Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
STATFS(2)		  FreeBSD System Calls Manual		     STATFS(2)

NAME
     statfs -- get file	system statistics

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <sys/param.h>
     #include <sys/mount.h>

     int
     statfs(const char *path, struct statfs *buf);

     int
     fstatfs(int fd, struct statfs *buf);

DESCRIPTION
     The statfs() system call returns information about	a mounted file system.
     The path argument is the path name	of any file within the mounted file
     system.  The buf argument is a pointer to a statfs	structure defined as
     follows:

     typedef struct fsid { int32_t val[2]; } fsid_t; /*	file system id type */

     /*
      *	filesystem statistics
      */

     #define MFSNAMELEN	     16		     /*	length of type name including null */
     #define MNAMELEN	     88		     /*	size of	on/from	name bufs */
     #define STATFS_VERSION  0x20030518	     /*	current	version	number */

     struct statfs {
     uint32_t f_version;	     /*	structure version number */
     uint32_t f_type;		     /*	type of	filesystem */
     uint64_t f_flags;		     /*	copy of	mount exported flags */
     uint64_t f_bsize;		     /*	filesystem fragment size */
     uint64_t f_iosize;		     /*	optimal	transfer block size */
     uint64_t f_blocks;		     /*	total data blocks in filesystem	*/
     uint64_t f_bfree;		     /*	free blocks in filesystem */
     int64_t  f_bavail;		     /*	free blocks avail to non-superuser */
     uint64_t f_files;		     /*	total file nodes in filesystem */
     int64_t  f_ffree;		     /*	free nodes avail to non-superuser */
     uint64_t f_syncwrites;	     /*	count of sync writes since mount */
     uint64_t f_asyncwrites;	     /*	count of async writes since mount */
     uint64_t f_syncreads;	     /*	count of sync reads since mount	*/
     uint64_t f_asyncreads;	     /*	count of async reads since mount */
     uint64_t f_spare[10];	     /*	unused spare */
     uint32_t f_namemax;	     /*	maximum	filename length	*/
     uid_t     f_owner;		     /*	user that mounted the filesystem */
     fsid_t    f_fsid;		     /*	filesystem id */
     char      f_charspare[80];		 /* spare string space */
     char      f_fstypename[MFSNAMELEN]; /* filesystem type name */
     char      f_mntfromname[MNAMELEN];	 /* mounted filesystem */
     char      f_mntonname[MNAMELEN];	 /* directory on which mounted */
     };

     The flags that may	be returned include:

     MNT_RDONLY	      The file system is mounted read-only; Even the super-
		      user may not write on it.

     MNT_NOEXEC	      Files may	not be executed	from the file system.

     MNT_NOSUID	      Setuid and setgid	bits on	files are not honored when
		      they are executed.

     MNT_SYNCHRONOUS  All I/O to the file system is done synchronously.

     MNT_ASYNC	      No file system I/O is done synchronously.

     MNT_SOFTDEP      Soft updates being done (see ffs(7)).

     MNT_GJOURNAL     Journaling with gjournal is enabled (see gjournal(8)).

     MNT_SUIDDIR      Special handling of SUID bit on directories.

     MNT_UNION	      Union with underlying file system.

     MNT_NOSYMFOLLOW  Symbolic links are not followed.

     MNT_NOCLUSTERR   Read clustering is disabled.

     MNT_NOCLUSTERW   Write clustering is disabled.

     MNT_MULTILABEL   Mandatory	Access Control (MAC) support for individual
		      objects (see mac(4)).

     MNT_ACLS	      Access Control List (ACL)	support	enabled.

     MNT_LOCAL	      The file system resides locally.

     MNT_QUOTA	      The file system has quotas enabled on it.

     MNT_ROOTFS	      Identifies the root file system.

     MNT_EXRDONLY     The file system is exported read-only.

     MNT_NOATIME      Updating of file access times is disabled.

     MNT_USER	      The file system has been mounted by a user.

     MNT_EXPORTED     The file system is exported for both reading and writ-
		      ing.

     MNT_DEFEXPORTED  The file system is exported for both reading and writing
		      to any Internet host.

     MNT_EXPORTANON   The file system maps all remote accesses to the anony-
		      mous user.

     MNT_EXKERB	      The file system is exported with Kerberos	uid mapping.

     MNT_EXPUBLIC     The file system is exported publicly (WebNFS).

     Fields that are undefined for a particular	file system are	set to -1.
     The fstatfs() system call returns the same	information about an open file
     referenced	by descriptor fd.

RETURN VALUES
     Upon successful completion, the value 0 is	returned; otherwise the
     value -1 is returned and the global variable errno	is set to indicate the
     error.

ERRORS
     The statfs() system call fails if one or more of the following are	true:

     [ENOTDIR]		A component of the path	prefix of path is not a	direc-
			tory.

     [ENAMETOOLONG]	The length of a	component of path exceeds 255 charac-
			ters, or the length of path exceeds 1023 characters.

     [ENOENT]		The file referred to by	path does not exist.

     [EACCES]		Search permission is denied for	a component of the
			path prefix of path.

     [ELOOP]		Too many symbolic links	were encountered in translat-
			ing path.

     [EFAULT]		The buf	or path	argument points	to an invalid address.

     [EIO]		An I/O error occurred while reading from or writing to
			the file system.

     The fstatfs() system call fails if	one or more of the following are true:

     [EBADF]		The fd argument	is not a valid open file descriptor.

     [EFAULT]		The buf	argument points	to an invalid address.

     [EIO]		An I/O error occurred while reading from or writing to
			the file system.

SEE ALSO
     fhstatfs(2)

HISTORY
     The statfs() system call first appeared in	4.4BSD.

FreeBSD	9.2		       November	1, 2006			   FreeBSD 9.2

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=fstatfs&sektion=2&manpath=FreeBSD+10.0-RELEASE>

home | help