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
   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 1.6 1999/10/13 09:57:21 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 = NULL;
  91
  92 #ifdef  __linux__
  93 char    *__progname;
  94 #endif
  95
  96 static void obsolete __P((int *, char **[]));
  97 static void usage __P((void));
  98
  99 int
 100 main(int argc, char *argv[])
 101 {
 102         int ch;
 103         ino_t ino;
 104         char *inputdev = _PATH_DEFTAPE;
 105         char *symtbl = "./restoresymtable";
 106         char *p, name[MAXPATHLEN];
 107
 108         /* Temp files should *not* be readable.  We set permissions later. */
 109         (void) umask(077);
 110
 111 #ifdef  __linux__
 112         __progname = argv[0];
 113 #endif
 114
 115         if (argc < 2)
 116                 usage();
 117
 118         if ((inputdev = getenv("TAPE")) == NULL)
 119                 inputdev = _PATH_DEFTAPE;
 120         if ((tmpdir = getenv("TMPDIR")) == NULL)
 121                 tmpdir = _PATH_TMP;
 122         if ((tmpdir = strdup(tmpdir)) == NULL)
 123                 err(1, "malloc tmpdir");
 124         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 125                 ;
 126         obsolete(&argc, &argv);
 127 #ifdef KERBEROS
 128 #define optlist "b:CcdD:f:hikmNRrs:tT:uvxy"
 129 #else
 130 #define optlist "b:CcdD:f:himNRrs:tT:uvxy"
 131 #endif
 132         while ((ch = getopt(argc, argv, optlist)) != -1)
 133                 switch(ch) {
 134                 case 'b':
 135                         /* Change default tape blocksize. */
 136                         bflag = 1;
 137                         ntrec = strtol(optarg, &p, 10);
 138                         if (*p)
 139                                 errx(1, "illegal blocksize -- %s", optarg);
 140                         if (ntrec <= 0)
 141                                 errx(1, "block size must be greater than 0");
 142                         break;
 143                 case 'c':
 144                         cvtflag = 1;
 145                         break;
 146                 case 'D':
 147                         filesys = optarg;
 148                         break;
 149                 case 'T':
 150                         tmpdir = optarg;
 151                         break;
 152                 case 'd':
 153                         dflag = 1;
 154                         break;
 155                 case 'f':
 156                         inputdev = optarg;
 157                         break;
 158                 case 'h':
 159                         hflag = 0;
 160                         break;
 161 #ifdef KERBEROS
 162                 case 'k':
 163                         dokerberos = 1;
 164                         break;
 165 #endif
 166                 case 'C':
 167                 case 'i':
 168                 case 'R':
 169                 case 'r':
 170                 case 't':
 171                 case 'x':
 172                         if (command != '\0')
 173                                 errx(1,
 174                                     "%c and %c options are mutually exclusive",
 175                                     ch, command);
 176                         command = ch;
 177                         break;
 178                 case 'm':
 179                         mflag = 0;
 180                         break;
 181                 case 'N':
 182                         Nflag = 1;
 183                         break;
 184                 case 's':
 185                         /* Dumpnum (skip to) for multifile dump tapes. */
 186                         dumpnum = strtol(optarg, &p, 10);
 187                         if (*p)
 188                                 errx(1, "illegal dump number -- %s", optarg);
 189                         if (dumpnum <= 0)
 190                                 errx(1, "dump number must be greater than 0");
 191                         break;
 192                 case 'u':
 193                         uflag = 1;
 194                         break;
 195                 case 'v':
 196                         vflag = 1;
 197                         break;
 198                 case 'y':
 199                         yflag = 1;
 200                         break;
 201                 default:
 202                         usage();
 203                 }
 204         argc -= optind;
 205         argv += optind;
 206
 207         if (command == '\0')
 208                 errx(1, "none of C, i, R, r, t or x options specified");
 209
 210         if (signal(SIGINT, onintr) == SIG_IGN)
 211                 (void) signal(SIGINT, SIG_IGN);
 212         if (signal(SIGTERM, onintr) == SIG_IGN)
 213                 (void) signal(SIGTERM, SIG_IGN);
 214         setlinebuf(stderr);
 215
 216         atexit(cleanup);
 217
 218         setinput(inputdev);
 219
 220         if (argc == 0) {
 221                 argc = 1;
 222                 *--argv = ".";
 223         }
 224
 225         switch (command) {
 226         /*
 227          * Compare contents of tape.
 228          */
 229         case 'C': {
 230                 struct stat stbuf;
 231
 232                 Vprintf(stdout, "Begin compare restore\n");
 233                 compare_ignore_not_found = 0;
 234                 setup();
 235                 printf("filesys = %s\n", filesys);
 236                 if (stat(filesys, &stbuf) < 0)
 237                         err(1, "cannot stat directory %s", filesys);
 238                 if (chdir(filesys) < 0)
 239                         err(1, "cannot cd to %s", filesys);
 240                 compare_ignore_not_found = dumptime > 0;
 241                 initsymtable((char *)0);
 242                 extractdirs(0);
 243                 treescan(".", ROOTINO, nodeupdates);
 244                 compareleaves();
 245                 checkrestore();
 246                 break;
 247         }
 248
 249         /*
 250          * Interactive mode.
 251          */
 252         case 'i':
 253                 setup();
 254                 extractdirs(1);
 255                 initsymtable(NULL);
 256                 runcmdshell();
 257                 break;
 258         /*
 259          * Incremental restoration of a file system.
 260          */
 261         case 'r':
 262                 setup();
 263                 if (dumptime > 0) {
 264                         /*
 265                          * This is an incremental dump tape.
 266                          */
 267                         Vprintf(stdout, "Begin incremental restore\n");
 268                         initsymtable(symtbl);
 269                         extractdirs(1);
 270                         removeoldleaves();
 271                         Vprintf(stdout, "Calculate node updates.\n");
 272                         treescan(".", ROOTINO, nodeupdates);
 273                         findunreflinks();
 274                         removeoldnodes();
 275                 } else {
 276                         /*
 277                          * This is a level zero dump tape.
 278                          */
 279                         Vprintf(stdout, "Begin level 0 restore\n");
 280                         initsymtable((char *)0);
 281                         extractdirs(1);
 282                         Vprintf(stdout, "Calculate extraction list.\n");
 283                         treescan(".", ROOTINO, nodeupdates);
 284                 }
 285                 createleaves(symtbl);
 286                 createlinks();
 287                 setdirmodes(FORCE);
 288                 checkrestore();
 289                 if (dflag) {
 290                         Vprintf(stdout, "Verify the directory structure\n");
 291                         treescan(".", ROOTINO, verifyfile);
 292                 }
 293                 dumpsymtable(symtbl, (long)1);
 294                 break;
 295         /*
 296          * Resume an incremental file system restoration.
 297          */
 298         case 'R':
 299                 initsymtable(symtbl);
 300                 skipmaps();
 301                 skipdirs();
 302                 createleaves(symtbl);
 303                 createlinks();
 304                 setdirmodes(FORCE);
 305                 checkrestore();
 306                 dumpsymtable(symtbl, (long)1);
 307                 break;
 308         /*
 309          * List contents of tape.
 310          */
 311         case 't':
 312                 setup();
 313                 extractdirs(0);
 314                 initsymtable((char *)0);
 315                 while (argc--) {
 316                         canon(*argv++, name, sizeof(name));
 317                         ino = dirlookup(name);
 318                         if (ino == 0)
 319                                 continue;
 320                         treescan(name, ino, listfile);
 321                 }
 322                 break;
 323         /*
 324          * Batch extraction of tape contents.
 325          */
 326         case 'x':
 327                 setup();
 328                 extractdirs(1);
 329                 initsymtable((char *)0);
 330                 while (argc--) {
 331                         canon(*argv++, name, sizeof(name));
 332                         ino = dirlookup(name);
 333                         if (ino == 0)
 334                                 continue;
 335                         if (mflag)
 336                                 pathcheck(name);
 337                         treescan(name, ino, addfile);
 338                 }
 339                 createfiles();
 340                 createlinks();
 341                 setdirmodes(0);
 342                 if (dflag)
 343                         checkrestore();
 344                 break;
 345         }
 346         exit(0);
 347         /* NOTREACHED */
 348         return 0;       /* gcc shut up */
 349 }
 350
 351 static void
 352 usage(void)
 353 {
 354 #ifdef KERBEROS
 355 #define kerbflag "k"
 356 #else
 357 #define kerbflag
 358 #endif
 359         (void)fprintf(stderr,
 360           "%s %s\n", __progname, _DUMP_VERSION);
 361         (void)fprintf(stderr,
 362           "usage:\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n\t%s%s\n",
 363           __progname, " -i [-ch" kerbflag "muvy] [-b blocksize] [-f file] [-s fileno]",
 364           __progname, " -r [-c" kerbflag "uvy] [-b blocksize] [-f file] [-s fileno]",
 365           __progname, " -R [-c" kerbflag "uvy] [-b blocksize] [-f file] [-s fileno]",
 366           __progname, " -x [-ch" kerbflag "muvy] [-b blocksize] [-f file] [-s fileno] [file ...]",
 367           __progname, " -t [-ch" kerbflag "kuvy] [-b blocksize] [-f file] [-s fileno] [file ...]");
 368         exit(1);
 369 }
 370
 371 /*
 372  * obsolete --
 373  *      Change set of key letters and ordered arguments into something
 374  *      getopt(3) will like.
 375  */
 376 static void
 377 obsolete(int *argcp, char **argvp[])
 378 {
 379         int argc, flags;
 380         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 381
 382         /* Setup. */
 383         argv = *argvp;
 384         argc = *argcp;
 385
 386         /* Return if no arguments or first argument has leading dash. */
 387         ap = argv[1];
 388         if (argc == 1 || *ap == '-')
 389                 return;
 390
 391         /* Allocate space for new arguments. */
 392         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 393             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 394                 err(1, "malloc args");
 395
 396         *nargv++ = *argv;
 397         argv += 2, argc -= 2;
 398
 399         for (flags = 0; *ap; ++ap) {
 400                 switch (*ap) {
 401                 case 'b':
 402                 case 'f':
 403                 case 's':
 404                         if (*argv == NULL) {
 405                                 warnx("option requires an argument -- %c", *ap);
 406                                 usage();
 407                         }
 408                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 409                                 err(1, "malloc arg");
 410                         nargv[0][0] = '-';
 411                         nargv[0][1] = *ap;
 412                         (void)strcpy(&nargv[0][2], *argv);
 413                         ++argv;
 414                         ++nargv;
 415                         break;
 416                 default:
 417                         if (!flags) {
 418                                 *p++ = '-';
 419                                 flags = 1;
 420                         }
 421                         *p++ = *ap;
 422                         break;
 423                 }
 424         }
 425
 426         /* Terminate flags. */
 427         if (flags) {
 428                 *p = '\0';
 429                 *nargv++ = flagsp;
 430         }
 431
 432         /* Copy remaining arguments. */
 433         while ((*nargv++ = *argv++));
 434
 435         /* Update argument count. */
 436         *argcp = nargv - *argvp - 1;
 437 }