sbin/fsck/fsutil.c

   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: src/sbin/fsck/fsutil.c,v 1.2.2.1 2001/08/01 05:47:55 obrien Exp $
  36  * $DragonFly: src/sbin/fsck/fsutil.c,v 1.6 2006/10/12 04:04:03 dillon Exp $
  37  *
  38  * $NetBSD: fsutil.c,v 1.7 1998/07/30 17:41:03 thorpej Exp $
  39  */
  40
  41 #include <sys/cdefs.h>
  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(int, const char *, va_list);
  69
  70 void
  71 setcdevname(const char *cd, int pr)
  72 {
  73         dev = cd;
  74         preen = pr;
  75 }
  76
  77 const char *
  78 cdevname(void)
  79 {
  80         return dev;
  81 }
  82
  83 int
  84 hotroot(void)
  85 {
  86         return hot;
  87 }
  88
  89 /*VARARGS*/
  90 void
  91 errexit(const char *fmt, ...)
  92 {
  93         va_list ap;
  94
  95         va_start(ap, fmt);
  96         vfprintf(stderr, fmt, ap);
  97         va_end(ap);
  98         exit(8);
  99 }
 100
 101 static void
 102 vmsg(int fatal, const char *fmt, va_list ap)
 103 {
 104         if (!fatal && preen)
 105                 printf("%s: ", dev);
 106
 107         vprintf(fmt, ap);
 108
 109         if (fatal && preen)
 110                 printf("\n");
 111
 112         if (fatal && preen) {
 113                 printf(
 114                     "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n",
 115                     dev, __progname);
 116                 exit(8);
 117         }
 118 }
 119
 120 /*VARARGS*/
 121 void
 122 pfatal(const char *fmt, ...)
 123 {
 124         va_list ap;
 125
 126         va_start(ap, fmt);
 127         vmsg(1, fmt, ap);
 128         va_end(ap);
 129 }
 130
 131 /*VARARGS*/
 132 void
 133 pwarn(const char *fmt, ...)
 134 {
 135         va_list ap;
 136         va_start(ap, fmt);
 137         vmsg(0, fmt, ap);
 138         va_end(ap);
 139 }
 140
 141 void
 142 perror(const char *s)
 143 {
 144         pfatal("%s (%s)", s, strerror(errno));
 145 }
 146
 147 void
 148 panic(const char *fmt, ...)
 149 {
 150         va_list ap;
 151
 152         va_start(ap, fmt);
 153         vmsg(1, fmt, ap);
 154         va_end(ap);
 155         exit(8);
 156 }
 157
 158 const char *
 159 unrawname(const char *name)
 160 {
 161         static char unrawbuf[32];
 162         const char *dp;
 163         struct stat stb;
 164
 165         if ((dp = strrchr(name, '/')) == 0)
 166                 return (name);
 167         if (stat(name, &stb) < 0)
 168                 return (name);
 169         if (!S_ISCHR(stb.st_mode))
 170                 return (name);
 171         if (dp[1] != 'r')
 172                 return (name);
 173         snprintf(unrawbuf, 32, "%.*s/%s", (int)(dp - name), name, dp + 2);
 174         return (unrawbuf);
 175 }
 176
 177 const char *
 178 rawname(const char *name)
 179 {
 180         static char rawbuf[32];
 181         const char *dp;
 182
 183         if ((dp = strrchr(name, '/')) == 0)
 184                 return (0);
 185         snprintf(rawbuf, 32, "%.*s/r%s", (int)(dp - name), name, dp + 1);
 186         return (rawbuf);
 187 }
 188
 189 const char *
 190 devcheck(const char *origname)
 191 {
 192         struct stat stslash, stchar;
 193
 194         if (stat("/", &stslash) < 0) {
 195                 perror("/");
 196                 printf("Can't stat root\n");
 197                 return (origname);
 198         }
 199         if (stat(origname, &stchar) < 0) {
 200                 perror(origname);
 201                 printf("Can't stat %s\n", origname);
 202                 return (origname);
 203         }
 204         if (!S_ISCHR(stchar.st_mode)) {
 205                 perror(origname);
 206                 printf("%s is not a char device\n", origname);
 207         }
 208         return (origname);
 209 }
 210
 211 /*
 212  * Get the mount point information for name.
 213  */
 214 struct statfs *
 215 getmntpt(const char *name)
 216 {
 217         struct stat devstat, mntdevstat;
 218         char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
 219         char *devname;
 220         struct statfs *mntbuf, *statfsp;
 221         int i, mntsize, isdev;
 222
 223         if (stat(name, &devstat) != 0)
 224                 return (NULL);
 225         if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
 226                 isdev = 1;
 227         else
 228                 isdev = 0;
 229         mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
 230         for (i = 0; i < mntsize; i++) {
 231                 statfsp = &mntbuf[i];
 232                 devname = statfsp->f_mntfromname;
 233                 if (*devname != '/') {
 234                         strcpy(device, _PATH_DEV);
 235                         strcat(device, devname);
 236                         strcpy(statfsp->f_mntfromname, device);
 237                 }
 238                 if (isdev == 0) {
 239                         if (strcmp(name, statfsp->f_mntonname))
 240                                 continue;
 241                         return (statfsp);
 242                 }
 243                 if (stat(devname, &mntdevstat) == 0 &&
 244                     mntdevstat.st_rdev == devstat.st_rdev)
 245                         return (statfsp);
 246         }
 247         statfsp = NULL;
 248         return (statfsp);
 249 }
 250
 251 #if 0
 252 /*
 253  * XXX this code is from NetBSD, but fails in FreeBSD because we
 254  * don't have blockdevs. I don't think its needed.
 255  */
 256 const char *
 257 blockcheck(const char *origname)
 258 {
 259         struct stat stslash, stblock, stchar;
 260         const char *newname, *raw;
 261         struct fstab *fsp;
 262         int retried = 0;
 263
 264         hot = 0;
 265         if (stat("/", &stslash) < 0) {
 266                 perror("/");
 267                 printf("Can't stat root\n");
 268                 return (origname);
 269         }
 270         newname = origname;
 271 retry:
 272         if (stat(newname, &stblock) < 0) {
 273                 perror(newname);
 274                 printf("Can't stat %s\n", newname);
 275                 return (origname);
 276         }
 277         if (S_ISBLK(stblock.st_mode)) {
 278                 if (stslash.st_dev == stblock.st_rdev)
 279                         hot++;
 280                 raw = rawname(newname);
 281                 if (stat(raw, &stchar) < 0) {
 282                         perror(raw);
 283                         printf("Can't stat %s\n", raw);
 284                         return (origname);
 285                 }
 286                 if (S_ISCHR(stchar.st_mode)) {
 287                         return (raw);
 288                 } else {
 289                         printf("%s is not a character device\n", raw);
 290                         return (origname);
 291                 }
 292         } else if (S_ISCHR(stblock.st_mode) && !retried) {
 293                 newname = unrawname(newname);
 294                 retried++;
 295                 goto retry;
 296         } else if ((fsp = getfsfile(newname)) != 0 && !retried) {
 297                 newname = fsp->fs_spec;
 298                 retried++;
 299                 goto retry;
 300         }
 301         /*
 302          * Not a block or character device, just return name and
 303          * let the user decide whether to use it.
 304          */
 305         return (origname);
 306 }
 307 #endif
 308