getmntopts.c revision 123268
176633Stshiozak/*- 276633Stshiozak * Copyright (c) 1994 376633Stshiozak * The Regents of the University of California. All rights reserved. 476633Stshiozak * 576633Stshiozak * Redistribution and use in source and binary forms, with or without 676633Stshiozak * modification, are permitted provided that the following conditions 776633Stshiozak * are met: 876633Stshiozak * 1. Redistributions of source code must retain the above copyright 976633Stshiozak * notice, this list of conditions and the following disclaimer. 1076633Stshiozak * 2. Redistributions in binary form must reproduce the above copyright 1176633Stshiozak * notice, this list of conditions and the following disclaimer in the 1276633Stshiozak * documentation and/or other materials provided with the distribution. 1376633Stshiozak * 3. All advertising materials mentioning features or use of this software 1476633Stshiozak * must display the following acknowledgement: 1576633Stshiozak * This product includes software developed by the University of 1676633Stshiozak * California, Berkeley and its contributors. 1776633Stshiozak * 4. Neither the name of the University nor the names of its contributors 1876633Stshiozak * may be used to endorse or promote products derived from this software 1976633Stshiozak * without specific prior written permission. 2076633Stshiozak * 2176633Stshiozak * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2276633Stshiozak * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2376633Stshiozak * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2476633Stshiozak * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2576633Stshiozak * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2676633Stshiozak * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2776633Stshiozak * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2876633Stshiozak * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2976633Stshiozak * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3076633Stshiozak * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3176633Stshiozak * SUCH DAMAGE. 3276633Stshiozak */ 3376633Stshiozak 3476633Stshiozak#if 0 3576633Stshiozak#ifndef lint 3676633Stshiozakstatic char sccsid[] = "@(#)getmntopts.c 8.3 (Berkeley) 3/29/95"; 3776633Stshiozak#endif /* not lint */ 3876633Stshiozak#endif 3976633Stshiozak#include <sys/cdefs.h> 4076633Stshiozak__FBSDID("$FreeBSD: head/sbin/mount/getmntopts.c 123268 2003-12-07 23:02:16Z trhodes $"); 4176633Stshiozak 4276633Stshiozak#include <sys/param.h> 4376633Stshiozak#include <sys/stat.h> 4476633Stshiozak 4576633Stshiozak#include <err.h> 4676633Stshiozak#include <errno.h> 4776633Stshiozak#include <stdlib.h> 4876633Stshiozak#include <string.h> 4976633Stshiozak#include <sysexits.h> 5076633Stshiozak 5176633Stshiozak#include "mntopts.h" 5276633Stshiozak 5376633Stshiozakint getmnt_silent = 0; 5476633Stshiozak 5576633Stshiozakvoid 5676633Stshiozakgetmntopts(options, m0, flagp, altflagp) 5776633Stshiozak const char *options; 5876633Stshiozak const struct mntopt *m0; 5976633Stshiozak int *flagp; 6076633Stshiozak int *altflagp; 6176633Stshiozak{ 6276633Stshiozak const struct mntopt *m; 6379555Sobrien int negative, len; 6479555Sobrien char *opt, *optbuf, *p; 6576633Stshiozak int *thisflagp; 6676633Stshiozak 6776633Stshiozak /* Copy option string, since it is about to be torn asunder... */ 6876633Stshiozak if ((optbuf = strdup(options)) == NULL) 6976633Stshiozak err(1, NULL); 7076633Stshiozak 71102227Smike for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 72101776Stjr /* Check for "no" prefix. */ 7376636Stshiozak if (opt[0] == 'n' && opt[1] == 'o') { 74103269Stjr negative = 1; 7576636Stshiozak opt += 2; 7676633Stshiozak } else 77102227Smike negative = 0; 78102227Smike 79102227Smike /* 80101409Stjr * for options with assignments in them (ie. quotas) 81101409Stjr * ignore the assignment as it's handled elsewhere 82102227Smike */ 83102227Smike p = strchr(opt, '='); 84102227Smike if (p != NULL) 85101409Stjr *++p = '\0'; 86101409Stjr 8799640Sobrien /* Scan option table. */ 88102227Smike for (m = m0; m->m_option != NULL; ++m) { 89102227Smike len = strlen(m->m_option); 90102227Smike if (strncasecmp(opt, m->m_option, len) == 0) 9176633Stshiozak if ( m->m_option[len] == '\0' 9299640Sobrien || m->m_option[len] == '=' 9376633Stshiozak ) 94102227Smike break; 95102227Smike } 96102227Smike 9776633Stshiozak /* Save flag, or fail if option is not recognized. */ 9876633Stshiozak if (m->m_option) { 9976633Stshiozak thisflagp = m->m_altloc ? altflagp : flagp; 10076633Stshiozak if (negative == m->m_inverse) 10176633Stshiozak *thisflagp |= m->m_flag; 10276633Stshiozak else 103103177Stjr *thisflagp &= ~m->m_flag; 104103218Stjr } else if (!getmnt_silent) { 105103177Stjr errx(1, "-o %s: option not supported", opt); 10676633Stshiozak } 107101411Stjr } 108103177Stjr 109101776Stjr free(optbuf); 110103177Stjr} 111103177Stjr 112103177Stjrvoid 113103177Stjrrmslashes(rrpin, rrpout) 114103177Stjr char *rrpin; 115101776Stjr char *rrpout; 11693032Simp{ 11793032Simp char *rrpoutstart; 11893032Simp 11993032Simp *rrpout = *rrpin; 12093032Simp for (rrpoutstart = rrpout; *rrpin != '\0'; *rrpout++ = *rrpin++) { 12193032Simp 122103177Stjr /* skip all double slashes */ 123101776Stjr while (*rrpin == '/' && *(rrpin + 1) == '/') 124103177Stjr rrpin++; 12593032Simp } 12693032Simp 12793032Simp /* remove trailing slash if necessary */ 12893032Simp if (rrpout - rrpoutstart > 1 && *(rrpout - 1) == '/') 12993032Simp *(rrpout - 1) = '\0'; 13093032Simp else 131103218Stjr *rrpout = '\0'; 132103218Stjr} 13393032Simp 13493032Simpvoid 13593032Simpcheckpath(path, resolved) 13693032Simp const char *path; 13793032Simp char *resolved; 13893032Simp{ 13993032Simp struct stat sb; 14093032Simp 14193032Simp if (realpath(path, resolved) != NULL && stat(resolved, &sb) == 0) { 14293032Simp if (!S_ISDIR(sb.st_mode)) 143103058Stjr errx(EX_USAGE, "%s: not a directory", resolved); 144102142Sache } else 145103339Stjr errx(EX_USAGE, "%s: %s", resolved, strerror(errno)); 146103067Stjr} 147103067Stjr