190 lines
4.8 KiB
Groff
190 lines
4.8 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
|
|
.\" 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.
|
|
.\"
|
|
.\" @(#)getfsent.3 8.1 (Berkeley) 6/4/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 7, 2003
|
|
.Dt GETFSENT 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm getfsent ,
|
|
.Nm getfsspec ,
|
|
.Nm getfsfile ,
|
|
.Nm setfsent ,
|
|
.Nm endfsent
|
|
.Nd get file system descriptor file entry
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In fstab.h
|
|
.Ft "struct fstab *"
|
|
.Fn getfsent void
|
|
.Ft "struct fstab *"
|
|
.Fn getfsspec "const char *spec"
|
|
.Ft "struct fstab *"
|
|
.Fn getfsfile "const char *file"
|
|
.Ft int
|
|
.Fn setfsent void
|
|
.Ft void
|
|
.Fn endfsent void
|
|
.Ft void
|
|
.Fn setfstab "const char *file"
|
|
.Ft "const char *"
|
|
.Fn getfstab void
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn getfsent ,
|
|
.Fn getfsspec ,
|
|
and
|
|
.Fn getfsfile
|
|
functions
|
|
each return a pointer to an object with the following structure
|
|
containing the broken-out fields of a line in the file system
|
|
description file,
|
|
.Aq Pa fstab.h .
|
|
.Bd -literal -offset indent
|
|
struct fstab {
|
|
char *fs_spec; /* block special device name */
|
|
char *fs_file; /* file system path prefix */
|
|
char *fs_vfstype; /* File system type, ufs, nfs */
|
|
char *fs_mntops; /* Mount options ala -o */
|
|
char *fs_type; /* FSTAB_* from fs_mntops */
|
|
int fs_freq; /* dump frequency, in days */
|
|
int fs_passno; /* pass number on parallel fsck */
|
|
};
|
|
.Ed
|
|
.Pp
|
|
The fields have meanings described in
|
|
.Xr fstab 5 .
|
|
.Pp
|
|
The
|
|
.Fn setfsent
|
|
function
|
|
opens the file (closing any previously opened file) or rewinds it
|
|
if it is already open.
|
|
.Pp
|
|
The
|
|
.Fn endfsent
|
|
function
|
|
closes the file.
|
|
.Pp
|
|
The
|
|
.Fn setfstab
|
|
function sets the file to be used by subsequent operations.
|
|
The value set by
|
|
.Fn setfstab
|
|
does not persist across calls to
|
|
.Fn endfsent .
|
|
.Pp
|
|
The
|
|
.Fn getfstab
|
|
function returns the name of the file that will be used.
|
|
.Pp
|
|
The
|
|
.Fn getfsspec
|
|
and
|
|
.Fn getfsfile
|
|
functions
|
|
search the entire file (opening it if necessary) for a matching special
|
|
file name or file system file name.
|
|
.Pp
|
|
For programs wishing to read the entire database,
|
|
.Fn getfsent
|
|
reads the next entry (opening the file if necessary).
|
|
.Pp
|
|
All entries in the file with a type field equivalent to
|
|
.Dv FSTAB_XX
|
|
are ignored.
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn getfsent ,
|
|
.Fn getfsspec ,
|
|
and
|
|
.Fn getfsfile
|
|
functions
|
|
return a
|
|
.Dv NULL
|
|
pointer on
|
|
.Dv EOF
|
|
or error.
|
|
The
|
|
.Fn setfsent
|
|
function
|
|
returns 0 on failure, 1 on success.
|
|
The
|
|
.Fn endfsent
|
|
function
|
|
returns nothing.
|
|
.Sh ENVIRONMENT
|
|
.Bl -tag -width ".Ev PATH_FSTAB"
|
|
.It Ev PATH_FSTAB
|
|
If the environment variable
|
|
.Ev PATH_FSTAB
|
|
is set, all operations are performed against the specified file.
|
|
.Ev PATH_FSTAB
|
|
will not be honored if the process environment or memory address space is
|
|
considred
|
|
.Dq tainted .
|
|
(See
|
|
.Xr issetugid 2
|
|
for more information.)
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width /etc/fstab -compact
|
|
.It Pa /etc/fstab
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr fstab 5
|
|
.Sh HISTORY
|
|
The
|
|
.Fn getfsent
|
|
function appeared in
|
|
.Bx 4.0 ;
|
|
the
|
|
.Fn endfsent ,
|
|
.Fn getfsfile ,
|
|
.Fn getfsspec ,
|
|
and
|
|
.Fn setfsent
|
|
functions appeared in
|
|
.Bx 4.3 ;
|
|
the
|
|
.Fn setfstab
|
|
and
|
|
.Fn getfstab
|
|
functions appeared in
|
|
.Fx 5.1 .
|
|
.Sh BUGS
|
|
These functions use static data storage;
|
|
if the data is needed for future use, it should be
|
|
copied before any subsequent calls overwrite it.
|