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@noos.fr>, 1999-2000
   6  *      Stelian Pop <pop@noos.fr> - Alcôve <www.alcove.fr>, 2000
   7  */
   8
   9 /*
  10  * Copyright (c) 1983, 1993
  11  *      The Regents of the University of California.  All rights reserved.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgement:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  */
  41
  42 #ifndef lint
  43 static const char rcsid[] =
  44         "$Id: main.c,v 1.24 2001/04/27 15:22:47 stelian Exp $";
  45 #endif /* not lint */
  46
  47 #include <config.h>
  48 #include <compatlfs.h>
  49 #include <sys/param.h>
  50 #include <sys/stat.h>
  51 #include <errno.h>
  52
  53 #ifdef  __linux__
  54 #include <sys/time.h>
  55 #include <time.h>
  56 #ifdef HAVE_EXT2FS_EXT2_FS_H
  57 #include <ext2fs/ext2_fs.h>
  58 #else
  59 #include <linux/ext2_fs.h>
  60 #endif
  61 #include <bsdcompat.h>
  62 #include <signal.h>
  63 #include <string.h>
  64 #else   /* __linux__ */
  65 #include <ufs/ufs/dinode.h>
  66 #endif  /* __linux__ */
  67 #include <protocols/dumprestore.h>
  68
  69 #include <compaterr.h>
  70 #include <stdio.h>
  71 #include <stdlib.h>
  72 #include <unistd.h>
  73
  74 #ifdef  __linux__
  75 #include <ext2fs/ext2fs.h>
  76 #include <getopt.h>
  77 #endif
  78
  79 #include "pathnames.h"
  80 #include "restore.h"
  81 #include "extern.h"
  82
  83 int     bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
  84 int     hflag = 1, mflag = 1, Nflag = 0, zflag = 0;
  85 int     uflag = 0;
  86 int     dokerberos = 0;
  87 char    command = '\0';
  88 long    dumpnum = 1;
  89 long    volno = 0;
  90 long    ntrec;
  91 char    *dumpmap;
  92 char    *usedinomap;
  93 dump_ino_t maxino;
  94 time_t  dumptime;
  95 time_t  dumpdate;
  96 FILE    *terminal;
  97 char    *tmpdir;
  98 int     compare_ignore_not_found;
  99 int     compare_errors;
 100 char    filesys[NAMELEN];
 101 static const char *stdin_opt = NULL;
 102
 103 #ifdef  __linux__
 104 char    *__progname;
 105 #endif
 106
 107 static void obsolete __P((int *, char **[]));
 108 static void usage __P((void));
 109 static void use_stdin __P((const char *));
 110
 111 int
 112 main(int argc, char *argv[])
 113 {
 114         int ch;
 115         dump_ino_t ino;
 116         char *inputdev = _PATH_DEFTAPE;
 117         char *symtbl = "./restoresymtable";
 118         char *p, name[MAXPATHLEN];
 119         FILE *filelist = NULL;
 120         char fname[MAXPATHLEN];
 121 #ifdef USE_QFA
 122         tapeposflag = 0;
 123 #endif
 124 #ifdef USE_QFADEBUG
 125         time_t tistart, tiend, titaken;
 126 #endif
 127
 128         /* Temp files should *not* be readable.  We set permissions later. */
 129         (void) umask(077);
 130         filesys[0] = '\0';
 131 #ifdef  __linux__
 132         __progname = argv[0];
 133 #endif
 134
 135         if (argc < 2)
 136                 usage();
 137
 138         if ((inputdev = getenv("TAPE")) == NULL)
 139                 inputdev = _PATH_DEFTAPE;
 140         if ((tmpdir = getenv("TMPDIR")) == NULL)
 141                 tmpdir = _PATH_TMP;
 142         if ((tmpdir = strdup(tmpdir)) == NULL)
 143                 err(1, "malloc tmpdir");
 144         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 145                 ;
 146         obsolete(&argc, &argv);
 147         while ((ch = getopt(argc, argv,
 148                 "b:CcdD:f:hi"
 149 #ifdef KERBEROS
 150                 "k"
 151 #endif
 152                 "mMN"
 153 #ifdef USE_QFA
 154                 "Q:"
 155 #endif
 156                 "Rrs:tT:uvxX:y")) != -1)
 157                 switch(ch) {
 158                 case 'b':
 159                         /* Change default tape blocksize. */
 160                         bflag = 1;
 161                         ntrec = strtol(optarg, &p, 10);
 162                         if (*p)
 163                                 errx(1, "illegal blocksize -- %s", optarg);
 164                         if (ntrec <= 0)
 165                                 errx(1, "block size must be greater than 0");
 166                         break;
 167                 case 'c':
 168                         cvtflag = 1;
 169                         break;
 170                 case 'D':
 171                         strncpy(filesys, optarg, NAMELEN);
 172                         filesys[NAMELEN - 1] = '\0';
 173                         break;
 174                 case 'T':
 175                         tmpdir = optarg;
 176                         break;
 177                 case 'd':
 178                         dflag = 1;
 179                         break;
 180                 case 'f':
 181                         if( !strcmp(optarg,"-") )
 182                                 use_stdin("-f");
 183                         inputdev = optarg;
 184                         break;
 185                 case 'h':
 186                         hflag = 0;
 187                         break;
 188 #ifdef KERBEROS
 189                 case 'k':
 190                         dokerberos = 1;
 191                         break;
 192 #endif
 193                 case 'C':
 194                 case 'i':
 195                 case 'R':
 196                 case 'r':
 197                 case 't':
 198                 case 'x':
 199                         if (command != '\0')
 200                                 errx(1,
 201                                     "%c and %c options are mutually exclusive",
 202                                     ch, command);
 203                         command = ch;
 204                         break;
 205                 case 'm':
 206                         mflag = 0;
 207                         break;
 208                 case 'M':
 209                         Mflag = 1;
 210                         break;
 211                 case 'N':
 212                         Nflag = 1;
 213                         break;
 214 #ifdef USE_QFA
 215                 case 'Q':
 216                         gTapeposfile = optarg;
 217                         tapeposflag = 1;
 218                         break;
 219 #endif
 220                 case 's':
 221                         /* Dumpnum (skip to) for multifile dump tapes. */
 222                         dumpnum = strtol(optarg, &p, 10);
 223                         if (*p)
 224                                 errx(1, "illegal dump number -- %s", optarg);
 225                         if (dumpnum <= 0)
 226                                 errx(1, "dump number must be greater than 0");
 227                         break;
 228                 case 'u':
 229                         uflag = 1;
 230                         break;
 231                 case 'v':
 232                         vflag = 1;
 233                         break;
 234                 case 'X':
 235                         if( !strcmp(optarg,"-") ) {
 236                                 use_stdin("-X");
 237                                 filelist = stdin;
 238                         }
 239                         else
 240                                 if ( !(filelist = fopen(optarg,"r")) )
 241                                         errx(1, "can't open file for reading -- %s", optarg);
 242                         break;
 243                 case 'y':
 244                         yflag = 1;
 245                         break;
 246                 default:
 247                         usage();
 248                 }
 249         argc -= optind;
 250         argv += optind;
 251
 252         if (command == '\0')
 253                 errx(1, "none of C, i, R, r, t or x options specified");
 254
 255 #ifdef USE_QFA
 256         if (!mflag && tapeposflag)
 257                 errx(1, "m and Q options are mutually exclusive");
 258 #endif
 259
 260         if (signal(SIGINT, onintr) == SIG_IGN)
 261                 (void) signal(SIGINT, SIG_IGN);
 262         if (signal(SIGTERM, onintr) == SIG_IGN)
 263                 (void) signal(SIGTERM, SIG_IGN);
 264         setlinebuf(stderr);
 265
 266         atexit(cleanup);
 267
 268         setinput(inputdev);
 269
 270         if (argc == 0 && !filelist) {
 271                 argc = 1;
 272                 *--argv = ".";
 273         }
 274
 275 #ifdef USE_QFA
 276         if (tapeposflag) {
 277                 msg("reading QFA positions from %s\n", gTapeposfile);
 278                 if ((gTapeposfp = fopen(gTapeposfile, "r")) == NULL)
 279                         errx(1, "can't open file for reading -- %s",
 280                                 gTapeposfile);
 281                 /* start reading header info */
 282                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 283                         errx(1, "not requested format of -- %s", gTapeposfile);
 284                 gTps[strlen(gTps) - 1] = 0;     /* delete end of line */
 285                 if (strcmp(gTps, QFA_MAGIC) != 0)
 286                         errx(1, "not requested format of -- %s", gTapeposfile);
 287                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 288                         errx(1, "not requested format of -- %s", gTapeposfile);
 289                 gTps[strlen(gTps) - 1] = 0;
 290                 if (strcmp(gTps, QFA_VERSION) != 0)
 291                         errx(1, "not requested format of -- %s", gTapeposfile);
 292                 /* read dumpdate */
 293                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 294                         errx(1, "not requested format of -- %s", gTapeposfile);
 295                 gTps[strlen(gTps) - 1] = 0;
 296                 /* TODO: check dumpdate from QFA file with current dump file's
 297                  * dump date */
 298                 /* if not equal either output warning and continue without QFA
 299                  * or abort */
 300                 /* read empty line */
 301                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 302                         errx(1, "not requested format of -- %s", gTapeposfile);
 303                 gTps[strlen(gTps) - 1] = 0;
 304                 /* read table header line */
 305                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 306                         errx(1, "not requested format of -- %s", gTapeposfile);
 307                 gTps[strlen(gTps) - 1] = 0;
 308                 /* end reading header info */
 309                 /* tape position table starts here */
 310                 gSeekstart = ftell(gTapeposfp); /* remember for later use */
 311 }
 312 #endif /* USE_QFA */
 313
 314         switch (command) {
 315         /*
 316          * Compare contents of tape.
 317          */
 318         case 'C': {
 319                 struct STAT stbuf;
 320
 321                 Vprintf(stdout, "Begin compare restore\n");
 322                 compare_ignore_not_found = 0;
 323                 compare_errors = 0;
 324                 setup();
 325                 printf("filesys = %s\n", filesys);
 326                 if (STAT(filesys, &stbuf) < 0)
 327                         err(1, "cannot stat directory %s", filesys);
 328                 if (chdir(filesys) < 0)
 329                         err(1, "cannot cd to %s", filesys);
 330                 compare_ignore_not_found = dumptime > 0;
 331                 initsymtable((char *)0);
 332                 extractdirs(0);
 333                 treescan(".", ROOTINO, nodeupdates);
 334                 compareleaves();
 335                 checkrestore();
 336                 if (compare_errors) {
 337                         printf("Some files were modified!\n");
 338                         exit(2);
 339                 }
 340                 break;
 341         }
 342
 343         /*
 344          * Interactive mode.
 345          */
 346         case 'i':
 347                 setup();
 348                 extractdirs(1);
 349                 initsymtable(NULL);
 350                 runcmdshell();
 351                 break;
 352         /*
 353          * Incremental restoration of a file system.
 354          */
 355         case 'r':
 356                 setup();
 357                 if (dumptime > 0) {
 358                         /*
 359                          * This is an incremental dump tape.
 360                          */
 361                         Vprintf(stdout, "Begin incremental restore\n");
 362                         initsymtable(symtbl);
 363                         extractdirs(1);
 364                         removeoldleaves();
 365                         Vprintf(stdout, "Calculate node updates.\n");
 366                         treescan(".", ROOTINO, nodeupdates);
 367                         findunreflinks();
 368                         removeoldnodes();
 369                 } else {
 370                         /*
 371                          * This is a level zero dump tape.
 372                          */
 373                         Vprintf(stdout, "Begin level 0 restore\n");
 374                         initsymtable((char *)0);
 375                         extractdirs(1);
 376                         Vprintf(stdout, "Calculate extraction list.\n");
 377                         treescan(".", ROOTINO, nodeupdates);
 378                 }
 379                 createleaves(symtbl);
 380                 createlinks();
 381                 setdirmodes(FORCE);
 382                 checkrestore();
 383                 if (dflag) {
 384                         Vprintf(stdout, "Verify the directory structure\n");
 385                         treescan(".", ROOTINO, verifyfile);
 386                 }
 387                 dumpsymtable(symtbl, (long)1);
 388                 break;
 389         /*
 390          * Resume an incremental file system restoration.
 391          */
 392         case 'R':
 393                 initsymtable(symtbl);
 394                 skipmaps();
 395                 skipdirs();
 396                 createleaves(symtbl);
 397                 createlinks();
 398                 setdirmodes(FORCE);
 399                 checkrestore();
 400                 dumpsymtable(symtbl, (long)1);
 401                 break;
 402
 403 /* handle file names from either text file (-X) or the command line */
 404 #define NEXTFILE(p) \
 405         p = NULL; \
 406         if (argc) { \
 407                 --argc; \
 408                 p = *argv++; \
 409         } \
 410         else if (filelist) { \
 411                 if ((p = fgets(fname, MAXPATHLEN, filelist))) { \
 412                         if ( *p && *(p + strlen(p) - 1) == '\n' ) /* possible null string */ \
 413                                 *(p + strlen(p) - 1) = '\0'; \
 414                         if ( !*p ) /* skip empty lines */ \
 415                                 continue; \
 416                         } \
 417         }
 418
 419         /*
 420          * List contents of tape.
 421          */
 422         case 't':
 423                 setup();
 424                 extractdirs(0);
 425                 initsymtable((char *)0);
 426                 for (;;) {
 427                         NEXTFILE(p);
 428                         if (!p)
 429                                 break;
 430                         canon(p, name, sizeof(name));
 431                         ino = dirlookup(name);
 432                         if (ino == 0)
 433                                 continue;
 434                         treescan(name, ino, listfile);
 435                 }
 436                 break;
 437         /*
 438          * Batch extraction of tape contents.
 439          */
 440         case 'x':
 441 #ifdef USE_QFADEBUG
 442                 tistart = time(NULL);
 443 #endif
 444                 setup();
 445                 extractdirs(1);
 446                 initsymtable((char *)0);
 447                 for (;;) {
 448                         NEXTFILE(p);
 449                         if (!p)
 450                                 break;
 451                         canon(p, name, sizeof(name));
 452                         ino = dirlookup(name);
 453                         if (ino == 0)
 454                                 continue;
 455                         if (mflag)
 456                                 pathcheck(name);
 457                         treescan(name, ino, addfile);
 458                 }
 459                 createfiles();
 460                 createlinks();
 461                 setdirmodes(0);
 462                 if (dflag)
 463                         checkrestore();
 464 #ifdef USE_QFADEBUG
 465                 tiend = time(NULL);
 466                 titaken = tiend - tistart;
 467                 msg("restore took %d:%02d:%02d\n", titaken / 3600,
 468                         (titaken % 3600) / 60, titaken % 60);
 469 #endif /* USE_QFADEBUG */
 470                 break;
 471         }
 472         exit(0);
 473         /* NOTREACHED */
 474         return 0;       /* gcc shut up */
 475 }
 476
 477 static void
 478 usage(void)
 479 {
 480 #ifdef __linux__
 481         const char *ext2ver, *ext2date;
 482
 483         ext2fs_get_library_version(&ext2ver, &ext2date);
 484         (void)fprintf(stderr, "%s %s (using libext2fs %s of %s)\n",
 485                       __progname, _DUMP_VERSION, ext2ver, ext2date);
 486 #else
 487         (void)fprintf(stderr, "%s %s\n", __progname, _DUMP_VERSION);
 488 #endif
 489
 490 #ifdef KERBEROS
 491 #define kerbflag "k"
 492 #else
 493 #define kerbflag
 494 #endif
 495
 496 #ifdef USE_QFA
 497 #define qfaflag "[-Q file] "
 498 #else
 499 #define qfaflag
 500 #endif
 501
 502         (void)fprintf(stderr,
 503           "usage:\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n",
 504           __progname, " -C [-c" kerbflag "Mvy] [-b blocksize] [-D filesystem] [-f file] [-s fileno]",
 505           __progname, " -i [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] " qfaflag "[-s fileno]",
 506           __progname, " -r [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-T directory]",
 507           __progname, " -R [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-T directory]",
 508           __progname, " -t [-ch" kerbflag "Muvy] [-b blocksize] [-f file] " qfaflag "[-s fileno] [-X filelist] [file ...]",
 509           __progname, " -x [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] " qfaflag "[-s fileno] [-X filelist] [file ...]");
 510         exit(1);
 511 }
 512
 513 /*
 514  * obsolete --
 515  *      Change set of key letters and ordered arguments into something
 516  *      getopt(3) will like.
 517  */
 518 static void
 519 obsolete(int *argcp, char **argvp[])
 520 {
 521         int argc, flags;
 522         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 523
 524         /* Setup. */
 525         argv = *argvp;
 526         argc = *argcp;
 527
 528         /* Return if no arguments or first argument has leading dash. */
 529         ap = argv[1];
 530         if (argc == 1 || *ap == '-')
 531                 return;
 532
 533         /* Allocate space for new arguments. */
 534         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 535             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 536                 err(1, "malloc args");
 537
 538         *nargv++ = *argv;
 539         argv += 2, argc -= 2;
 540
 541         for (flags = 0; *ap; ++ap) {
 542                 switch (*ap) {
 543                 case 'b':
 544                 case 'D':
 545                 case 'f':
 546                 case 'Q':
 547                 case 's':
 548                 case 'T':
 549                 case 'X':
 550                         if (*argv == NULL) {
 551                                 warnx("option requires an argument -- %c", *ap);
 552                                 usage();
 553                         }
 554                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 555                                 err(1, "malloc arg");
 556                         nargv[0][0] = '-';
 557                         nargv[0][1] = *ap;
 558                         (void)strcpy(&nargv[0][2], *argv);
 559                         ++argv;
 560                         ++nargv;
 561                         break;
 562                 default:
 563                         if (!flags) {
 564                                 *p++ = '-';
 565                                 flags = 1;
 566                         }
 567                         *p++ = *ap;
 568                         break;
 569                 }
 570         }
 571
 572         /* Terminate flags. */
 573         if (flags) {
 574                 *p = '\0';
 575                 *nargv++ = flagsp;
 576         }
 577
 578         /* Copy remaining arguments. */
 579         while ((*nargv++ = *argv++));
 580
 581         /* Update argument count. */
 582         *argcp = nargv - *argvp - 1;
 583 }
 584
 585 /*
 586  * use_stdin --
 587  *      reserve stdin for opt (avoid conflicts)
 588  */
 589 void
 590 use_stdin(const char *opt)
 591 {
 592         if (stdin_opt)
 593                 errx(1, "can't handle standard input for both %s and %s",
 594                         stdin_opt, opt);
 595         stdin_opt = opt;
 596 }