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 1.21 2001/04/24 10:59:13 stelian Exp $";
  45 #endif /* not lint */
  46
  47 #include <config.h>
  48 #include <sys/param.h>
  49 #include <sys/stat.h>
  50 #include <errno.h>
  51
  52 #ifdef  __linux__
  53 #include <sys/time.h>
  54 #include <time.h>
  55 #ifdef HAVE_EXT2FS_EXT2_FS_H
  56 #include <ext2fs/ext2_fs.h>
  57 #else
  58 #include <linux/ext2_fs.h>
  59 #endif
  60 #include <bsdcompat.h>
  61 #include <signal.h>
  62 #include <string.h>
  63 #else   /* __linux__ */
  64 #include <ufs/ufs/dinode.h>
  65 #endif  /* __linux__ */
  66 #include <protocols/dumprestore.h>
  67
  68 #include <compaterr.h>
  69 #include <stdio.h>
  70 #include <stdlib.h>
  71 #include <unistd.h>
  72
  73 #ifdef  __linux__
  74 #include <ext2fs/ext2fs.h>
  75 #include <getopt.h>
  76 #endif
  77
  78 #include "pathnames.h"
  79 #include "restore.h"
  80 #include "extern.h"
  81
  82 int     bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
  83 int     hflag = 1, mflag = 1, Nflag = 0, zflag = 0;
  84 int     uflag = 0;
  85 int     dokerberos = 0;
  86 char    command = '\0';
  87 long    dumpnum = 1;
  88 long    volno = 0;
  89 long    ntrec;
  90 char    *dumpmap;
  91 char    *usedinomap;
  92 dump_ino_t maxino;
  93 time_t  dumptime;
  94 time_t  dumpdate;
  95 FILE    *terminal;
  96 char    *tmpdir;
  97 int     compare_ignore_not_found;
  98 int     compare_errors;
  99 char    filesys[NAMELEN];
 100 static const char *stdin_opt = NULL;
 101
 102 #ifdef  __linux__
 103 char    *__progname;
 104 #endif
 105
 106 static void obsolete __P((int *, char **[]));
 107 static void usage __P((void));
 108 static void use_stdin __P((const char *));
 109
 110 int
 111 main(int argc, char *argv[])
 112 {
 113         int ch;
 114         dump_ino_t ino;
 115         char *inputdev = _PATH_DEFTAPE;
 116         char *symtbl = "./restoresymtable";
 117         char *p, name[MAXPATHLEN];
 118         FILE *filelist = NULL;
 119         char fname[MAXPATHLEN];
 120 #ifdef USE_QFA
 121         time_t tistart, tiend, titaken;
 122         tapeposflag = 0;
 123 #endif
 124
 125         /* Temp files should *not* be readable.  We set permissions later. */
 126         (void) umask(077);
 127         filesys[0] = '\0';
 128 #ifdef  __linux__
 129         __progname = argv[0];
 130 #endif
 131
 132         if (argc < 2)
 133                 usage();
 134
 135         if ((inputdev = getenv("TAPE")) == NULL)
 136                 inputdev = _PATH_DEFTAPE;
 137         if ((tmpdir = getenv("TMPDIR")) == NULL)
 138                 tmpdir = _PATH_TMP;
 139         if ((tmpdir = strdup(tmpdir)) == NULL)
 140                 err(1, "malloc tmpdir");
 141         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 142                 ;
 143         obsolete(&argc, &argv);
 144         while ((ch = getopt(argc, argv,
 145                 "b:CcdD:f:hi"
 146 #ifdef KERBEROS
 147                 "k"
 148 #endif
 149                 "mMN"
 150 #ifdef USE_QFA
 151                 "Q:"
 152 #endif
 153                 "Rrs:tT:uvxX:y")) != -1)
 154                 switch(ch) {
 155                 case 'b':
 156                         /* Change default tape blocksize. */
 157                         bflag = 1;
 158                         ntrec = strtol(optarg, &p, 10);
 159                         if (*p)
 160                                 errx(1, "illegal blocksize -- %s", optarg);
 161                         if (ntrec <= 0)
 162                                 errx(1, "block size must be greater than 0");
 163                         break;
 164                 case 'c':
 165                         cvtflag = 1;
 166                         break;
 167                 case 'D':
 168                         strncpy(filesys, optarg, NAMELEN);
 169                         filesys[NAMELEN - 1] = '\0';
 170                         break;
 171                 case 'T':
 172                         tmpdir = optarg;
 173                         break;
 174                 case 'd':
 175                         dflag = 1;
 176                         break;
 177                 case 'f':
 178                         if( !strcmp(optarg,"-") )
 179                                 use_stdin("-f");
 180                         inputdev = optarg;
 181                         break;
 182                 case 'h':
 183                         hflag = 0;
 184                         break;
 185 #ifdef KERBEROS
 186                 case 'k':
 187                         dokerberos = 1;
 188                         break;
 189 #endif
 190                 case 'C':
 191                 case 'i':
 192                 case 'R':
 193                 case 'r':
 194                 case 't':
 195                 case 'x':
 196                         if (command != '\0')
 197                                 errx(1,
 198                                     "%c and %c options are mutually exclusive",
 199                                     ch, command);
 200                         command = ch;
 201                         break;
 202                 case 'm':
 203                         mflag = 0;
 204                         break;
 205                 case 'M':
 206                         Mflag = 1;
 207                         break;
 208                 case 'N':
 209                         Nflag = 1;
 210                         break;
 211 #ifdef USE_QFA
 212                 case 'Q':
 213                         gTapeposfile = optarg;
 214                         tapeposflag = 1;
 215                         break;
 216 #endif
 217                 case 's':
 218                         /* Dumpnum (skip to) for multifile dump tapes. */
 219                         dumpnum = strtol(optarg, &p, 10);
 220                         if (*p)
 221                                 errx(1, "illegal dump number -- %s", optarg);
 222                         if (dumpnum <= 0)
 223                                 errx(1, "dump number must be greater than 0");
 224                         break;
 225                 case 'u':
 226                         uflag = 1;
 227                         break;
 228                 case 'v':
 229                         vflag = 1;
 230                         break;
 231                 case 'X':
 232                         if( !strcmp(optarg,"-") ) {
 233                                 use_stdin("-X");
 234                                 filelist = stdin;
 235                         }
 236                         else
 237                                 if ( !(filelist = fopen(optarg,"r")) )
 238                                         errx(1, "can't open file for reading -- %s", optarg);
 239                         break;
 240                 case 'y':
 241                         yflag = 1;
 242                         break;
 243                 default:
 244                         usage();
 245                 }
 246         argc -= optind;
 247         argv += optind;
 248
 249         if (command == '\0')
 250                 errx(1, "none of C, i, R, r, t or x options specified");
 251
 252         if (signal(SIGINT, onintr) == SIG_IGN)
 253                 (void) signal(SIGINT, SIG_IGN);
 254         if (signal(SIGTERM, onintr) == SIG_IGN)
 255                 (void) signal(SIGTERM, SIG_IGN);
 256         setlinebuf(stderr);
 257
 258         atexit(cleanup);
 259
 260         setinput(inputdev);
 261
 262         if (argc == 0 && !filelist) {
 263                 argc = 1;
 264                 *--argv = ".";
 265         }
 266
 267 #ifdef USE_QFA
 268         if (tapeposflag) {
 269                 msg("reading QFA positions from %s\n", gTapeposfile);
 270                 if ((gTapeposfp = fopen(gTapeposfile, "r")) == NULL)
 271                         errx(1, "can't open file for reading -- %s",
 272                                 gTapeposfile);
 273                 /* start reading header info */
 274                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 275                         errx(1, "not requested format of -- %s", gTapeposfile);
 276                 gTps[strlen(gTps) - 1] = 0;     /* delete end of line */
 277                 if (strcmp(gTps, QFA_MAGIC) != 0)
 278                         errx(1, "not requested format of -- %s", gTapeposfile);
 279                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 280                         errx(1, "not requested format of -- %s", gTapeposfile);
 281                 gTps[strlen(gTps) - 1] = 0;
 282                 if (strcmp(gTps, QFA_VERSION) != 0)
 283                         errx(1, "not requested format of -- %s", gTapeposfile);
 284                 /* read dumpdate */
 285                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 286                         errx(1, "not requested format of -- %s", gTapeposfile);
 287                 gTps[strlen(gTps) - 1] = 0;
 288                 /* TODO: check dumpdate from QFA file with current dump file's
 289                  * dump date */
 290                 /* if not equal either output warning and continue without QFA
 291                  * or abort */
 292                 /* read empty line */
 293                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 294                         errx(1, "not requested format of -- %s", gTapeposfile);
 295                 gTps[strlen(gTps) - 1] = 0;
 296                 /* read table header line */
 297                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 298                         errx(1, "not requested format of -- %s", gTapeposfile);
 299                 gTps[strlen(gTps) - 1] = 0;
 300                 /* end reading header info */
 301                 /* tape position table starts here */
 302                 gSeekstart = ftell(gTapeposfp); /* remember for later use */
 303 }
 304 #endif /* USE_QFA */
 305
 306         switch (command) {
 307         /*
 308          * Compare contents of tape.
 309          */
 310         case 'C': {
 311                 struct stat stbuf;
 312
 313                 Vprintf(stdout, "Begin compare restore\n");
 314                 compare_ignore_not_found = 0;
 315                 compare_errors = 0;
 316                 setup();
 317                 printf("filesys = %s\n", filesys);
 318                 if (stat(filesys, &stbuf) < 0)
 319                         err(1, "cannot stat directory %s", filesys);
 320                 if (chdir(filesys) < 0)
 321                         err(1, "cannot cd to %s", filesys);
 322                 compare_ignore_not_found = dumptime > 0;
 323                 initsymtable((char *)0);
 324                 extractdirs(0);
 325                 treescan(".", ROOTINO, nodeupdates);
 326                 compareleaves();
 327                 checkrestore();
 328                 if (compare_errors) {
 329                         printf("Some files were modified!\n");
 330                         exit(2);
 331                 }
 332                 break;
 333         }
 334
 335         /*
 336          * Interactive mode.
 337          */
 338         case 'i':
 339                 setup();
 340                 extractdirs(1);
 341                 initsymtable(NULL);
 342                 runcmdshell();
 343                 break;
 344         /*
 345          * Incremental restoration of a file system.
 346          */
 347         case 'r':
 348                 setup();
 349                 if (dumptime > 0) {
 350                         /*
 351                          * This is an incremental dump tape.
 352                          */
 353                         Vprintf(stdout, "Begin incremental restore\n");
 354                         initsymtable(symtbl);
 355                         extractdirs(1);
 356                         removeoldleaves();
 357                         Vprintf(stdout, "Calculate node updates.\n");
 358                         treescan(".", ROOTINO, nodeupdates);
 359                         findunreflinks();
 360                         removeoldnodes();
 361                 } else {
 362                         /*
 363                          * This is a level zero dump tape.
 364                          */
 365                         Vprintf(stdout, "Begin level 0 restore\n");
 366                         initsymtable((char *)0);
 367                         extractdirs(1);
 368                         Vprintf(stdout, "Calculate extraction list.\n");
 369                         treescan(".", ROOTINO, nodeupdates);
 370                 }
 371                 createleaves(symtbl);
 372                 createlinks();
 373                 setdirmodes(FORCE);
 374                 checkrestore();
 375                 if (dflag) {
 376                         Vprintf(stdout, "Verify the directory structure\n");
 377                         treescan(".", ROOTINO, verifyfile);
 378                 }
 379                 dumpsymtable(symtbl, (long)1);
 380                 break;
 381         /*
 382          * Resume an incremental file system restoration.
 383          */
 384         case 'R':
 385                 initsymtable(symtbl);
 386                 skipmaps();
 387                 skipdirs();
 388                 createleaves(symtbl);
 389                 createlinks();
 390                 setdirmodes(FORCE);
 391                 checkrestore();
 392                 dumpsymtable(symtbl, (long)1);
 393                 break;
 394
 395 /* handle file names from either text file (-X) or the command line */
 396 #define NEXTFILE(p) \
 397         p = NULL; \
 398         if (argc) { \
 399                 --argc; \
 400                 p = *argv++; \
 401         } \
 402         else if (filelist) { \
 403                 if ((p = fgets(fname, MAXPATHLEN, filelist))) { \
 404                         if ( *p && *(p + strlen(p) - 1) == '\n' ) /* possible null string */ \
 405                                 *(p + strlen(p) - 1) = '\0'; \
 406                         if ( !*p ) /* skip empty lines */ \
 407                                 continue; \
 408                         } \
 409         }
 410
 411         /*
 412          * List contents of tape.
 413          */
 414         case 't':
 415                 setup();
 416                 extractdirs(0);
 417                 initsymtable((char *)0);
 418                 for (;;) {
 419                         NEXTFILE(p);
 420                         if (!p)
 421                                 break;
 422                         canon(p, name, sizeof(name));
 423                         ino = dirlookup(name);
 424                         if (ino == 0)
 425                                 continue;
 426                         treescan(name, ino, listfile);
 427                 }
 428                 break;
 429         /*
 430          * Batch extraction of tape contents.
 431          */
 432         case 'x':
 433 #ifdef USE_QFA
 434                 tistart = time(NULL);
 435 #endif
 436                 setup();
 437                 extractdirs(1);
 438                 initsymtable((char *)0);
 439                 for (;;) {
 440                         NEXTFILE(p);
 441                         if (!p)
 442                                 break;
 443                         canon(p, name, sizeof(name));
 444                         ino = dirlookup(name);
 445                         if (ino == 0)
 446                                 continue;
 447                         if (mflag)
 448                                 pathcheck(name);
 449                         treescan(name, ino, addfile);
 450                 }
 451                 createfiles();
 452                 createlinks();
 453                 setdirmodes(0);
 454                 if (dflag)
 455                         checkrestore();
 456 #ifdef USE_QFA
 457                 tiend = time(NULL);
 458                 titaken = tiend - tistart;
 459 #ifdef USE_QFA
 460                 msg("restore took %d:%02d:%02d\n", titaken / 3600,
 461                         (titaken % 3600) / 60, titaken % 60);
 462 #endif
 463 #endif
 464                 break;
 465         }
 466         exit(0);
 467         /* NOTREACHED */
 468         return 0;       /* gcc shut up */
 469 }
 470
 471 static void
 472 usage(void)
 473 {
 474 #ifdef __linux__
 475         const char *ext2ver, *ext2date;
 476
 477         ext2fs_get_library_version(&ext2ver, &ext2date);
 478         (void)fprintf(stderr, "%s %s (using libext2fs %s of %s)\n",
 479                       __progname, _DUMP_VERSION, ext2ver, ext2date);
 480 #else
 481         (void)fprintf(stderr, "%s %s\n", __progname, _DUMP_VERSION);
 482 #endif
 483
 484 #ifdef KERBEROS
 485 #define kerbflag "k"
 486 #else
 487 #define kerbflag
 488 #endif
 489
 490 #ifdef USE_QFA
 491 #define qfaflag "[-Q file] "
 492 #else
 493 #define qfaflag
 494 #endif
 495
 496         (void)fprintf(stderr,
 497           "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",
 498           __progname, " -C [-c" kerbflag "Mvy] [-b blocksize] [-D filesystem] [-f file] [-s fileno]",
 499           __progname, " -i [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno]",
 500           __progname, " -r [-c" kerbflag "Muvy] [-b blocksize] [-f file] " qfaflag "[-s fileno] [-T directory]",
 501           __progname, " -R [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-T directory]",
 502           __progname, " -t [-ch" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]",
 503           __progname, " -x [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]");
 504         exit(1);
 505 }
 506
 507 /*
 508  * obsolete --
 509  *      Change set of key letters and ordered arguments into something
 510  *      getopt(3) will like.
 511  */
 512 static void
 513 obsolete(int *argcp, char **argvp[])
 514 {
 515         int argc, flags;
 516         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 517
 518         /* Setup. */
 519         argv = *argvp;
 520         argc = *argcp;
 521
 522         /* Return if no arguments or first argument has leading dash. */
 523         ap = argv[1];
 524         if (argc == 1 || *ap == '-')
 525                 return;
 526
 527         /* Allocate space for new arguments. */
 528         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 529             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 530                 err(1, "malloc args");
 531
 532         *nargv++ = *argv;
 533         argv += 2, argc -= 2;
 534
 535         for (flags = 0; *ap; ++ap) {
 536                 switch (*ap) {
 537                 case 'b':
 538                 case 'D':
 539                 case 'f':
 540                 case 'Q':
 541                 case 's':
 542                 case 'T':
 543                 case 'X':
 544                         if (*argv == NULL) {
 545                                 warnx("option requires an argument -- %c", *ap);
 546                                 usage();
 547                         }
 548                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 549                                 err(1, "malloc arg");
 550                         nargv[0][0] = '-';
 551                         nargv[0][1] = *ap;
 552                         (void)strcpy(&nargv[0][2], *argv);
 553                         ++argv;
 554                         ++nargv;
 555                         break;
 556                 default:
 557                         if (!flags) {
 558                                 *p++ = '-';
 559                                 flags = 1;
 560                         }
 561                         *p++ = *ap;
 562                         break;
 563                 }
 564         }
 565
 566         /* Terminate flags. */
 567         if (flags) {
 568                 *p = '\0';
 569                 *nargv++ = flagsp;
 570         }
 571
 572         /* Copy remaining arguments. */
 573         while ((*nargv++ = *argv++));
 574
 575         /* Update argument count. */
 576         *argcp = nargv - *argvp - 1;
 577 }
 578
 579 /*
 580  * use_stdin --
 581  *      reserve stdin for opt (avoid conflicts)
 582  */
 583 void
 584 use_stdin(const char *opt)
 585 {
 586         if (stdin_opt)
 587                 errx(1, "can't handle standard input for both %s and %s",
 588                         stdin_opt, opt);
 589         stdin_opt = opt;
 590 }