1 /* $NetBSD: fsutil.c,v 1.15 2006/06/05 16:52:05 christos Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 1990, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. 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 34 #include <sys/cdefs.h> 35 #ifndef lint 36 __RCSID("$NetBSD: fsutil.c,v 1.15 2006/06/05 16:52:05 christos Exp $"); 37 #endif /* not lint */ 38 #include <sys/param.h> 39 #include <sys/stat.h> 40 #include <sys/mount.h> 41 42 #include <err.h> 43 #include <fstab.h> 44 #include <paths.h> 45 #include <stdarg.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 50 #include "fsutil.h" 51 52 static const char *dev = NULL; 53 static int preen = 0; 54 55 static void vmsg(int, const char *, va_list) __printflike(2, 0); 56 57 /* 58 * The getfsopt() function checks whether an option is present in 59 * an fstab(5) fs_mntops entry. There are six possible cases: 60 * 61 * fs_mntops getfsopt result 62 * rw,foo foo true 63 * rw,nofoo nofoo true 64 * rw,nofoo foo false 65 * rw,foo nofoo false 66 * rw foo false 67 * rw nofoo false 68 * 69 * This function should be part of and documented in getfsent(3). 70 */ 71 int 72 getfsopt(struct fstab *fs, const char *option) 73 { 74 int negative, found; 75 char *opt, *optbuf; 76 77 if (option[0] == 'n' && option[1] == 'o') { 78 negative = 1; 79 option += 2; 80 } else 81 negative = 0; 82 optbuf = strdup(fs->fs_mntops); 83 found = 0; 84 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 85 if (opt[0] == 'n' && opt[1] == 'o') { 86 if (!strcasecmp(opt + 2, option)) 87 found = negative; 88 } else if (!strcasecmp(opt, option)) 89 found = !negative; 90 } 91 free(optbuf); 92 return (found); 93 } 94 95 void 96 setcdevname(const char *cd, int pr) 97 { 98 dev = cd; 99 preen = pr; 100 } 101 102 const char * 103 cdevname(void) 104 { 105 return dev; 106 } 107 108 static void 109 vmsg(int fatal, const char *fmt, va_list ap) 110 { 111 if (!fatal && preen) 112 (void) printf("%s: ", dev); 113 114 (void) vprintf(fmt, ap); 115 116 if (fatal && preen) 117 (void) printf("\n"); 118 119 if (fatal && preen) { 120 (void) printf( 121 "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 122 dev, getprogname()); 123 exit(8); 124 } 125 } 126 127 /*VARARGS*/ 128 void 129 pfatal(const char *fmt, ...) 130 { 131 va_list ap; 132 133 va_start(ap, fmt); 134 vmsg(1, fmt, ap); 135 va_end(ap); 136 } 137 138 /*VARARGS*/ 139 void 140 pwarn(const char *fmt, ...) 141 { 142 va_list ap; 143 144 va_start(ap, fmt); 145 vmsg(0, fmt, ap); 146 va_end(ap); 147 } 148 149 void 150 perr(const char *fmt, ...) 151 { 152 va_list ap; 153 154 va_start(ap, fmt); 155 vmsg(1, fmt, ap); 156 va_end(ap); 157 } 158 159 void 160 panic(const char *fmt, ...) 161 { 162 va_list ap; 163 164 va_start(ap, fmt); 165 vmsg(1, fmt, ap); 166 va_end(ap); 167 exit(8); 168 } 169 170 const char * 171 devcheck(const char *origname) 172 { 173 struct stat stslash, stchar; 174 175 if (stat("/", &stslash) < 0) { 176 perr("Can't stat `/'"); 177 return (origname); 178 } 179 if (stat(origname, &stchar) < 0) { 180 perr("Can't stat %s\n", origname); 181 return (origname); 182 } 183 if (!S_ISCHR(stchar.st_mode)) { 184 perr("%s is not a char device\n", origname); 185 } 186 return (origname); 187 } 188 189 void * 190 emalloc(size_t s) 191 { 192 void *p; 193 194 p = malloc(s); 195 if (p == NULL) 196 err(1, "malloc failed"); 197 return (p); 198 } 199 200 201 void * 202 erealloc(void *p, size_t s) 203 { 204 void *q; 205 206 q = realloc(p, s); 207 if (q == NULL) 208 err(1, "realloc failed"); 209 return (q); 210 } 211 212 213 char * 214 estrdup(const char *s) 215 { 216 char *p; 217 218 p = strdup(s); 219 if (p == NULL) 220 err(1, "strdup failed"); 221 return (p); 222 } 223