1 /* $NetBSD: fsutil.c,v 1.12 2003/03/28 08:12:38 perseant Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __RCSID("$NetBSD: fsutil.c,v 1.12 2003/03/28 08:12:38 perseant Exp $"); 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 43 #include <stdio.h> 44 #include <string.h> 45 #include <stdlib.h> 46 #include <stdarg.h> 47 #include <errno.h> 48 #include <fstab.h> 49 #include <err.h> 50 51 #include <sys/types.h> 52 #include <sys/stat.h> 53 54 #include "fsutil.h" 55 56 static const char *dev = NULL; 57 static int hot = 0; 58 static int preen = 0; 59 60 void 61 setcdevname(const char *cd, int pr) 62 { 63 64 dev = cd; 65 preen = pr; 66 } 67 68 const char * 69 cdevname(void) 70 { 71 72 return dev; 73 } 74 75 int 76 hotroot(void) 77 { 78 79 return hot; 80 } 81 82 /*VARARGS*/ 83 void 84 errexit(const char *fmt, ...) 85 { 86 va_list ap; 87 88 va_start(ap, fmt); 89 (void) vfprintf(stderr, fmt, ap); 90 va_end(ap); 91 exit(8); 92 } 93 94 void 95 vmsg(int fatal, const char *fmt, va_list ap) 96 { 97 98 if (!fatal && preen) 99 (void) printf("%s: ", dev); 100 101 (void) vprintf(fmt, ap); 102 103 if (fatal && preen) 104 (void) printf("\n"); 105 106 if (fatal && preen) { 107 (void) printf( 108 "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 109 dev, getprogname()); 110 exit(8); 111 } 112 } 113 114 /*VARARGS*/ 115 void 116 pfatal(const char *fmt, ...) 117 { 118 va_list ap; 119 120 va_start(ap, fmt); 121 vmsg(1, fmt, ap); 122 va_end(ap); 123 } 124 125 /*VARARGS*/ 126 void 127 pwarn(const char *fmt, ...) 128 { 129 va_list ap; 130 131 va_start(ap, fmt); 132 vmsg(0, fmt, ap); 133 va_end(ap); 134 } 135 136 void 137 perror(const char *s) 138 { 139 140 pfatal("%s (%s)", s, strerror(errno)); 141 } 142 143 void 144 panic(const char *fmt, ...) 145 { 146 va_list ap; 147 148 va_start(ap, fmt); 149 vmsg(1, fmt, ap); 150 va_end(ap); 151 exit(8); 152 } 153 154 const char * 155 unrawname(const char *name) 156 { 157 static char unrawbuf[MAXPATHLEN]; 158 const char *dp; 159 struct stat stb; 160 161 if ((dp = strrchr(name, '/')) == 0) 162 return (name); 163 if (stat(name, &stb) < 0) 164 return (name); 165 if (!S_ISCHR(stb.st_mode)) 166 return (name); 167 if (dp[1] != 'r') 168 return (name); 169 (void)snprintf(unrawbuf, sizeof(unrawbuf), "%.*s/%s", 170 (int)(dp - name), name, dp + 2); 171 return (unrawbuf); 172 } 173 174 const char * 175 rawname(const char *name) 176 { 177 static char rawbuf[MAXPATHLEN]; 178 const char *dp; 179 180 if ((dp = strrchr(name, '/')) == 0) 181 return (0); 182 (void)snprintf(rawbuf, sizeof(rawbuf), "%.*s/r%s", 183 (int)(dp - name), name, dp + 1); 184 return (rawbuf); 185 } 186 187 const char * 188 blockcheck(const char *origname) 189 { 190 struct stat stslash, stblock, stchar; 191 const char *newname, *raw; 192 struct fstab *fsp; 193 int retried = 0; 194 195 hot = 0; 196 if (stat("/", &stslash) < 0) { 197 perror("/"); 198 printf("Can't stat root\n"); 199 return (origname); 200 } 201 newname = origname; 202 retry: 203 if (stat(newname, &stblock) < 0) { 204 perror(newname); 205 printf("Can't stat %s\n", newname); 206 return (origname); 207 } 208 if (S_ISBLK(stblock.st_mode)) { 209 if (stslash.st_dev == stblock.st_rdev) 210 hot++; 211 raw = rawname(newname); 212 if (stat(raw, &stchar) < 0) { 213 perror(raw); 214 printf("Can't stat %s\n", raw); 215 return (origname); 216 } 217 if (S_ISCHR(stchar.st_mode)) { 218 return (raw); 219 } else { 220 printf("%s is not a character device\n", raw); 221 return (origname); 222 } 223 } else if (S_ISCHR(stblock.st_mode) && !retried) { 224 newname = unrawname(newname); 225 retried++; 226 goto retry; 227 } else if ((fsp = getfsfile(newname)) != 0 && !retried) { 228 newname = fsp->fs_spec; 229 retried++; 230 goto retry; 231 } 232 /* 233 * Not a block or character device, just return name and 234 * let the user decide whether to use it. 235 */ 236 return (origname); 237 } 238 239 240 void * 241 emalloc(size_t s) 242 { 243 void *p; 244 245 p = malloc(s); 246 if (p == NULL) 247 err(1, "malloc failed"); 248 return (p); 249 } 250 251 252 void * 253 erealloc(void *p, size_t s) 254 { 255 void *q; 256 257 q = realloc(p, s); 258 if (q == NULL) 259 err(1, "realloc failed"); 260 return (q); 261 } 262 263 264 char * 265 estrdup(const char *s) 266 { 267 char *p; 268 269 p = strdup(s); 270 if (p == NULL) 271 err(1, "strdup failed"); 272 return (p); 273 } 274