The <sys/statvfs.h> header defines the statvfs structure, which includes the following members:
unsigned long f_bsize /* file system block size */ unsigned long f_frsize /* fundamental file system block size */ fsblkcnt_t f_blocks /* total number of blocks on file system in units of f_frsize */ fsblkcnt_t f_bfree /* total number of free blocks */ fsblkcnt_t f_bavail /* number of free blocks available to non-privileged process */ fsfilcnt_t f_files /* total number of file serial numbers */ fsfilcnt_t f_ffree /* total number of free file serial numbers */ fsfilcnt_t f_favail /* number of file serial numbers available to non-privileged unsigned long f_fsid /* process file system ID */ unsigned long f_flag /* bit mask of f_flag values */ unsigned long f_namemax /* maximum filename length */
The fsblkcnt_t and fsfilcnt_t types are defined as described in <sys/types.h>. See types.h(3HEAD).
The following flags for the f_flag member are defined:
read-only file system
does not support setuid()/setgid() semantics
See attributes(5) for descriptions of the following attributes: