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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)getmntopts.c 8.3 (Berkeley) 3/29/95 30 * $FreeBSD: src/sbin/mount/getmntopts.c,v 1.9 1999/10/09 11:54:06 phk Exp $ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/stat.h> 35 36 #include <err.h> 37 #include <errno.h> 38 #include <mntopts.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <sysexits.h> 42 43 int getmnt_silent = 0; 44 45 void 46 getmntopts(const char *options, const struct mntopt *m0, int *flagp, 47 int *altflagp) 48 { 49 const struct mntopt *m; 50 int negative; 51 char *opt, *optbuf, *p; 52 int *thisflagp; 53 54 /* Copy option string, since it is about to be torn asunder... */ 55 if ((optbuf = strdup(options)) == NULL) 56 err(1, NULL); 57 58 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 59 /* Check for "no" prefix. */ 60 if (opt[0] == 'n' && opt[1] == 'o') { 61 negative = 1; 62 opt += 2; 63 } else 64 negative = 0; 65 66 /* 67 * for options with assignments in them (ie. quotas) 68 * ignore the assignment as it's handled elsewhere 69 */ 70 p = strchr(opt, '='); 71 if (p) 72 *++p = '\0'; 73 74 /* Scan option table. */ 75 for (m = m0; m->m_option != NULL; ++m) { 76 if (strcasecmp(opt, m->m_option) == 0) 77 break; 78 } 79 80 /* Save flag, or fail if option is not recognized. */ 81 if (m->m_option) { 82 thisflagp = m->m_altloc ? altflagp : flagp; 83 if (negative == m->m_inverse) 84 *thisflagp |= m->m_flag; 85 else 86 *thisflagp &= ~m->m_flag; 87 } else if (!getmnt_silent) { 88 errx(1, "-o %s: option not supported", opt); 89 } 90 } 91 92 free(optbuf); 93 } 94 95 void 96 rmslashes(char *rrpin, char *rrpout) 97 { 98 char *rrpoutstart; 99 100 *rrpout = *rrpin; 101 for (rrpoutstart = rrpout; *rrpin != '\0'; *rrpout++ = *rrpin++) { 102 103 /* skip all double slashes */ 104 while (*rrpin == '/' && *(rrpin + 1) == '/') 105 rrpin++; 106 } 107 108 /* remove trailing slash if necessary */ 109 if (rrpout - rrpoutstart > 1 && *(rrpout - 1) == '/') 110 *(rrpout - 1) = '\0'; 111 else 112 *rrpout = '\0'; 113 } 114 115 void 116 checkpath(const char *path, char *resolved) 117 { 118 struct stat sb; 119 120 if (realpath(path, resolved) != NULL && stat(resolved, &sb) == 0) { 121 if (!S_ISDIR(sb.st_mode)) 122 errx(EX_USAGE, "%s: not a directory", resolved); 123 } else 124 errx(EX_USAGE, "%s: %s", resolved, strerror(errno)); 125 } 126