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 /*
  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 copyright[] =
  44 "@(#) Copyright (c) 1983, 1993\n\
  45         The Regents of the University of California.  All rights reserved.\n";
  46 #endif /* not lint */
  47
  48 #ifndef lint
  49 #if 0
  50 static char sccsid[] = "@(#)main.c      8.6 (Berkeley) 5/4/95";
  51 #endif
  52 static const char rcsid[] =
  53         "$Id: main.c,v 1.4 1999/10/11 13:08:09 stelian Exp $";
  54 #endif /* not lint */
  55
  56 #include <sys/param.h>
  57 #include <sys/stat.h>
  58 #include <errno.h>
  59
  60 #ifdef  __linux__
  61 #include <linux/ext2_fs.h>
  62 #include <bsdcompat.h>
  63 #include <signal.h>
  64 #include <string.h>
  65 #else   /* __linux__ */
  66 #include <ufs/ufs/dinode.h>
  67 #endif  /* __linux__ */
  68 #include <protocols/dumprestore.h>
  69
  70 #include <compaterr.h>
  71 #include <stdio.h>
  72 #include <stdlib.h>
  73 #include <unistd.h>
  74
  75 #ifdef  __linux__
  76 #include <ext2fs/ext2fs.h>
  77 #include <getopt.h>
  78 #endif
  79
  80 #include "pathnames.h"
  81 #include "restore.h"
  82 #include "extern.h"
  83
  84 int     bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
  85 int     hflag = 1, mflag = 1, Nflag = 0;
  86 int     uflag = 0;
  87 int     dokerberos = 0;
  88 char    command = '\0';
  89 long    dumpnum = 1;
  90 long    volno = 0;
  91 long    ntrec;
  92 char    *dumpmap;
  93 char    *usedinomap;
  94 ino_t   maxino;
  95 time_t  dumptime;
  96 time_t  dumpdate;
  97 FILE    *terminal;
  98 char    *tmpdir;
  99 int     compare_ignore_not_found;
 100 char    *filesys = NULL;
 101
 102 #ifdef  __linux__
 103 char    *__progname;
 104 #endif
 105
 106 static void obsolete __P((int *, char **[]));
 107 static void usage __P((void));
 108
 109 int
 110 main(int argc, char *argv[])
 111 {
 112         int ch;
 113         ino_t ino;
 114         char *inputdev = _PATH_DEFTAPE;
 115         char *symtbl = "./restoresymtable";
 116         char *p, name[MAXPATHLEN];
 117
 118         /* Temp files should *not* be readable.  We set permissions later. */
 119         (void) umask(077);
 120
 121 #ifdef  __linux__
 122         __progname = argv[0];
 123 #endif
 124
 125         if (argc < 2)
 126                 usage();
 127
 128         if ((inputdev = getenv("TAPE")) == NULL)
 129                 inputdev = _PATH_DEFTAPE;
 130         if ((tmpdir = getenv("TMPDIR")) == NULL)
 131                 tmpdir = _PATH_TMP;
 132         if ((tmpdir = strdup(tmpdir)) == NULL)
 133                 err(1, "malloc tmpdir");
 134         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 135                 ;
 136         obsolete(&argc, &argv);
 137 #ifdef KERBEROS
 138 #define optlist "b:CcdD:f:hikmNRrs:tT:uvxy"
 139 #else
 140 #define optlist "b:CcdD:f:himNRrs:tT:uvxy"
 141 #endif
 142         while ((ch = getopt(argc, argv, optlist)) != -1)
 143                 switch(ch) {
 144                 case 'b':
 145                         /* Change default tape blocksize. */
 146                         bflag = 1;
 147                         ntrec = strtol(optarg, &p, 10);
 148                         if (*p)
 149                                 errx(1, "illegal blocksize -- %s", optarg);
 150                         if (ntrec <= 0)
 151                                 errx(1, "block size must be greater than 0");
 152                         break;
 153                 case 'c':
 154                         cvtflag = 1;
 155                         break;
 156                 case 'D':
 157                         filesys = optarg;
 158                         break;
 159                 case 'T':
 160                         tmpdir = optarg;
 161                         break;
 162                 case 'd':
 163                         dflag = 1;
 164                         break;
 165                 case '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 '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 'y':
 209                         yflag = 1;
 210                         break;
 211                 default:
 212                         usage();
 213                 }
 214         argc -= optind;
 215         argv += optind;
 216
 217         if (command == '\0')
 218                 errx(1, "none of C, i, R, r, t or x options specified");
 219
 220         if (signal(SIGINT, onintr) == SIG_IGN)
 221                 (void) signal(SIGINT, SIG_IGN);
 222         if (signal(SIGTERM, onintr) == SIG_IGN)
 223                 (void) signal(SIGTERM, SIG_IGN);
 224         setlinebuf(stderr);
 225
 226         atexit(cleanup);
 227
 228         setinput(inputdev);
 229
 230         if (argc == 0) {
 231                 argc = 1;
 232                 *--argv = ".";
 233         }
 234
 235         switch (command) {
 236         /*
 237          * Compare contents of tape.
 238          */
 239         case 'C': {
 240                 struct stat stbuf;
 241
 242                 Vprintf(stdout, "Begin compare restore\n");
 243                 compare_ignore_not_found = 0;
 244                 setup();
 245                 printf("filesys = %s\n", filesys);
 246                 if (stat(filesys, &stbuf) < 0)
 247                         err(1, "cannot stat directory %s", filesys);
 248                 if (chdir(filesys) < 0)
 249                         err(1, "cannot cd to %s", filesys);
 250                 compare_ignore_not_found = dumptime > 0;
 251                 initsymtable((char *)0);
 252                 extractdirs(0);
 253                 treescan(".", ROOTINO, nodeupdates);
 254                 compareleaves();
 255                 checkrestore();
 256                 break;
 257         }
 258
 259         /*
 260          * Interactive mode.
 261          */
 262         case 'i':
 263                 setup();
 264                 extractdirs(1);
 265                 initsymtable(NULL);
 266                 runcmdshell();
 267                 break;
 268         /*
 269          * Incremental restoration of a file system.
 270          */
 271         case 'r':
 272                 setup();
 273                 if (dumptime > 0) {
 274                         /*
 275                          * This is an incremental dump tape.
 276                          */
 277                         Vprintf(stdout, "Begin incremental restore\n");
 278                         initsymtable(symtbl);
 279                         extractdirs(1);
 280                         removeoldleaves();
 281                         Vprintf(stdout, "Calculate node updates.\n");
 282                         treescan(".", ROOTINO, nodeupdates);
 283                         findunreflinks();
 284                         removeoldnodes();
 285                 } else {
 286                         /*
 287                          * This is a level zero dump tape.
 288                          */
 289                         Vprintf(stdout, "Begin level 0 restore\n");
 290                         initsymtable((char *)0);
 291                         extractdirs(1);
 292                         Vprintf(stdout, "Calculate extraction list.\n");
 293                         treescan(".", ROOTINO, nodeupdates);
 294                 }
 295                 createleaves(symtbl);
 296                 createlinks();
 297                 setdirmodes(FORCE);
 298                 checkrestore();
 299                 if (dflag) {
 300                         Vprintf(stdout, "Verify the directory structure\n");
 301                         treescan(".", ROOTINO, verifyfile);
 302                 }
 303                 dumpsymtable(symtbl, (long)1);
 304                 break;
 305         /*
 306          * Resume an incremental file system restoration.
 307          */
 308         case 'R':
 309                 initsymtable(symtbl);
 310                 skipmaps();
 311                 skipdirs();
 312                 createleaves(symtbl);
 313                 createlinks();
 314                 setdirmodes(FORCE);
 315                 checkrestore();
 316                 dumpsymtable(symtbl, (long)1);
 317                 break;
 318         /*
 319          * List contents of tape.
 320          */
 321         case 't':
 322                 setup();
 323                 extractdirs(0);
 324                 initsymtable((char *)0);
 325                 while (argc--) {
 326                         canon(*argv++, name, sizeof(name));
 327                         ino = dirlookup(name);
 328                         if (ino == 0)
 329                                 continue;
 330                         treescan(name, ino, listfile);
 331                 }
 332                 break;
 333         /*
 334          * Batch extraction of tape contents.
 335          */
 336         case 'x':
 337                 setup();
 338                 extractdirs(1);
 339                 initsymtable((char *)0);
 340                 while (argc--) {
 341                         canon(*argv++, name, sizeof(name));
 342                         ino = dirlookup(name);
 343                         if (ino == 0)
 344                                 continue;
 345                         if (mflag)
 346                                 pathcheck(name);
 347                         treescan(name, ino, addfile);
 348                 }
 349                 createfiles();
 350                 createlinks();
 351                 setdirmodes(0);
 352                 if (dflag)
 353                         checkrestore();
 354                 break;
 355         }
 356         exit(0);
 357         /* NOTREACHED */
 358         return 0;       /* gcc shut up */
 359 }
 360
 361 static void
 362 usage(void)
 363 {
 364 #ifdef KERBEROS
 365 #define kerbflag "k"
 366 #else
 367 #define kerbflag
 368 #endif
 369         (void)fprintf(stderr, "usage:\t%s\n\t%s\n\t%s\n\t%s\n\t%s\n",
 370           "restore -i [-ch" kerbflag "muvy] [-b blocksize] [-f file] [-s fileno]",
 371           "restore -r [-c" kerbflag "uvy] [-b blocksize] [-f file] [-s fileno]",
 372           "restore -R [-c" kerbflag "uvy] [-b blocksize] [-f file] [-s fileno]",
 373           "restore -x [-ch" kerbflag "muvy] [-b blocksize] [-f file] [-s fileno] [file ...]",
 374           "restore -t [-ch" kerbflag "kuvy] [-b blocksize] [-f file] [-s fileno] [file ...]");
 375         exit(1);
 376 }
 377
 378 /*
 379  * obsolete --
 380  *      Change set of key letters and ordered arguments into something
 381  *      getopt(3) will like.
 382  */
 383 static void
 384 obsolete(int *argcp, char **argvp[])
 385 {
 386         int argc, flags;
 387         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 388
 389         /* Setup. */
 390         argv = *argvp;
 391         argc = *argcp;
 392
 393         /* Return if no arguments or first argument has leading dash. */
 394         ap = argv[1];
 395         if (argc == 1 || *ap == '-')
 396                 return;
 397
 398         /* Allocate space for new arguments. */
 399         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 400             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 401                 err(1, "malloc args");
 402
 403         *nargv++ = *argv;
 404         argv += 2, argc -= 2;
 405
 406         for (flags = 0; *ap; ++ap) {
 407                 switch (*ap) {
 408                 case 'b':
 409                 case 'f':
 410                 case 's':
 411                         if (*argv == NULL) {
 412                                 warnx("option requires an argument -- %c", *ap);
 413                                 usage();
 414                         }
 415                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 416                                 err(1, "malloc arg");
 417                         nargv[0][0] = '-';
 418                         nargv[0][1] = *ap;
 419                         (void)strcpy(&nargv[0][2], *argv);
 420                         ++argv;
 421                         ++nargv;
 422                         break;
 423                 default:
 424                         if (!flags) {
 425                                 *p++ = '-';
 426                                 flags = 1;
 427                         }
 428                         *p++ = *ap;
 429                         break;
 430                 }
 431         }
 432
 433         /* Terminate flags. */
 434         if (flags) {
 435                 *p = '\0';
 436                 *nargv++ = flagsp;
 437         }
 438
 439         /* Copy remaining arguments. */
 440         while ((*nargv++ = *argv++));
 441
 442         /* Update argument count. */
 443         *argcp = nargv - *argvp - 1;
 444 }