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. 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