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getmntopts.c revision 1.1 
      1 /*	$NetBSD: getmntopts.c,v 1.1 2003/03/22 12:44:04 jdolecek Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)getmntopts.c	8.3 (Berkeley) 3/29/95";
     40 #else
     41 __RCSID("$NetBSD: getmntopts.c,v 1.1 2003/03/22 12:44:04 jdolecek Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include <sys/param.h>
     46 #include <sys/mount.h>
     47 
     48 #include <err.h>
     49 #include <errno.h>
     50 #include <fstab.h>
     51 #include <stdlib.h>
     52 #include <string.h>
     53 
     54 #include <mntopts.h>
     55 
     56 int getmnt_silent = 0;
     57 
     58 void
     59 getmntopts(options, m0, flagp, altflagp)
     60 	const char *options;
     61 	const struct mntopt *m0;
     62 	int *flagp;
     63 	int *altflagp;
     64 {
     65 	const struct mntopt *m;
     66 	int negative;
     67 	char *opt, *optbuf, *p;
     68 	int *thisflagp;
     69 
     70 	/* Copy option string, since it is about to be torn asunder... */
     71 	if ((optbuf = strdup(options)) == NULL)
     72 		err(1, NULL);
     73 
     74 	for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
     75 		/* Check for "no" prefix. */
     76 		if (opt[0] == 'n' && opt[1] == 'o') {
     77 			negative = 1;
     78 			opt += 2;
     79 		} else
     80 			negative = 0;
     81 
     82 		/*
     83 		 * for options with assignments in them (ie. quotas)
     84 		 * ignore the assignment as it's handled elsewhere
     85 		 */
     86 		p = strchr(opt, '=');
     87 		if (p)
     88 			 *p = '\0';
     89 
     90 		/* Scan option table. */
     91 		for (m = m0; m->m_option != NULL; ++m)
     92 			if (strcasecmp(opt, m->m_option) == 0)
     93 				break;
     94 
     95 		/* Save flag, or fail if option is not recognised. */
     96 		if (m->m_option) {
     97 			thisflagp = m->m_altloc ? altflagp : flagp;
     98 			if (negative == m->m_inverse)
     99 				*thisflagp |= m->m_flag;
    100 			else
    101 				*thisflagp &= ~m->m_flag;
    102 		} else if (!getmnt_silent) {
    103 			errx(1, "-o %s: option not supported", opt);
    104 		}
    105 	}
    106 
    107 	free(optbuf);
    108 }
    109