getmntopts.c revision 28671
1/*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35#if 0 36static char sccsid[] = "@(#)getmntopts.c 8.3 (Berkeley) 3/29/95"; 37#else 38static const char rcsid[] = 39 "$Id$"; 40#endif 41#endif /* not lint */ 42 43#include <sys/param.h> 44#include <sys/mount.h> 45 46#include <err.h> 47#include <errno.h> 48#include <fstab.h> 49#include <stdlib.h> 50#include <string.h> 51 52#include "extern.h" 53#include "mntopts.h" 54 55int getmnt_silent = 0; 56 57void 58getmntopts(options, m0, flagp, altflagp) 59 const char *options; 60 const struct mntopt *m0; 61 int *flagp; 62 int *altflagp; 63{ 64 const struct mntopt *m; 65 int negative, len; 66 char *opt, *optbuf, *p; 67 int *thisflagp; 68 69 /* Copy option string, since it is about to be torn asunder... */ 70 if ((optbuf = strdup(options)) == NULL) 71 err(1, NULL); 72 73 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 74 /* Check for "no" prefix. */ 75 if (opt[0] == 'n' && opt[1] == 'o') { 76 negative = 1; 77 opt += 2; 78 } else 79 negative = 0; 80 81 /* 82 * for options with assignments in them (ie. quotas) 83 * ignore the assignment as it's handled elsewhere 84 */ 85 p = strchr(opt, '='); 86 if (p) 87 *++p = '\0'; 88 89 /* Scan option table. */ 90 for (m = m0; m->m_option != NULL; ++m) { 91 len = strlen(m->m_option); 92 if (strncasecmp(opt, m->m_option, len) == 0) 93 if ( m->m_option[len] == '\0' 94 || m->m_option[len] == '=' 95 ) 96 break; 97 } 98 99 /* Save flag, or fail if option is not recognised. */ 100 if (m->m_option) { 101 thisflagp = m->m_altloc ? altflagp : flagp; 102 if (negative == m->m_inverse) 103 *thisflagp |= m->m_flag; 104 else 105 *thisflagp &= ~m->m_flag; 106 } else if (!getmnt_silent) { 107 errx(1, "-o %s: option not supported", opt); 108 } 109 } 110 111 free(optbuf); 112} 113