statvfs(5)

statvfs -- data returned by statvfs and statvfs64 system calls

Synopsis

   #include <sys/types.h>
   #include <sys/statvfs.h>

Description

The statvfs.h header defines the statvfs structure, in which the system calls statvfs and fstatvfs return data, and the statvfs64 structure, in which the system calls statvfs64, and fstatvfs64 return data. They include the following members:

   unsigned long	f_bsize;		/ fundamental file system block size /
   unsigned long	f_frsize;		/ fragment size /
   unsigned long	f_blocks;		/ total # of blocks of f__frsize on file system /
   fsblkcnt_t	f_bfree; +	/ total # of free blocks of f_frsize /
   fsblkcnt_t	f_bavail; +	/ total # of free blocks avail to non-superuser /
   fsfilcnt_t	f_files; +	/ total # of file nodes (inodes) /
   fsfilcnt_t	f_ffree; +	/ total # of free file nodes /
   fsfilcnt_t	f_favail; +	/ # of free nodes avail to non-superuser/
   unsigned long	f_fsid;		/ file system id (dev for now) /
   char		f_basetype[FSTYPSZ]; / target fs type name, null-terminated /
   unsigned long	f_flag;		/ bit mask of flags /
   unsigned long	f_namemax;	/ maximum file name length /
   char		f_fstr[32];	/ file system specific string /
   int		st_aclcnt;	/ number of ACL entries (default is 4) /
   level_t		st_level;		/ security level identifier (MAC) /

+: This data type is a 32 bit/64 bit switchable data type. See ``Large File Support'' on intro(2) for information on Large File Support (LFS).

f_basetype contains a null-terminated FSType name of the mounted target (for example, s5 mounted over NFS will contain nfs).

The following flags can be returned in the ``f_flag'' field:

   ST_RDONLY	0x01	/ read-only file system /
   ST_NOSUID	0x02	/ does not support setuid/setgid semantics /
   ST_NOTRUNC	0x04	/ does not truncate file names longer /
   	         	/ than {NAME_MAX}/

References

statvfs(2), statvfs64(2), types(5)