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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: src/sbin/fsck/fsutil.c,v 1.2.2.1 2001/08/01 05:47:55 obrien Exp $ 32 */ 33 34 #include <stdio.h> 35 #include <string.h> 36 #include <stdlib.h> 37 #include <stdarg.h> 38 #include <errno.h> 39 #include <fstab.h> 40 #include <err.h> 41 #include <paths.h> 42 43 #include <sys/param.h> 44 #include <sys/stat.h> 45 #include <sys/mount.h> 46 47 #include "fsutil.h" 48 49 static const char *dev = NULL; 50 static int hot = 0; 51 static int preen = 0; 52 53 extern char *__progname; 54 55 static void vmsg(int, const char *, va_list) __printflike(2, 0); 56 57 void 58 setcdevname(const char *cd, int pr) 59 { 60 dev = cd; 61 preen = pr; 62 } 63 64 const char * 65 cdevname(void) 66 { 67 return dev; 68 } 69 70 int 71 hotroot(void) 72 { 73 return hot; 74 } 75 76 /*VARARGS*/ 77 void 78 errexit(const char *fmt, ...) 79 { 80 va_list ap; 81 82 va_start(ap, fmt); 83 vfprintf(stderr, fmt, ap); 84 va_end(ap); 85 exit(8); 86 } 87 88 static void 89 vmsg(int fatal, const char *fmt, va_list ap) 90 { 91 if (!fatal && preen) 92 printf("%s: ", dev); 93 94 vprintf(fmt, ap); 95 96 if (fatal && preen) 97 printf("\n"); 98 99 if (fatal && preen) { 100 printf( 101 "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 102 dev, __progname); 103 exit(8); 104 } 105 } 106 107 /*VARARGS*/ 108 void 109 pfatal(const char *fmt, ...) 110 { 111 va_list ap; 112 113 va_start(ap, fmt); 114 vmsg(1, fmt, ap); 115 va_end(ap); 116 } 117 118 /*VARARGS*/ 119 void 120 pwarn(const char *fmt, ...) 121 { 122 va_list ap; 123 va_start(ap, fmt); 124 vmsg(0, fmt, ap); 125 va_end(ap); 126 } 127 128 void 129 perror(const char *s) 130 { 131 pfatal("%s (%s)", s, strerror(errno)); 132 } 133 134 void 135 panic(const char *fmt, ...) 136 { 137 va_list ap; 138 139 va_start(ap, fmt); 140 vmsg(1, fmt, ap); 141 va_end(ap); 142 exit(8); 143 } 144 145 const char * 146 unrawname(const char *name) 147 { 148 static char unrawbuf[32]; 149 const char *dp; 150 struct stat stb; 151 152 if ((dp = strrchr(name, '/')) == NULL) 153 return (name); 154 if (stat(name, &stb) < 0) 155 return (name); 156 if (!S_ISCHR(stb.st_mode)) 157 return (name); 158 if (dp[1] != 'r') 159 return (name); 160 snprintf(unrawbuf, 32, "%.*s/%s", (int)(dp - name), name, dp + 2); 161 return (unrawbuf); 162 } 163 164 const char * 165 rawname(const char *name) 166 { 167 static char rawbuf[32]; 168 const char *dp; 169 170 if ((dp = strrchr(name, '/')) == NULL) 171 return (0); 172 snprintf(rawbuf, 32, "%.*s/r%s", (int)(dp - name), name, dp + 1); 173 return (rawbuf); 174 } 175 176 const char * 177 devcheck(const char *origname) 178 { 179 struct stat stslash, stchar; 180 181 if (stat("/", &stslash) < 0) { 182 perror("/"); 183 printf("Can't stat root\n"); 184 return (origname); 185 } 186 if (stat(origname, &stchar) < 0) { 187 perror(origname); 188 printf("Can't stat %s\n", origname); 189 return (origname); 190 } 191 if (!S_ISCHR(stchar.st_mode)) { 192 perror(origname); 193 printf("%s is not a char device\n", origname); 194 } 195 return (origname); 196 } 197 198 /* 199 * Get the mount point information for name. 200 */ 201 struct statfs * 202 getmntpt(const char *name) 203 { 204 struct stat devstat, mntdevstat; 205 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 206 char *devname; 207 struct statfs *mntbuf, *statfsp; 208 int i, mntsize, isdev; 209 210 if (stat(name, &devstat) != 0) 211 return (NULL); 212 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 213 isdev = 1; 214 else 215 isdev = 0; 216 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 217 for (i = 0; i < mntsize; i++) { 218 statfsp = &mntbuf[i]; 219 devname = statfsp->f_mntfromname; 220 if (*devname != '/') { 221 strcpy(device, _PATH_DEV); 222 strcat(device, devname); 223 strcpy(statfsp->f_mntfromname, device); 224 } 225 if (isdev == 0) { 226 if (strcmp(name, statfsp->f_mntonname)) 227 continue; 228 return (statfsp); 229 } 230 if (stat(devname, &mntdevstat) == 0 && 231 mntdevstat.st_rdev == devstat.st_rdev) 232 return (statfsp); 233 } 234 statfsp = NULL; 235 return (statfsp); 236 } 237 238 #if 0 239 /* 240 * XXX this code is from NetBSD, but fails in FreeBSD because we 241 * don't have blockdevs. I don't think its needed. 242 */ 243 const char * 244 blockcheck(const char *origname) 245 { 246 struct stat stslash, stblock, stchar; 247 const 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 #endif 295 296