[dump.git] / compat / lib / fstab.c

/*
 *	Ported to Linux's Second Extended File System as part of the
 *	dump and restore backup suit
 *	Remy Card <card@Linux.EU.Org>, 1994-1997
 *      Stelian Pop <pop@cybercable.fr>, 1999
 *
 */

/*
 * Copyright (c) 1980, 1988, 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.
 *
 * $Id: fstab.c,v 1.4 1999/10/11 13:31:10 stelian Exp $
 */

#include <errno.h>
#include <fstab.h>
#include <mntent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

static FILE *_fs_fp;
static struct fstab _fs_fstab;

static void error __P((int));
static int fstabscan __P((void));

static
int fstabscan(void)
{
	struct mntent	*mnt;
	register char *cp;
	int typexx;
#define	MAXLINELENGTH	1024
	char subline[MAXLINELENGTH];

	for (;;) {
		if (!(mnt = getmntent(_fs_fp)))
			return 0;

		_fs_fstab.fs_spec = mnt->mnt_fsname;
		_fs_fstab.fs_file = mnt->mnt_dir;
		_fs_fstab.fs_vfstype = mnt->mnt_type;
		_fs_fstab.fs_mntops = mnt->mnt_opts;
		_fs_fstab.fs_type = FSTAB_RW;	/* rw by default under Linux */
		_fs_fstab.fs_freq = mnt->mnt_freq;
		_fs_fstab.fs_passno = mnt->mnt_passno;

		strcpy(subline, _fs_fstab.fs_mntops);
		for (typexx = 0, cp = strtok(subline, ","); cp;
		     cp = strtok((char *)NULL, ",")) {
			if (!strcmp(cp, FSTAB_RW)) {
				_fs_fstab.fs_type = FSTAB_RW;
				break;
			}
			if (!strcmp(cp, FSTAB_RQ)) {
				_fs_fstab.fs_type = FSTAB_RQ;
				break;
			}
			if (!strcmp(cp, FSTAB_RO)) {
				_fs_fstab.fs_type = FSTAB_RO;
				break;
			}
			if (!strcmp(cp, FSTAB_SW)) {
				_fs_fstab.fs_type = FSTAB_SW;
				break;
			}
			if (!strcmp(cp, FSTAB_XX)) {
				_fs_fstab.fs_type = FSTAB_XX;
				typexx++;
				break;
			}
		}
		if (typexx)
			continue;

		return 1;
	}
}

struct fstab *
getfsent(void)
{
	if ((!_fs_fp && !setfsent()) || !fstabscan())
		return((struct fstab *)NULL);
	return(&_fs_fstab);
}

struct fstab *
getfsspec(const char *name)
{
	if (setfsent())
		while (fstabscan())
			if (!strcmp(_fs_fstab.fs_spec, name))
				return(&_fs_fstab);
	return((struct fstab *)NULL);
}

struct fstab *
getfsfile(const char *name)
{
	if (setfsent())
		while (fstabscan())
			if (!strcmp(_fs_fstab.fs_file, name))
				return(&_fs_fstab);
	return((struct fstab *)NULL);
}

int
setfsent(void)
{
	if (_fs_fp) {
		rewind(_fs_fp);
		return(1);
	}
	if ((_fs_fp = setmntent(_PATH_FSTAB, "r")))
		return(1);
	error(errno);
	return(0);
}

void
endfsent(void)
{
	if (_fs_fp) {
		(void)endmntent(_fs_fp);
		_fs_fp = NULL;
	}
}

static
void error(int err)
{
	char *p;

	(void)write(STDERR_FILENO, "fstab: ", 7);
	(void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1);
	(void)write(STDERR_FILENO, ": ", 1);
	p = strerror(err);
	(void)write(STDERR_FILENO, p, strlen(p));
	(void)write(STDERR_FILENO, "\n", 1);
}
Commit	Line	Data
1227625a SP	1	/*
	2	* Ported to Linux's Second Extended File System as part of the
	3	* dump and restore backup suit
b45f51d6 SP	4	* Remy Card <card@Linux.EU.Org>, 1994-1997
b45f51d6 SP	5	* Stelian Pop <pop@cybercable.fr>, 1999
1227625a SP	6	*
	7	*/
	8
	9	/*
	10	* Copyright (c) 1980, 1988, 1993
	11	* The Regents of the University of California. All rights reserved.
	12	*
	13	* Redistribution and use in source and binary forms, with or without
	14	* modification, are permitted provided that the following conditions
	15	* are met:
	16	* 1. Redistributions of source code must retain the above copyright
	17	* notice, this list of conditions and the following disclaimer.
	18	* 2. Redistributions in binary form must reproduce the above copyright
	19	* notice, this list of conditions and the following disclaimer in the
	20	* documentation and/or other materials provided with the distribution.
	21	* 3. All advertising materials mentioning features or use of this software
	22	* must display the following acknowledgement:
	23	* This product includes software developed by the University of
	24	* California, Berkeley and its contributors.
	25	* 4. Neither the name of the University nor the names of its contributors
	26	* may be used to endorse or promote products derived from this software
	27	* without specific prior written permission.
	28	*
	29	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	30	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	31	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	32	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	33	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	34	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	35	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	36	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	37	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	38	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	39	* SUCH DAMAGE.
ec387a12 SP	40	*
ec387a12 SP	41	* $Id: fstab.c,v 1.4 1999/10/11 13:31:10 stelian Exp $
1227625a SP	42	*/
1227625a SP	43
1227625a SP	44	#include <errno.h>
	45	#include <fstab.h>
	46	#include <mntent.h>
	47	#include <stdio.h>
	48	#include <stdlib.h>
	49	#include <string.h>
	50	#include <unistd.h>
	51
	52	static FILE *_fs_fp;
	53	static struct fstab _fs_fstab;
	54
	55	static void error __P((int));
	56	static int fstabscan __P((void));
	57
	58	static
ddd2ef55	59	int fstabscan(void)
1227625a SP	60	{
	61	struct mntent *mnt;
	62	register char *cp;
	63	int typexx;
	64	#define MAXLINELENGTH 1024
	65	char subline[MAXLINELENGTH];
	66
	67	for (;;) {
	68	if (!(mnt = getmntent(_fs_fp)))
	69	return 0;
	70
	71	_fs_fstab.fs_spec = mnt->mnt_fsname;
	72	_fs_fstab.fs_file = mnt->mnt_dir;
	73	_fs_fstab.fs_vfstype = mnt->mnt_type;
	74	_fs_fstab.fs_mntops = mnt->mnt_opts;
	75	_fs_fstab.fs_type = FSTAB_RW; /* rw by default under Linux */
	76	_fs_fstab.fs_freq = mnt->mnt_freq;
	77	_fs_fstab.fs_passno = mnt->mnt_passno;
	78
	79	strcpy(subline, _fs_fstab.fs_mntops);
	80	for (typexx = 0, cp = strtok(subline, ","); cp;
	81	cp = strtok((char *)NULL, ",")) {
	82	if (!strcmp(cp, FSTAB_RW)) {
	83	_fs_fstab.fs_type = FSTAB_RW;
	84	break;
	85	}
	86	if (!strcmp(cp, FSTAB_RQ)) {
	87	_fs_fstab.fs_type = FSTAB_RQ;
	88	break;
	89	}
	90	if (!strcmp(cp, FSTAB_RO)) {
	91	_fs_fstab.fs_type = FSTAB_RO;
	92	break;
	93	}
	94	if (!strcmp(cp, FSTAB_SW)) {
	95	_fs_fstab.fs_type = FSTAB_SW;
	96	break;
	97	}
	98	if (!strcmp(cp, FSTAB_XX)) {
	99	_fs_fstab.fs_type = FSTAB_XX;
	100	typexx++;
	101	break;
	102	}
	103	}
	104	if (typexx)
	105	continue;
	106
	107	return 1;
	108	}
	109	}
	110
	111	struct fstab *
ddd2ef55	112	getfsent(void)
1227625a	113	{
b45f51d6	114	if ((!_fs_fp && !setfsent()) \|\| !fstabscan())
1227625a SP	115	return((struct fstab *)NULL);
	116	return(&_fs_fstab);
	117	}
	118
	119	struct fstab *
ddd2ef55	120	getfsspec(const char *name)
1227625a SP	121	{
	122	if (setfsent())
	123	while (fstabscan())
	124	if (!strcmp(_fs_fstab.fs_spec, name))
	125	return(&_fs_fstab);
	126	return((struct fstab *)NULL);
	127	}
	128
	129	struct fstab *
ddd2ef55	130	getfsfile(const char *name)
1227625a SP	131	{
	132	if (setfsent())
	133	while (fstabscan())
	134	if (!strcmp(_fs_fstab.fs_file, name))
	135	return(&_fs_fstab);
	136	return((struct fstab *)NULL);
	137	}
	138
ddd2ef55 SP	139	int
ddd2ef55 SP	140	setfsent(void)
1227625a SP	141	{
	142	if (_fs_fp) {
	143	rewind(_fs_fp);
	144	return(1);
	145	}
	146	if ((_fs_fp = setmntent(_PATH_FSTAB, "r")))
	147	return(1);
	148	error(errno);
	149	return(0);
	150	}
	151
	152	void
ddd2ef55	153	endfsent(void)
1227625a SP	154	{
	155	if (_fs_fp) {
	156	(void)endmntent(_fs_fp);
	157	_fs_fp = NULL;
	158	}
	159	}
	160
	161	static
ddd2ef55	162	void error(int err)
1227625a SP	163	{
	164	char *p;
	165
	166	(void)write(STDERR_FILENO, "fstab: ", 7);
	167	(void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1);
	168	(void)write(STDERR_FILENO, ": ", 1);
	169	p = strerror(err);
	170	(void)write(STDERR_FILENO, p, strlen(p));
	171	(void)write(STDERR_FILENO, "\n", 1);
	172	}