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-
- GETFSSTAT(2) UNIX Programmer's Manual GETFSSTAT(2)
-
- NNAAMMEE
- ggeettffssssttaatt - get list of all mounted file systems
-
- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<ssyyss//ppaarraamm..hh>>
- ##iinncclluuddee <<ssyyss//uuccrreedd..hh>>
- ##iinncclluuddee <<ssyyss//mmoouunntt..hh>>
-
- _i_n_t
- ggeettffssssttaatt(_s_t_r_u_c_t _s_t_a_t_f_s _*_b_u_f, _l_o_n_g _b_u_f_s_i_z_e, _i_n_t _f_l_a_g_s)
-
- DDEESSCCRRIIPPTTIIOONN
- GGeettffssssttaatt() returns information about all mounted file systems. _B_u_f is a
- pointer to statfs structures 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.
- The buffer is filled with an array of _s_t_a_t_f_s structures, one for each
- mounted file system up to the size specified by _b_u_f_s_i_z_e.
-
- If _b_u_f is given as NULL, ggeettffssssttaatt() returns just the number of mounted
- file systems.
-
- Normally _f_l_a_g_s should be specified as MNT_WAIT. If _f_l_a_g_s is set to
- MNT_NOWAIT, ggeettffssssttaatt() will return the information it has available
- without requesting an update from each file system. Thus, some of the
- information will be out of date, but ggeettffssssttaatt() will not block waiting
- for information from a file system that is unable to respond.
-
- RREETTUURRNN VVAALLUUEESS
- Upon successful completion, the number of _s_t_a_t_f_s structures is returned.
- Otherwise, -1 is returned and the global variable _e_r_r_n_o is set to indi-
- cate the error.
-
- EERRRROORRSS
- GGeettffssssttaatt() fails if one or more of the following are true:
-
- [EFAULT] _B_u_f points to an invalid address.
-
- [EIO] An I/O error occurred while reading from or writing to the
- file system.
-
- SSEEEE AALLSSOO
- statfs(2), fstab(5), mount(8)
-
- HHIISSTTOORRYY
- The ggeettffssssttaatt() function first appeared in 4.4BSD.
-
- BSD Experimental June 9, 1993 2
-