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- STATFS(2) UNIX Programmer's Manual STATFS(2)
-
- NNAAMMEE
- ssttaattffss - get file system statistics
-
- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<ssyyss//ppaarraamm..hh>>
- ##iinncclluuddee <<ssyyss//mmoouunntt..hh>>
-
- _i_n_t
- ssttaattffss(_c_o_n_s_t _c_h_a_r _*_p_a_t_h, _s_t_r_u_c_t _s_t_a_t_f_s _*_b_u_f)
-
- _i_n_t
- ffssttaattffss(_i_n_t _f_d, _s_t_r_u_c_t _s_t_a_t_f_s _*_b_u_f)
-
- DDEESSCCRRIIPPTTIIOONN
- SSttaattffss() returns information about a mounted file system. _P_a_t_h is the
- path name of any file within the mounted file system. _B_u_f is a pointer
- to a ssttaattffss() structure defined as follows:
-
- typedef struct { int32_t val[2]; } fsid_t;
-
- #define MFSNAMELEN 16 /* length of fs type name, including nul */
- #define MNAMELEN 32 /* length of buffer for returned name */
-
- struct statfs {
- short f_type; /* type of file system (unused; zero) */
- short f_flags; /* copy of mount flags */
- long f_bsize; /* fundamental file system block size */
- long f_iosize; /* optimal transfer block size */
- long f_blocks; /* total data blocks in file system */
- long f_bfree; /* free blocks in fs */
- long f_bavail; /* free blocks avail to non-superuser */
- long f_files; /* total file nodes in file system */
- long f_ffree; /* free file nodes in fs */
- fsid_t f_fsid; /* file system id */
- uid_t f_owner; /* user that mounted the file system */
- long f_spare[4]; /* spare for later */
- char f_fstypename[MFSNAMELEN]; /* fs type name */
- char f_mntonname[MNAMELEN]; /* directory on which mounted */
- char f_mntfromname[MNAMELEN]; /* mounted file system */
- };
-
- Fields that are undefined for a particular file system are set to -1.
- FFssttaattffss() returns the same information about an open file referenced by
- descriptor _f_d.
-
- RREETTUURRNN VVAALLUUEESS
- Upon successful completion, a value of 0 is returned. Otherwise, -1 is
- returned and the global variable _e_r_r_n_o is set to indicate the error.
-
- EERRRROORRSS
- SSttaattffss() fails if one or more of the following are true:
-
- [ENOTDIR] A component of the path prefix of _P_a_t_h is not a directory.
-
- [ENAMETOOLONG]
- The length of a component of _p_a_t_h exceeds {NAME_MAX} char-
- acters, or the length of _p_a_t_h exceeds {PATH_MAX} charac-
- ters.
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- [ENOENT] The file referred to by _p_a_t_h does not exist.
-
- [EACCES] Search permission is denied for a component of the path
-
- prefix of _p_a_t_h.
-
- [ELOOP] Too many symbolic links were encountered in translating
- _p_a_t_h.
-
- [EFAULT] _B_u_f or _p_a_t_h points to an invalid address.
-
- [EIO] An I/O error occurred while reading from or writing to the
- file system.
-
- FFssttaattffss() fails if one or more of the following are true:
-
- [EBADF] _F_d is not a valid open file descriptor.
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- [EFAULT] _B_u_f points to an invalid address.
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- [EIO] An I/O error occurred while reading from or writing to the
- file system.
-
- HHIISSTTOORRYY
- The ssttaattffss() function first appeared in 4.4BSD.
-
- BSD Experimental February 11, 1994 2
-