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 1.17 2001/03/20 09:14:58 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 <linux/ext2_fs.h>
  54 #include <bsdcompat.h>
  55 #include <signal.h>
  56 #include <string.h>
  57 #else   /* __linux__ */
  58 #include <ufs/ufs/dinode.h>
  59 #endif  /* __linux__ */
  60 #include <protocols/dumprestore.h>
  61
  62 #include <compaterr.h>
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <unistd.h>
  66
  67 #ifdef  __linux__
  68 #include <ext2fs/ext2fs.h>
  69 #include <getopt.h>
  70 #endif
  71
  72 #include "pathnames.h"
  73 #include "restore.h"
  74 #include "extern.h"
  75
  76 int     bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
  77 int     hflag = 1, mflag = 1, Nflag = 0, zflag = 0;
  78 int     uflag = 0;
  79 int     dokerberos = 0;
  80 char    command = '\0';
  81 long    dumpnum = 1;
  82 long    volno = 0;
  83 long    ntrec;
  84 char    *dumpmap;
  85 char    *usedinomap;
  86 ino_t   maxino;
  87 time_t  dumptime;
  88 time_t  dumpdate;
  89 FILE    *terminal;
  90 char    *tmpdir;
  91 int     compare_ignore_not_found;
  92 int     compare_errors;
  93 char    filesys[NAMELEN];
  94 static const char *stdin_opt = NULL;
  95
  96 #ifdef  __linux__
  97 char    *__progname;
  98 #endif
  99
 100 static void obsolete __P((int *, char **[]));
 101 static void usage __P((void));
 102 static void use_stdin __P((const char *));
 103
 104 int
 105 main(int argc, char *argv[])
 106 {
 107         int ch;
 108         ino_t ino;
 109         char *inputdev = _PATH_DEFTAPE;
 110         char *symtbl = "./restoresymtable";
 111         char *p, name[MAXPATHLEN];
 112         FILE *filelist = NULL;
 113         char fname[MAXPATHLEN];
 114
 115         /* Temp files should *not* be readable.  We set permissions later. */
 116         (void) umask(077);
 117         filesys[0] = '\0';
 118 #ifdef  __linux__
 119         __progname = argv[0];
 120 #endif
 121
 122         if (argc < 2)
 123                 usage();
 124
 125         if ((inputdev = getenv("TAPE")) == NULL)
 126                 inputdev = _PATH_DEFTAPE;
 127         if ((tmpdir = getenv("TMPDIR")) == NULL)
 128                 tmpdir = _PATH_TMP;
 129         if ((tmpdir = strdup(tmpdir)) == NULL)
 130                 err(1, "malloc tmpdir");
 131         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 132                 ;
 133         obsolete(&argc, &argv);
 134 #ifdef KERBEROS
 135 #define optlist "b:CcdD:f:hikmMNRrs:tT:uvxX:y"
 136 #else
 137 #define optlist "b:CcdD:f:himMNRrs:tT:uvxX:y"
 138 #endif
 139         while ((ch = getopt(argc, argv, optlist)) != -1)
 140                 switch(ch) {
 141                 case 'b':
 142                         /* Change default tape blocksize. */
 143                         bflag = 1;
 144                         ntrec = strtol(optarg, &p, 10);
 145                         if (*p)
 146                                 errx(1, "illegal blocksize -- %s", optarg);
 147                         if (ntrec <= 0)
 148                                 errx(1, "block size must be greater than 0");
 149                         break;
 150                 case 'c':
 151                         cvtflag = 1;
 152                         break;
 153                 case 'D':
 154                         strncpy(filesys, optarg, NAMELEN);
 155                         filesys[NAMELEN - 1] = '\0';
 156                         break;
 157                 case 'T':
 158                         tmpdir = optarg;
 159                         break;
 160                 case 'd':
 161                         dflag = 1;
 162                         break;
 163                 case 'f':
 164                         if( !strcmp(optarg,"-") )
 165                                 use_stdin("-f");
 166                         inputdev = optarg;
 167                         break;
 168                 case 'h':
 169                         hflag = 0;
 170                         break;
 171 #ifdef KERBEROS
 172                 case 'k':
 173                         dokerberos = 1;
 174                         break;
 175 #endif
 176                 case 'C':
 177                 case 'i':
 178                 case 'R':
 179                 case 'r':
 180                 case 't':
 181                 case 'x':
 182                         if (command != '\0')
 183                                 errx(1,
 184                                     "%c and %c options are mutually exclusive",
 185                                     ch, command);
 186                         command = ch;
 187                         break;
 188                 case 'm':
 189                         mflag = 0;
 190                         break;
 191                 case 'M':
 192                         Mflag = 1;
 193                         break;
 194                 case 'N':
 195                         Nflag = 1;
 196                         break;
 197                 case 's':
 198                         /* Dumpnum (skip to) for multifile dump tapes. */
 199                         dumpnum = strtol(optarg, &p, 10);
 200                         if (*p)
 201                                 errx(1, "illegal dump number -- %s", optarg);
 202                         if (dumpnum <= 0)
 203                                 errx(1, "dump number must be greater than 0");
 204                         break;
 205                 case 'u':
 206                         uflag = 1;
 207                         break;
 208                 case 'v':
 209                         vflag = 1;
 210                         break;
 211                 case 'X':
 212                         if( !strcmp(optarg,"-") ) {
 213                                 use_stdin("-X");
 214                                 filelist = stdin;
 215                         }
 216                         else
 217                                 if ( !(filelist = fopen(optarg,"r")) )
 218                                         errx(1, "can't open file for reading -- %s", optarg);
 219                         break;
 220                 case 'y':
 221                         yflag = 1;
 222                         break;
 223                 default:
 224                         usage();
 225                 }
 226         argc -= optind;
 227         argv += optind;
 228
 229         if (command == '\0')
 230                 errx(1, "none of C, i, R, r, t or x options specified");
 231
 232         if (signal(SIGINT, onintr) == SIG_IGN)
 233                 (void) signal(SIGINT, SIG_IGN);
 234         if (signal(SIGTERM, onintr) == SIG_IGN)
 235                 (void) signal(SIGTERM, SIG_IGN);
 236         setlinebuf(stderr);
 237
 238         atexit(cleanup);
 239
 240         setinput(inputdev);
 241
 242         if (argc == 0 && !filelist) {
 243                 argc = 1;
 244                 *--argv = ".";
 245         }
 246
 247         switch (command) {
 248         /*
 249          * Compare contents of tape.
 250          */
 251         case 'C': {
 252                 struct stat stbuf;
 253
 254                 Vprintf(stdout, "Begin compare restore\n");
 255                 compare_ignore_not_found = 0;
 256                 compare_errors = 0;
 257                 setup();
 258                 printf("filesys = %s\n", filesys);
 259                 if (stat(filesys, &stbuf) < 0)
 260                         err(1, "cannot stat directory %s", filesys);
 261                 if (chdir(filesys) < 0)
 262                         err(1, "cannot cd to %s", filesys);
 263                 compare_ignore_not_found = dumptime > 0;
 264                 initsymtable((char *)0);
 265                 extractdirs(0);
 266                 treescan(".", ROOTINO, nodeupdates);
 267                 compareleaves();
 268                 checkrestore();
 269                 if (compare_errors) {
 270                         printf("Some files were modified!\n");
 271                         exit(2);
 272                 }
 273                 break;
 274         }
 275
 276         /*
 277          * Interactive mode.
 278          */
 279         case 'i':
 280                 setup();
 281                 extractdirs(1);
 282                 initsymtable(NULL);
 283                 runcmdshell();
 284                 break;
 285         /*
 286          * Incremental restoration of a file system.
 287          */
 288         case 'r':
 289                 setup();
 290                 if (dumptime > 0) {
 291                         /*
 292                          * This is an incremental dump tape.
 293                          */
 294                         Vprintf(stdout, "Begin incremental restore\n");
 295                         initsymtable(symtbl);
 296                         extractdirs(1);
 297                         removeoldleaves();
 298                         Vprintf(stdout, "Calculate node updates.\n");
 299                         treescan(".", ROOTINO, nodeupdates);
 300                         findunreflinks();
 301                         removeoldnodes();
 302                 } else {
 303                         /*
 304                          * This is a level zero dump tape.
 305                          */
 306                         Vprintf(stdout, "Begin level 0 restore\n");
 307                         initsymtable((char *)0);
 308                         extractdirs(1);
 309                         Vprintf(stdout, "Calculate extraction list.\n");
 310                         treescan(".", ROOTINO, nodeupdates);
 311                 }
 312                 createleaves(symtbl);
 313                 createlinks();
 314                 setdirmodes(FORCE);
 315                 checkrestore();
 316                 if (dflag) {
 317                         Vprintf(stdout, "Verify the directory structure\n");
 318                         treescan(".", ROOTINO, verifyfile);
 319                 }
 320                 dumpsymtable(symtbl, (long)1);
 321                 break;
 322         /*
 323          * Resume an incremental file system restoration.
 324          */
 325         case 'R':
 326                 initsymtable(symtbl);
 327                 skipmaps();
 328                 skipdirs();
 329                 createleaves(symtbl);
 330                 createlinks();
 331                 setdirmodes(FORCE);
 332                 checkrestore();
 333                 dumpsymtable(symtbl, (long)1);
 334                 break;
 335
 336 /* handle file names from either text file (-X) or the command line */
 337 #define NEXTFILE(p) \
 338         p = NULL; \
 339         if (argc) { \
 340                 --argc; \
 341                 p = *argv++; \
 342         } \
 343         else if (filelist) { \
 344                 if ((p = fgets(fname, MAXPATHLEN, filelist))) { \
 345                         if ( *p && *(p + strlen(p) - 1) == '\n' ) /* possible null string */ \
 346                                 *(p + strlen(p) - 1) = '\0'; \
 347                         if ( !*p ) /* skip empty lines */ \
 348                                 continue; \
 349                         } \
 350         }
 351
 352         /*
 353          * List contents of tape.
 354          */
 355         case 't':
 356                 setup();
 357                 extractdirs(0);
 358                 initsymtable((char *)0);
 359                 for (;;) {
 360                         NEXTFILE(p);
 361                         if (!p)
 362                                 break;
 363                         canon(p, name, sizeof(name));
 364                         ino = dirlookup(name);
 365                         if (ino == 0)
 366                                 continue;
 367                         treescan(name, ino, listfile);
 368                 }
 369                 break;
 370         /*
 371          * Batch extraction of tape contents.
 372          */
 373         case 'x':
 374                 setup();
 375                 extractdirs(1);
 376                 initsymtable((char *)0);
 377                 for (;;) {
 378                         NEXTFILE(p);
 379                         if (!p)
 380                                 break;
 381                         canon(p, name, sizeof(name));
 382                         ino = dirlookup(name);
 383                         if (ino == 0)
 384                                 continue;
 385                         if (mflag)
 386                                 pathcheck(name);
 387                         treescan(name, ino, addfile);
 388                 }
 389                 createfiles();
 390                 createlinks();
 391                 setdirmodes(0);
 392                 if (dflag)
 393                         checkrestore();
 394                 break;
 395         }
 396         exit(0);
 397         /* NOTREACHED */
 398         return 0;       /* gcc shut up */
 399 }
 400
 401 static void
 402 usage(void)
 403 {
 404 #ifdef __linux__
 405         const char *ext2ver, *ext2date;
 406
 407         ext2fs_get_library_version(&ext2ver, &ext2date);
 408         (void)fprintf(stderr, "%s %s (using libext2fs %s of %s)\n",
 409                       __progname, _DUMP_VERSION, ext2ver, ext2date);
 410 #else
 411         (void)fprintf(stderr, "%s %s\n", __progname, _DUMP_VERSION);
 412 #endif
 413
 414 #ifdef KERBEROS
 415 #define kerbflag "k"
 416 #else
 417 #define kerbflag
 418 #endif
 419         (void)fprintf(stderr,
 420           "usage:\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n",
 421           __progname, " -i [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno]",
 422           __progname, " -r [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno]",
 423           __progname, " -R [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno]",
 424           __progname, " -x [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]",
 425           __progname, " -t [-ch" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]");
 426         exit(1);
 427 }
 428
 429 /*
 430  * obsolete --
 431  *      Change set of key letters and ordered arguments into something
 432  *      getopt(3) will like.
 433  */
 434 static void
 435 obsolete(int *argcp, char **argvp[])
 436 {
 437         int argc, flags;
 438         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 439
 440         /* Setup. */
 441         argv = *argvp;
 442         argc = *argcp;
 443
 444         /* Return if no arguments or first argument has leading dash. */
 445         ap = argv[1];
 446         if (argc == 1 || *ap == '-')
 447                 return;
 448
 449         /* Allocate space for new arguments. */
 450         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 451             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 452                 err(1, "malloc args");
 453
 454         *nargv++ = *argv;
 455         argv += 2, argc -= 2;
 456
 457         for (flags = 0; *ap; ++ap) {
 458                 switch (*ap) {
 459                 case 'b':
 460                 case 'D':
 461                 case 'f':
 462                 case 's':
 463                 case 'T':
 464                 case 'X':
 465                         if (*argv == NULL) {
 466                                 warnx("option requires an argument -- %c", *ap);
 467                                 usage();
 468                         }
 469                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 470                                 err(1, "malloc arg");
 471                         nargv[0][0] = '-';
 472                         nargv[0][1] = *ap;
 473                         (void)strcpy(&nargv[0][2], *argv);
 474                         ++argv;
 475                         ++nargv;
 476                         break;
 477                 default:
 478                         if (!flags) {
 479                                 *p++ = '-';
 480                                 flags = 1;
 481                         }
 482                         *p++ = *ap;
 483                         break;
 484                 }
 485         }
 486
 487         /* Terminate flags. */
 488         if (flags) {
 489                 *p = '\0';
 490                 *nargv++ = flagsp;
 491         }
 492
 493         /* Copy remaining arguments. */
 494         while ((*nargv++ = *argv++));
 495
 496         /* Update argument count. */
 497         *argcp = nargv - *argvp - 1;
 498 }
 499
 500 /*
 501  * use_stdin --
 502  *      reserve stdin for opt (avoid conflicts)
 503  */
 504 void
 505 use_stdin(const char *opt)
 506 {
 507         if (stdin_opt)
 508                 errx(1, "can't handle standard input for both %s and %s",
 509                         stdin_opt, opt);
 510         stdin_opt = opt;
 511 }