137 lines
4.4 KiB
Groff
137 lines
4.4 KiB
Groff
.\" Copyright (c) 1989, 1991 The Regents of the University of California.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" from: @(#)getfsstat.2 6.6 (Berkeley) 7/23/91
|
|
.\" $Id: getfsstat.2,v 1.2 1993/08/01 07:43:05 mycroft Exp $
|
|
.\"
|
|
.Dd July 23, 1991
|
|
.Dt GETFSSTAT 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm getfsstat
|
|
.Nd get list of all mounted filesystems
|
|
.Sh SYNOPSIS
|
|
.Fd #include <sys/types.h>
|
|
.Fd #include <sys/mount.h>
|
|
.Ft int
|
|
.Fn getfsstat "struct statfs *buf" "long bufsize" "int flags"
|
|
.Sh DESCRIPTION
|
|
.Fn Getfsstat
|
|
returns information about all mounted filesystems.
|
|
.Fa Buf
|
|
is a pointer to
|
|
.Xr statfs
|
|
structures defined as follows:
|
|
.Bd -literal
|
|
typedef quad fsid_t;
|
|
|
|
#define MNAMELEN 32 /* length of buffer for returned name */
|
|
|
|
struct statfs {
|
|
short f_type; /* type of filesystem (see below) */
|
|
short f_flags; /* copy of mount flags */
|
|
long f_fsize; /* fundamental filesystem block size */
|
|
long f_bsize; /* optimal transfer block size */
|
|
long f_blocks; /* total data blocks in filesystem */
|
|
long f_bfree; /* free blocks in fs */
|
|
long f_bavail; /* free blocks avail to non-superuser */
|
|
long f_files; /* total file nodes in filesystem */
|
|
long f_ffree; /* free file nodes in fs */
|
|
fsid_t f_fsid; /* filesystem id */
|
|
long f_spare[6]; /* spare for later */
|
|
char f_mntonname[MNAMELEN]; /* directory on which mounted */
|
|
char f_mntfromname[MNAMELEN]; /* mounted filesystem */
|
|
};
|
|
/*
|
|
* File system types.
|
|
*/
|
|
#define MOUNT_UFS 1
|
|
#define MOUNT_NFS 2
|
|
#define MOUNT_PC 3
|
|
.Ed
|
|
.Pp
|
|
Fields that are undefined for a particular filesystem are set to -1.
|
|
The buffer is filled with an array of
|
|
.Fa fsstat
|
|
structures, one for each mounted filesystem
|
|
up to the size specified by
|
|
.Fa bufsize .
|
|
.Pp
|
|
If
|
|
.Fa buf
|
|
is given as NULL,
|
|
.Fn getfsstat
|
|
returns just the number of mounted filesystems.
|
|
.Pp
|
|
Normally
|
|
.Fa flags
|
|
should be specified as
|
|
.Dv MNT_WAIT .
|
|
If
|
|
.Fa flags
|
|
is set to
|
|
.Dv MNT_NOWAIT ,
|
|
.Fn getfsstat
|
|
will return the information it has available without requesting
|
|
an update from each filesystem.
|
|
Thus, some of the information will be out of date, but
|
|
.Fn getfsstat
|
|
will not block waiting for information from a filesystem that is
|
|
unable to respond.
|
|
.Sh RETURN VALUES
|
|
Upon successful completion, the number of
|
|
.Fa fsstat
|
|
structures is returned.
|
|
Otherwise, -1 is returned and the global variable
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ERRORS
|
|
.Fn Getfsstat
|
|
fails if one or more of the following are true:
|
|
.Bl -tag -width Er
|
|
.It EFAULT
|
|
.Fa Buf
|
|
points to an invalid address.
|
|
.It EIO
|
|
An
|
|
.Tn I/O
|
|
error occurred while reading from or writing to the filesystem.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr statfs 2 ,
|
|
.Xr fstab 5 ,
|
|
.Xr mount 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm getfsstat
|
|
function call is
|
|
.Ud .
|