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Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)statfs.2 8.5 (Berkeley) 5/24/95 33.\" $FreeBSD: src/lib/libc/sys/statfs.2,v 1.9.2.7 2001/12/14 18:34:01 ru Exp $ 34.\" $DragonFly: src/lib/libc/sys/statfs.2,v 1.4 2008/09/28 16:33:35 swildner Exp $ 35.\" 36.Dd September 28, 2008 37.Dt STATFS 2 38.Os 39.Sh NAME 40.Nm statfs , 41.Nm fstatfs 42.Nd get file system statistics 43.Sh LIBRARY 44.Lb libc 45.Sh SYNOPSIS 46.In sys/param.h 47.In sys/mount.h 48.Ft int 49.Fn statfs "const char *path" "struct statfs *buf" 50.Ft int 51.Fn fstatfs "int fd" "struct statfs *buf" 52.Sh DESCRIPTION 53.Fn Statfs 54returns information about a mounted file system. 55.Fa Path 56is the path name of any file within the mounted filesystem. 57.Fa Buf 58is a pointer to a 59.Fn statfs 60structure defined as follows: 61.Bd -literal 62typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */ 63 64/* 65 * file system statistics 66 */ 67 68#define MFSNAMELEN 16 /* length of fs type name, including null */ 69#define MNAMELEN 90 /* length of buffer for returned name */ 70 71struct statfs { 72 long f_bsize; /* fundamental file system block size */ 73 long f_iosize; /* optimal transfer block size */ 74 long f_blocks; /* total data blocks in file system */ 75 long f_bfree; /* free blocks in fs */ 76 long f_bavail; /* free blocks avail to non-superuser */ 77 long f_files; /* total file nodes in file system */ 78 long f_ffree; /* free file nodes in fs */ 79 fsid_t f_fsid; /* file system id */ 80 uid_t f_owner; /* user that mounted the filesystem */ 81 int f_type; /* type of filesystem */ 82 int f_flags; /* copy of mount exported flags */ 83 long f_syncwrites; /* count of sync writes since mount */ 84 long f_asyncwrites; /* count of async writes since mount */ 85 char f_fstypename[MFSNAMELEN]; /* fs type name */ 86 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 87 long f_syncreads; /* count of sync reads since mount */ 88 long f_asyncreads; /* count of async reads since mount */ 89 char f_mntfromname[MNAMELEN];/* mounted filesystem */ 90}; 91.Ed 92.Pp 93The flags that may be returned include: 94.Bl -tag -width MNT_SYNCHRONOUS 95.It Dv MNT_RDONLY 96The filesystem is mounted read-only; 97Even the super-user may not write on it. 98.It Dv MNT_NOEXEC 99Files may not be executed from the filesystem. 100.It Dv MNT_NOSUID 101Setuid and setgid bits on files are not honored when they are executed. 102.It Dv MNT_NODEV 103Special files in the filesystem may not be opened. 104.It Dv MNT_SYNCHRONOUS 105All I/O to the filesystem is done synchronously. 106.It Dv MNT_ASYNC 107No filesystem I/O is done synchronously. 108.It Dv MNT_LOCAL 109The filesystem resides locally. 110.It Dv MNT_QUOTA 111The filesystem has quotas enabled on it. 112.It Dv MNT_ROOTFS 113Identifies the root filesystem. 114.It Dv MNT_EXRDONLY 115The filesystem is exported read-only. 116.It Dv MNT_EXPORTED 117The filesystem is exported for both reading and writing. 118.It Dv MNT_DEFEXPORTED 119The filesystem is exported for both reading and writing to any Internet host. 120.It Dv MNT_EXPORTANON 121The filesystem maps all remote accesses to the anonymous user. 122.It Dv MNT_EXKERB 123The filesystem is exported with Kerberos uid mapping. 124.El 125.Pp 126Fields that are undefined for a particular file system are set to -1. 127.Fn Fstatfs 128returns the same information about an open file referenced by descriptor 129.Fa fd . 130.Sh RETURN VALUES 131.Rv -std 132.Sh ERRORS 133.Fn Statfs 134fails if one or more of the following are true: 135.Bl -tag -width Er 136.It Bq Er ENOTDIR 137A component of the path prefix of 138.Fa path 139is not a directory. 140.It Bq Er ENAMETOOLONG 141The length of a component of 142.Fa path 143exceeds 255 characters, 144or the length of 145.Fa path 146exceeds 1023 characters. 147.It Bq Er ENOENT 148The file referred to by 149.Fa path 150does not exist. 151.It Bq Er EACCES 152Search permission is denied for a component of the path prefix of 153.Fa path . 154.It Bq Er ELOOP 155Too many symbolic links were encountered in translating 156.Fa path . 157.It Bq Er EFAULT 158.Fa Buf 159or 160.Fa path 161points to an invalid address. 162.It Bq Er EIO 163An 164.Tn I/O 165error occurred while reading from or writing to the file system. 166.El 167.Pp 168.Fn Fstatfs 169fails if one or more of the following are true: 170.Bl -tag -width Er 171.It Bq Er EBADF 172.Fa fd 173is not a valid open file descriptor. 174.It Bq Er EFAULT 175.Fa Buf 176points to an invalid address. 177.It Bq Er EIO 178An 179.Tn I/O 180error occurred while reading from or writing to the file system. 181.El 182.Sh SEE ALSO 183.Xr stat 2 , 184.Xr statvfs 2 185.Sh HISTORY 186The 187.Fn statfs 188function first appeared in 189.Bx 4.4 . 190