getmntopts.c revision 123268
1204076Spjd/*- 2204076Spjd * Copyright (c) 1994 3219351Spjd * The Regents of the University of California. All rights reserved. 4204076Spjd * 5204076Spjd * Redistribution and use in source and binary forms, with or without 6204076Spjd * modification, are permitted provided that the following conditions 7204076Spjd * are met: 8204076Spjd * 1. Redistributions of source code must retain the above copyright 9204076Spjd * notice, this list of conditions and the following disclaimer. 10204076Spjd * 2. Redistributions in binary form must reproduce the above copyright 11204076Spjd * notice, this list of conditions and the following disclaimer in the 12204076Spjd * documentation and/or other materials provided with the distribution. 13204076Spjd * 3. All advertising materials mentioning features or use of this software 14204076Spjd * must display the following acknowledgement: 15204076Spjd * This product includes software developed by the University of 16204076Spjd * California, Berkeley and its contributors. 17204076Spjd * 4. Neither the name of the University nor the names of its contributors 18204076Spjd * may be used to endorse or promote products derived from this software 19204076Spjd * without specific prior written permission. 20204076Spjd * 21204076Spjd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22204076Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23204076Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24204076Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25204076Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26204076Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27204076Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28204076Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29204076Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30204076Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31204076Spjd * SUCH DAMAGE. 32204076Spjd */ 33204076Spjd 34204076Spjd#if 0 35204076Spjd#ifndef lint 36204076Spjdstatic char sccsid[] = "@(#)getmntopts.c 8.3 (Berkeley) 3/29/95"; 37204076Spjd#endif /* not lint */ 38204076Spjd#endif 39204076Spjd#include <sys/cdefs.h> 40204076Spjd__FBSDID("$FreeBSD: head/sbin/mount/getmntopts.c 123268 2003-12-07 23:02:16Z trhodes $"); 41204076Spjd 42204076Spjd#include <sys/param.h> 43204076Spjd#include <sys/stat.h> 44204076Spjd 45204076Spjd#include <err.h> 46204076Spjd#include <errno.h> 47204076Spjd#include <stdlib.h> 48211982Spjd#include <string.h> 49204076Spjd#include <sysexits.h> 50204076Spjd 51204076Spjd#include "mntopts.h" 52204076Spjd 53204076Spjdint getmnt_silent = 0; 54204076Spjd 55204076Spjdvoid 56204076Spjdgetmntopts(options, m0, flagp, altflagp) 57204076Spjd const char *options; 58204076Spjd const struct mntopt *m0; 59204076Spjd int *flagp; 60212038Spjd int *altflagp; 61204076Spjd{ 62204076Spjd const struct mntopt *m; 63204076Spjd int negative, len; 64211886Spjd char *opt, *optbuf, *p; 65204076Spjd int *thisflagp; 66204076Spjd 67204076Spjd /* Copy option string, since it is about to be torn asunder... */ 68204076Spjd if ((optbuf = strdup(options)) == NULL) 69204076Spjd err(1, NULL); 70204076Spjd 71210886Spjd for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 72210886Spjd /* Check for "no" prefix. */ 73210886Spjd if (opt[0] == 'n' && opt[1] == 'o') { 74204076Spjd negative = 1; 75204076Spjd opt += 2; 76204076Spjd } else 77204076Spjd negative = 0; 78204076Spjd 79204076Spjd /* 80204076Spjd * for options with assignments in them (ie. quotas) 81204076Spjd * ignore the assignment as it's handled elsewhere 82204076Spjd */ 83204076Spjd p = strchr(opt, '='); 84204076Spjd if (p != NULL) 85204076Spjd *++p = '\0'; 86204076Spjd 87204076Spjd /* Scan option table. */ 88204076Spjd for (m = m0; m->m_option != NULL; ++m) { 89204076Spjd len = strlen(m->m_option); 90204076Spjd if (strncasecmp(opt, m->m_option, len) == 0) 91204076Spjd if ( m->m_option[len] == '\0' 92204076Spjd || m->m_option[len] == '=' 93204076Spjd ) 94204076Spjd break; 95204076Spjd } 96204076Spjd 97204076Spjd /* Save flag, or fail if option is not recognized. */ 98204076Spjd if (m->m_option) { 99204076Spjd thisflagp = m->m_altloc ? altflagp : flagp; 100204076Spjd if (negative == m->m_inverse) 101204076Spjd *thisflagp |= m->m_flag; 102204076Spjd else 103204076Spjd *thisflagp &= ~m->m_flag; 104204076Spjd } else if (!getmnt_silent) { 105204076Spjd errx(1, "-o %s: option not supported", opt); 106204076Spjd } 107204076Spjd } 108204076Spjd 109204076Spjd free(optbuf); 110204076Spjd} 111204076Spjd 112204076Spjdvoid 113204076Spjdrmslashes(rrpin, rrpout) 114204076Spjd char *rrpin; 115204076Spjd char *rrpout; 116204076Spjd{ 117204076Spjd char *rrpoutstart; 118204076Spjd 119204076Spjd *rrpout = *rrpin; 120204076Spjd for (rrpoutstart = rrpout; *rrpin != '\0'; *rrpout++ = *rrpin++) { 121204076Spjd 122204076Spjd /* skip all double slashes */ 123204076Spjd while (*rrpin == '/' && *(rrpin + 1) == '/') 124204076Spjd rrpin++; 125204076Spjd } 126204076Spjd 127204076Spjd /* remove trailing slash if necessary */ 128204076Spjd if (rrpout - rrpoutstart > 1 && *(rrpout - 1) == '/') 129204076Spjd *(rrpout - 1) = '\0'; 130204076Spjd else 131204076Spjd *rrpout = '\0'; 132204076Spjd} 133204076Spjd 134204076Spjdvoid 135204076Spjdcheckpath(path, resolved) 136204076Spjd const char *path; 137204076Spjd char *resolved; 138204076Spjd{ 139204076Spjd struct stat sb; 140204076Spjd 141204076Spjd if (realpath(path, resolved) != NULL && stat(resolved, &sb) == 0) { 142204076Spjd if (!S_ISDIR(sb.st_mode)) 143204076Spjd errx(EX_USAGE, "%s: not a directory", resolved); 144204076Spjd } else 145204076Spjd errx(EX_USAGE, "%s: %s", resolved, strerror(errno)); 146204076Spjd} 147204076Spjd