STATFS(2) 1990 STATFS(2) NNAAMMEE statfs - get file system statistics SSYYNNOOPPSSIISS ##iinncclluuddee <<ssyyss//ttyyppeess..hh>> ##iinncclluuddee <<ssyyss//mmoouunntt..hh>> ssttaattffss((ppaatthh,, bbuuff)) cchhaarr **ppaatthh;; ssttrruucctt ssttaattffss **bbuuff;; ffssttaattffss((ffdd,, bbuuff)) iinntt ffdd;; ssttrruucctt ssttaattffss **bbuuff;; DDEESSCCRRIIPPTTIIOONN _S_t_a_t_f_s 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 _s_t_a_t_f_s 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_fsize; /* fundamental file system block size */ long f_bsize; /* 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]; /* directory on which mounted */ 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. _F_s_t_a_t_f_s returns the same information about an open file referenced by descriptor _f_d. Printed 7/27/90 June 1 STATFS(2) 1990 STATFS(2) RREETTUURRNN VVAALLUUEE Upon successful completion, a value of 0 is returned. Oth- erwise, -1 is returned and the global variable _e_r_r_n_o is set to indicate the error. EERRRROORRSS _S_t_a_t_f_s 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. _F_s_t_a_t_f_s 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. Printed 7/27/90 June 2