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 * @(#)getmntopts.c 8.3 (Berkeley) 3/29/95 34 * $FreeBSD: src/sbin/mount/getmntopts.c,v 1.9 1999/10/09 11:54:06 phk Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/stat.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <mntopts.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <sysexits.h> 46 47 int getmnt_silent = 0; 48 49 void 50 getmntopts(const char *options, const struct mntopt *m0, int *flagp, 51 int *altflagp) 52 { 53 const struct mntopt *m; 54 int negative; 55 char *opt, *optbuf, *p; 56 int *thisflagp; 57 58 /* Copy option string, since it is about to be torn asunder... */ 59 if ((optbuf = strdup(options)) == NULL) 60 err(1, NULL); 61 62 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 63 /* Check for "no" prefix. */ 64 if (opt[0] == 'n' && opt[1] == 'o') { 65 negative = 1; 66 opt += 2; 67 } else 68 negative = 0; 69 70 /* 71 * for options with assignments in them (ie. quotas) 72 * ignore the assignment as it's handled elsewhere 73 */ 74 p = strchr(opt, '='); 75 if (p) 76 *++p = '\0'; 77 78 /* Scan option table. */ 79 for (m = m0; m->m_option != NULL; ++m) { 80 if (strcasecmp(opt, m->m_option) == 0) 81 break; 82 } 83 84 /* Save flag, or fail if option is not recognized. */ 85 if (m->m_option) { 86 thisflagp = m->m_altloc ? altflagp : flagp; 87 if (negative == m->m_inverse) 88 *thisflagp |= m->m_flag; 89 else 90 *thisflagp &= ~m->m_flag; 91 } else if (!getmnt_silent) { 92 errx(1, "-o %s: option not supported", opt); 93 } 94 } 95 96 free(optbuf); 97 } 98 99 void 100 rmslashes(char *rrpin, char *rrpout) 101 { 102 char *rrpoutstart; 103 104 *rrpout = *rrpin; 105 for (rrpoutstart = rrpout; *rrpin != '\0'; *rrpout++ = *rrpin++) { 106 107 /* skip all double slashes */ 108 while (*rrpin == '/' && *(rrpin + 1) == '/') 109 rrpin++; 110 } 111 112 /* remove trailing slash if necessary */ 113 if (rrpout - rrpoutstart > 1 && *(rrpout - 1) == '/') 114 *(rrpout - 1) = '\0'; 115 else 116 *rrpout = '\0'; 117 } 118 119 void 120 checkpath(const char *path, char *resolved) 121 { 122 struct stat sb; 123 124 if (realpath(path, resolved) != NULL && stat(resolved, &sb) == 0) { 125 if (!S_ISDIR(sb.st_mode)) 126 errx(EX_USAGE, "%s: not a directory", resolved); 127 } else 128 errx(EX_USAGE, "%s: %s", resolved, strerror(errno)); 129 } 130