home *** CD-ROM | disk | FTP | other *** search
-
- PATHCONF(2) UNIX Programmer's Manual PATHCONF(2)
-
- NNAAMMEE
- ppaatthhccoonnff, ffppaatthhccoonnff - get configurable pathname variables
-
- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<uunniissttdd..hh>>
-
- _l_o_n_g
- ppaatthhccoonnff(_c_o_n_s_t _c_h_a_r _*_p_a_t_h, _i_n_t _n_a_m_e)
-
- _l_o_n_g
- ffppaatthhccoonnff(_i_n_t _f_d, _i_n_t _n_a_m_e)
-
- DDEESSCCRRIIPPTTIIOONN
- The ppaatthhccoonnff() and ffppaatthhccoonnff() functions provides a method for applica-
- tions to determine the current value of a configurable system limit or
- option variable associated with a pathname or file descriptor.
-
- For ppaatthhccoonnff, the _p_a_t_h argument is the name of a file or directory. For
- ffppaatthhccoonnff, the _f_d argument is an open file descriptor. The _n_a_m_e argument
- specifies the system variable to be queried. Symbolic constants for each
- name value are found in the include file <unistd.h>.
-
- The available values are as follows:
-
- _PC_LINK_MAX
- The maximum file link count.
-
- _PC_MAX_CANON
- The maximum number of bytes in terminal canonical input line.
-
- _PC_MAX_INPUT
- The minimum maximum number of bytes for which space is available
- in a terminal input queue.
-
- _PC_NAME_MAX
- The maximum number of bytes in a file name.
-
- _PC_PATH_MAX
- The maximum number of bytes in a pathname.
-
- _PC_PIPE_BUF
- The maximum number of bytes which will be written atomically to a
- pipe.
-
- _PC_CHOWN_RESTRICTED
- Return 1 if appropriate privileges are required for the chown(2)
- system call, otherwise 0.
-
- _PC_NO_TRUNC
- Return 1 if file names longer than KERN_NAME_MAX are truncated.
-
- _PC_VDISABLE
- Returns the terminal character disabling value.
-
- RREETTUURRNN VVAALLUUEESS
- If the call to ppaatthhccoonnff or ffppaatthhccoonnff is not successful, -1 is returned
- and _e_r_r_n_o is set appropriately. Otherwise, if the variable is associated
- with functionality that does not have a limit in the system, -1 is re-
- turned and _e_r_r_n_o is not modified. Otherwise, the current variable value
- is returned.
-
- EERRRROORRSS
- If any of the following conditions occur, the ppaatthhccoonnff and ffppaatthhccoonnff
- functions shall return -1 and set _e_r_r_n_o to the corresponding value.
-
- [EINVAL] The value of the _n_a_m_e argument is invalid.
-
- [EINVAL] The implementation does not support an association of the
- variable name with the associated file.
- PPaatthhccoonnff() will fail if:
-
- [ENOTDIR] A component of the path prefix is not a directory.
-
- [ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an
- entire path name exceeded 1023 characters.
-
- [ENOENT] The named file does not exist.
-
- [EACCES] Search permission is denied for a component of the path
- prefix.
-
- [ELOOP] Too many symbolic links were encountered in translating
- the pathname.
-
- [EIO] An I/O error occurred while reading from or writing to
- the file system.
-
- FFppaatthhccoonnff() will fail if:
-
- [EBADF] _f_d is not a valid open file descriptor.
-
- [EIO] An I/O error occurred while reading from or writing to the file
- system.
-
- SSEEEE AALLSSOO
- sysctl(3)
-
- HHIISSTTOORRYY
- The ppaatthhccoonnff and ffppaatthhccoonnff functions first appeared in 4.4BSD.
-
- 4th Berkeley Distribution June 4, 1993 2
-