{signal.h} (SVID):  @ref{Signaling Yourself}.
@comment HOST_NOT_FOUND
@item HOST_NOT_FOUND
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment htonl
@item unsigned long int htonl (unsigned long int @var{hostlong})
@file{netinet/in.h} (BSD):  @ref{Byte Order}.
@comment htons
@item unsigned short int htons (unsigned short int @var{hostshort})
@file{netinet/in.h} (BSD):  @ref{Byte Order}.
@comment HUGE_VAL
@item double HUGE_VAL
@file{math.h} (ANSI):  @ref{Domain and Range Errors}.
@comment HUPCL
@item HUPCL
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment hypot
@item double hypot (double @var{x}, double @var{y})
@file{math.h} (BSD):  @ref{Exponents and Logarithms}.
@comment ICANON
@item ICANON
@file{termios.h} (POSIX.1):  @ref{Local Modes}.
@comment ICRNL
@item ICRNL
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment IEXTEN
@item IEXTEN
@file{termios.h} (POSIX.1):  @ref{Local Modes}.
@comment IGNBRK
@item IGNBRK
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment IGNCR
@item IGNCR
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment IGNPAR
@item IGNPAR
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment IMAXBEL
@item IMAXBEL
@file{termios.h} (BSD):  @ref{Input Modes}.
@comment INADDR_ANY
@item unsigned long int INADDR_ANY
@file{netinet/in.h} (BSD):  @ref{Host Address Data Type}.
@comment INADDR_BROADCAST
@item unsigned long int INADDR_BROADCAST
@file{netinet/in.h} (BSD):  @ref{Host Address Data Type}.
@comment INADDR_LOOPBACK
@item unsigned long int INADDR_LOOPBACK
@file{netinet/in.h} (BSD):  @ref{Host Address Data Type}.
@comment INADDR_NONE
@item unsigned long int INADDR_NONE
@file{netinet/in.h} (BSD):  @ref{Host Address Data Type}.
@comment index
@item char * index (const char *@var{string}, int @var{c})
@file{string.h} (BSD):  @ref{Search Functions,}.
@comment inet_addr
@item unsigned long int inet_addr (const char *@var{name})
@file{arpa/inet.h} (BSD):  @ref{Host Address Functions}.
@comment inet_aton
@item int inet_aton (const char *@var{name}, struct in_addr *@var{addr})
@file{arpa/inet.h} (BSD):  @ref{Host Address Functions}.
@comment inet_lnaof
@item int inet_lnaof (struct in_addr @var{addr})
@file{arpa/inet.h} (BSD):  @ref{Host Address Functions}.
@comment inet_makeaddr
@item struct in_addr inet_makeaddr (int @var{net}, int @var{local})
@file{arpa/inet.h} (BSD):  @ref{Host Address Functions}.
@comment inet_netof
@item int inet_netof (struct in_addr @var{addr})
@file{arpa/inet.h} (BSD):  @ref{Host Address Functions}.
@comment inet_network
@item unsigned long int inet_network (const char *@var{name})
@file{arpa/inet.h} (BSD):  @ref{Host Address Functions}.
@comment inet_ntoa
@item char * inet_ntoa (struct in_addr @var{addr})
@file{arpa/inet.h} (BSD):  @ref{Host Address Functions}.
@comment infnan
@item double infnan (int @var{error})
@file{math.h} (BSD):  @ref{Predicates on Floats}.
@comment initgroups
@item int initgroups (const char *@var{user}, gid_t @var{gid})
@file{grp.h} (BSD):  @ref{Setting Groups}.
@comment initstate
@item void * initstate (unsigned int @var{seed}, void *@var{state}, size_t @var{size})
@file{stdlib.h} (BSD):  @ref{BSD Random}.
@comment INLCR
@item INLCR
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment ino_t
@item ino_t
@file{sys/types.h} (POSIX.1):  @ref{Attribute Meanings}.
@comment INPCK
@item INPCK
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment int
@item int RLIM_INFINITY
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment INT_MAX
@item INT_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment INT_MIN
@item INT_MIN
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment _IOFBF
@item int _IOFBF
@file{stdio.h} (ANSI):  @ref{Controlling Buffering}.
@comment _IOLBF
@item int _IOLBF
@file{stdio.h} (ANSI):  @ref{Controlling Buffering}.
@comment _IONBF
@item int _IONBF
@file{stdio.h} (ANSI):  @ref{Controlling Buffering}.
@comment IPPORT_RESERVED
@item int IPPORT_RESERVED
@file{netinet/in.h} (BSD):  @ref{Ports}.
@comment IPPORT_USERRESERVED
@item int IPPORT_USERRESERVED
@file{netinet/in.h} (BSD):  @ref{Ports}.
@comment isalnum
@item int isalnum (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment isalpha
@item int isalpha (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment isascii
@item int isascii (int @var{c})
@file{ctype.h} (SVID, BSD):  @ref{Classification of Characters,}.
@comment isatty
@item int isatty (int @var{filedes})
@file{unistd.h} (POSIX.1):  @ref{Is It a Terminal}.
@comment isblank
@item int isblank (int @var{c})
@file{ctype.h} (GNU):  @ref{Classification of Characters,}.
@comment iscntrl
@item int iscntrl (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment isdigit
@item int isdigit (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment isgraph
@item int isgraph (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment ISIG
@item ISIG
@file{termios.h} (POSIX.1):  @ref{Local Modes}.
@comment isinf
@item int isinf (double @var{x})
@file{math.h} (BSD):  @ref{Predicates on Floats}.
@comment islower
@item int islower (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment isnan
@item int isnan (double @var{x})
@file{math.h} (BSD):  @ref{Predicates on Floats}.
@comment isprint
@item int isprint (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment ispunct
@item int ispunct (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment isspace
@item int isspace (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment ISTRIP
@item ISTRIP
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment isupper
@item int isupper (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment isxdigit
@item int isxdigit (int @var{c})
@file{ctype.h} (ANSI):  @ref{Classification of Characters,}.
@comment *
@item char * tzname [2]
@file{time.h} (POSIX.1):  @ref{Time Zone Functions}.
@comment ITIMER_PROF
@item ITIMER_PROF
@file{sys/time.h} (BSD):  @ref{Setting an Alarm}.
@comment ITIMER_REAL
@item ITIMER_REAL
@file{sys/time.h} (BSD):  @ref{Setting an Alarm}.
@comment ITIMER_VIRTUAL
@item ITIMER_VIRTUAL
@file{sys/time.h} (BSD):  @ref{Setting an Alarm}.
@comment IXANY
@item IXANY
@file{termios.h} (BSD):  @ref{Input Modes}.
@comment IXOFF
@item IXOFF
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment IXON
@item IXON
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment jmp_buf
@item jmp_buf
@file{setjmp.h} (ANSI):  @ref{Non-Local Details,}.
@comment kill
@item int kill (pid_t @var{pid}, int @var{signum})
@file{signal.h} (POSIX.1):  @ref{Signaling Another Process}.
@comment killpg
@item int killpg (int @var{pgid}, int @var{signum})
@file{signal.h} (BSD):  @ref{Signaling Another Process}.
@comment labs
@item long int labs (long int @var{number})
@file{stdlib.h} (ANSI):  @ref{Absolute Value}.
@comment LANG
@item LANG
@file{locale.h} (ANSI):  @ref{Locale Categories,}.
@comment LC_ALL
@item LC_ALL
@file{locale.h} (ANSI):  @ref{Locale Categories,}.
@comment LC_COLLATE
@item LC_COLLATE
@file{locale.h} (ANSI):  @ref{Locale Categories,}.
@comment LC_CTYPE
@item LC_CTYPE
@file{locale.h} (ANSI):  @ref{Locale Categories,}.
@comment LC_MONETARY
@item LC_MONETARY
@file{locale.h} (ANSI):  @ref{Locale Categories,}.
@comment LC_NUMERIC
@item LC_NUMERIC
@file{locale.h} (ANSI):  @ref{Locale Categories,}.
@comment LC_RESPONSE
@item LC_RESPONSE
@file{locale.h} (GNU):  @ref{Locale Categories,}.
@comment L_ctermid
@item int L_ctermid
@file{stdio.h} (POSIX.1):  @ref{Identifying the Terminal,}.
@comment LC_TIME
@item LC_TIME
@file{locale.h} (ANSI):  @ref{Locale Categories,}.
@comment L_cuserid
@item int L_cuserid
@file{stdio.h} (POSIX.1):  @ref{Who Logged In}.
@comment ldexp
@item double ldexp (double @var{value}, int @var{exponent})
@file{math.h} (ANSI):  @ref{Normalization Functions}.
@comment ldiv
@item ldiv_t ldiv (long int @var{numerator}, long int @var{denominator})
@file{stdlib.h} (ANSI):  @ref{Integer Division}.
@comment ldiv_t
@item ldiv_t
@file{stdlib.h} (ANSI):  @ref{Integer Division}.
@comment L_INCR
@item L_INCR
@file{sys/file.h} (BSD):  @ref{File Positioning}.
@comment LINE_MAX
@item int LINE_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Limits}.
@comment link
@item int link (const char *@var{oldname}, const char *@var{newname})
@file{unistd.h} (POSIX.1):  @ref{Hard Links}.
@comment LINK_MAX
@item int LINK_MAX
@file{limits.h} (POSIX.1):  @ref{Limits for Files}.
@comment listen
@item int listen (int @var{socket}, unsigned int @var{n})
@file{sys/socket.h} (BSD):  @ref{Listening}.
@comment localeconv
@item struct lconv * localeconv (void)
@file{locale.h} (ANSI):  @ref{Numeric Formatting,}.
@comment localtime
@item struct tm * localtime (const time_t *@var{time})
@file{time.h} (ANSI):  @ref{Broken-down Time}.
@comment log10
@item double log10 (double @var{x})
@file{math.h} (ANSI):  @ref{Exponents and Logarithms}.
@comment log1p
@item double log1p (double @var{x})
@file{math.h} (BSD):  @ref{Exponents and Logarithms}.
@comment logb
@item double logb (double @var{x})
@file{math.h} (BSD):  @ref{Normalization Functions}.
@comment log
@item double log (double @var{x})
@file{math.h} (ANSI):  @ref{Exponents and Logarithms}.
@comment longjmp
@item void longjmp (jmp_buf @var{state}, int @var{value})
@file{setjmp.h} (ANSI):  @ref{Non-Local Details,}.
@comment LONG_LONG_MAX
@item LONG_LONG_MAX
@file{limits.h} (GNU):  @ref{Range of Type}.
@comment LONG_LONG_MIN
@item LONG_LONG_MIN
@file{limits.h} (GNU):  @ref{Range of Type}.
@comment LONG_MAX
@item LONG_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment LONG_MIN
@item LONG_MIN
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment lseek
@item off_t lseek (int @var{filedes}, off_t @var{offset}, int @var{whence})
@file{unistd.h} (POSIX.1):  @ref{File Position Primitive}.
@comment L_SET
@item L_SET
@file{sys/file.h} (BSD):  @ref{File Positioning}.
@comment lstat
@item int lstat (const char *@var{filename}, struct stat *@var{buf})
@file{sys/stat.h} (BSD):  @ref{Reading Attributes}.
@comment L_tmpnam
@item int L_tmpnam
@file{stdio.h} (ANSI):  @ref{Temporary Files}.
@comment L_XTND
@item L_XTND
@file{sys/file.h} (BSD):  @ref{File Positioning}.
@comment __malloc_hook
@item __malloc_hook
@file{malloc.h} (GNU):  @ref{Hooks for Malloc}.
@comment malloc
@item void * malloc (size_t @var{size})
@file{malloc.h}, @file{stdlib.h} (ANSI):  @ref{Basic Allocation}.
@comment MAX_CANON
@item int MAX_CANON
@file{limits.h} (POSIX.1):  @ref{Limits for Files}.
@comment MAX_INPUT
@item int MAX_INPUT
@file{limits.h} (POSIX.1):  @ref{Limits for Files}.
@comment MAXNAMLEN
@item int MAXNAMLEN
@file{dirent.h} (BSD):  @ref{Limits for Files}.
@comment MB_CUR_MAX
@item int MB_CUR_MAX
@file{stdlib.h} (ANSI):  @ref{Multibyte Char Intro,}.
@comment mblen
@item int mblen (const char *@var{string}, size_t @var{size})
@file{stdlib.h} (ANSI):  @ref{Length of Char,}.
@comment MB_LEN_MAX
@item int MB_LEN_MAX
@file{limits.h} (ANSI):  @ref{Multibyte Char Intro,}.
@comment mbstowcs
@item size_t mbstowcs (wchar_t *@var{wstring}, const char *@var{string}, size_t @var{size})
@file{stdlib.h} (ANSI):  @ref{Wide String Conversion,}.
@comment mbtowc
@item int mbtowc (wchar_t *@var{result}, const char *@var{string}, size_t @var{size})
@file{stdlib.h} (ANSI):  @ref{Converting One Char,}.
@comment mcheck
@item int mcheck (void (*@var{abortfn}) (void))
@file{malloc.h} (GNU):  @ref{Heap Consistency Checking}.
@comment MDMBUF
@item MDMBUF
@file{termios.h} (BSD):  @ref{Control Modes}.
@comment memalign
@item void * memalign (size_t @var{size}, size_t @var{boundary})
@file{malloc.h}, @file{stdlib.h} (BSD):  @ref{Aligned Memory Blocks}.
@comment memccpy
@item void * memccpy (void *@var{to}, const void *@var{from}, int @var{c}, size_t @var{size})
@file{string.h} (SVID):  @ref{Copying and Concatenation,}.
@comment memchr
@item void * memchr (const void *@var{block}, int @var{c}, size_t @var{size})
@file{string.h} (ANSI):  @ref{Search Functions,}.
@comment memcmp
@item int memcmp (const void *@var{a1}, const void *@var{a2}, size_t @var{size})
@file{string.h} (ANSI):  @ref{String/Array Comparison,}.
@comment memcpy
@item void * memcpy (void *@var{to}, const void *@var{from}, size_t @var{size})
@file{string.h} (ANSI):  @ref{Copying and Concatenation,}.
@comment memmem
@item void * memmem (const void *@var{needle}, size_t @var{needle_len},@*const void *@var{haystack}, size_t @var{haystack_len})
@file{string.h} (GNU):  @ref{Search Functions,}.
@comment memmove
@item void * memmove (void *@var{to}, const void *@var{from}, size_t @var{size})
@file{string.h} (ANSI):  @ref{Copying and Concatenation,}.
@comment memory_warnings
@item void memory_warnings (void *@var{start}, void (*@var{warn_func}) (const char *))
@file{malloc.h} (GNU):  @ref{Memory Warnings}.
@comment memset
@item void * memset (void *@var{block}, int @var{c}, size_t @var{size})
@file{string.h} (ANSI):  @ref{Copying and Concatenation,}.
@comment mkdir
@item int mkdir (const char *@var{filename}, mode_t @var{mode})
@file{sys/stat.h} (POSIX.1):  @ref{Creating Directories}.
@comment mkfifo
@item int mkfifo (const char *@var{filename}, mode_t @var{mode})
@file{sys/stat.h} (POSIX.1):  @ref{FIFO Special Files}.
@comment mknod
@item int mknod (const char *@var{filename}, int @var{mode}, int @var{dev})
@file{sys/stat.h} (BSD):  @ref{Making Special Files}.
@comment mkstemp
@item int mkstemp (char *@var{template})
@file{unistd.h} (BSD):  @ref{Temporary Files}.
@comment mktemp
@item char * mktemp (char *@var{template})
@file{unistd.h} (Unix):  @ref{Temporary Files}.
@comment mktime
@item time_t mktime (struct tm *@var{brokentime})
@file{time.h} (ANSI):  @ref{Broken-down Time}.
@comment mode_t
@item mode_t
@file{sys/types.h} (POSIX.1):  @ref{Attribute Meanings}.
@comment modf
@item double modf (double @var{value}, double *@var{integer_part})
@file{math.h} (ANSI):  @ref{Rounding and Remainders}.
@comment MSG_DONTROUTE
@item int MSG_DONTROUTE
@file{sys/socket.h} (BSD):  @ref{Socket Data Options}.
@comment MSG_OOB
@item int MSG_OOB
@file{sys/socket.h} (BSD):  @ref{Socket Data Options}.
@comment MSG_PEEK
@item int MSG_PEEK
@file{sys/socket.h} (BSD):  @ref{Socket Data Options}.
@comment mstats
@item struct mstats mstats (void)
@file{malloc.h} (GNU):  @ref{Statistics of Malloc}.
@comment NAME_MAX
@item int NAME_MAX
@file{limits.h} (POSIX.1):  @ref{Limits for Files}.
@comment NAN
@item double NAN
@file{math.h} (GNU):  @ref{Not a Number}.
@comment NCCS
@item int NCCS
@file{termios.h} (POSIX.1):  @ref{Mode Data Types}.
@comment NGROUPS_MAX
@item int NGROUPS_MAX
@file{limits.h} (POSIX.1):  @ref{General Limits}.
@comment nice
@item int nice (int @var{increment})
@file{dunno.h} (dunno.h):  @ref{Priority}.
@comment nlink_t
@item nlink_t
@file{sys/types.h} (POSIX.1):  @ref{Attribute Meanings}.
@comment NO_ADDRESS
@item NO_ADDRESS
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment NOFLSH
@item NOFLSH
@file{termios.h} (POSIX.1):  @ref{Local Modes}.
@comment NOKERNINFO
@item NOKERNINFO
@file{termios.h} (BSD):  @ref{Local Modes}.
@comment NO_RECOVERY
@item NO_RECOVERY
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment NSIG
@item int NSIG
@file{signal.h} (BSD):  @ref{Standard Signals}.
@comment ntohl
@item unsigned long int ntohl (unsigned long int @var{netlong})
@file{netinet/in.h} (BSD):  @ref{Byte Order}.
@comment ntohs
@item unsigned short int ntohs (unsigned short int @var{netshort})
@file{netinet/in.h} (BSD):  @ref{Byte Order}.
@comment NULL
@item void * NULL
@file{stddef.h} (ANSI):  @ref{Null Pointer Constant}.
@comment O_ACCMODE
@item int O_ACCMODE
@file{fcntl.h} (POSIX.1):  @ref{File Status Flags}.
@comment O_APPEND
@item O_APPEND
@file{fcntl.h} (POSIX.1):  @ref{File Status Flags}.
@comment O_APPEND
@item O_APPEND
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment obstack_1grow_fast
@item void obstack_1grow_fast (struct obstack *@var{obstack_ptr}, char @var{c})
@file{obstack.h} (GNU):  @ref{Extra Fast Growing}.
@comment obstack_1grow
@item void obstack_1grow (struct obstack *@var{obstack_ptr}, char @var{c})
@file{obstack.h} (GNU):  @ref{Growing Objects}.
@comment obstack_alignment_mask
@item int obstack_alignment_mask (struct obstack *@var{obstack_ptr})
@file{obstack.h} (GNU):  @ref{Obstacks Data Alignment}.
@comment obstack_alloc
@item void * obstack_alloc (struct obstack *@var{obstack_ptr}, size_t @var{size})
@file{obstack.h} (GNU):  @ref{Allocation in an Obstack}.
@comment obstack_base
@item void * obstack_base (struct obstack *@var{obstack_ptr})
@file{obstack.h} (GNU):  @ref{Status of an Obstack}.
@comment obstack_blank_fast
@item void obstack_blank_fast (struct obstack *@var{obstack_ptr}, size_t @var{size})
@file{obstack.h} (GNU):  @ref{Extra Fast Growing}.
@comment obstack_blank
@item void obstack_blank (struct obstack *@var{obstack_ptr}, size_t @var{size})
@file{obstack.h} (GNU):  @ref{Growing Objects}.
@comment obstack_chunk_size
@item size_t obstack_chunk_size (struct obstack *@var{obstack_ptr})
@file{obstack.h} (GNU):  @ref{Obstack Chunks}.
@comment obstack_copy0
@item void * obstack_copy0 (struct obstack *@var{obstack_ptr}, void *@var{address}, size_t @var{size})
@file{obstack.h} (GNU):  @ref{Allocation in an Obstack}.
@comment obstack_copy
@item void * obstack_copy (struct obstack *@var{obstack_ptr}, void *@var{address}, size_t @var{size})
@file{obstack.h} (GNU):  @ref{Allocation in an Obstack}.
@comment obstack_finish
@item void * obstack_finish (struct obstack *@var{obstack_ptr})
@file{obstack.h} (GNU):  @ref{Growing Objects}.
@comment obstack_free
@item void obstack_free (struct obstack *@var{obstack_ptr}, void *@var{object})
@file{obstack.h} (GNU):  @ref{Freeing Obstack Objects}.
@comment obstack_grow0
@item void obstack_grow0 (struct obstack *@var{obstack_ptr}, void *@var{data}, size_t @var{size})
@file{obstack.h} (GNU):  @ref{Growing Objects}.
@comment obstack_grow
@item void obstack_grow (struct obstack *@var{obstack_ptr}, void *@var{data}, size_t @var{size})
@file{obstack.h} (GNU):  @ref{Growing Objects}.
@comment obstack_init
@item int obstack_init (struct obstack *@var{obstack_ptr})
@file{obstack.h} (GNU):  @ref{Preparing for Obstacks}.
@comment obstack_next_free
@item void * obstack_next_free (struct obstack *@var{obstack_ptr})
@file{obstack.h} (GNU):  @ref{Status of an Obstack}.
@comment obstack_object_size
@item size_t obstack_object_size (struct obstack *@var{obstack_ptr})
@file{obstack.h} (GNU):  @ref{Growing Objects}.
@comment obstack_object_size
@item size_t obstack_object_size (struct obstack *@var{obstack_ptr})
@file{obstack.h} (GNU):  @ref{Status of an Obstack}.
@comment obstack_printf
@item int obstack_printf (struct obstack *@var{obstack}, const char *@var{template}, @dots{})
@file{stdio.h} (GNU):  @ref{Dynamic Output}.
@comment obstack_room
@item size_t obstack_room (struct obstack *@var{obstack_ptr})
@file{obstack.h} (GNU):  @ref{Extra Fast Growing}.
@comment obstack_vprintf
@item int obstack_vprintf (struct obstack *@var{obstack}, const char *@var{template}, va_list @var{ap})
@file{stdio.h} (GNU):  @ref{Variable Arguments Output}.
@comment O_CREAT
@item O_CREAT
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment O_EXCL
@item O_EXCL
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment offsetof
@item size_t offsetof (@var{type}, @var{member})
@file{stddef.h} (ANSI):  @ref{Structure Measurement}.
@comment off_t
@item off_t
@file{sys/types.h} (POSIX.1):  @ref{File Position Primitive}.
@comment O_NDELAY
@item O_NDELAY
@file{fcntl.h} (BSD):  @ref{File Status Flags}.
@comment on_exit
@item int on_exit (void (*@var{function})(int @var{status}, void *@var{arg}), void *@var{arg})
@file{stdlib.h} (SunOS):  @ref{Cleanups on Exit}.
@comment ONLCR
@item int ONLCR
@file{termios.h} (BSD):  @ref{Output Modes}.
@comment O_NOCTTY
@item O_NOCTTY
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment ONOEOT
@item int ONOEOT
@file{termios.h} (BSD):  @ref{Output Modes}.
@comment O_NONBLOCK
@item O_NONBLOCK
@file{fcntl.h} (POSIX.1):  @ref{File Status Flags}.
@comment O_NONBLOCK
@item O_NONBLOCK
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment opendir
@item DIR * opendir (const char *@var{dirname})
@file{dirent.h} (POSIX.1):  @ref{Opening a Directory}.
@comment open
@item int open (const char *@var{filename}, int @var{flags}[, mode_t @var{mode}])
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment OPEN_MAX
@item int OPEN_MAX
@file{limits.h} (POSIX.1):  @ref{General Limits}.
@comment open_memstream
@item FILE * open_memstream (char **@var{ptr}, size_t *@var{sizeloc})
@file{stdio.h} (GNU):  @ref{String Streams}.
@comment open_obstack_stream
@item FILE * open_obstack_stream (struct obstack *@var{obstack})
@file{stdio.h} (GNU):  @ref{Obstack Streams}.
@comment OPOST
@item int OPOST
@file{termios.h} (POSIX.1):  @ref{Output Modes}.
@comment optarg
@item char * optarg
@file{unistd.h} (POSIX.2):  @ref{Parsing Options}.
@comment opterr
@item int opterr
@file{unistd.h} (POSIX.2):  @ref{Parsing Options}.
@comment optind
@item int optind
@file{unistd.h} (POSIX.2):  @ref{Parsing Options}.
@comment optopt
@item int optopt
@file{unistd.h} (POSIX.2):  @ref{Parsing Options}.
@comment O_RDONLY
@item O_RDONLY
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment O_RDWR
@item O_RDWR
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment O_TRUNC
@item O_TRUNC
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment O_WRONLY
@item O_WRONLY
@file{fcntl.h} (POSIX.1):  @ref{Opening and Closing Files}.
@comment OXTABS
@item int OXTABS
@file{termios.h} (BSD):  @ref{Output Modes}.
@comment PA_CHAR
@item PA_CHAR
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_DOUBLE
@item PA_DOUBLE
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_FLAG_LONG_DOUBLE
@item PA_FLAG_LONG_DOUBLE
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_FLAG_LONG
@item PA_FLAG_LONG
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_FLAG_LONG_LONG
@item PA_FLAG_LONG_LONG
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_FLAG_MASK
@item int PA_FLAG_MASK
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_FLAG_PTR
@item PA_FLAG_PTR
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_FLAG_SHORT
@item PA_FLAG_SHORT
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_FLOAT
@item PA_FLOAT
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_INT
@item PA_INT
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_LAST
@item PA_LAST
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_POINTER
@item PA_POINTER
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PARENB
@item PARENB
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment PARMRK
@item PARMRK
@file{termios.h} (POSIX.1):  @ref{Input Modes}.
@comment PARODD
@item PARODD
@file{termios.h} (POSIX.1):  @ref{Control Modes}.
@comment parse_printf_format
@item size_t parse_printf_format (const char *@var{template}, size_t @var{n}, int *@var{argtypes})
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment PA_STRING
@item PA_STRING
@file{printf.h} (GNU):  @ref{Parsing a Template String}.
@comment pathconf
@item long int pathconf (const char *@var{filename}, int @var{parameter})
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment PATH_MAX
@item int PATH_MAX
@file{limits.h} (POSIX.1):  @ref{Limits for Files}.
@comment pause
@item int pause ()
@file{unistd.h} (POSIX.1):  @ref{Using Pause}.
@comment _PC_CHOWN_RESTRICTED
@item _PC_CHOWN_RESTRICTED
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment _PC_LINK_MAX
@item _PC_LINK_MAX
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment pclose
@item int pclose (FILE *@var{stream})
@file{stdio.h} (POSIX.2, SVID, BSD):  @ref{Pipe to a Subprocess}.
@comment _PC_MAX_CANON
@item _PC_MAX_CANON
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment _PC_MAX_INPUT
@item _PC_MAX_INPUT
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment _PC_NAME_MAX
@item _PC_NAME_MAX
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment _PC_NO_TRUNC
@item _PC_NO_TRUNC
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment _PC_PATH_MAX
@item _PC_PATH_MAX
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment _PC_PIPE_BUF
@item _PC_PIPE_BUF
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment _PC_VDISABLE
@item _PC_VDISABLE
@file{unistd.h} (POSIX.1):  @ref{Pathconf}.
@comment PENDIN
@item PENDIN
@file{termios.h} (BSD):  @ref{Local Modes}.
@comment perror
@item void perror (const char *@var{message})
@file{stdio.h} (ANSI):  @ref{Error Messages,}.
@comment PF_FILE
@item int PF_FILE
@file{sys/socket.h} (GNU):  @ref{File Namespace Details}.
@comment PF_INET
@item int PF_INET
@file{sys/socket.h} (BSD):  @ref{Internet Namespace}.
@comment PF_UNIX
@item int PF_UNIX
@file{sys/socket.h} (BSD):  @ref{File Namespace Details}.
@comment pid_t
@item pid_t
@file{sys/types.h} (POSIX.1):  @ref{Process Identification}.
@comment PIPE_BUF
@item int PIPE_BUF
@file{limits.h} (POSIX.1):  @ref{Limits for Files}.
@comment pipe
@item int pipe (int @var{filedes}@t{[2]})
@file{unistd.h} (POSIX.1):  @ref{Creating a Pipe}.
@comment popen
@item FILE * popen (const char *@var{command}, const char *@var{mode})
@file{stdio.h} (POSIX.2, SVID, BSD):  @ref{Pipe to a Subprocess}.
@comment _POSIX2_BC_BASE_MAX
@item _POSIX2_BC_BASE_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Minimums}.
@comment _POSIX2_BC_DIM_MAX
@item _POSIX2_BC_DIM_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Minimums}.
@comment _POSIX2_BC_SCALE_MAX
@item _POSIX2_BC_SCALE_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Minimums}.
@comment _POSIX2_BC_STRING_MAX
@item _POSIX2_BC_STRING_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Minimums}.
@comment _POSIX2_C_DEV
@item int _POSIX2_C_DEV
@file{unistd.h} (POSIX.2):  @ref{System Options}.
@comment _POSIX2_COLL_WEIGHTS_MAX
@item _POSIX2_COLL_WEIGHTS_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Minimums}.
@comment _POSIX2_C_VERSION
@item long int _POSIX2_C_VERSION
@file{unistd.h} (POSIX.2):  @ref{Version Supported}.
@comment _POSIX2_EQUIV_CLASS_MAX
@item _POSIX2_EQUIV_CLASS_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Minimums}.
@comment _POSIX2_EXPR_NEST_MAX
@item _POSIX2_EXPR_NEST_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Minimums}.
@comment _POSIX2_FORT_DEV
@item int _POSIX2_FORT_DEV
@file{unistd.h} (POSIX.2):  @ref{System Options}.
@comment _POSIX2_FORT_RUN
@item int _POSIX2_FORT_RUN
@file{unistd.h} (POSIX.2):  @ref{System Options}.
@comment _POSIX2_LINE_MAX
@item _POSIX2_LINE_MAX
@file{limits.h} (POSIX.2):  @ref{Utility Minimums}.
@comment _POSIX2_LOCALEDEF
@item int _POSIX2_LOCALEDEF
@file{unistd.h} (POSIX.2):  @ref{System Options}.
@comment _POSIX2_RE_DUP_MAX
@item _POSIX2_RE_DUP_MAX
@file{limits.h} (POSIX.2):  @ref{Minimums}.
@comment _POSIX2_SW_DEV
@item int _POSIX2_SW_DEV
@file{unistd.h} (POSIX.2):  @ref{System Options}.
@comment _POSIX_ARG_MAX
@item _POSIX_ARG_MAX
@file{limits.h} (POSIX.1):  @ref{Minimums}.
@comment _POSIX_CHILD_MAX
@item _POSIX_CHILD_MAX
@file{limits.h} (POSIX.1):  @ref{Minimums}.
@comment _POSIX_CHOWN_RESTRICTED
@item int _POSIX_CHOWN_RESTRICTED
@file{unistd.h} (POSIX.1):  @ref{Options for Files}.
@comment _POSIX_C_SOURCE
@item _POSIX_C_SOURCE
(POSIX.2):  @ref{Feature Test Macros,}.
@comment _POSIX_JOB_CONTROL
@item int _POSIX_JOB_CONTROL
@file{unistd.h} (POSIX.1):  @ref{System Options}.
@comment _POSIX_LINK_MAX
@item _POSIX_LINK_MAX
@file{limits.h} (POSIX.1):  @ref{File Minimums}.
@comment _POSIX_MAX_CANON
@item _POSIX_MAX_CANON
@file{limits.h} (POSIX.1):  @ref{File Minimums}.
@comment _POSIX_MAX_INPUT
@item _POSIX_MAX_INPUT
@file{limits.h} (POSIX.1):  @ref{File Minimums}.
@comment _POSIX_NAME_MAX
@item _POSIX_NAME_MAX
@file{limits.h} (POSIX.1):  @ref{File Minimums}.
@comment _POSIX_NGROUPS_MAX
@item _POSIX_NGROUPS_MAX
@file{limits.h} (POSIX.1):  @ref{Minimums}.
@comment _POSIX_NO_TRUNC
@item int _POSIX_NO_TRUNC
@file{unistd.h} (POSIX.1):  @ref{Options for Files}.
@comment _POSIX_OPEN_MAX
@item _POSIX_OPEN_MAX
@file{limits.h} (POSIX.1):  @ref{Minimums}.
@comment _POSIX_PATH_MAX
@item _POSIX_PATH_MAX
@file{limits.h} (POSIX.1):  @ref{File Minimums}.
@comment _POSIX_PIPE_BUF
@item _POSIX_PIPE_BUF
@file{limits.h} (POSIX.1):  @ref{File Minimums}.
@comment _POSIX_SAVED_IDS
@item int _POSIX_SAVED_IDS
@file{unistd.h} (POSIX.1):  @ref{System Options}.
@comment _POSIX_SOURCE
@item _POSIX_SOURCE
(POSIX.1):  @ref{Feature Test Macros,}.
@comment _POSIX_SSIZE_MAX
@item _POSIX_SSIZE_MAX
@file{limits.h} (POSIX.1):  @ref{Minimums}.
@comment _POSIX_STREAM_MAX
@item _POSIX_STREAM_MAX
@file{limits.h} (POSIX.1):  @ref{Minimums}.
@comment _POSIX_TZNAME_MAX
@item _POSIX_TZNAME_MAX
@file{limits.h} (POSIX.1):  @ref{Minimums}.
@comment _POSIX_VDISABLE
@item unsigned char _POSIX_VDISABLE
@file{unistd.h} (POSIX.1):  @ref{Options for Files}.
@comment _POSIX_VERSION
@item long int _POSIX_VERSION
@file{unistd.h} (POSIX.1):  @ref{Version Supported}.
@comment pow
@item double pow (double @var{base}, double @var{power})
@file{math.h} (ANSI):  @ref{Exponents and Logarithms}.
@comment printf_arginfo_function
@item printf_arginfo_function
@file{printf.h} (GNU):  @ref{Defining the Output Handler}.
@comment printf_function
@item printf_function
@file{printf.h} (GNU):  @ref{Defining the Output Handler}.
@comment printf
@item int printf (const char *@var{template}, @dots{})
@file{stdio.h} (ANSI):  @ref{Formatted Output Functions}.
@comment PRIO_MAX
@item PRIO_MAX
@file{sys/resource.h} (BSD):  @ref{Priority}.
@comment PRIO_MIN
@item PRIO_MIN
@file{sys/resource.h} (BSD):  @ref{Priority}.
@comment PRIO_PGRP
@item PRIO_PGRP
@file{sys/resource.h} (BSD):  @ref{Priority}.
@comment PRIO_PROCESS
@item PRIO_PROCESS
@file{sys/resource.h} (BSD):  @ref{Priority}.
@comment PRIO_USER
@item PRIO_USER
@file{sys/resource.h} (BSD):  @ref{Priority}.
@comment program_invocation_name
@item char * program_invocation_name
@file{errno.h} (GNU):  @ref{Error Messages,}.
@comment program_invocation_short_name
@item char * program_invocation_short_name
@file{errno.h} (GNU):  @ref{Error Messages,}.
@comment psignal
@item void psignal (int @var{signum}, const char *@var{message})
@file{signal.h} (BSD):  @ref{Signal Messages}.
@comment P_tmpdir
@item char * P_tmpdir
@file{stdio.h} (SVID):  @ref{Temporary Files}.
@comment ptrdiff_t
@item ptrdiff_t
@file{stddef.h} (ANSI):  @ref{Important Data Types}.
@comment putchar
@item int putchar (int @var{c})
@file{stdio.h} (ANSI):  @ref{Simple Output}.
@comment putc
@item int putc (int @var{c}, FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{Simple Output}.
@comment putenv
@item int putenv (const char *@var{string})
@file{stdlib.h} (SVID):  @ref{Environment Access}.
@comment putpwent
@item int putpwent (const struct passwd *@var{p}, FILE *@var{stream})
@file{pwd.h} (SVID):  @ref{Writing a User Entry}.
@comment puts
@item int puts (const char *@var{s})
@file{stdio.h} (ANSI):  @ref{Simple Output}.
@comment putw
@item int putw (int @var{w}, FILE *@var{stream})
@file{stdio.h} (SVID):  @ref{Simple Output}.
@comment qsort
@item void qsort (void *@var{array}, size_t @var{count}, size_t @var{size}, comparison_fn_t @var{compare})
@file{stdlib.h} (ANSI):  @ref{Array Sort Function,}.
@comment raise
@item int raise (int @var{signum})
@file{signal.h} (ANSI):  @ref{Signaling Yourself}.
@comment r_alloc_free
@item void r_alloc_free (void **@var{handleptr})
@file{malloc.h} (GNU):  @ref{Using Relocator}.
@comment r_alloc
@item void * r_alloc (void **@var{handleptr}, size_t @var{size})
@file{malloc.h} (GNU):  @ref{Using Relocator}.
@comment rand
@item int rand ()
@file{stdlib.h} (ANSI):  @ref{ANSI Random}.
@comment RAND_MAX
@item int RAND_MAX
@file{stdlib.h} (ANSI):  @ref{ANSI Random}.
@comment random
@item long int random ()
@file{stdlib.h} (BSD):  @ref{BSD Random}.
@comment readdir
@item struct dirent * readdir (DIR *@var{dirstream})
@file{dirent.h} (POSIX.1):  @ref{Reading/Closing Directory}.
@comment read
@item ssize_t read (int @var{filedes}, void *@var{buffer}, size_t @var{size})
@file{unistd.h} (POSIX.1):  @ref{I/O Primitives}.
@comment readlink
@item int readlink (const char *@var{filename}, char *@var{buffer}, size_t @var{size})
@file{unistd.h} (BSD):  @ref{Symbolic Links}.
@comment __realloc_hook
@item __realloc_hook
@file{malloc.h} (GNU):  @ref{Hooks for Malloc}.
@comment realloc
@item void * realloc (void *@var{ptr}, size_t @var{newsize})
@file{malloc.h}, @file{stdlib.h} (ANSI):  @ref{Changing Block Size}.
@comment recvfrom
@item int recvfrom (int @var{socket}, void *@var{buffer}, size_t @var{size}, int @var{flags}, struct sockaddr *@var{addr}, size_t *@var{length_ptr})
@file{sys/socket.h} (BSD):  @ref{Receiving Datagrams}.
@comment recv
@item int recv (int @var{socket}, void *@var{buffer}, size_t @var{size}, int @var{flags})
@file{sys/socket.h} (BSD):  @ref{Receiving Data}.
@comment recvmsg
@item int recvmsg (int @var{socket}, struct msghdr *@var{message}, int @var{flags})
@file{sys/socket.h} (BSD):  @ref{Receiving Datagrams}.
@comment RE_DUP_MAX
@item int RE_DUP_MAX
@file{limits.h} (POSIX.2):  @ref{General Limits}.
@comment REG_BADBR
@item REG_BADBR
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_BADPAT
@item REG_BADPAT
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_BADRPT
@item REG_BADRPT
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment regcomp
@item int regcomp (regex_t *@var{compiled}, const char *@var{pattern}, int @var{cflags})
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_EBRACE
@item REG_EBRACE
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_EBRACK
@item REG_EBRACK
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_ECOLLATE
@item REG_ECOLLATE
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_ECTYPE
@item REG_ECTYPE
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_EESCAPE
@item REG_EESCAPE
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_EPAREN
@item REG_EPAREN
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_ERANGE
@item REG_ERANGE
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment regerror
@item size_t regerror (int @var{errcode}, regex_t *@var{compiled}, char *@var{buffer}, size_t @var{length})
@file{regex.h} (POSIX.2):  @ref{Regexp Cleanup}.
@comment REG_ESPACE
@item REG_ESPACE
@file{regex.h} (POSIX.2):  @ref{Matching POSIX Regexps}.
@comment REG_ESPACE
@item REG_ESPACE
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment REG_ESUBREG
@item REG_ESUBREG
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment regexec
@item int regexec (regex_t *@var{compiled}, char *@var{string}, size_t @var{nmatch}, regmatch_t @var{matchptr} @t{[]}, int @var{eflags})
@file{regex.h} (POSIX.2):  @ref{Matching POSIX Regexps}.
@comment REG_EXTENDED
@item REG_EXTENDED
@file{regex.h} (POSIX.2):  @ref{Flags for POSIX Regexps}.
@comment regex_t
@item regex_t
@file{regex.h} (POSIX.2):  @ref{POSIX Regexp Compilation}.
@comment regfree
@item void regfree (regex_t *@var{compiled})
@file{regex.h} (POSIX.2):  @ref{Regexp Cleanup}.
@comment REG_ICASE
@item REG_ICASE
@file{regex.h} (POSIX.2):  @ref{Flags for POSIX Regexps}.
@comment register_printf_function
@item int register_printf_function (int @var{spec}, printf_function @var{handler_function}, printf_arginfo_function @var{arginfo_function})
@file{printf.h} (GNU):  @ref{Registering New Conversions}.
@comment regmatch_t
@item regmatch_t
@file{regex.h} (POSIX.2):  @ref{Regexp Subexpressions}.
@comment REG_NEWLINE
@item REG_NEWLINE
@file{regex.h} (POSIX.2):  @ref{Flags for POSIX Regexps}.
@comment REG_NOMATCH
@item REG_NOMATCH
@file{regex.h} (POSIX.2):  @ref{Matching POSIX Regexps}.
@comment REG_NOSUB
@item REG_NOSUB
@file{regex.h} (POSIX.2):  @ref{Flags for POSIX Regexps}.
@comment REG_NOTBOL
@item REG_NOTBOL
@file{regex.h} (POSIX.2):  @ref{Matching POSIX Regexps}.
@comment REG_NOTEOL
@item REG_NOTEOL
@file{regex.h} (POSIX.2):  @ref{Matching POSIX Regexps}.
@comment regoff_t
@item regoff_t
@file{regex.h} (POSIX.2):  @ref{Regexp Subexpressions}.
@comment remove
@item int remove (const char *@var{filename})
@file{stdio.h} (ANSI):  @ref{Deleting Files}.
@comment rename
@item int rename (const char *@var{oldname}, const char *@var{newname})
@file{stdio.h} (ANSI):  @ref{Renaming Files}.
@comment rewinddir
@item void rewinddir (DIR *@var{dirstream})
@file{dirent.h} (POSIX.1):  @ref{Random Access Directory}.
@comment rewind
@item void rewind (FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{File Positioning}.
@comment rindex
@item char * rindex (const char *@var{string}, int @var{c})
@file{string.h} (BSD):  @ref{Search Functions,}.
@comment rint
@item double rint (double @var{x})
@file{math.h} (BSD):  @ref{Rounding and Remainders}.
@comment RLIMIT_CORE
@item RLIMIT_CORE
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment RLIMIT_CPU
@item RLIMIT_CPU
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment RLIMIT_DATA
@item RLIMIT_DATA
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment RLIMIT_FSIZE
@item RLIMIT_FSIZE
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment RLIMIT_OPEN_FILES
@item RLIMIT_OPEN_FILES
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment RLIMIT_RSS
@item RLIMIT_RSS
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment RLIMIT_STACK
@item RLIMIT_STACK
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment RLIM_NLIMITS
@item RLIM_NLIMITS
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment rmdir
@item int rmdir (const char *@var{filename})
@file{unistd.h} (POSIX.1):  @ref{Deleting Files}.
@comment R_OK
@item int R_OK
@file{unistd.h} (POSIX.1):  @ref{Testing File Access}.
@comment r_re_alloc
@item void * r_re_alloc (void **@var{handleptr}, size_t @var{size})
@file{malloc.h} (GNU):  @ref{Using Relocator}.
@comment RUSAGE_CHILDREN
@item RUSAGE_CHILDREN
@file{sys/resource.h} (BSD):  @ref{Resource Usage}.
@comment RUSAGE_SELF
@item RUSAGE_SELF
@file{sys/resource.h} (BSD):  @ref{Resource Usage}.
@comment SA_NOCLDSTOP
@item int SA_NOCLDSTOP
@file{signal.h} (POSIX.1):  @ref{Flags for Sigaction}.
@comment SA_ONSTACK
@item int SA_ONSTACK
@file{signal.h} (BSD):  @ref{Flags for Sigaction}.
@comment SA_RESTART
@item int SA_RESTART
@file{signal.h} (BSD):  @ref{Flags for Sigaction}.
@comment _SC_2_C_DEV
@item _SC_2_C_DEV
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_2_FORT_DEV
@item _SC_2_FORT_DEV
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_2_FORT_RUN
@item _SC_2_FORT_RUN
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_2_LOCALEDEF
@item _SC_2_LOCALEDEF
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_2_SW_DEV
@item _SC_2_SW_DEV
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_2_VERSION
@item _SC_2_VERSION
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment scalb
@item double scalb (double @var{value}, int @var{exponent})
@file{math.h} (BSD):  @ref{Normalization Functions}.
@comment scanf
@item int scanf (const char *@var{template}, @dots{})
@file{stdio.h} (ANSI):  @ref{Formatted Input Functions}.
@comment _SC_ARG_MAX
@item _SC_ARG_MAX
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_BC_BASE_MAX
@item _SC_BC_BASE_MAX
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_BC_DIM_MAX
@item _SC_BC_DIM_MAX
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_BC_SCALE_MAX
@item _SC_BC_SCALE_MAX
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_BC_STRING_MAX
@item _SC_BC_STRING_MAX
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_CHILD_MAX
@item _SC_CHILD_MAX
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_CLK_TCK
@item _SC_CLK_TCK
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_COLL_WEIGHTS_MAX
@item _SC_COLL_WEIGHTS_MAX
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_EQUIV_CLASS_MAX
@item _SC_EQUIV_CLASS_MAX
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_EXPR_NEST_MAX
@item _SC_EXPR_NEST_MAX
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment SCHAR_MAX
@item SCHAR_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment SCHAR_MIN
@item SCHAR_MIN
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment _SC_JOB_CONTROL
@item _SC_JOB_CONTROL
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_LINE_MAX
@item _SC_LINE_MAX
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment _SC_NGROUPS_MAX
@item _SC_NGROUPS_MAX
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_OPEN_MAX
@item _SC_OPEN_MAX
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_PAGESIZE
@item _SC_PAGESIZE
@file{unistd.h} (GNU):  @ref{Constants for Sysconf}.
@comment _SC_SAVED_IDS
@item _SC_SAVED_IDS
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_STREAM_MAX
@item _SC_STREAM_MAX
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_TZNAME_MAX
@item _SC_TZNAME_MAX
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_VERSION
@item _SC_VERSION
@file{unistd.h} (POSIX.1):  @ref{Constants for Sysconf}.
@comment _SC_VERSION
@item _SC_VERSION
@file{unistd.h} (POSIX.2):  @ref{Constants for Sysconf}.
@comment SEEK_CUR
@item int SEEK_CUR
@file{stdio.h} (ANSI):  @ref{File Positioning}.
@comment seekdir
@item void seekdir (DIR *@var{dirstream}, off_t @var{pos})
@file{dirent.h} (BSD):  @ref{Random Access Directory}.
@comment SEEK_END
@item int SEEK_END
@file{stdio.h} (ANSI):  @ref{File Positioning}.
@comment SEEK_SET
@item int SEEK_SET
@file{stdio.h} (ANSI):  @ref{File Positioning}.
@comment select
@item int select (int @var{nfds}, fd_set *@var{read_fds}, fd_set *@var{write_fds}, fd_set *@var{except_fds}, struct timeval *@var{timeout})
@file{sys/types.h} (BSD):  @ref{Waiting for I/O}.
@comment send
@item int send (int @var{socket}, void *@var{buffer}, size_t @var{size}, int @var{flags})
@file{sys/socket.h} (BSD):  @ref{Sending Data}.
@comment sendmsg
@item int sendmsg (int @var{socket}, const struct msghdr *@var{message}, int @var{flags})
@file{sys/socket.h} (BSD):  @ref{Receiving Datagrams}.
@comment sendto
@item int sendto (int @var{socket}, void *@var{buffer}. size_t @var{size}, int @var{flags}, struct sockaddr *@var{addr}, size_t @var{length})
@file{sys/socket.h} (BSD):  @ref{Sending Datagrams}.
@comment setbuffer
@item void setbuffer (FILE *@var{stream}, char *@var{buf}, size_t @var{size})
@file{stdio.h} (BSD):  @ref{Controlling Buffering}.
@comment setbuf
@item void setbuf (FILE *@var{stream}, char *@var{buf})
@file{stdio.h} (ANSI):  @ref{Controlling Buffering}.
@comment setgid
@item int setgid (gid_t @var{newgid})
@file{unistd.h} (POSIX.1):  @ref{Setting Groups}.
@comment setgrent
@item void setgrent (void)
@file{grp.h} (SVID, BSD):  @ref{Scanning All Groups}.
@comment setgroups
@item int setgroups (size_t @var{count}, gid_t *@var{groups})
@file{grp.h} (BSD):  @ref{Setting Groups}.
@comment sethostent
@item void sethostent (int @var{stayopen})
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment sethostid
@item int sethostid (long int @var{id})
@file{unistd.h} (BSD):  @ref{Host Identification}.
@comment sethostname
@item int sethostname (const char *@var{name}, size_t @var{length})
@file{unistd.h} (BSD):  @ref{Host Identification}.
@comment setitimer
@item int setitimer (int @var{which}, struct itimerval *@var{new}, struct itimerval *@var{old})
@file{sys/time.h} (BSD):  @ref{Setting an Alarm}.
@comment setjmp
@item int setjmp (jmp_buf @var{state})
@file{setjmp.h} (ANSI):  @ref{Non-Local Details,}.
@comment setlinebuf
@item void setlinebuf (FILE *@var{stream})
@file{stdio.h} (BSD):  @ref{Controlling Buffering}.
@comment setlocale
@item char * setlocale (int @var{category}, const char *@var{locale})
@file{locale.h} (ANSI):  @ref{Setting the Locale,}.
@comment setnetent
@item void setnetent (int @var{stayopen})
@file{netdb.h} (BSD):  @ref{Networks Database}.
@comment setpgid
@item int setpgid (pid_t @var{pid}, pid_t @var{pgid})
@file{unistd.h} (POSIX.1):  @ref{Process Group Functions,}.
@comment setpgrp
@item int setpgrp (pid_t @var{pid}, pid_t @var{pgid})
@file{unistd.h} (BSD):  @ref{Process Group Functions,}.
@comment setpriority
@item int setpriority (int @var{class}, int @var{id}, int @var{priority})
@file{sys/resource.h} (BSD):  @ref{Priority}.
@comment setprotoent
@item void setprotoent (int @var{stayopen})
@file{netdb.h} (BSD):  @ref{Protocols Database}.
@comment setpwent
@item void setpwent (void)
@file{pwd.h} (SVID, BSD):  @ref{Scanning All Users}.
@comment setregid
@item int setregid (gid_t @var{rgid}, fid_t @var{egid})
@file{unistd.h} (BSD):  @ref{Setting Groups}.
@comment setreuid
@item int setreuid (uid_t @var{ruid}, uid_t @var{euid})
@file{unistd.h} (BSD):  @ref{Setting User ID}.
@comment setrlimit
@item int setrlimit (int @var{resource}, struct rlimit *@var{rlp})
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment setservent
@item void setservent (int @var{stayopen})
@file{netdb.h} (BSD):  @ref{Services Database}.
@comment setsid
@item pid_t setsid (void)
@file{unistd.h} (POSIX.1):  @ref{Process Group Functions,}.
@comment setsockopt
@item int setsockopt (int @var{socket}, int @var{level}, int @var{optname}, void *@var{optval}, size_t @var{optlen})
@file{sys/socket.h} (BSD):  @ref{Socket Option Functions}.
@comment setstate
@item void * setstate (void *@var{state})
@file{stdlib.h} (BSD):  @ref{BSD Random}.
@comment settimeofday
@item int settimeofday (const struct timeval *@var{tp}, const struct timezone *@var{tzp})
@file{sys/time.h} (BSD):  @ref{High-Resolution Calendar}.
@comment setuid
@item int setuid (uid_t @var{newuid})
@file{unistd.h} (POSIX.1):  @ref{Setting User ID}.
@comment setvbuf
@item int setvbuf (FILE *@var{stream}, char *@var{buf}, int @var{mode}, size_t @var{size})
@file{stdio.h} (ANSI):  @ref{Controlling Buffering}.
@comment SHRT_MAX
@item SHRT_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment SHRT_MIN
@item SHRT_MIN
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment shutdown
@item int shutdown (int @var{socket}, int @var{how})
@file{sys/socket.h} (BSD):  @ref{Closing a Socket}.
@comment S_IEXEC
@item S_IEXEC
@file{sys/stat.h} (BSD):  @ref{Permission Bits}.
@comment S_IFBLK
@item S_IFBLK
@file{sys/stat.h} (BSD):  @ref{Testing File Type}.
@comment S_IFCHR
@item S_IFCHR
@file{sys/stat.h} (BSD):  @ref{Testing File Type}.
@comment S_IFDIR
@item S_IFDIR
@file{sys/stat.h} (BSD):  @ref{Testing File Type}.
@comment S_IFIFO
@item S_IFIFO
@file{sys/stat.h} (BSD):  @ref{Testing File Type}.
@comment S_IFLNK
@item S_IFLNK
@file{sys/stat.h} (BSD):  @ref{Testing File Type}.
@comment S_IFMT
@item int S_IFMT
@file{sys/stat.h} (BSD):  @ref{Testing File Type}.
@comment S_IFREG
@item S_IFREG
@file{sys/stat.h} (BSD):  @ref{Testing File Type}.
@comment S_IFSOCK
@item S_IFSOCK
@file{sys/stat.h} (BSD):  @ref{Testing File Type}.
@comment SIGABRT
@item int SIGABRT
@file{signal.h} (ANSI):  @ref{Program Error Signals}.
@comment sigaction
@item int sigaction (int @var{signum}, const struct sigaction *@var{action}, struct sigaction *@var{old_action})
@file{signal.h} (POSIX.1):  @ref{Advanced Signal Handling}.
@comment sigaddset
@item int sigaddset (sigset_t *@var{set}, int @var{signum})
@file{signal.h} (POSIX.1):  @ref{Signal Sets}.
@comment SIGALRM
@item int SIGALRM
@file{signal.h} (POSIX.1):  @ref{Alarm Signals}.
@comment sigaltstack
@item int sigaltstack (const struct sigaltstack *@var{stack}, struct sigaltstack *@var{oldstack})
@file{signal.h} (BSD):  @ref{Signal Stack}.
@comment sig_atomic_t
@item sig_atomic_t
@file{signal.h} (ANSI):  @ref{Atomic Types}.
@comment sigblock
@item int sigblock (int @var{mask})
@file{signal.h} (BSD):  @ref{Blocking in BSD}.
@comment SIG_BLOCK
@item SIG_BLOCK
@file{signal.h} (POSIX.1):  @ref{Process Signal Mask}.
@comment SIGBUS
@item int SIGBUS
@file{signal.h} (BSD):  @ref{Program Error Signals}.
@comment SIGCHLD
@item int SIGCHLD
@file{signal.h} (POSIX.1):  @ref{Job Control Signals}.
@comment SIGCONT
@item int SIGCONT
@file{signal.h} (POSIX.1):  @ref{Job Control Signals}.
@comment sigdelset
@item int sigdelset (sigset_t *@var{set}, int @var{signum})
@file{signal.h} (POSIX.1):  @ref{Signal Sets}.
@comment sigemptyset
@item int sigemptyset (sigset_t *@var{set})
@file{signal.h} (POSIX.1):  @ref{Signal Sets}.
@comment SIG_ERR
@item sighandler_t SIG_ERR
@file{signal.h} (ANSI):  @ref{Basic Signal Handling}.
@comment sigfillset
@item int sigfillset (sigset_t *@var{set})
@file{signal.h} (POSIX.1):  @ref{Signal Sets}.
@comment SIGFPE
@item int SIGFPE
@file{signal.h} (ANSI):  @ref{Program Error Signals}.
@comment sighandler_t
@item sighandler_t
@file{signal.h} (GNU):  @ref{Basic Signal Handling}.
@comment SIGHUP
@item int SIGHUP
@file{signal.h} (POSIX.1):  @ref{Termination Signals}.
@comment SIGILL
@item int SIGILL
@file{signal.h} (ANSI):  @ref{Program Error Signals}.
@comment siginterrupt
@item int siginterrupt (int @var{signum}, int @var{failflag})
@file{signal.h} (BSD):  @ref{BSD Handler}.
@comment SIGINT
@item int SIGINT
@file{signal.h} (ANSI):  @ref{Termination Signals}.
@comment SIGIO
@item int SIGIO
@file{signal.h} (BSD):  @ref{Asynchronous I/O Signals}.
@comment sigismember
@item int sigismember (const sigset_t *@var{set}, int @var{signum})
@file{signal.h} (POSIX.1):  @ref{Signal Sets}.
@comment sigjmp_buf
@item sigjmp_buf
@file{setjmp.h} (POSIX.1):  @ref{Non-Local Exits and Signals,,}.
@comment SIGKILL
@item int SIGKILL
@file{signal.h} (POSIX.1):  @ref{Termination Signals}.
@comment siglongjmp
@item void siglongjmp (sigjmp_buf @var{state}, int @var{value})
@file{setjmp.h} (POSIX.1):  @ref{Non-Local Exits and Signals,,}.
@comment sigmask
@item int sigmask (int @var{signum})
@file{signal.h} (BSD):  @ref{Blocking in BSD}.
@comment signal
@item sighandler_t signal (int @var{signum}, sighandler_t @var{action})
@file{signal.h} (ANSI):  @ref{Basic Signal Handling}.
@comment sigpause
@item int sigpause (int @var{mask})
@file{signal.h} (BSD):  @ref{Blocking in BSD}.
@comment sigpending
@item int sigpending (sigset_t *@var{set})
@file{signal.h} (POSIX.1):  @ref{Checking for Pending Signals}.
@comment SIGPIPE
@item int SIGPIPE
@file{signal.h} (POSIX.1):  @ref{Miscellaneous Signals}.
@comment sigprocmask
@item int sigprocmask (int @var{how}, const sigset_t *@var{set}, sigset_t *@var{oldset})
@file{signal.h} (POSIX.1):  @ref{Process Signal Mask}.
@comment SIGPROF
@item int SIGPROF
@file{signal.h} (BSD):  @ref{Alarm Signals}.
@comment SIGQUIT
@item int SIGQUIT
@file{signal.h} (POSIX.1):  @ref{Termination Signals}.
@comment SIGSEGV
@item int SIGSEGV
@file{signal.h} (ANSI):  @ref{Program Error Signals}.
@comment sigsetjmp
@item int sigsetjmp (sigjmp_buf @var{state}, int @var{savesigs})
@file{setjmp.h} (POSIX.1):  @ref{Non-Local Exits and Signals,,}.
@comment sigsetmask
@item int sigsetmask (int @var{mask})
@file{signal.h} (BSD):  @ref{Blocking in BSD}.
@comment SIG_SETMASK
@item SIG_SETMASK
@file{signal.h} (POSIX.1):  @ref{Process Signal Mask}.
@comment sigset_t
@item sigset_t
@file{signal.h} (POSIX.1):  @ref{Signal Sets}.
@comment sigstack
@item int sigstack (const struct sigstack *@var{stack}, struct sigstack *@var{oldstack})
@file{signal.h} (BSD):  @ref{Signal Stack}.
@comment SIGSTOP
@item int SIGSTOP
@file{signal.h} (POSIX.1):  @ref{Job Control Signals}.
@comment sigsuspend
@item int sigsuspend (const sigset_t *@var{set})
@file{signal.h} (POSIX.1):  @ref{Sigsuspend}.
@comment SIGTERM
@item int SIGTERM
@file{signal.h} (ANSI):  @ref{Termination Signals}.
@comment SIGTSTP
@item int SIGTSTP
@file{signal.h} (POSIX.1):  @ref{Job Control Signals}.
@comment SIGTTIN
@item int SIGTTIN
@file{signal.h} (POSIX.1):  @ref{Job Control Signals}.
@comment SIGTTOU
@item int SIGTTOU
@file{signal.h} (POSIX.1):  @ref{Job Control Signals}.
@comment SIG_UNBLOCK
@item SIG_UNBLOCK
@file{signal.h} (POSIX.1):  @ref{Process Signal Mask}.
@comment SIGURG
@item int SIGURG
@file{signal.h} (BSD):  @ref{Asynchronous I/O Signals}.
@comment SIGUSR1
@item int SIGUSR1
@file{signal.h} (POSIX.1):  @ref{Miscellaneous Signals}.
@comment SIGUSR2
@item int SIGUSR2
@file{signal.h} (POSIX.1):  @ref{Miscellaneous Signals}.
@comment sigvec
@item int sigvec (int @var{signum}, const struct sigvec *@var{action},struct sigvec *@var{old_action})
@file{signal.h} (BSD):  @ref{BSD Handler}.
@comment SIGVTALRM
@item int SIGVTALRM
@file{signal.h} (BSD):  @ref{Alarm Signals}.
@comment sinh
@item double sinh (double @var{x})
@file{math.h} (ANSI):  @ref{Hyperbolic Functions}.
@comment sin
@item double sin (double @var{x})
@file{math.h} (ANSI):  @ref{Trig Functions}.
@comment S_IREAD
@item S_IREAD
@file{sys/stat.h} (BSD):  @ref{Permission Bits}.
@comment S_IRGRP
@item S_IRGRP
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IROTH
@item S_IROTH
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IRUSR
@item S_IRUSR
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IRWXG
@item S_IRWXG
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IRWXO
@item S_IRWXO
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IRWXU
@item S_IRWXU
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_ISBLK
@item int S_ISBLK (mode_t @var{m})
@file{sys/stat.h} (POSIX):  @ref{Testing File Type}.
@comment S_ISCHR
@item int S_ISCHR (mode_t @var{m})
@file{sys/stat.h} (POSIX):  @ref{Testing File Type}.
@comment S_ISDIR
@item int S_ISDIR (mode_t @var{m})
@file{sys/stat.h} (POSIX):  @ref{Testing File Type}.
@comment S_ISFIFO
@item int S_ISFIFO (mode_t @var{m})
@file{sys/stat.h} (POSIX):  @ref{Testing File Type}.
@comment S_ISGID
@item S_ISGID
@file{sys/stat.h} (POSIX):  @ref{Permission Bits}.
@comment S_ISLNK
@item int S_ISLNK (mode_t @var{m})
@file{sys/stat.h} (GNU):  @ref{Testing File Type}.
@comment S_ISREG
@item int S_ISREG (mode_t @var{m})
@file{sys/stat.h} (POSIX):  @ref{Testing File Type}.
@comment S_ISSOCK
@item int S_ISSOCK (mode_t @var{m})
@file{sys/stat.h} (GNU):  @ref{Testing File Type}.
@comment S_ISUID
@item S_ISUID
@file{sys/stat.h} (POSIX):  @ref{Permission Bits}.
@comment S_ISVTX
@item S_ISVTX
@file{sys/stat.h} (BSD):  @ref{Permission Bits}.
@comment S_IWGRP
@item S_IWGRP
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IWOTH
@item S_IWOTH
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IWRITE
@item S_IWRITE
@file{sys/stat.h} (BSD):  @ref{Permission Bits}.
@comment S_IWUSR
@item S_IWUSR
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IXGRP
@item S_IXGRP
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IXOTH
@item S_IXOTH
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment S_IXUSR
@item S_IXUSR
@file{sys/stat.h} (POSIX.1):  @ref{Permission Bits}.
@comment size_t
@item size_t
@file{stddef.h} (ANSI):  @ref{Important Data Types}.
@comment sleep
@item unsigned int sleep (unsigned int @var{seconds})
@file{unistd.h} (POSIX.1):  @ref{Sleeping}.
@comment snprintf
@item int snprintf (char *@var{s}, size_t @var{size}, const char *@var{template}, @dots{})
@file{stdio.h} (GNU):  @ref{Formatted Output Functions}.
@comment SO_BROADCAST
@item SO_BROADCAST
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SOCK_DGRAM
@item int SOCK_DGRAM
@file{sys/socket.h} (BSD):  @ref{Communication Styles}.
@comment socket
@item int socket (int @var{namespace}, int @var{style}, int @var{protocol})
@file{sys/socket.h} (BSD):  @ref{Creating a Socket}.
@comment socketpair
@item int socketpair (int @var{namespace}, int @var{style}, int @var{protocol}, int @var{filedes}@t{[2]})
@file{sys/socket.h} (BSD):  @ref{Socket Pairs}.
@comment SOCK_RAW
@item int SOCK_RAW
@file{sys/socket.h} (BSD):  @ref{Communication Styles}.
@comment SOCK_RDM
@item int SOCK_RDM
@file{sys/socket.h} (BSD):  @ref{Communication Styles}.
@comment SOCK_SEQPACKET
@item int SOCK_SEQPACKET
@file{sys/socket.h} (BSD):  @ref{Communication Styles}.
@comment SOCK_STREAM
@item int SOCK_STREAM
@file{sys/socket.h} (BSD):  @ref{Communication Styles}.
@comment SO_DEBUG
@item SO_DEBUG
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SO_DONTROUTE
@item SO_DONTROUTE
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SO_ERROR
@item SO_ERROR
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SO_KEEPALIVE
@item SO_KEEPALIVE
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SO_LINGER
@item SO_LINGER
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SOL_SOCKET
@item int SOL_SOCKET
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SO_OOBINLINE
@item SO_OOBINLINE
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SO_RCVBUF
@item SO_RCVBUF
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SO_REUSEADDR
@item SO_REUSEADDR
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SO_SNDBUF
@item SO_SNDBUF
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment SO_STYLE
@item SO_STYLE
@file{sys/socket.h} (GNU):  @ref{Socket-Level Options}.
@comment SO_TYPE
@item SO_TYPE
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment speed_t
@item speed_t
@file{termios.h} (POSIX.1):  @ref{Line Speed}.
@comment sprintf
@item int sprintf (char *@var{s}, const char *@var{template}, @dots{})
@file{stdio.h} (ANSI):  @ref{Formatted Output Functions}.
@comment sqrt
@item double sqrt (double @var{x})
@file{math.h} (ANSI):  @ref{Exponents and Logarithms}.
@comment srand
@item void srand (unsigned int @var{seed})
@file{stdlib.h} (ANSI):  @ref{ANSI Random}.
@comment srandom
@item void srandom (unsigned int @var{seed})
@file{stdlib.h} (BSD):  @ref{BSD Random}.
@comment sscanf
@item int sscanf (const char *@var{s}, const char *@var{template}, @dots{})
@file{stdio.h} (ANSI):  @ref{Formatted Input Functions}.
@comment ssignal
@item sighandler_t ssignal (int @var{signum}, sighandler_t @var{action})
@file{signal.h} (SVID):  @ref{Basic Signal Handling}.
@comment SSIZE_MAX
@item int SSIZE_MAX
@file{limits.h} (POSIX.1):  @ref{General Limits}.
@comment ssize_t
@item ssize_t
@file{unistd.h} (POSIX.1):  @ref{I/O Primitives}.
@comment stat
@item int stat (const char *@var{filename}, struct stat *@var{buf})
@file{sys/stat.h} (POSIX.1):  @ref{Reading Attributes}.
@comment STDERR_FILENO
@item STDERR_FILENO
@file{unistd.h} (POSIX.1):  @ref{Descriptors and Streams}.
@comment stderr
@item FILE * stderr
@file{stdio.h} (ANSI):  @ref{Standard Streams}.
@comment STDIN_FILENO
@item STDIN_FILENO
@file{unistd.h} (POSIX.1):  @ref{Descriptors and Streams}.
@comment stdin
@item FILE * stdin
@file{stdio.h} (ANSI):  @ref{Standard Streams}.
@comment STDOUT_FILENO
@item STDOUT_FILENO
@file{unistd.h} (POSIX.1):  @ref{Descriptors and Streams}.
@comment stdout
@item FILE * stdout
@file{stdio.h} (ANSI):  @ref{Standard Streams}.
@comment stpcpy
@item char * stpcpy (char *@var{to}, const char *@var{from})
@file{string.h} (Unknown origin):  @ref{Copying and Concatenation,}.
@comment strcasecmp
@item int strcasecmp (const char *@var{s1}, const char *@var{s2})
@file{string.h} (BSD):  @ref{String/Array Comparison,}.
@comment strcat
@item char * strcat (char *@var{to}, const char *@var{from})
@file{string.h} (ANSI):  @ref{Copying and Concatenation,}.
@comment strchr
@item char * strchr (const char *@var{string}, int @var{c})
@file{string.h} (ANSI):  @ref{Search Functions,}.
@comment strcmp
@item int strcmp (const char *@var{s1}, const char *@var{s2})
@file{string.h} (ANSI):  @ref{String/Array Comparison,}.
@comment strcoll
@item int strcoll (const char *@var{s1}, const char *@var{s2})
@file{string.h} (ANSI):  @ref{Collation Functions,}.
@comment strcpy
@item char * strcpy (char *@var{to}, const char *@var{from})
@file{string.h} (ANSI):  @ref{Copying and Concatenation,}.
@comment strcspn
@item size_t strcspn (const char *@var{string}, const char *@var{stopset})
@file{string.h} (ANSI):  @ref{Search Functions,}.
@comment strdup
@item char * strdup (const char *@var{s})
@file{string.h} (SVID):  @ref{Copying and Concatenation,}.
@comment STREAM_MAX
@item int STREAM_MAX
@file{limits.h} (POSIX.1):  @ref{General Limits}.
@comment strerror
@item char * strerror (int @var{errnum})
@file{string.h} (ANSI):  @ref{Error Messages,}.
@comment strftime
@item size_t strftime (char *@var{s}, size_t @var{size}, const char *@var{template}, const struct tm *@var{brokentime})
@file{time.h} (ANSI):  @ref{Formatting Date and Time}.
@comment strlen
@item size_t strlen (const char *@var{s})
@file{string.h} (ANSI):  @ref{String Length,}.
@comment strncasecmp
@item int strncasecmp (const char *@var{s1}, const char *@var{s2}, size_t @var{n})
@file{string.h} (BSD):  @ref{String/Array Comparison,}.
@comment strncat
@item char * strncat (char *@var{to}, const char *@var{from}, size_t @var{size})
@file{string.h} (ANSI):  @ref{Copying and Concatenation,}.
@comment strncmp
@item int strncmp (const char *@var{s1}, const char *@var{s2}, size_t @var{size})
@file{string.h} (ANSI):  @ref{String/Array Comparison,}.
@comment strncpy
@item char * strncpy (char *@var{to}, const char *@var{from}, size_t @var{size})
@file{string.h} (ANSI):  @ref{Copying and Concatenation,}.
@comment strpbrk
@item char * strpbrk (const char *@var{string}, const char *@var{stopset})
@file{string.h} (ANSI):  @ref{Search Functions,}.
@comment strrchr
@item char * strrchr (const char *@var{string}, int @var{c})
@file{string.h} (ANSI):  @ref{Search Functions,}.
@comment strsignal
@item char * strsignal (int @var{signum})
@file{string.h} (GNU):  @ref{Signal Messages}.
@comment strspn
@item size_t strspn (const char *@var{string}, const char *@var{skipset})
@file{string.h} (ANSI):  @ref{Search Functions,}.
@comment strstr
@item char * strstr (const char *@var{haystack}, const char *@var{needle})
@file{string.h} (ANSI):  @ref{Search Functions,}.
@comment strtod
@item double strtod (const char *@var{string}, char **@var{tailptr})
@file{stdlib.h} (ANSI):  @ref{Parsing of Floats}.
@comment strtok
@item char * strtok (char *@var{newstring}, const char *@var{delimiters})
@file{string.h} (ANSI):  @ref{Finding Tokens in a String,}.
@comment strtol
@item long int strtol (const char *@var{string}, char **@var{tailptr}, int @var{base})
@file{stdlib.h} (ANSI):  @ref{Parsing of Integers}.
@comment strtoul
@item unsigned long int strtoul (const char *@var{string}, char **@var{tailptr}, int @var{base})
@file{stdlib.h} (ANSI):  @ref{Parsing of Integers}.
@comment struct dirent
@item struct dirent
@file{dirent.h} (POSIX.1):  @ref{Directory Entries}.
@comment struct flock
@item struct flock
@file{fcntl.h} (POSIX.1):  @ref{File Locks}.
@comment struct group
@item struct group
@file{grp.h} (POSIX.1):  @ref{Group Data Structure}.
@comment struct hostent
@item struct hostent
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment struct in_addr
@item struct in_addr
@file{netinet/in.h} (BSD):  @ref{Host Address Data Type}.
@comment struct itimerval
@item struct itimerval
@file{sys/time.h} (BSD):  @ref{Setting an Alarm}.
@comment struct lconv
@item struct lconv
@file{locale.h} (ANSI):  @ref{Numeric Formatting,}.
@comment struct linger
@item struct linger
@file{sys/socket.h} (BSD):  @ref{Socket-Level Options}.
@comment struct msghdr
@item struct msghdr
@file{sys/socket.h} (BSD):  @ref{Receiving Datagrams}.
@comment struct mstats
@item struct mstats
@file{malloc.h} (GNU):  @ref{Statistics of Malloc}.
@comment struct netent
@item struct netent
@file{netdb.h} (BSD):  @ref{Networks Database}.
@comment struct obstack
@item struct obstack
@file{obstack.h} (GNU):  @ref{Creating Obstacks}.
@comment struct option
@item struct option
@file{getopt.h} (GNU):  @ref{Long Options}.
@comment struct passwd
@item struct passwd
@file{pwd.h} (POSIX.1):  @ref{User Data Structure}.
@comment struct printf_info
@item struct printf_info
@file{printf.h} (GNU):  @ref{Conversion Specifier Options}.
@comment struct protoent
@item struct protoent
@file{netdb.h} (BSD):  @ref{Protocols Database}.
@comment struct rlimit
@item struct rlimit
@file{sys/resource.h} (BSD):  @ref{Limits on Resources}.
@comment struct rusage
@item struct rusage
@file{sys/resource.h} (BSD):  @ref{Resource Usage}.
@comment struct servent
@item struct servent
@file{netdb.h} (BSD):  @ref{Services Database}.
@comment struct sigaction
@item struct sigaction
@file{signal.h} (POSIX.1):  @ref{Advanced Signal Handling}.
@comment struct sigaltstack
@item struct sigaltstack
@file{signal.h} (BSD):  @ref{Signal Stack}.
@comment struct sigstack
@item struct sigstack
@file{signal.h} (BSD):  @ref{Signal Stack}.
@comment struct sigvec
@item struct sigvec
@file{signal.h} (BSD):  @ref{BSD Handler}.
@comment struct sockaddr
@item struct sockaddr
@file{sys/socket.h} (BSD):  @ref{Address Formats}.
@comment struct sockaddr_in
@item struct sockaddr_in
@file{netinet/in.h} (BSD):  @ref{Internet Address Format}.
@comment struct sockaddr_un
@item struct sockaddr_un
@file{sys/un.h} (BSD):  @ref{File Namespace Details}.
@comment struct stat
@item struct stat
@file{sys/stat.h} (POSIX.1):  @ref{Attribute Meanings}.
@comment struct termios
@item struct termios
@file{termios.h} (POSIX.1):  @ref{Mode Data Types}.
@comment struct timeval
@item struct timeval
@file{sys/time.h} (BSD):  @ref{High-Resolution Calendar}.
@comment struct timezone
@item struct timezone
@file{sys/time.h} (BSD):  @ref{High-Resolution Calendar}.
@comment struct tm
@item struct tm
@file{time.h} (ANSI):  @ref{Broken-down Time}.
@comment struct tms
@item struct tms
@file{sys/times.h} (POSIX.1):  @ref{Detailed CPU Time}.
@comment struct utimbuf
@item struct utimbuf
@file{time.h} (POSIX.1):  @ref{File Times}.
@comment struct utsname
@item struct utsname
@file{sys/utsname.h} (POSIX.1):  @ref{Hardware/Software Type ID}.
@comment strxfrm
@item size_t strxfrm (char *@var{to}, const char *@var{from}, size_t @var{size})
@file{string.h} (ANSI):  @ref{Collation Functions,}.
@comment _SVID_SOURCE
@item _SVID_SOURCE
(GNU):  @ref{Feature Test Macros,}.
@comment SV_INTERRUPT
@item int SV_INTERRUPT
@file{signal.h} (BSD):  @ref{BSD Handler}.
@comment SV_ONSTACK
@item int SV_ONSTACK
@file{signal.h} (BSD):  @ref{BSD Handler}.
@comment SV_RESETHAND
@item int SV_RESETHAND
@file{signal.h} (Sun):  @ref{BSD Handler}.
@comment symlink
@item int symlink (const char *@var{oldname}, const char *@var{newname})
@file{unistd.h} (BSD):  @ref{Symbolic Links}.
@comment sysconf
@item long int sysconf (int @var{parameter})
@file{unistd.h} (POSIX.1):  @ref{Sysconf Definition}.
@comment system
@item int system (const char *@var{command})
@file{stdlib.h} (ANSI):  @ref{Running a Command}.
@comment tanh
@item double tanh (double @var{x})
@file{math.h} (ANSI):  @ref{Hyperbolic Functions}.
@comment tan
@item double tan (double @var{x})
@file{math.h} (ANSI):  @ref{Trig Functions}.
@comment tcdrain
@item int tcdrain (int @var{filedes})
@file{termios.h} (POSIX.1):  @ref{Line Control}.
@comment tcflag_t
@item tcflag_t
@file{termios.h} (POSIX.1):  @ref{Mode Data Types}.
@comment tcflow
@item int tcflow (int @var{filedes}, int @var{action})
@file{termios.h} (POSIX.1):  @ref{Line Control}.
@comment tcflush
@item int tcflush (int @var{filedes}, int @var{queue})
@file{termios.h} (POSIX.1):  @ref{Line Control}.
@comment tcgetattr
@item int tcgetattr (int @var{filedes}, struct termios *@var{termios_p})
@file{termios.h} (POSIX.1):  @ref{Mode Functions}.
@comment tcgetpgrp
@item pid_t tcgetpgrp (int @var{filedes})
@file{unistd.h} (POSIX.1):  @ref{Terminal Access Functions,}.
@comment TCSADRAIN
@item TCSADRAIN
@file{termios.h} (POSIX.1):  @ref{Mode Functions}.
@comment TCSAFLUSH
@item TCSAFLUSH
@file{termios.h} (POSIX.1):  @ref{Mode Functions}.
@comment TCSANOW
@item TCSANOW
@file{termios.h} (POSIX.1):  @ref{Mode Functions}.
@comment TCSASOFT
@item TCSASOFT
@file{termios.h} (BSD):  @ref{Mode Functions}.
@comment tcsendbreak
@item int tcsendbreak (int @var{filedes}, int @var{duration})
@file{termios.h} (POSIX.1):  @ref{Line Control}.
@comment tcsetattr
@item int tcsetattr (int @var{filedes}, int @var{when}, const struct termios *@var{termios_p})
@file{termios.h} (POSIX.1):  @ref{Mode Functions}.
@comment tcsetpgrp
@item int tcsetpgrp (int @var{filedes}, pid_t @var{pgid})
@file{unistd.h} (POSIX.1):  @ref{Terminal Access Functions,}.
@comment telldir
@item off_t telldir (DIR *@var{dirstream})
@file{dirent.h} (BSD):  @ref{Random Access Directory}.
@comment TEMP_FAILURE_RETRY
@item TEMP_FAILURE_RETRY (@var{expression})
@file{unistd.h} (GNU):  @ref{Interrupted Primitives}.
@comment tempnam
@item char * tempnam (const char *@var{dir}, const char *@var{prefix})
@file{stdio.h} (SVID):  @ref{Temporary Files}.
@c This file is generated by summary.awk from the Texinfo sources.
@comment time
@item time_t time (time_t *@var{result})
@file{time.h} (ANSI):  @ref{Simple Calendar Time}.
@comment times
@item clock_t times (struct tms *@var{buffer})
@file{sys/times.h} (POSIX.1):  @ref{Detailed CPU Time}.
@comment time_t
@item time_t
@file{time.h} (ANSI):  @ref{Simple Calendar Time}.
@comment timezone
@item long int timezone
@file{time.h} (SVID):  @ref{Time Zone Functions}.
@comment tmpfile
@item FILE * tmpfile (void)
@file{stdio.h} (ANSI):  @ref{Temporary Files}.
@comment TMP_MAX
@item int TMP_MAX
@file{stdio.h} (ANSI):  @ref{Temporary Files}.
@comment tmpnam
@item char * tmpnam (char *@var{result})
@file{stdio.h} (ANSI):  @ref{Temporary Files}.
@comment toascii
@item int toascii (int @var{c})
@file{ctype.h} (SVID, BSD):  @ref{Case Conversion,}.
@comment tolower
@item int tolower (int @var{c})
@file{ctype.h} (ANSI):  @ref{Case Conversion,}.
@comment _tolower
@item int _tolower (int @var{c})
@file{ctype.h} (SVID):  @ref{Case Conversion,}.
@comment TOSTOP
@item TOSTOP
@file{termios.h} (POSIX.1):  @ref{Local Modes}.
@comment toupper
@item int toupper (int @var{c})
@file{ctype.h} (ANSI):  @ref{Case Conversion,}.
@comment _toupper
@item int _toupper (int @var{c})
@file{ctype.h} (SVID):  @ref{Case Conversion,}.
@comment TRY_AGAIN
@item TRY_AGAIN
@file{netdb.h} (BSD):  @ref{Host Names}.
@comment ttyname
@item char * ttyname (int @var{filedes})
@file{unistd.h} (POSIX.1):  @ref{Is It a Terminal}.
@comment TZNAME_MAX
@item int TZNAME_MAX
@file{limits.h} (POSIX.1):  @ref{General Limits}.
@comment tzset
@item void tzset (void)
@file{time.h} (POSIX.1):  @ref{Time Zone Functions}.
@comment UCHAR_MAX
@item UCHAR_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment uid_t
@item uid_t
@file{sys/types.h} (POSIX.1):  @ref{Reading Persona}.
@comment UINT_MAX
@item UINT_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment ULONG_LONG_MAX
@item ULONG_LONG_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment ULONG_MAX
@item ULONG_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment umask
@item mode_t umask (mode_t @var{mask})
@file{sys/stat.h} (POSIX.1):  @ref{Setting Permissions}.
@comment uname
@item int uname (struct utsname *@var{info})
@file{sys/utsname.h} (POSIX.1):  @ref{Hardware/Software Type ID}.
@comment ungetc
@item int ungetc (int @var{c}, FILE *@var{stream})
@file{stdio.h} (ANSI):  @ref{How Unread}.
@comment union wait
@item union wait
@file{sys/wait.h} (BSD):  @ref{BSD Wait Functions}.
@comment unlink
@item int unlink (const char *@var{filename})
@file{unistd.h} (POSIX.1):  @ref{Deleting Files}.
@comment USHRT_MAX
@item USHRT_MAX
@file{limits.h} (ANSI):  @ref{Range of Type}.
@comment utime
@item int utime (const char *@var{filename}, const struct utimbuf *@var{times})
@file{time.h} (POSIX.1):  @ref{File Times}.
@comment utimes
@item int utimes (const char *@var{filename}, struct timeval @var{tvp}@t{[2]})
@file{sys/time.h} (BSD):  @ref{File Times}.
@comment va_alist
@item va_alist
@file{varargs.h} (Unix):  @ref{Old Varargs}.
@comment va_arg
@item @var{type} va_arg (va_list @var{ap}, @var{type})
@file{stdarg.h} (ANSI):  @ref{Argument Macros}.
@comment va_dcl
@item va_dcl
@file{varargs.h} (Unix):  @ref{Old Varargs}.
@comment va_end
@item void va_end (va_list @var{ap})
@file{stdarg.h} (ANSI):  @ref{Argument Macros}.
@comment va_list
@item va_list
@file{stdarg.h} (ANSI):  @ref{Argument Macros}.
@comment valloc
@item void * valloc (size_t @var{size})
@file{malloc.h}, @file{stdlib.h} (BSD):  @ref{Aligned Memory Blocks}.
@comment vasprintf
@item int vasprintf (char **@var{ptr}, const char *@var{template}, va_list @var{ap})
@file{stdio.h} (GNU):  @ref{Variable Arguments Output}.
@comment va_start
@item void va_start (va_list @var{ap})
@file{varargs.h} (Unix):  @ref{Old Varargs}.
@comment va_start
@item void va_start (va_list @var{ap}, @var{last_required})
@file{stdarg.h} (ANSI):  @ref{Argument Macros}.
@comment VDISCARD
@item int VDISCARD
@file{termios.h} (BSD):  @ref{Other Special}.
@comment VDSUSP
@item int VDSUSP
@file{termios.h} (BSD):  @ref{Signal Characters}.
@comment VEOF
@item int VEOF
@file{termios.h} (POSIX.1):  @ref{Editing Characters}.
@comment VEOL2
@item int VEOL2
@file{termios.h} (BSD):  @ref{BSD Editing}.
@comment VEOL
@item int VEOL
@file{termios.h} (POSIX.1):  @ref{Editing Characters}.
@comment VERASE
@item int VERASE
@file{termios.h} (POSIX.1):  @ref{Editing Characters}.
@comment vfork
@item pid_t vfork (void)
@file{unistd.h} (BSD):  @ref{Creating a Process}.
@comment vfprintf
@item int vfprintf (FILE *@var{stream}, const char *@var{template}, va_list @var{ap})
@file{stdio.h} (ANSI):  @ref{Variable Arguments Output}.
@comment vfscanf
@item int vfscanf (FILE *@var{stream}, const char *@var{template}, va_list @var{ap})
@file{stdio.h} (GNU):  @ref{Variable Arguments Input}.
@comment VINTR
@item int VINTR
@file{termios.h} (POSIX.1):  @ref{Signal Characters}.
@comment VKILL
@item int VKILL
@file{termios.h} (POSIX.1):  @ref{Editing Characters}.
@comment VLNEXT
@item int VLNEXT
@file{termios.h} (BSD):  @ref{BSD Editing}.
@comment VMIN
@item int VMIN
@file{termios.h} (POSIX.1):  @ref{Noncanonical Input}.
@comment vprintf
@item int vprintf (const char *@var{template}, va_list @var{ap})
@file{stdio.h} (ANSI):  @ref{Variable Arguments Output}.
@comment VQUIT
@item int VQUIT
@file{termios.h} (POSIX.1):  @ref{Signal Characters}.
@comment VREPRINT
@item int VREPRINT
@file{termios.h} (BSD):  @ref{BSD Editing}.
@comment vscanf
@item int vscanf (const char *@var{template}, va_list @var{ap})
@file{stdio.h} (GNU):  @ref{Variable Arguments Input}.
@comment vsnprintf
@item int vsnprintf (char *@var{s}, size_t @var{size}, const char *@var{template}, va_list @var{ap})
@file{stdio.h} (GNU):  @ref{Variable Arguments Output}.
@comment vsprintf
@item int vsprintf (char *@var{s}, const char *@var{template}, va_list @var{ap})
@file{stdio.h} (ANSI):  @ref{Variable Arguments Output}.
@comment vsscanf
@item int vsscanf (const char *@var{s}, const char *@var{template}, va_list @var{ap})
@file{stdio.h} (GNU):  @ref{Variable Arguments Input}.
@comment VSTART
@item int VSTART
@file{termios.h} (POSIX.1):  @ref{Start/Stop Characters}.
@comment VSTATUS
@item int VSTATUS
@file{termios.h} (BSD):  @ref{Other Special}.
@comment VSTOP
@item int VSTOP
@file{termios.h} (POSIX.1):  @ref{Start/Stop Characters}.
@comment VSUSP
@item int VSUSP
@file{termios.h} (POSIX.1):  @ref{Signal Characters}.
@comment VTIME
@item int VTIME
@file{termios.h} (POSIX.1):  @ref{Noncanonical Input}.
@comment VWERASE
@item int VWERASE
@file{termios.h} (BSD):  @ref{BSD Editing}.
@comment wait3
@item pid_t wait3 (union wait *@var{status_ptr}, int @var{options}, struct rusage *@var{usage})
@file{sys/wait.h} (BSD):  @ref{BSD Wait Functions}.
@comment wait4
@item pid_t wait4 (pid_t @var{pid}, union wait *@var{status_ptr}, int @var{options}, struct rusage *@var{usage})
@file{sys/wait.h} (BSD):  @ref{BSD Wait Functions}.
@comment wait
@item pid_t wait (int *@var{status_ptr})
@file{sys/wait.h} (POSIX.1):  @ref{Process Completion}.
@comment waitpid
@item pid_t waitpid (pid_t @var{pid}, int *@var{status_ptr}, int @var{options})
@file{sys/wait.h} (POSIX.1):  @ref{Process Completion}.
@comment WCHAR_MAX
@item WCHAR_MAX
@file{limits.h} (GNU):  @ref{Range of Type}.
@comment wchar_t
@item wchar_t
@file{stddef.h} (ANSI):  @ref{Wide Char Intro,}.
@comment WCOREDUMP
@item int WCOREDUMP (int @var{status})
@file{sys/wait.h} (BSD):  @ref{Process Completion Status}.
@comment wcstombs
@item size_t wcstombs (char *@var{string}, const wchar_t @var{wstring}, size_t @var{size})
@file{stdlib.h} (ANSI):  @ref{Wide String Conversion,}.
@comment wctomb
@item int wctomb (char *@var{string}, wchar_t @var{wchar})
@file{stdlib.h} (ANSI):  @ref{Converting One Char,}.
@comment WEXITSTATUS
@item int WEXITSTATUS (int @var{status})
@file{sys/wait.h} (POSIX.1):  @ref{Process Completion Status}.
@comment WIFEXITED
@item int WIFEXITED (int @var{status})
@file{sys/wait.h} (POSIX.1):  @ref{Process Completion Status}.
@comment WIFSIGNALED
@item int WIFSIGNALED (int @var{status})
@file{sys/wait.h} (POSIX.1):  @ref{Process Completion Status}.
@comment WIFSTOPPED
@item int WIFSTOPPED (int @var{status})
@file{sys/wait.h} (POSIX.1):  @ref{Process Completion Status}.
@comment W_OK
@item int W_OK
@file{unistd.h} (POSIX.1):  @ref{Testing File Access}.
@comment wordexp
@item int wordexp (const char *@var{words}, wordexp_t *@var{word-vector-ptr}, int @var{flags})
@file{wordexp.h} (POSIX.2):  @ref{Calling Wordexp}.
@comment wordexp_t
@item wordexp_t
@file{wordexp.h} (POSIX.2):  @ref{Calling Wordexp}.
@comment wordfree
@item void wordfree (wordexp_t *@var{word-vector-ptr})
@file{wordexp.h} (POSIX.2):  @ref{Calling Wordexp}.
@comment WRDE_APPEND
@item WRDE_APPEND
@file{wordexp.h} (POSIX.2):  @ref{Flags for Wordexp}.
@comment WRDE_BADCHAR
@item WRDE_BADCHAR
@file{wordexp.h} (POSIX.2):  @ref{Calling Wordexp}.
@comment WRDE_BADVAL
@item WRDE_BADVAL
@file{wordexp.h} (POSIX.2):  @ref{Calling Wordexp}.
@comment WRDE_CMDSUB
@item WRDE_CMDSUB
@file{wordexp.h} (POSIX.2):  @ref{Calling Wordexp}.
@comment WRDE_DOOFFS
@item WRDE_DOOFFS
@file{wordexp.h} (POSIX.2):  @ref{Flags for Wordexp}.
@comment WRDE_NOCMD
@item WRDE_NOCMD
@file{wordexp.h} (POSIX.2):  @ref{Flags for Wordexp}.
@comment WRDE_NOSPACE
@item WRDE_NOSPACE
@file{wordexp.h} (POSIX.2):  @ref{Calling Wordexp}.
@comment WRDE_REUSE
@item WRDE_REUSE
@file{wordexp.h} (POSIX.2):  @ref{Flags for Wordexp}.
@comment WRDE_SHOWERR
@item WRDE_SHOWERR
@file{wordexp.h} (POSIX.2):  @ref{Flags for Wordexp}.
@comment WRDE_SYNTAX
@item WRDE_SYNTAX
@file{wordexp.h} (POSIX.2):  @ref{Calling Wordexp}.
@comment WRDE_UNDEF
@item WRDE_UNDEF
@file{wordexp.h} (POSIX.2):  @ref{Flags for Wordexp}.
@comment write
@item ssize_t write (int @var{filedes}, const void *@var{buffer}, size_t @var{size})
@file{unistd.h} (POSIX.1):  @ref{I/O Primitives}.
@comment WSTOPSIG
@item int WSTOPSIG (int @var{status})
@file{sys/wait.h} (POSIX.1):  @ref{Process Completion Status}.
@comment WTERMSIG
@item int WTERMSIG (int @var{status})
@file{sys/wait.h} (POSIX.1):  @ref{Process Completion Status}.
@comment X_OK
@item int X_OK
@file{unistd.h} (POSIX.1):  @ref{Testing File Access}.