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 1.19 2001/03/23 14:40:12 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
 119         /* Temp files should *not* be readable.  We set permissions later. */
 120         (void) umask(077);
 121         filesys[0] = '\0';
 122 #ifdef  __linux__
 123         __progname = argv[0];
 124 #endif
 125
 126         if (argc < 2)
 127                 usage();
 128
 129         if ((inputdev = getenv("TAPE")) == NULL)
 130                 inputdev = _PATH_DEFTAPE;
 131         if ((tmpdir = getenv("TMPDIR")) == NULL)
 132                 tmpdir = _PATH_TMP;
 133         if ((tmpdir = strdup(tmpdir)) == NULL)
 134                 err(1, "malloc tmpdir");
 135         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 136                 ;
 137         obsolete(&argc, &argv);
 138 #ifdef KERBEROS
 139 #define optlist "b:CcdD:f:hikmMNRrs:tT:uvxX:y"
 140 #else
 141 #define optlist "b:CcdD:f:himMNRrs:tT:uvxX:y"
 142 #endif
 143         while ((ch = getopt(argc, argv, optlist)) != -1)
 144                 switch(ch) {
 145                 case 'b':
 146                         /* Change default tape blocksize. */
 147                         bflag = 1;
 148                         ntrec = strtol(optarg, &p, 10);
 149                         if (*p)
 150                                 errx(1, "illegal blocksize -- %s", optarg);
 151                         if (ntrec <= 0)
 152                                 errx(1, "block size must be greater than 0");
 153                         break;
 154                 case 'c':
 155                         cvtflag = 1;
 156                         break;
 157                 case 'D':
 158                         strncpy(filesys, optarg, NAMELEN);
 159                         filesys[NAMELEN - 1] = '\0';
 160                         break;
 161                 case 'T':
 162                         tmpdir = optarg;
 163                         break;
 164                 case 'd':
 165                         dflag = 1;
 166                         break;
 167                 case 'f':
 168                         if( !strcmp(optarg,"-") )
 169                                 use_stdin("-f");
 170                         inputdev = optarg;
 171                         break;
 172                 case 'h':
 173                         hflag = 0;
 174                         break;
 175 #ifdef KERBEROS
 176                 case 'k':
 177                         dokerberos = 1;
 178                         break;
 179 #endif
 180                 case 'C':
 181                 case 'i':
 182                 case 'R':
 183                 case 'r':
 184                 case 't':
 185                 case 'x':
 186                         if (command != '\0')
 187                                 errx(1,
 188                                     "%c and %c options are mutually exclusive",
 189                                     ch, command);
 190                         command = ch;
 191                         break;
 192                 case 'm':
 193                         mflag = 0;
 194                         break;
 195                 case 'M':
 196                         Mflag = 1;
 197                         break;
 198                 case 'N':
 199                         Nflag = 1;
 200                         break;
 201                 case 's':
 202                         /* Dumpnum (skip to) for multifile dump tapes. */
 203                         dumpnum = strtol(optarg, &p, 10);
 204                         if (*p)
 205                                 errx(1, "illegal dump number -- %s", optarg);
 206                         if (dumpnum <= 0)
 207                                 errx(1, "dump number must be greater than 0");
 208                         break;
 209                 case 'u':
 210                         uflag = 1;
 211                         break;
 212                 case 'v':
 213                         vflag = 1;
 214                         break;
 215                 case 'X':
 216                         if( !strcmp(optarg,"-") ) {
 217                                 use_stdin("-X");
 218                                 filelist = stdin;
 219                         }
 220                         else
 221                                 if ( !(filelist = fopen(optarg,"r")) )
 222                                         errx(1, "can't open file for reading -- %s", optarg);
 223                         break;
 224                 case 'y':
 225                         yflag = 1;
 226                         break;
 227                 default:
 228                         usage();
 229                 }
 230         argc -= optind;
 231         argv += optind;
 232
 233         if (command == '\0')
 234                 errx(1, "none of C, i, R, r, t or x options specified");
 235
 236         if (signal(SIGINT, onintr) == SIG_IGN)
 237                 (void) signal(SIGINT, SIG_IGN);
 238         if (signal(SIGTERM, onintr) == SIG_IGN)
 239                 (void) signal(SIGTERM, SIG_IGN);
 240         setlinebuf(stderr);
 241
 242         atexit(cleanup);
 243
 244         setinput(inputdev);
 245
 246         if (argc == 0 && !filelist) {
 247                 argc = 1;
 248                 *--argv = ".";
 249         }
 250
 251         switch (command) {
 252         /*
 253          * Compare contents of tape.
 254          */
 255         case 'C': {
 256                 struct stat stbuf;
 257
 258                 Vprintf(stdout, "Begin compare restore\n");
 259                 compare_ignore_not_found = 0;
 260                 compare_errors = 0;
 261                 setup();
 262                 printf("filesys = %s\n", filesys);
 263                 if (stat(filesys, &stbuf) < 0)
 264                         err(1, "cannot stat directory %s", filesys);
 265                 if (chdir(filesys) < 0)
 266                         err(1, "cannot cd to %s", filesys);
 267                 compare_ignore_not_found = dumptime > 0;
 268                 initsymtable((char *)0);
 269                 extractdirs(0);
 270                 treescan(".", ROOTINO, nodeupdates);
 271                 compareleaves();
 272                 checkrestore();
 273                 if (compare_errors) {
 274                         printf("Some files were modified!\n");
 275                         exit(2);
 276                 }
 277                 break;
 278         }
 279
 280         /*
 281          * Interactive mode.
 282          */
 283         case 'i':
 284                 setup();
 285                 extractdirs(1);
 286                 initsymtable(NULL);
 287                 runcmdshell();
 288                 break;
 289         /*
 290          * Incremental restoration of a file system.
 291          */
 292         case 'r':
 293                 setup();
 294                 if (dumptime > 0) {
 295                         /*
 296                          * This is an incremental dump tape.
 297                          */
 298                         Vprintf(stdout, "Begin incremental restore\n");
 299                         initsymtable(symtbl);
 300                         extractdirs(1);
 301                         removeoldleaves();
 302                         Vprintf(stdout, "Calculate node updates.\n");
 303                         treescan(".", ROOTINO, nodeupdates);
 304                         findunreflinks();
 305                         removeoldnodes();
 306                 } else {
 307                         /*
 308                          * This is a level zero dump tape.
 309                          */
 310                         Vprintf(stdout, "Begin level 0 restore\n");
 311                         initsymtable((char *)0);
 312                         extractdirs(1);
 313                         Vprintf(stdout, "Calculate extraction list.\n");
 314                         treescan(".", ROOTINO, nodeupdates);
 315                 }
 316                 createleaves(symtbl);
 317                 createlinks();
 318                 setdirmodes(FORCE);
 319                 checkrestore();
 320                 if (dflag) {
 321                         Vprintf(stdout, "Verify the directory structure\n");
 322                         treescan(".", ROOTINO, verifyfile);
 323                 }
 324                 dumpsymtable(symtbl, (long)1);
 325                 break;
 326         /*
 327          * Resume an incremental file system restoration.
 328          */
 329         case 'R':
 330                 initsymtable(symtbl);
 331                 skipmaps();
 332                 skipdirs();
 333                 createleaves(symtbl);
 334                 createlinks();
 335                 setdirmodes(FORCE);
 336                 checkrestore();
 337                 dumpsymtable(symtbl, (long)1);
 338                 break;
 339
 340 /* handle file names from either text file (-X) or the command line */
 341 #define NEXTFILE(p) \
 342         p = NULL; \
 343         if (argc) { \
 344                 --argc; \
 345                 p = *argv++; \
 346         } \
 347         else if (filelist) { \
 348                 if ((p = fgets(fname, MAXPATHLEN, filelist))) { \
 349                         if ( *p && *(p + strlen(p) - 1) == '\n' ) /* possible null string */ \
 350                                 *(p + strlen(p) - 1) = '\0'; \
 351                         if ( !*p ) /* skip empty lines */ \
 352                                 continue; \
 353                         } \
 354         }
 355
 356         /*
 357          * List contents of tape.
 358          */
 359         case 't':
 360                 setup();
 361                 extractdirs(0);
 362                 initsymtable((char *)0);
 363                 for (;;) {
 364                         NEXTFILE(p);
 365                         if (!p)
 366                                 break;
 367                         canon(p, name, sizeof(name));
 368                         ino = dirlookup(name);
 369                         if (ino == 0)
 370                                 continue;
 371                         treescan(name, ino, listfile);
 372                 }
 373                 break;
 374         /*
 375          * Batch extraction of tape contents.
 376          */
 377         case 'x':
 378                 setup();
 379                 extractdirs(1);
 380                 initsymtable((char *)0);
 381                 for (;;) {
 382                         NEXTFILE(p);
 383                         if (!p)
 384                                 break;
 385                         canon(p, name, sizeof(name));
 386                         ino = dirlookup(name);
 387                         if (ino == 0)
 388                                 continue;
 389                         if (mflag)
 390                                 pathcheck(name);
 391                         treescan(name, ino, addfile);
 392                 }
 393                 createfiles();
 394                 createlinks();
 395                 setdirmodes(0);
 396                 if (dflag)
 397                         checkrestore();
 398                 break;
 399         }
 400         exit(0);
 401         /* NOTREACHED */
 402         return 0;       /* gcc shut up */
 403 }
 404
 405 static void
 406 usage(void)
 407 {
 408 #ifdef __linux__
 409         const char *ext2ver, *ext2date;
 410
 411         ext2fs_get_library_version(&ext2ver, &ext2date);
 412         (void)fprintf(stderr, "%s %s (using libext2fs %s of %s)\n",
 413                       __progname, _DUMP_VERSION, ext2ver, ext2date);
 414 #else
 415         (void)fprintf(stderr, "%s %s\n", __progname, _DUMP_VERSION);
 416 #endif
 417
 418 #ifdef KERBEROS
 419 #define kerbflag "k"
 420 #else
 421 #define kerbflag
 422 #endif
 423         (void)fprintf(stderr,
 424           "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",
 425           __progname, " -C [-c" kerbflag "Mvy] [-b blocksize] [-D filesystem] [-f file] [-s fileno]",
 426           __progname, " -i [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno]",
 427           __progname, " -r [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-T directory]",
 428           __progname, " -R [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-T directory]",
 429           __progname, " -t [-ch" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]",
 430           __progname, " -x [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]");
 431         exit(1);
 432 }
 433
 434 /*
 435  * obsolete --
 436  *      Change set of key letters and ordered arguments into something
 437  *      getopt(3) will like.
 438  */
 439 static void
 440 obsolete(int *argcp, char **argvp[])
 441 {
 442         int argc, flags;
 443         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 444
 445         /* Setup. */
 446         argv = *argvp;
 447         argc = *argcp;
 448
 449         /* Return if no arguments or first argument has leading dash. */
 450         ap = argv[1];
 451         if (argc == 1 || *ap == '-')
 452                 return;
 453
 454         /* Allocate space for new arguments. */
 455         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 456             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 457                 err(1, "malloc args");
 458
 459         *nargv++ = *argv;
 460         argv += 2, argc -= 2;
 461
 462         for (flags = 0; *ap; ++ap) {
 463                 switch (*ap) {
 464                 case 'b':
 465                 case 'D':
 466                 case 'f':
 467                 case 's':
 468                 case 'T':
 469                 case 'X':
 470                         if (*argv == NULL) {
 471                                 warnx("option requires an argument -- %c", *ap);
 472                                 usage();
 473                         }
 474                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 475                                 err(1, "malloc arg");
 476                         nargv[0][0] = '-';
 477                         nargv[0][1] = *ap;
 478                         (void)strcpy(&nargv[0][2], *argv);
 479                         ++argv;
 480                         ++nargv;
 481                         break;
 482                 default:
 483                         if (!flags) {
 484                                 *p++ = '-';
 485                                 flags = 1;
 486                         }
 487                         *p++ = *ap;
 488                         break;
 489                 }
 490         }
 491
 492         /* Terminate flags. */
 493         if (flags) {
 494                 *p = '\0';
 495                 *nargv++ = flagsp;
 496         }
 497
 498         /* Copy remaining arguments. */
 499         while ((*nargv++ = *argv++));
 500
 501         /* Update argument count. */
 502         *argcp = nargv - *argvp - 1;
 503 }
 504
 505 /*
 506  * use_stdin --
 507  *      reserve stdin for opt (avoid conflicts)
 508  */
 509 void
 510 use_stdin(const char *opt)
 511 {
 512         if (stdin_opt)
 513                 errx(1, "can't handle standard input for both %s and %s",
 514                         stdin_opt, opt);
 515         stdin_opt = opt;
 516 }