usr/src/lib/libc/gen/getfsent.3

.\" Copyright (c) 1983 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" %sccs.include.redist.man%
.\"
.\"     @(#)getfsent.3  6.8 (Berkeley) %G%
.\"
.TH GETFSENT 3  ""
.UC 4
.SH NAME
getfsent, getfsspec, getfsfile, setfsent, endfsent \- get file system descriptor file entry
.SH SYNOPSIS
.nf
.B #include <fstab.h>
.PP
.B struct fstab *getfsent()
.PP
.B struct fstab *getfsspec(spec)
.B char *spec;
.PP
.B struct fstab *getfsfile(file)
.B char *file;
.PP
.B int setfsent()
.PP
.B void endfsent()
.fi
.SH DESCRIPTION
.IR Getfsent ,
.IR getfsspec ,
and
.I getfsfile
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,
.IR < fstab.h >.
.RS
.PP
.nf
.ta \w'#define 'u +\w'char\ \ 'u +\w'*fs_vfstype;\ \ 'u
struct fstab {
        char    *fs_spec;       /* block special device name */
        char    *fs_file;       /* file system path prefix */
        char    *fs_vfstype;    /* type of file system */
        char    *fs_mntops;     /* comma separated mount options */
        char    *fs_type;       /* rw, ro, sw, or xx */
        int     fs_freq;        /* dump frequency, in days */
        int     fs_passno;      /* pass number on parallel dump */
};
.ft R
.ad
.fi
.RE
.PP
The fields have meanings described in
.IR fstab (5).
.PP
.I Setfsent
opens the file (closing any previously opened file) or rewinds it
if it is already open.
.PP
.I Endfsent
closes the file.
.PP
.I Getfsspec
and
.I getfsfile
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,
.I getfsent
reads the next entry (opening the file if necessary).
.PP
All entries in the file with a type field equivalent to
.I FSTAB_XX
are ignored.
.SH FILES
/etc/fstab
.SH "SEE ALSO"
fstab(5)
.SH DIAGNOSTICS
.IR Getfsent ,
.IR getfsspec ,
and
.I getfsfile
return a null pointer (0) on EOF or error.
.I Setfsent
returns 0 on failure, 1 on success.
.I Endfsent
returns nothing.
.SH BUGS
All information is contained in a static area so it must be copied if it is
to be saved.