getmntopts.c revision 114589
11558Srgrimes/*- 21558Srgrimes * Copyright (c) 1994 31558Srgrimes * The Regents of the University of California. All rights reserved. 41558Srgrimes * 51558Srgrimes * Redistribution and use in source and binary forms, with or without 61558Srgrimes * modification, are permitted provided that the following conditions 71558Srgrimes * are met: 81558Srgrimes * 1. Redistributions of source code must retain the above copyright 91558Srgrimes * notice, this list of conditions and the following disclaimer. 101558Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111558Srgrimes * notice, this list of conditions and the following disclaimer in the 121558Srgrimes * documentation and/or other materials provided with the distribution. 131558Srgrimes * 3. All advertising materials mentioning features or use of this software 141558Srgrimes * must display the following acknowledgement: 151558Srgrimes * This product includes software developed by the University of 161558Srgrimes * California, Berkeley and its contributors. 171558Srgrimes * 4. Neither the name of the University nor the names of its contributors 181558Srgrimes * may be used to endorse or promote products derived from this software 191558Srgrimes * without specific prior written permission. 201558Srgrimes * 211558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311558Srgrimes * SUCH DAMAGE. 321558Srgrimes */ 331558Srgrimes 34114589Sobrien#if 0 351558Srgrimes#ifndef lint 3623678Speterstatic char sccsid[] = "@(#)getmntopts.c 8.3 (Berkeley) 3/29/95"; 37114589Sobrien#endif /* not lint */ 3828671Ssteve#endif 39114589Sobrien#include <sys/cdefs.h> 40114589Sobrien__FBSDID("$FreeBSD: head/sbin/mount/getmntopts.c 114589 2003-05-03 18:41:59Z obrien $"); 411558Srgrimes 421558Srgrimes#include <sys/param.h> 4352055Sphk#include <sys/stat.h> 441558Srgrimes 451558Srgrimes#include <err.h> 4652055Sphk#include <errno.h> 471558Srgrimes#include <stdlib.h> 481558Srgrimes#include <string.h> 4952055Sphk#include <sysexits.h> 501558Srgrimes 511558Srgrimes#include "mntopts.h" 521558Srgrimes 534065Swollmanint getmnt_silent = 0; 544065Swollman 551558Srgrimesvoid 564065Swollmangetmntopts(options, m0, flagp, altflagp) 571558Srgrimes const char *options; 581558Srgrimes const struct mntopt *m0; 591558Srgrimes int *flagp; 604065Swollman int *altflagp; 611558Srgrimes{ 621558Srgrimes const struct mntopt *m; 633202Sache int negative, len; 6423678Speter char *opt, *optbuf, *p; 654065Swollman int *thisflagp; 661558Srgrimes 671558Srgrimes /* Copy option string, since it is about to be torn asunder... */ 681558Srgrimes if ((optbuf = strdup(options)) == NULL) 691558Srgrimes err(1, NULL); 701558Srgrimes 711558Srgrimes for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 721558Srgrimes /* Check for "no" prefix. */ 731558Srgrimes if (opt[0] == 'n' && opt[1] == 'o') { 741558Srgrimes negative = 1; 751558Srgrimes opt += 2; 761558Srgrimes } else 771558Srgrimes negative = 0; 781558Srgrimes 7923678Speter /* 8023678Speter * for options with assignments in them (ie. quotas) 8123678Speter * ignore the assignment as it's handled elsewhere 8223678Speter */ 8323678Speter p = strchr(opt, '='); 8423678Speter if (p) 8525301Smsmith *++p = '\0'; 8623678Speter 871558Srgrimes /* Scan option table. */ 883202Sache for (m = m0; m->m_option != NULL; ++m) { 893202Sache len = strlen(m->m_option); 903202Sache if (strncasecmp(opt, m->m_option, len) == 0) 913202Sache if ( m->m_option[len] == '\0' 923202Sache || m->m_option[len] == '=' 933202Sache ) 941558Srgrimes break; 953202Sache } 961558Srgrimes 9737425Scharnier /* Save flag, or fail if option is not recognized. */ 981558Srgrimes if (m->m_option) { 994065Swollman thisflagp = m->m_altloc ? altflagp : flagp; 1001558Srgrimes if (negative == m->m_inverse) 1014065Swollman *thisflagp |= m->m_flag; 1021558Srgrimes else 1034065Swollman *thisflagp &= ~m->m_flag; 10423678Speter } else if (!getmnt_silent) { 1051558Srgrimes errx(1, "-o %s: option not supported", opt); 1064065Swollman } 1071558Srgrimes } 1081558Srgrimes 1091558Srgrimes free(optbuf); 1101558Srgrimes} 11152055Sphk 11252055Sphkvoid 11352055Sphkrmslashes(rrpin, rrpout) 11452055Sphk char *rrpin; 11552055Sphk char *rrpout; 11652055Sphk{ 11752055Sphk char *rrpoutstart; 11852055Sphk 11952055Sphk *rrpout = *rrpin; 12052055Sphk for (rrpoutstart = rrpout; *rrpin != '\0'; *rrpout++ = *rrpin++) { 12152055Sphk 12252055Sphk /* skip all double slashes */ 12352055Sphk while (*rrpin == '/' && *(rrpin + 1) == '/') 12452055Sphk rrpin++; 12552055Sphk } 12652055Sphk 12752055Sphk /* remove trailing slash if necessary */ 12852055Sphk if (rrpout - rrpoutstart > 1 && *(rrpout - 1) == '/') 12952055Sphk *(rrpout - 1) = '\0'; 13052055Sphk else 13152055Sphk *rrpout = '\0'; 13252055Sphk} 13352055Sphk 13452055Sphkvoid 13552055Sphkcheckpath(path, resolved) 13652055Sphk const char *path; 13752055Sphk char *resolved; 13852055Sphk{ 13952055Sphk struct stat sb; 14052055Sphk 14152055Sphk if (realpath(path, resolved) != NULL && stat(resolved, &sb) == 0) { 14252055Sphk if (!S_ISDIR(sb.st_mode)) 14352055Sphk errx(EX_USAGE, "%s: not a directory", resolved); 14452055Sphk } else 14552055Sphk errx(EX_USAGE, "%s: %s", resolved, strerror(errno)); 14652055Sphk} 147