1 /* $NetBSD: fsutil.c,v 1.7 1998/07/30 17:41:03 thorpej 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 * $FreeBSD$ 36 */ 37 38 #include <sys/cdefs.h> 39 #ifndef lint 40 __RCSID("$NetBSD: fsutil.c,v 1.7 1998/07/30 17:41:03 thorpej Exp $"); 41 #endif /* not lint */ 42 43 #include <stdio.h> 44 #include <string.h> 45 #include <stdlib.h> 46 #if __STDC__ 47 #include <stdarg.h> 48 #else 49 #include <varargs.h> 50 #endif 51 #include <errno.h> 52 #include <fstab.h> 53 #include <err.h> 54 #include <paths.h> 55 56 #include <sys/param.h> 57 #include <sys/stat.h> 58 #include <sys/mount.h> 59 60 #include "fsutil.h" 61 62 static const char *dev = NULL; 63 static int hot = 0; 64 static int preen = 0; 65 66 extern char *__progname; 67 68 static void vmsg __P((int, const char *, va_list)); 69 70 void 71 setcdevname(cd, pr) 72 const char *cd; 73 int pr; 74 { 75 dev = cd; 76 preen = pr; 77 } 78 79 const char * 80 cdevname() 81 { 82 return dev; 83 } 84 85 int 86 hotroot() 87 { 88 return hot; 89 } 90 91 /*VARARGS*/ 92 void 93 #if __STDC__ 94 errexit(const char *fmt, ...) 95 #else 96 errexit(va_alist) 97 va_dcl 98 #endif 99 { 100 va_list ap; 101 102 #if __STDC__ 103 va_start(ap, fmt); 104 #else 105 const char *fmt; 106 107 va_start(ap); 108 fmt = va_arg(ap, const char *); 109 #endif 110 (void) vfprintf(stderr, fmt, ap); 111 va_end(ap); 112 exit(8); 113 } 114 115 static void 116 vmsg(fatal, fmt, ap) 117 int fatal; 118 const char *fmt; 119 va_list ap; 120 { 121 if (!fatal && preen) 122 (void) printf("%s: ", dev); 123 124 (void) vprintf(fmt, ap); 125 126 if (fatal && preen) 127 (void) printf("\n"); 128 129 if (fatal && preen) { 130 (void) printf( 131 "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 132 dev, __progname); 133 exit(8); 134 } 135 } 136 137 /*VARARGS*/ 138 void 139 #if __STDC__ 140 pfatal(const char *fmt, ...) 141 #else 142 pfatal(va_alist) 143 va_dcl 144 #endif 145 { 146 va_list ap; 147 148 #if __STDC__ 149 va_start(ap, fmt); 150 #else 151 const char *fmt; 152 153 va_start(ap); 154 fmt = va_arg(ap, const char *); 155 #endif 156 vmsg(1, fmt, ap); 157 va_end(ap); 158 } 159 160 /*VARARGS*/ 161 void 162 #if __STDC__ 163 pwarn(const char *fmt, ...) 164 #else 165 pwarn(va_alist) 166 va_dcl 167 #endif 168 { 169 va_list ap; 170 #if __STDC__ 171 va_start(ap, fmt); 172 #else 173 const char *fmt; 174 175 va_start(ap); 176 fmt = va_arg(ap, const char *); 177 #endif 178 vmsg(0, fmt, ap); 179 va_end(ap); 180 } 181 182 void 183 perror(s) 184 const char *s; 185 { 186 pfatal("%s (%s)", s, strerror(errno)); 187 } 188 189 void 190 #if __STDC__ 191 panic(const char *fmt, ...) 192 #else 193 panic(va_alist) 194 va_dcl 195 #endif 196 { 197 va_list ap; 198 199 #if __STDC__ 200 va_start(ap, fmt); 201 #else 202 const char *fmt; 203 204 va_start(ap); 205 fmt = va_arg(ap, const char *); 206 #endif 207 vmsg(1, fmt, ap); 208 va_end(ap); 209 exit(8); 210 } 211 212 const char * 213 unrawname(name) 214 const char *name; 215 { 216 static char unrawbuf[32]; 217 const char *dp; 218 struct stat stb; 219 220 if ((dp = strrchr(name, '/')) == 0) 221 return (name); 222 if (stat(name, &stb) < 0) 223 return (name); 224 if (!S_ISCHR(stb.st_mode)) 225 return (name); 226 if (dp[1] != 'r') 227 return (name); 228 (void)snprintf(unrawbuf, 32, "%.*s/%s", (int)(dp - name), name, dp + 2); 229 return (unrawbuf); 230 } 231 232 const char * 233 rawname(name) 234 const char *name; 235 { 236 static char rawbuf[32]; 237 const char *dp; 238 239 if ((dp = strrchr(name, '/')) == 0) 240 return (0); 241 (void)snprintf(rawbuf, 32, "%.*s/r%s", (int)(dp - name), name, dp + 1); 242 return (rawbuf); 243 } 244 245 const char * 246 devcheck(origname) 247 const char *origname; 248 { 249 struct stat stslash, stchar; 250 251 if (stat("/", &stslash) < 0) { 252 perror("/"); 253 printf("Can't stat root\n"); 254 return (origname); 255 } 256 if (stat(origname, &stchar) < 0) { 257 perror(origname); 258 printf("Can't stat %s\n", origname); 259 return (origname); 260 } 261 if (!S_ISCHR(stchar.st_mode)) { 262 perror(origname); 263 printf("%s is not a char device\n", origname); 264 } 265 return (origname); 266 } 267 268 /* 269 * Get the mount point information for name. 270 */ 271 struct statfs * 272 getmntpt(name) 273 const char *name; 274 { 275 struct stat devstat, mntdevstat; 276 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 277 char *devname; 278 struct statfs *mntbuf, *statfsp; 279 int i, mntsize, isdev; 280 281 if (stat(name, &devstat) != 0) 282 return (NULL); 283 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 284 isdev = 1; 285 else 286 isdev = 0; 287 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 288 for (i = 0; i < mntsize; i++) { 289 statfsp = &mntbuf[i]; 290 devname = statfsp->f_mntfromname; 291 if (*devname != '/') { 292 strcpy(device, _PATH_DEV); 293 strcat(device, devname); 294 strcpy(statfsp->f_mntfromname, device); 295 } 296 if (isdev == 0) { 297 if (strcmp(name, statfsp->f_mntonname)) 298 continue; 299 return (statfsp); 300 } 301 if (stat(devname, &mntdevstat) == 0 && 302 mntdevstat.st_rdev == devstat.st_rdev) 303 return (statfsp); 304 } 305 statfsp = NULL; 306 return (statfsp); 307 } 308 309 #if 0 310 /* 311 * XXX this code is from NetBSD, but fails in FreeBSD because we 312 * don't have blockdevs. I don't think its needed. 313 */ 314 const char * 315 blockcheck(origname) 316 const char *origname; 317 { 318 struct stat stslash, stblock, stchar; 319 const char *newname, *raw; 320 struct fstab *fsp; 321 int retried = 0; 322 323 hot = 0; 324 if (stat("/", &stslash) < 0) { 325 perror("/"); 326 printf("Can't stat root\n"); 327 return (origname); 328 } 329 newname = origname; 330 retry: 331 if (stat(newname, &stblock) < 0) { 332 perror(newname); 333 printf("Can't stat %s\n", newname); 334 return (origname); 335 } 336 if (S_ISBLK(stblock.st_mode)) { 337 if (stslash.st_dev == stblock.st_rdev) 338 hot++; 339 raw = rawname(newname); 340 if (stat(raw, &stchar) < 0) { 341 perror(raw); 342 printf("Can't stat %s\n", raw); 343 return (origname); 344 } 345 if (S_ISCHR(stchar.st_mode)) { 346 return (raw); 347 } else { 348 printf("%s is not a character device\n", raw); 349 return (origname); 350 } 351 } else if (S_ISCHR(stblock.st_mode) && !retried) { 352 newname = unrawname(newname); 353 retried++; 354 goto retry; 355 } else if ((fsp = getfsfile(newname)) != 0 && !retried) { 356 newname = fsp->fs_spec; 357 retried++; 358 goto retry; 359 } 360 /* 361 * Not a block or character device, just return name and 362 * let the user decide whether to use it. 363 */ 364 return (origname); 365 } 366 #endif 367 368 369 void * 370 emalloc(s) 371 size_t s; 372 { 373 void *p; 374 375 p = malloc(s); 376 if (p == NULL) 377 err(1, "malloc failed"); 378 return (p); 379 } 380 381 382 void * 383 erealloc(p, s) 384 void *p; 385 size_t s; 386 { 387 void *q; 388 389 q = realloc(p, s); 390 if (q == NULL) 391 err(1, "realloc failed"); 392 return (q); 393 } 394 395 396 char * 397 estrdup(s) 398 const char *s; 399 { 400 char *p; 401 402 p = strdup(s); 403 if (p == NULL) 404 err(1, "strdup failed"); 405 return (p); 406 } 407