1 /* $NetBSD: fsutil.c,v 1.3 1996/10/22 16:57:51 christos 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 #ifndef lint 36 static char rcsid[] = "$NetBSD: fsutil.c,v 1.3 1996/10/22 16:57:51 christos Exp $"; 37 #endif /* not lint */ 38 39 #include <stdio.h> 40 #include <string.h> 41 #include <stdlib.h> 42 #if __STDC__ 43 #include <stdarg.h> 44 #else 45 #include <varargs.h> 46 #endif 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 extern char *__progname; 61 62 static void vmsg __P((int, const char *, va_list)); 63 64 void 65 setcdevname(cd, pr) 66 const char *cd; 67 int pr; 68 { 69 dev = cd; 70 preen = pr; 71 } 72 73 const char * 74 cdevname() 75 { 76 return dev; 77 } 78 79 int 80 hotroot() 81 { 82 return hot; 83 } 84 85 /*VARARGS*/ 86 void 87 #if __STDC__ 88 errexit(const char *fmt, ...) 89 #else 90 errexit(va_alist) 91 va_dcl 92 #endif 93 { 94 va_list ap; 95 96 #if __STDC__ 97 va_start(ap, fmt); 98 #else 99 const char *fmt; 100 101 va_start(ap); 102 fmt = va_arg(ap, const char *); 103 #endif 104 (void) vfprintf(stderr, fmt, ap); 105 va_end(ap); 106 exit(8); 107 } 108 109 static void 110 vmsg(fatal, fmt, ap) 111 int fatal; 112 const char *fmt; 113 va_list ap; 114 { 115 if (!fatal && preen) 116 (void) printf("%s: ", dev); 117 118 (void) vprintf(fmt, ap); 119 120 if (fatal && preen) 121 (void) printf("\n"); 122 123 if (fatal && preen) { 124 (void) printf( 125 "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 126 dev, __progname); 127 exit(8); 128 } 129 } 130 131 /*VARARGS*/ 132 void 133 #if __STDC__ 134 pfatal(const char *fmt, ...) 135 #else 136 pfatal(va_alist) 137 va_dcl 138 #endif 139 { 140 va_list ap; 141 142 #if __STDC__ 143 va_start(ap, fmt); 144 #else 145 const char *fmt; 146 147 va_start(ap); 148 fmt = va_arg(ap, const char *); 149 #endif 150 vmsg(1, fmt, ap); 151 va_end(ap); 152 } 153 154 /*VARARGS*/ 155 void 156 #if __STDC__ 157 pwarn(const char *fmt, ...) 158 #else 159 pwarn(va_alist) 160 va_dcl 161 #endif 162 { 163 va_list ap; 164 #if __STDC__ 165 va_start(ap, fmt); 166 #else 167 const char *fmt; 168 169 va_start(ap); 170 fmt = va_arg(ap, const char *); 171 #endif 172 vmsg(0, fmt, ap); 173 va_end(ap); 174 } 175 176 void 177 perror(s) 178 const char *s; 179 { 180 pfatal("%s (%s)", s, strerror(errno)); 181 } 182 183 void 184 #if __STDC__ 185 panic(const char *fmt, ...) 186 #else 187 panic(va_alist) 188 va_dcl 189 #endif 190 { 191 va_list ap; 192 193 #if __STDC__ 194 va_start(ap, fmt); 195 #else 196 const char *fmt; 197 198 va_start(ap); 199 fmt = va_arg(ap, const char *); 200 #endif 201 vmsg(1, fmt, ap); 202 va_end(ap); 203 exit(8); 204 } 205 206 char * 207 unrawname(name) 208 char *name; 209 { 210 char *dp; 211 struct stat stb; 212 213 if ((dp = strrchr(name, '/')) == 0) 214 return (name); 215 if (stat(name, &stb) < 0) 216 return (name); 217 if (!S_ISCHR(stb.st_mode)) 218 return (name); 219 if (dp[1] != 'r') 220 return (name); 221 (void)strcpy(&dp[1], &dp[2]); 222 return (name); 223 } 224 225 char * 226 rawname(name) 227 char *name; 228 { 229 static char rawbuf[32]; 230 char *dp; 231 232 if ((dp = strrchr(name, '/')) == 0) 233 return (0); 234 *dp = 0; 235 (void)strcpy(rawbuf, name); 236 *dp = '/'; 237 (void)strcat(rawbuf, "/r"); 238 (void)strcat(rawbuf, &dp[1]); 239 return (rawbuf); 240 } 241 242 char * 243 blockcheck(origname) 244 char *origname; 245 { 246 struct stat stslash, stblock, stchar; 247 char *newname, *raw; 248 struct fstab *fsp; 249 int retried = 0; 250 251 hot = 0; 252 if (stat("/", &stslash) < 0) { 253 perror("/"); 254 printf("Can't stat root\n"); 255 return (origname); 256 } 257 newname = origname; 258 retry: 259 if (stat(newname, &stblock) < 0) { 260 perror(newname); 261 printf("Can't stat %s\n", newname); 262 return (origname); 263 } 264 if (S_ISBLK(stblock.st_mode)) { 265 if (stslash.st_dev == stblock.st_rdev) 266 hot++; 267 raw = rawname(newname); 268 if (stat(raw, &stchar) < 0) { 269 perror(raw); 270 printf("Can't stat %s\n", raw); 271 return (origname); 272 } 273 if (S_ISCHR(stchar.st_mode)) { 274 return (raw); 275 } else { 276 printf("%s is not a character device\n", raw); 277 return (origname); 278 } 279 } else if (S_ISCHR(stblock.st_mode) && !retried) { 280 newname = unrawname(newname); 281 retried++; 282 goto retry; 283 } else if ((fsp = getfsfile(newname)) != 0 && !retried) { 284 newname = fsp->fs_spec; 285 retried++; 286 goto retry; 287 } 288 /* 289 * Not a block or character device, just return name and 290 * let the user decide whether to use it. 291 */ 292 return (origname); 293 } 294 295 296 void * 297 emalloc(s) 298 size_t s; 299 { 300 void *p = malloc(s); 301 if (p == NULL) 302 err(1, "malloc failed"); 303 return p; 304 } 305 306 307 void * 308 erealloc(p, s) 309 void *p; 310 size_t s; 311 { 312 p = realloc(p, s); 313 if (p == NULL) 314 err(1, "realloc failed"); 315 return p; 316 } 317 318 319 char * 320 estrdup(s) 321 const char *s; 322 { 323 char *p = strdup(s); 324 if (p == NULL) 325 err(1, "strdup failed"); 326 return p; 327 } 328