STATFS(2) BSD 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 filesystem. _B_u_f is a pointer to a ssttaattffss() structure defined as follows: typedef quad fsid_t; #define MNAMELEN 32 /* length of buffer for returned name */ struct statfs { short f_type; /* type of filesystem (see below) */ 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 */ long f_spare[6]; /* spare for later */ char f_mntonname[MNAMELEN]; /* mount point */ char f_mntfromname[MNAMELEN]; /* mounted filesystem */ }; /* * File system types. */ #define MOUNT_UFS 1 #define MOUNT_NFS 2 #define MOUNT_MFS 3 #define MOUNT_PC 4 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. [EINVAL] _p_a_t_h contains a character with the high-order bit set. [ENAMETOOLONG] The length of a component of _p_a_t_h exceeds 255 characters, or the length of _p_a_t_h exceeds 1023 characters. [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 both of the following are true: [EBADF] _F_d is not a valid open file descriptor. [EFAULT] _B_u_f points to an invalid address. [EIO] An I/O error occurred while reading from or writing to the file system. HHIISSTTOORRYY The ssttaattffss function first appeared in 4.4BSD. 4.4BSD June 9, 1993 2