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@cybercable.fr>, 1999-2000
   6  */
   7
   8 /*
   9  * Copyright (c) 1983, 1993
  10  *      The Regents of the University of California.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by the University of
  23  *      California, Berkeley and its contributors.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  */
  40
  41 #ifndef lint
  42 static const char rcsid[] =
  43         "$Id: main.c,v 1.11 2000/03/09 13:12:31 stelian Exp $";
  44 #endif /* not lint */
  45
  46 #include <sys/param.h>
  47 #include <sys/stat.h>
  48 #include <errno.h>
  49
  50 #ifdef  __linux__
  51 #include <linux/ext2_fs.h>
  52 #include <bsdcompat.h>
  53 #include <signal.h>
  54 #include <string.h>
  55 #else   /* __linux__ */
  56 #include <ufs/ufs/dinode.h>
  57 #endif  /* __linux__ */
  58 #include <protocols/dumprestore.h>
  59
  60 #include <compaterr.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <unistd.h>
  64
  65 #ifdef  __linux__
  66 #include <ext2fs/ext2fs.h>
  67 #include <getopt.h>
  68 #endif
  69
  70 #include "pathnames.h"
  71 #include "restore.h"
  72 #include "extern.h"
  73
  74 int     bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
  75 int     hflag = 1, mflag = 1, Nflag = 0;
  76 int     uflag = 0;
  77 int     dokerberos = 0;
  78 char    command = '\0';
  79 long    dumpnum = 1;
  80 long    volno = 0;
  81 long    ntrec;
  82 char    *dumpmap;
  83 char    *usedinomap;
  84 ino_t   maxino;
  85 time_t  dumptime;
  86 time_t  dumpdate;
  87 FILE    *terminal;
  88 char    *tmpdir;
  89 int     compare_ignore_not_found;
  90 char    filesys[NAMELEN];
  91 static const char *stdin_opt = NULL;
  92
  93 #ifdef  __linux__
  94 char    *__progname;
  95 #endif
  96
  97 static void obsolete __P((int *, char **[]));
  98 static void usage __P((void));
  99 static void use_stdin __P((const char *));
 100
 101 int
 102 main(int argc, char *argv[])
 103 {
 104         int ch;
 105         ino_t ino;
 106         char *inputdev = _PATH_DEFTAPE;
 107         char *symtbl = "./restoresymtable";
 108         char *p, name[MAXPATHLEN];
 109         FILE *filelist = NULL;
 110         char fname[MAXPATHLEN];
 111
 112         /* Temp files should *not* be readable.  We set permissions later. */
 113         (void) umask(077);
 114         filesys[0] = '\0';
 115 #ifdef  __linux__
 116         __progname = argv[0];
 117 #endif
 118
 119         if (argc < 2)
 120                 usage();
 121
 122         if ((inputdev = getenv("TAPE")) == NULL)
 123                 inputdev = _PATH_DEFTAPE;
 124         if ((tmpdir = getenv("TMPDIR")) == NULL)
 125                 tmpdir = _PATH_TMP;
 126         if ((tmpdir = strdup(tmpdir)) == NULL)
 127                 err(1, "malloc tmpdir");
 128         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 129                 ;
 130         obsolete(&argc, &argv);
 131 #ifdef KERBEROS
 132 #define optlist "b:CcdD:f:hikmMNRrs:tT:uvxX:y"
 133 #else
 134 #define optlist "b:CcdD:f:himMNRrs:tT:uvxX:y"
 135 #endif
 136         while ((ch = getopt(argc, argv, optlist)) != -1)
 137                 switch(ch) {
 138                 case 'b':
 139                         /* Change default tape blocksize. */
 140                         bflag = 1;
 141                         ntrec = strtol(optarg, &p, 10);
 142                         if (*p)
 143                                 errx(1, "illegal blocksize -- %s", optarg);
 144                         if (ntrec <= 0)
 145                                 errx(1, "block size must be greater than 0");
 146                         break;
 147                 case 'c':
 148                         cvtflag = 1;
 149                         break;
 150                 case 'D':
 151                         strncpy(filesys, optarg, NAMELEN);
 152                         filesys[NAMELEN - 1] = '\0';
 153                         break;
 154                 case 'T':
 155                         tmpdir = optarg;
 156                         break;
 157                 case 'd':
 158                         dflag = 1;
 159                         break;
 160                 case 'f':
 161                         if( !strcmp(optarg,"-") )
 162                                 use_stdin("-f");
 163                         inputdev = optarg;
 164                         break;
 165                 case 'h':
 166                         hflag = 0;
 167                         break;
 168 #ifdef KERBEROS
 169                 case 'k':
 170                         dokerberos = 1;
 171                         break;
 172 #endif
 173                 case 'C':
 174                 case 'i':
 175                 case 'R':
 176                 case 'r':
 177                 case 't':
 178                 case 'x':
 179                         if (command != '\0')
 180                                 errx(1,
 181                                     "%c and %c options are mutually exclusive",
 182                                     ch, command);
 183                         command = ch;
 184                         break;
 185                 case 'm':
 186                         mflag = 0;
 187                         break;
 188                 case 'M':
 189                         Mflag = 1;
 190                         break;
 191                 case 'N':
 192                         Nflag = 1;
 193                         break;
 194                 case 's':
 195                         /* Dumpnum (skip to) for multifile dump tapes. */
 196                         dumpnum = strtol(optarg, &p, 10);
 197                         if (*p)
 198                                 errx(1, "illegal dump number -- %s", optarg);
 199                         if (dumpnum <= 0)
 200                                 errx(1, "dump number must be greater than 0");
 201                         break;
 202                 case 'u':
 203                         uflag = 1;
 204                         break;
 205                 case 'v':
 206                         vflag = 1;
 207                         break;
 208                 case 'X':
 209                         if( !strcmp(optarg,"-") ) {
 210                                 use_stdin("-X");
 211                                 filelist = stdin;
 212                         }
 213                         else
 214                                 if ( !(filelist = fopen(optarg,"r")) )
 215                                         errx(1, "can't open file for reading -- %s", optarg);
 216                         break;
 217                 case 'y':
 218                         yflag = 1;
 219                         break;
 220                 default:
 221                         usage();
 222                 }
 223         argc -= optind;
 224         argv += optind;
 225
 226         if (command == '\0')
 227                 errx(1, "none of C, i, R, r, t or x options specified");
 228
 229         if (signal(SIGINT, onintr) == SIG_IGN)
 230                 (void) signal(SIGINT, SIG_IGN);
 231         if (signal(SIGTERM, onintr) == SIG_IGN)
 232                 (void) signal(SIGTERM, SIG_IGN);
 233         setlinebuf(stderr);
 234
 235         atexit(cleanup);
 236
 237         setinput(inputdev);
 238
 239         if (argc == 0 && !filelist) {
 240                 argc = 1;
 241                 *--argv = ".";
 242         }
 243
 244         switch (command) {
 245         /*
 246          * Compare contents of tape.
 247          */
 248         case 'C': {
 249                 struct stat stbuf;
 250
 251                 Vprintf(stdout, "Begin compare restore\n");
 252                 compare_ignore_not_found = 0;
 253                 setup();
 254                 printf("filesys = %s\n", filesys);
 255                 if (stat(filesys, &stbuf) < 0)
 256                         err(1, "cannot stat directory %s", filesys);
 257                 if (chdir(filesys) < 0)
 258                         err(1, "cannot cd to %s", filesys);
 259                 compare_ignore_not_found = dumptime > 0;
 260                 initsymtable((char *)0);
 261                 extractdirs(0);
 262                 treescan(".", ROOTINO, nodeupdates);
 263                 compareleaves();
 264                 checkrestore();
 265                 break;
 266         }
 267
 268         /*
 269          * Interactive mode.
 270          */
 271         case 'i':
 272                 setup();
 273                 extractdirs(1);
 274                 initsymtable(NULL);
 275                 runcmdshell();
 276                 break;
 277         /*
 278          * Incremental restoration of a file system.
 279          */
 280         case 'r':
 281                 setup();
 282                 if (dumptime > 0) {
 283                         /*
 284                          * This is an incremental dump tape.
 285                          */
 286                         Vprintf(stdout, "Begin incremental restore\n");
 287                         initsymtable(symtbl);
 288                         extractdirs(1);
 289                         removeoldleaves();
 290                         Vprintf(stdout, "Calculate node updates.\n");
 291                         treescan(".", ROOTINO, nodeupdates);
 292                         findunreflinks();
 293                         removeoldnodes();
 294                 } else {
 295                         /*
 296                          * This is a level zero dump tape.
 297                          */
 298                         Vprintf(stdout, "Begin level 0 restore\n");
 299                         initsymtable((char *)0);
 300                         extractdirs(1);
 301                         Vprintf(stdout, "Calculate extraction list.\n");
 302                         treescan(".", ROOTINO, nodeupdates);
 303                 }
 304                 createleaves(symtbl);
 305                 createlinks();
 306                 setdirmodes(FORCE);
 307                 checkrestore();
 308                 if (dflag) {
 309                         Vprintf(stdout, "Verify the directory structure\n");
 310                         treescan(".", ROOTINO, verifyfile);
 311                 }
 312                 dumpsymtable(symtbl, (long)1);
 313                 break;
 314         /*
 315          * Resume an incremental file system restoration.
 316          */
 317         case 'R':
 318                 initsymtable(symtbl);
 319                 skipmaps();
 320                 skipdirs();
 321                 createleaves(symtbl);
 322                 createlinks();
 323                 setdirmodes(FORCE);
 324                 checkrestore();
 325                 dumpsymtable(symtbl, (long)1);
 326                 break;
 327
 328 /* handle file names from either text file (-X) or the command line */
 329 #define NEXTFILE(p) \
 330         p = NULL; \
 331         if (argc) { \
 332                 --argc; \
 333                 p = *argv++; \
 334         } \
 335         else if (filelist) { \
 336                 if ((p = fgets(fname, MAXPATHLEN, filelist))) { \
 337                         if ( *p && *(p + strlen(p) - 1) == '\n' ) /* possible null string */ \
 338                                 *(p + strlen(p) - 1) = '\0'; \
 339                         if ( !*p ) /* skip empty lines */ \
 340                                 continue; \
 341                         } \
 342         }
 343
 344         /*
 345          * List contents of tape.
 346          */
 347         case 't':
 348                 setup();
 349                 extractdirs(0);
 350                 initsymtable((char *)0);
 351                 for (;;) {
 352                         NEXTFILE(p);
 353                         if (!p)
 354                                 break;
 355                         canon(p, name, sizeof(name));
 356                         ino = dirlookup(name);
 357                         if (ino == 0)
 358                                 continue;
 359                         treescan(name, ino, listfile);
 360                 }
 361                 break;
 362         /*
 363          * Batch extraction of tape contents.
 364          */
 365         case 'x':
 366                 setup();
 367                 extractdirs(1);
 368                 initsymtable((char *)0);
 369                 for (;;) {
 370                         NEXTFILE(p);
 371                         if (!p)
 372                                 break;
 373                         canon(p, name, sizeof(name));
 374                         ino = dirlookup(name);
 375                         if (ino == 0)
 376                                 continue;
 377                         if (mflag)
 378                                 pathcheck(name);
 379                         treescan(name, ino, addfile);
 380                 }
 381                 createfiles();
 382                 createlinks();
 383                 setdirmodes(0);
 384                 if (dflag)
 385                         checkrestore();
 386                 break;
 387         }
 388         exit(0);
 389         /* NOTREACHED */
 390         return 0;       /* gcc shut up */
 391 }
 392
 393 static void
 394 usage(void)
 395 {
 396 #ifdef KERBEROS
 397 #define kerbflag "k"
 398 #else
 399 #define kerbflag
 400 #endif
 401         (void)fprintf(stderr,
 402           "%s %s\n", __progname, _DUMP_VERSION);
 403         (void)fprintf(stderr,
 404           "usage:\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n",
 405           __progname, " -i [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno]",
 406           __progname, " -r [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno]",
 407           __progname, " -R [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno]",
 408           __progname, " -x [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]",
 409           __progname, " -t [-ch" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-X filelist] [file ...]");
 410         exit(1);
 411 }
 412
 413 /*
 414  * obsolete --
 415  *      Change set of key letters and ordered arguments into something
 416  *      getopt(3) will like.
 417  */
 418 static void
 419 obsolete(int *argcp, char **argvp[])
 420 {
 421         int argc, flags;
 422         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 423
 424         /* Setup. */
 425         argv = *argvp;
 426         argc = *argcp;
 427
 428         /* Return if no arguments or first argument has leading dash. */
 429         ap = argv[1];
 430         if (argc == 1 || *ap == '-')
 431                 return;
 432
 433         /* Allocate space for new arguments. */
 434         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 435             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 436                 err(1, "malloc args");
 437
 438         *nargv++ = *argv;
 439         argv += 2, argc -= 2;
 440
 441         for (flags = 0; *ap; ++ap) {
 442                 switch (*ap) {
 443                 case 'b':
 444                 case 'D':
 445                 case 'f':
 446                 case 's':
 447                 case 'T':
 448                 case 'X':
 449                         if (*argv == NULL) {
 450                                 warnx("option requires an argument -- %c", *ap);
 451                                 usage();
 452                         }
 453                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 454                                 err(1, "malloc arg");
 455                         nargv[0][0] = '-';
 456                         nargv[0][1] = *ap;
 457                         (void)strcpy(&nargv[0][2], *argv);
 458                         ++argv;
 459                         ++nargv;
 460                         break;
 461                 default:
 462                         if (!flags) {
 463                                 *p++ = '-';
 464                                 flags = 1;
 465                         }
 466                         *p++ = *ap;
 467                         break;
 468                 }
 469         }
 470
 471         /* Terminate flags. */
 472         if (flags) {
 473                 *p = '\0';
 474                 *nargv++ = flagsp;
 475         }
 476
 477         /* Copy remaining arguments. */
 478         while ((*nargv++ = *argv++));
 479
 480         /* Update argument count. */
 481         *argcp = nargv - *argvp - 1;
 482 }
 483
 484 /*
 485  * use_stdin --
 486  *      reserve stdin for opt (avoid conflicts)
 487  */
 488 void
 489 use_stdin(const char *opt)
 490 {
 491         if (stdin_opt)
 492                 errx(1, "can't handle standard input for both %s and %s",
 493                         stdin_opt, opt);
 494         stdin_opt = opt;
 495 }