restore/main.c

   1 /*
   2  *      Ported to Linux's Second Extended File System as part of the
   3  *      dump and restore backup suit
   4  *      Remy Card <card@Linux.EU.Org>, 1994-1997
   5  *      Stelian Pop <pop@cybercable.fr>, 1999-2000
   6  */
   7
   8 /*
   9  * Copyright (c) 1983, 1993
  10  *      The Regents of the University of California.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by the University of
  23  *      California, Berkeley and its contributors.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  */
  40
  41 #ifndef lint
  42 static const char rcsid[] =
  43         "$Id: main.c,v 1.9 2000/03/02 11:34:51 stelian Exp $";
  44 #endif /* not lint */
  45
  46 #include <sys/param.h>
  47 #include <sys/stat.h>
  48 #include <errno.h>
  49
  50 #ifdef  __linux__
  51 #include <linux/ext2_fs.h>
  52 #include <bsdcompat.h>
  53 #include <signal.h>
  54 #include <string.h>
  55 #else   /* __linux__ */
  56 #include <ufs/ufs/dinode.h>
  57 #endif  /* __linux__ */
  58 #include <protocols/dumprestore.h>
  59
  60 #include <compaterr.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <unistd.h>
  64
  65 #ifdef  __linux__
  66 #include <ext2fs/ext2fs.h>
  67 #include <getopt.h>
  68 #endif
  69
  70 #include "pathnames.h"
  71 #include "restore.h"
  72 #include "extern.h"
  73
  74 int     bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
  75 int     hflag = 1, mflag = 1, Nflag = 0;
  76 int     uflag = 0;
  77 int     dokerberos = 0;
  78 char    command = '\0';
  79 long    dumpnum = 1;
  80 long    volno = 0;
  81 long    ntrec;
  82 char    *dumpmap;
  83 char    *usedinomap;
  84 ino_t   maxino;
  85 time_t  dumptime;
  86 time_t  dumpdate;
  87 FILE    *terminal;
  88 char    *tmpdir;
  89 int     compare_ignore_not_found;
  90 char    filesys[NAMELEN];
  91
  92 #ifdef  __linux__
  93 char    *__progname;
  94 #endif
  95
  96 static void obsolete __P((int *, char **[]));
  97 static void usage __P((void));
  98
  99 int
 100 main(int argc, char *argv[])
 101 {
 102         int ch;
 103         ino_t ino;
 104         char *inputdev = _PATH_DEFTAPE;
 105         char *symtbl = "./restoresymtable";
 106         char *p, name[MAXPATHLEN];
 107
 108         /* Temp files should *not* be readable.  We set permissions later. */
 109         (void) umask(077);
 110         filesys[0] = '\0';
 111 #ifdef  __linux__
 112         __progname = argv[0];
 113 #endif
 114
 115         if (argc < 2)
 116                 usage();
 117
 118         if ((inputdev = getenv("TAPE")) == NULL)
 119                 inputdev = _PATH_DEFTAPE;
 120         if ((tmpdir = getenv("TMPDIR")) == NULL)
 121                 tmpdir = _PATH_TMP;
 122         if ((tmpdir = strdup(tmpdir)) == NULL)
 123                 err(1, "malloc tmpdir");
 124         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 125                 ;
 126         obsolete(&argc, &argv);
 127 #ifdef KERBEROS
 128 #define optlist "b:CcdD:f:hikmMNRrs:tT:uvxy"
 129 #else
 130 #define optlist "b:CcdD:f:himMNRrs:tT:uvxy"
 131 #endif
 132         while ((ch = getopt(argc, argv, optlist)) != -1)
 133                 switch(ch) {
 134                 case 'b':
 135                         /* Change default tape blocksize. */
 136                         bflag = 1;
 137                         ntrec = strtol(optarg, &p, 10);
 138                         if (*p)
 139                                 errx(1, "illegal blocksize -- %s", optarg);
 140                         if (ntrec <= 0)
 141                                 errx(1, "block size must be greater than 0");
 142                         break;
 143                 case 'c':
 144                         cvtflag = 1;
 145                         break;
 146                 case 'D':
 147                         strncpy(filesys, optarg, NAMELEN);
 148                         filesys[NAMELEN - 1] = '\0';
 149                         break;
 150                 case 'T':
 151                         tmpdir = optarg;
 152                         break;
 153                 case 'd':
 154                         dflag = 1;
 155                         break;
 156                 case 'f':
 157                         inputdev = optarg;
 158                         break;
 159                 case 'h':
 160                         hflag = 0;
 161                         break;
 162 #ifdef KERBEROS
 163                 case 'k':
 164                         dokerberos = 1;
 165                         break;
 166 #endif
 167                 case 'C':
 168                 case 'i':
 169                 case 'R':
 170                 case 'r':
 171                 case 't':
 172                 case 'x':
 173                         if (command != '\0')
 174                                 errx(1,
 175                                     "%c and %c options are mutually exclusive",
 176                                     ch, command);
 177                         command = ch;
 178                         break;
 179                 case 'm':
 180                         mflag = 0;
 181                         break;
 182                 case 'M':
 183                         Mflag = 1;
 184                         break;
 185                 case 'N':
 186                         Nflag = 1;
 187                         break;
 188                 case 's':
 189                         /* Dumpnum (skip to) for multifile dump tapes. */
 190                         dumpnum = strtol(optarg, &p, 10);
 191                         if (*p)
 192                                 errx(1, "illegal dump number -- %s", optarg);
 193                         if (dumpnum <= 0)
 194                                 errx(1, "dump number must be greater than 0");
 195                         break;
 196                 case 'u':
 197                         uflag = 1;
 198                         break;
 199                 case 'v':
 200                         vflag = 1;
 201                         break;
 202                 case 'y':
 203                         yflag = 1;
 204                         break;
 205                 default:
 206                         usage();
 207                 }
 208         argc -= optind;
 209         argv += optind;
 210
 211         if (command == '\0')
 212                 errx(1, "none of C, i, R, r, t or x options specified");
 213
 214         if (signal(SIGINT, onintr) == SIG_IGN)
 215                 (void) signal(SIGINT, SIG_IGN);
 216         if (signal(SIGTERM, onintr) == SIG_IGN)
 217                 (void) signal(SIGTERM, SIG_IGN);
 218         setlinebuf(stderr);
 219
 220         atexit(cleanup);
 221
 222         setinput(inputdev);
 223
 224         if (argc == 0) {
 225                 argc = 1;
 226                 *--argv = ".";
 227         }
 228
 229         switch (command) {
 230         /*
 231          * Compare contents of tape.
 232          */
 233         case 'C': {
 234                 struct stat stbuf;
 235
 236                 Vprintf(stdout, "Begin compare restore\n");
 237                 compare_ignore_not_found = 0;
 238                 setup();
 239                 printf("filesys = %s\n", filesys);
 240                 if (stat(filesys, &stbuf) < 0)
 241                         err(1, "cannot stat directory %s", filesys);
 242                 if (chdir(filesys) < 0)
 243                         err(1, "cannot cd to %s", filesys);
 244                 compare_ignore_not_found = dumptime > 0;
 245                 initsymtable((char *)0);
 246                 extractdirs(0);
 247                 treescan(".", ROOTINO, nodeupdates);
 248                 compareleaves();
 249                 checkrestore();
 250                 break;
 251         }
 252
 253         /*
 254          * Interactive mode.
 255          */
 256         case 'i':
 257                 setup();
 258                 extractdirs(1);
 259                 initsymtable(NULL);
 260                 runcmdshell();
 261                 break;
 262         /*
 263          * Incremental restoration of a file system.
 264          */
 265         case 'r':
 266                 setup();
 267                 if (dumptime > 0) {
 268                         /*
 269                          * This is an incremental dump tape.
 270                          */
 271                         Vprintf(stdout, "Begin incremental restore\n");
 272                         initsymtable(symtbl);
 273                         extractdirs(1);
 274                         removeoldleaves();
 275                         Vprintf(stdout, "Calculate node updates.\n");
 276                         treescan(".", ROOTINO, nodeupdates);
 277                         findunreflinks();
 278                         removeoldnodes();
 279                 } else {
 280                         /*
 281                          * This is a level zero dump tape.
 282                          */
 283                         Vprintf(stdout, "Begin level 0 restore\n");
 284                         initsymtable((char *)0);
 285                         extractdirs(1);
 286                         Vprintf(stdout, "Calculate extraction list.\n");
 287                         treescan(".", ROOTINO, nodeupdates);
 288                 }
 289                 createleaves(symtbl);
 290                 createlinks();
 291                 setdirmodes(FORCE);
 292                 checkrestore();
 293                 if (dflag) {
 294                         Vprintf(stdout, "Verify the directory structure\n");
 295                         treescan(".", ROOTINO, verifyfile);
 296                 }
 297                 dumpsymtable(symtbl, (long)1);
 298                 break;
 299         /*
 300          * Resume an incremental file system restoration.
 301          */
 302         case 'R':
 303                 initsymtable(symtbl);
 304                 skipmaps();
 305                 skipdirs();
 306                 createleaves(symtbl);
 307                 createlinks();
 308                 setdirmodes(FORCE);
 309                 checkrestore();
 310                 dumpsymtable(symtbl, (long)1);
 311                 break;
 312         /*
 313          * List contents of tape.
 314          */
 315         case 't':
 316                 setup();
 317                 extractdirs(0);
 318                 initsymtable((char *)0);
 319                 while (argc--) {
 320                         canon(*argv++, name, sizeof(name));
 321                         ino = dirlookup(name);
 322                         if (ino == 0)
 323                                 continue;
 324                         treescan(name, ino, listfile);
 325                 }
 326                 break;
 327         /*
 328          * Batch extraction of tape contents.
 329          */
 330         case 'x':
 331                 setup();
 332                 extractdirs(1);
 333                 initsymtable((char *)0);
 334                 while (argc--) {
 335                         canon(*argv++, name, sizeof(name));
 336                         ino = dirlookup(name);
 337                         if (ino == 0)
 338                                 continue;
 339                         if (mflag)
 340                                 pathcheck(name);
 341                         treescan(name, ino, addfile);
 342                 }
 343                 createfiles();
 344                 createlinks();
 345                 setdirmodes(0);
 346                 if (dflag)
 347                         checkrestore();
 348                 break;
 349         }
 350         exit(0);
 351         /* NOTREACHED */
 352         return 0;       /* gcc shut up */
 353 }
 354
 355 static void
 356 usage(void)
 357 {
 358 #ifdef KERBEROS
 359 #define kerbflag "k"
 360 #else
 361 #define kerbflag
 362 #endif
 363         (void)fprintf(stderr,
 364           "%s %s\n", __progname, _DUMP_VERSION);
 365         (void)fprintf(stderr,
 366           "usage:\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n",
 367           __progname, " -i [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno]",
 368           __progname, " -r [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno]",
 369           __progname, " -R [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno]",
 370           __progname, " -x [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno] [file ...]",
 371           __progname, " -t [-ch" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [file ...]");
 372         exit(1);
 373 }
 374
 375 /*
 376  * obsolete --
 377  *      Change set of key letters and ordered arguments into something
 378  *      getopt(3) will like.
 379  */
 380 static void
 381 obsolete(int *argcp, char **argvp[])
 382 {
 383         int argc, flags;
 384         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 385
 386         /* Setup. */
 387         argv = *argvp;
 388         argc = *argcp;
 389
 390         /* Return if no arguments or first argument has leading dash. */
 391         ap = argv[1];
 392         if (argc == 1 || *ap == '-')
 393                 return;
 394
 395         /* Allocate space for new arguments. */
 396         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 397             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 398                 err(1, "malloc args");
 399
 400         *nargv++ = *argv;
 401         argv += 2, argc -= 2;
 402
 403         for (flags = 0; *ap; ++ap) {
 404                 switch (*ap) {
 405                 case 'b':
 406                 case 'D':
 407                 case 'f':
 408                 case 's':
 409                 case 'T':
 410                         if (*argv == NULL) {
 411                                 warnx("option requires an argument -- %c", *ap);
 412                                 usage();
 413                         }
 414                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 415                                 err(1, "malloc arg");
 416                         nargv[0][0] = '-';
 417                         nargv[0][1] = *ap;
 418                         (void)strcpy(&nargv[0][2], *argv);
 419                         ++argv;
 420                         ++nargv;
 421                         break;
 422                 default:
 423                         if (!flags) {
 424                                 *p++ = '-';
 425                                 flags = 1;
 426                         }
 427                         *p++ = *ap;
 428                         break;
 429                 }
 430         }
 431
 432         /* Terminate flags. */
 433         if (flags) {
 434                 *p = '\0';
 435                 *nargv++ = flagsp;
 436         }
 437
 438         /* Copy remaining arguments. */
 439         while ((*nargv++ = *argv++));
 440
 441         /* Update argument count. */
 442         *argcp = nargv - *argvp - 1;
 443 }