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 1.20 2001/04/10 12:46:53 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 #ifdef HAVE_EXT2FS_EXT2_FS_H
  54 #include <ext2fs/ext2_fs.h>
  55 #else
  56 #include <linux/ext2_fs.h>
  57 #endif
  58 #include <bsdcompat.h>
  59 #include <signal.h>
  60 #include <string.h>
  61 #else   /* __linux__ */
  62 #include <ufs/ufs/dinode.h>
  63 #endif  /* __linux__ */
  64 #include <protocols/dumprestore.h>
  65
  66 #include <compaterr.h>
  67 #include <stdio.h>
  68 #include <stdlib.h>
  69 #include <unistd.h>
  70
  71 #ifdef  __linux__
  72 #include <ext2fs/ext2fs.h>
  73 #include <getopt.h>
  74 #endif
  75
  76 #include "pathnames.h"
  77 #include "restore.h"
  78 #include "extern.h"
  79
  80 int     bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
  81 int     hflag = 1, mflag = 1, Nflag = 0, zflag = 0;
  82 int     uflag = 0;
  83 int     dokerberos = 0;
  84 char    command = '\0';
  85 long    dumpnum = 1;
  86 long    volno = 0;
  87 long    ntrec;
  88 char    *dumpmap;
  89 char    *usedinomap;
  90 dump_ino_t maxino;
  91 time_t  dumptime;
  92 time_t  dumpdate;
  93 FILE    *terminal;
  94 char    *tmpdir;
  95 int     compare_ignore_not_found;
  96 int     compare_errors;
  97 char    filesys[NAMELEN];
  98 static const char *stdin_opt = NULL;
  99
 100 #ifdef  __linux__
 101 char    *__progname;
 102 #endif
 103
 104 static void obsolete __P((int *, char **[]));
 105 static void usage __P((void));
 106 static void use_stdin __P((const char *));
 107
 108 int
 109 main(int argc, char *argv[])
 110 {
 111         int ch;
 112         dump_ino_t ino;
 113         char *inputdev = _PATH_DEFTAPE;
 114         char *symtbl = "./restoresymtable";
 115         char *p, name[MAXPATHLEN];
 116         FILE *filelist = NULL;
 117         char fname[MAXPATHLEN];
 118 #ifdef USE_QFA
 119         time_t tistart, tiend, titaken;
 120         tapeposflag = 0;
 121 #endif
 122
 123         /* Temp files should *not* be readable.  We set permissions later. */
 124         (void) umask(077);
 125         filesys[0] = '\0';
 126 #ifdef  __linux__
 127         __progname = argv[0];
 128 #endif
 129
 130         if (argc < 2)
 131                 usage();
 132
 133         if ((inputdev = getenv("TAPE")) == NULL)
 134                 inputdev = _PATH_DEFTAPE;
 135         if ((tmpdir = getenv("TMPDIR")) == NULL)
 136                 tmpdir = _PATH_TMP;
 137         if ((tmpdir = strdup(tmpdir)) == NULL)
 138                 err(1, "malloc tmpdir");
 139         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 140                 ;
 141         obsolete(&argc, &argv);
 142         while ((ch = getopt(argc, argv,
 143                 "b:CcdD:f:hi"
 144 #ifdef KERBEROS
 145                 "k"
 146 #endif
 147                 "mMN"
 148 #ifdef USE_QFA
 149                 "Q:"
 150 #endif
 151                 "Rrs:tT:uvxX:y")) != -1)
 152                 switch(ch) {
 153                 case 'b':
 154                         /* Change default tape blocksize. */
 155                         bflag = 1;
 156                         ntrec = strtol(optarg, &p, 10);
 157                         if (*p)
 158                                 errx(1, "illegal blocksize -- %s", optarg);
 159                         if (ntrec <= 0)
 160                                 errx(1, "block size must be greater than 0");
 161                         break;
 162                 case 'c':
 163                         cvtflag = 1;
 164                         break;
 165                 case 'D':
 166                         strncpy(filesys, optarg, NAMELEN);
 167                         filesys[NAMELEN - 1] = '\0';
 168                         break;
 169                 case 'T':
 170                         tmpdir = optarg;
 171                         break;
 172                 case 'd':
 173                         dflag = 1;
 174                         break;
 175                 case 'f':
 176                         if( !strcmp(optarg,"-") )
 177                                 use_stdin("-f");
 178                         inputdev = optarg;
 179                         break;
 180                 case 'h':
 181                         hflag = 0;
 182                         break;
 183 #ifdef KERBEROS
 184                 case 'k':
 185                         dokerberos = 1;
 186                         break;
 187 #endif
 188                 case 'C':
 189                 case 'i':
 190                 case 'R':
 191                 case 'r':
 192                 case 't':
 193                 case 'x':
 194                         if (command != '\0')
 195                                 errx(1,
 196                                     "%c and %c options are mutually exclusive",
 197                                     ch, command);
 198                         command = ch;
 199                         break;
 200                 case 'm':
 201                         mflag = 0;
 202                         break;
 203                 case 'M':
 204                         Mflag = 1;
 205                         break;
 206                 case 'N':
 207                         Nflag = 1;
 208                         break;
 209 #ifdef USE_QFA
 210                 case 'Q':
 211                         gTapeposfile = optarg;
 212                         tapeposflag = 1;
 213                         break;
 214 #endif
 215                 case 's':
 216                         /* Dumpnum (skip to) for multifile dump tapes. */
 217                         dumpnum = strtol(optarg, &p, 10);
 218                         if (*p)
 219                                 errx(1, "illegal dump number -- %s", optarg);
 220                         if (dumpnum <= 0)
 221                                 errx(1, "dump number must be greater than 0");
 222                         break;
 223                 case 'u':
 224                         uflag = 1;
 225                         break;
 226                 case 'v':
 227                         vflag = 1;
 228                         break;
 229                 case 'X':
 230                         if( !strcmp(optarg,"-") ) {
 231                                 use_stdin("-X");
 232                                 filelist = stdin;
 233                         }
 234                         else
 235                                 if ( !(filelist = fopen(optarg,"r")) )
 236                                         errx(1, "can't open file for reading -- %s", optarg);
 237                         break;
 238                 case 'y':
 239                         yflag = 1;
 240                         break;
 241                 default:
 242                         usage();
 243                 }
 244         argc -= optind;
 245         argv += optind;
 246
 247         if (command == '\0')
 248                 errx(1, "none of C, i, R, r, t or x options specified");
 249
 250         if (signal(SIGINT, onintr) == SIG_IGN)
 251                 (void) signal(SIGINT, SIG_IGN);
 252         if (signal(SIGTERM, onintr) == SIG_IGN)
 253                 (void) signal(SIGTERM, SIG_IGN);
 254         setlinebuf(stderr);
 255
 256         atexit(cleanup);
 257
 258         setinput(inputdev);
 259
 260         if (argc == 0 && !filelist) {
 261                 argc = 1;
 262                 *--argv = ".";
 263         }
 264
 265 #ifdef USE_QFA
 266         if (tapeposflag) {
 267                 msg("reading QFA positions from %s\n", gTapeposfile);
 268                 if ((gTapeposfp = fopen(gTapeposfile, "r")) == NULL)
 269                         errx(1, "can't open file for reading -- %s",
 270                                 gTapeposfile);
 271                 /* start reading header info */
 272                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 273                         errx(1, "not requested format of -- %s", gTapeposfile);
 274                 gTps[strlen(gTps) - 1] = 0;     /* delete end of line */
 275                 if (strcmp(gTps, QFA_MAGIC) != 0)
 276                         errx(1, "not requested format of -- %s", gTapeposfile);
 277                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 278                         errx(1, "not requested format of -- %s", gTapeposfile);
 279                 gTps[strlen(gTps) - 1] = 0;
 280                 if (strcmp(gTps, QFA_VERSION) != 0)
 281                         errx(1, "not requested format of -- %s", gTapeposfile);
 282                 /* read dumpdate */
 283                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 284                         errx(1, "not requested format of -- %s", gTapeposfile);
 285                 gTps[strlen(gTps) - 1] = 0;
 286                 /* TODO: check dumpdate from QFA file with current dump file's
 287                  * dump date */
 288                 /* if not equal either output warning and continue without QFA
 289                  * or abort */
 290                 /* read empty line */
 291                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 292                         errx(1, "not requested format of -- %s", gTapeposfile);
 293                 gTps[strlen(gTps) - 1] = 0;
 294                 /* read table header line */
 295                 if (fgets(gTps, sizeof(gTps), gTapeposfp) == NULL)
 296                         errx(1, "not requested format of -- %s", gTapeposfile);
 297                 gTps[strlen(gTps) - 1] = 0;
 298                 /* end reading header info */
 299                 /* tape position table starts here */
 300                 gSeekstart = ftell(gTapeposfp); /* remember for later use */
 301 }
 302 #endif /* USE_QFA */
 303
 304         switch (command) {
 305         /*
 306          * Compare contents of tape.
 307          */
 308         case 'C': {
 309                 struct stat stbuf;
 310
 311                 Vprintf(stdout, "Begin compare restore\n");
 312                 compare_ignore_not_found = 0;
 313                 compare_errors = 0;
 314                 setup();
 315                 printf("filesys = %s\n", filesys);
 316                 if (stat(filesys, &stbuf) < 0)
 317                         err(1, "cannot stat directory %s", filesys);
 318                 if (chdir(filesys) < 0)
 319                         err(1, "cannot cd to %s", filesys);
 320                 compare_ignore_not_found = dumptime > 0;
 321                 initsymtable((char *)0);
 322                 extractdirs(0);
 323                 treescan(".", ROOTINO, nodeupdates);
 324                 compareleaves();
 325                 checkrestore();
 326                 if (compare_errors) {
 327                         printf("Some files were modified!\n");
 328                         exit(2);
 329                 }
 330                 break;
 331         }
 332
 333         /*
 334          * Interactive mode.
 335          */
 336         case 'i':
 337                 setup();
 338                 extractdirs(1);
 339                 initsymtable(NULL);
 340                 runcmdshell();
 341                 break;
 342         /*
 343          * Incremental restoration of a file system.
 344          */
 345         case 'r':
 346                 setup();
 347                 if (dumptime > 0) {
 348                         /*
 349                          * This is an incremental dump tape.
 350                          */
 351                         Vprintf(stdout, "Begin incremental restore\n");
 352                         initsymtable(symtbl);
 353                         extractdirs(1);
 354                         removeoldleaves();
 355                         Vprintf(stdout, "Calculate node updates.\n");
 356                         treescan(".", ROOTINO, nodeupdates);
 357                         findunreflinks();
 358                         removeoldnodes();
 359                 } else {
 360                         /*
 361                          * This is a level zero dump tape.
 362                          */
 363                         Vprintf(stdout, "Begin level 0 restore\n");
 364                         initsymtable((char *)0);
 365                         extractdirs(1);
 366                         Vprintf(stdout, "Calculate extraction list.\n");
 367                         treescan(".", ROOTINO, nodeupdates);
 368                 }
 369                 createleaves(symtbl);
 370                 createlinks();
 371                 setdirmodes(FORCE);
 372                 checkrestore();
 373                 if (dflag) {
 374                         Vprintf(stdout, "Verify the directory structure\n");
 375                         treescan(".", ROOTINO, verifyfile);
 376                 }
 377                 dumpsymtable(symtbl, (long)1);
 378                 break;
 379         /*
 380          * Resume an incremental file system restoration.
 381          */
 382         case 'R':
 383                 initsymtable(symtbl);
 384                 skipmaps();
 385                 skipdirs();
 386                 createleaves(symtbl);
 387                 createlinks();
 388                 setdirmodes(FORCE);
 389                 checkrestore();
 390                 dumpsymtable(symtbl, (long)1);
 391                 break;
 392
 393 /* handle file names from either text file (-X) or the command line */
 394 #define NEXTFILE(p) \
 395         p = NULL; \
 396         if (argc) { \
 397                 --argc; \
 398                 p = *argv++; \
 399         } \
 400         else if (filelist) { \
 401                 if ((p = fgets(fname, MAXPATHLEN, filelist))) { \
 402                         if ( *p && *(p + strlen(p) - 1) == '\n' ) /* possible null string */ \
 403                                 *(p + strlen(p) - 1) = '\0'; \
 404                         if ( !*p ) /* skip empty lines */ \
 405                                 continue; \
 406                         } \
 407         }
 408
 409         /*
 410          * List contents of tape.
 411          */
 412         case 't':
 413                 setup();
 414                 extractdirs(0);
 415                 initsymtable((char *)0);
 416                 for (;;) {
 417                         NEXTFILE(p);
 418                         if (!p)
 419                                 break;
 420                         canon(p, name, sizeof(name));
 421                         ino = dirlookup(name);
 422                         if (ino == 0)
 423                                 continue;
 424                         treescan(name, ino, listfile);
 425                 }
 426                 break;
 427         /*
 428          * Batch extraction of tape contents.
 429          */
 430         case 'x':
 431 #ifdef USE_QFA
 432                 tistart = time(NULL);
 433 #endif
 434                 setup();
 435                 extractdirs(1);
 436                 initsymtable((char *)0);
 437                 for (;;) {
 438                         NEXTFILE(p);
 439                         if (!p)
 440                                 break;
 441                         canon(p, name, sizeof(name));
 442                         ino = dirlookup(name);
 443                         if (ino == 0)
 444                                 continue;
 445                         if (mflag)
 446                                 pathcheck(name);
 447                         treescan(name, ino, addfile);
 448                 }
 449                 createfiles();
 450                 createlinks();
 451                 setdirmodes(0);
 452                 if (dflag)
 453                         checkrestore();
 454 #ifdef USE_QFA
 455                 tiend = time(NULL);
 456                 titaken = tiend - tistart;
 457 #ifdef USE_QFA
 458                 msg("restore took %d:%02d:%02d\n", titaken / 3600,
 459                         (titaken % 3600) / 60, titaken % 60);
 460 #endif
 461 #endif
 462                 break;
 463         }
 464         exit(0);
 465         /* NOTREACHED */
 466         return 0;       /* gcc shut up */
 467 }
 468
 469 static void
 470 usage(void)
 471 {
 472 #ifdef __linux__
 473         const char *ext2ver, *ext2date;
 474
 475         ext2fs_get_library_version(&ext2ver, &ext2date);
 476         (void)fprintf(stderr, "%s %s (using libext2fs %s of %s)\n",
 477                       __progname, _DUMP_VERSION, ext2ver, ext2date);
 478 #else
 479         (void)fprintf(stderr, "%s %s\n", __progname, _DUMP_VERSION);
 480 #endif
 481
 482 #ifdef KERBEROS
 483 #define kerbflag "k"
 484 #else
 485 #define kerbflag
 486 #endif
 487         (void)fprintf(stderr,
 488           "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",
 489           __progname, " -C [-c" kerbflag "Mvy] [-b blocksize] [-D filesystem] [-f file] [-s fileno]",
 490           __progname, " -i [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno]",
 491           __progname, " -r [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-T directory]",
 492           __progname, " -R [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-T directory]",
 493           __progname, " -t [-ch" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]",
 494           __progname, " -x [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]");
 495         exit(1);
 496 }
 497
 498 /*
 499  * obsolete --
 500  *      Change set of key letters and ordered arguments into something
 501  *      getopt(3) will like.
 502  */
 503 static void
 504 obsolete(int *argcp, char **argvp[])
 505 {
 506         int argc, flags;
 507         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 508
 509         /* Setup. */
 510         argv = *argvp;
 511         argc = *argcp;
 512
 513         /* Return if no arguments or first argument has leading dash. */
 514         ap = argv[1];
 515         if (argc == 1 || *ap == '-')
 516                 return;
 517
 518         /* Allocate space for new arguments. */
 519         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 520             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 521                 err(1, "malloc args");
 522
 523         *nargv++ = *argv;
 524         argv += 2, argc -= 2;
 525
 526         for (flags = 0; *ap; ++ap) {
 527                 switch (*ap) {
 528                 case 'b':
 529                 case 'D':
 530                 case 'f':
 531                 case 'Q':
 532                 case 's':
 533                 case 'T':
 534                 case 'X':
 535                         if (*argv == NULL) {
 536                                 warnx("option requires an argument -- %c", *ap);
 537                                 usage();
 538                         }
 539                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 540                                 err(1, "malloc arg");
 541                         nargv[0][0] = '-';
 542                         nargv[0][1] = *ap;
 543                         (void)strcpy(&nargv[0][2], *argv);
 544                         ++argv;
 545                         ++nargv;
 546                         break;
 547                 default:
 548                         if (!flags) {
 549                                 *p++ = '-';
 550                                 flags = 1;
 551                         }
 552                         *p++ = *ap;
 553                         break;
 554                 }
 555         }
 556
 557         /* Terminate flags. */
 558         if (flags) {
 559                 *p = '\0';
 560                 *nargv++ = flagsp;
 561         }
 562
 563         /* Copy remaining arguments. */
 564         while ((*nargv++ = *argv++));
 565
 566         /* Update argument count. */
 567         *argcp = nargv - *argvp - 1;
 568 }
 569
 570 /*
 571  * use_stdin --
 572  *      reserve stdin for opt (avoid conflicts)
 573  */
 574 void
 575 use_stdin(const char *opt)
 576 {
 577         if (stdin_opt)
 578                 errx(1, "can't handle standard input for both %s and %s",
 579                         stdin_opt, opt);
 580         stdin_opt = opt;
 581 }