1.\" Copyright (c) 1989, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. 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.\" $FreeBSD$ 34.\" 35.Dd November 26, 2004 36.Dt STATFS 2 37.Os 38.Sh NAME 39.Nm statfs 40.Nd get file system statistics 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In sys/param.h 45.In sys/mount.h 46.Ft int 47.Fn statfs "const char *path" "struct statfs *buf" 48.Ft int 49.Fn fstatfs "int fd" "struct statfs *buf" 50.Sh DESCRIPTION 51The 52.Fn statfs 53system call 54returns information about a mounted file system. 55The 56.Fa path 57argument 58is the path name of any file within the mounted file system. 59The 60.Fa buf 61argument 62is a pointer to a 63.Vt statfs 64structure defined as follows: 65.Bd -literal 66typedef struct fsid { int32_t val[2]; } fsid_t; /* file system id type */ 67 68/* 69 * filesystem statistics 70 */ 71 72#define MFSNAMELEN 16 /* length of type name including null */ 73#define MNAMELEN 88 /* size of on/from name bufs */ 74#define STATFS_VERSION 0x20030518 /* current version number */ 75 76struct statfs { 77uint32_t f_version; /* structure version number */ 78uint32_t f_type; /* type of filesystem */ 79uint64_t f_flags; /* copy of mount exported flags */ 80uint64_t f_bsize; /* filesystem fragment size */ 81uint64_t f_iosize; /* optimal transfer block size */ 82uint64_t f_blocks; /* total data blocks in filesystem */ 83uint64_t f_bfree; /* free blocks in filesystem */ 84int64_t f_bavail; /* free blocks avail to non-superuser */ 85uint64_t f_files; /* total file nodes in filesystem */ 86int64_t f_ffree; /* free nodes avail to non-superuser */ 87uint64_t f_syncwrites; /* count of sync writes since mount */ 88uint64_t f_asyncwrites; /* count of async writes since mount */ 89uint64_t f_syncreads; /* count of sync reads since mount */ 90uint64_t f_asyncreads; /* count of async reads since mount */ 91uint64_t f_spare[10]; /* unused spare */ 92uint32_t f_namemax; /* maximum filename length */ 93uid_t f_owner; /* user that mounted the filesystem */ 94fsid_t f_fsid; /* filesystem id */ 95char f_charspare[80]; /* spare string space */ 96char f_fstypename[MFSNAMELEN]; /* filesystem type name */ 97char f_mntfromname[MNAMELEN]; /* mounted filesystem */ 98char f_mntonname[MNAMELEN]; /* directory on which mounted */ 99}; 100.Ed 101.Pp 102The flags that may be returned include: 103.Bl -tag -width MNT_SYNCHRONOUS 104.It Dv MNT_RDONLY 105The file system is mounted read-only; 106Even the super-user may not write on it. 107.It Dv MNT_NOEXEC 108Files may not be executed from the file system. 109.It Dv MNT_NOSUID 110Setuid and setgid bits on files are not honored when they are executed. 111.It Dv MNT_SYNCHRONOUS 112All I/O to the file system is done synchronously. 113.It Dv MNT_ASYNC 114No file system I/O is done synchronously. 115.It Dv MNT_SOFTDEP 116Soft updates being done (see 117.Xr ffs 7 ) . 118.It Dv MNT_SUIDDIR 119Special handling of SUID bit on directories. 120.It Dv MNT_UNION 121Union with underlying file system. 122.It Dv MNT_NOSYMFOLLOW 123Symbolic links are not followed. 124.It Dv MNT_NOCLUSTERR 125Read clustering is disabled. 126.It Dv MNT_NOCLUSTERW 127Write clustering is disabled. 128.\".It Dv MNT_JAILDEVFS 129.\"XXX 130.It Dv MNT_MULTILABEL 131Mandatory Access Control (MAC) support for individual objects 132(see 133.Xr mac 4 ) . 134.It Dv MNT_ACLS 135Access Control List (ACL) support enabled. 136.It Dv MNT_LOCAL 137The file system resides locally. 138.It Dv MNT_QUOTA 139The file system has quotas enabled on it. 140.It Dv MNT_ROOTFS 141Identifies the root file system. 142.It Dv MNT_EXRDONLY 143The file system is exported read-only. 144.It Dv MNT_NOATIME 145Updating of file access times is disabled. 146.It Dv MNT_USER 147The file system has been mounted by a user. 148.\".It Dv MNT_IGNORE 149.\"XXX 150.It Dv MNT_EXPORTED 151The file system is exported for both reading and writing. 152.It Dv MNT_DEFEXPORTED 153The file system is exported for both reading and writing to any Internet host. 154.It Dv MNT_EXPORTANON 155The file system maps all remote accesses to the anonymous user. 156.It Dv MNT_EXKERB 157The file system is exported with Kerberos uid mapping. 158.It Dv MNT_EXPUBLIC 159The file system is exported publicly (WebNFS). 160.El 161.Pp 162Fields that are undefined for a particular file system are set to -1. 163The 164.Fn fstatfs 165system call 166returns the same information about an open file referenced by descriptor 167.Fa fd . 168.Sh RETURN VALUES 169.Rv -std 170.Sh ERRORS 171The 172.Fn statfs 173system call 174fails if one or more of the following are true: 175.Bl -tag -width Er 176.It Bq Er ENOTDIR 177A component of the path prefix of 178.Fa path 179is not a directory. 180.It Bq Er ENAMETOOLONG 181The length of a component of 182.Fa path 183exceeds 255 characters, 184or the length of 185.Fa path 186exceeds 1023 characters. 187.It Bq Er ENOENT 188The file referred to by 189.Fa path 190does not exist. 191.It Bq Er EACCES 192Search permission is denied for a component of the path prefix of 193.Fa path . 194.It Bq Er ELOOP 195Too many symbolic links were encountered in translating 196.Fa path . 197.It Bq Er EFAULT 198The 199.Fa buf 200or 201.Fa path 202argument 203points to an invalid address. 204.It Bq Er EIO 205An 206.Tn I/O 207error occurred while reading from or writing to the file system. 208.El 209.Pp 210The 211.Fn fstatfs 212system call 213fails if one or more of the following are true: 214.Bl -tag -width Er 215.It Bq Er EBADF 216The 217.Fa fd 218argument 219is not a valid open file descriptor. 220.It Bq Er EFAULT 221The 222.Fa buf 223argument 224points to an invalid address. 225.It Bq Er EIO 226An 227.Tn I/O 228error occurred while reading from or writing to the file system. 229.El 230.Sh SEE ALSO 231.Xr fhstatfs 2 232.Sh HISTORY 233The 234.Fn statfs 235system call first appeared in 236.Bx 4.4 . 237