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 1.10 2000/03/08 11:25:58 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
  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         FILE *filelist = NULL;
 108         char fname[MAXPATHLEN];
 109
 110         /* Temp files should *not* be readable.  We set permissions later. */
 111         (void) umask(077);
 112         filesys[0] = '\0';
 113 #ifdef  __linux__
 114         __progname = argv[0];
 115 #endif
 116
 117         if (argc < 2)
 118                 usage();
 119
 120         if ((inputdev = getenv("TAPE")) == NULL)
 121                 inputdev = _PATH_DEFTAPE;
 122         if ((tmpdir = getenv("TMPDIR")) == NULL)
 123                 tmpdir = _PATH_TMP;
 124         if ((tmpdir = strdup(tmpdir)) == NULL)
 125                 err(1, "malloc tmpdir");
 126         for (p = tmpdir + strlen(tmpdir) - 1; p >= tmpdir && *p == '/'; p--)
 127                 ;
 128         obsolete(&argc, &argv);
 129 #ifdef KERBEROS
 130 #define optlist "b:CcdD:f:hikmMNRrs:tT:uvxX:y"
 131 #else
 132 #define optlist "b:CcdD:f:himMNRrs:tT:uvxX:y"
 133 #endif
 134         while ((ch = getopt(argc, argv, optlist)) != -1)
 135                 switch(ch) {
 136                 case 'b':
 137                         /* Change default tape blocksize. */
 138                         bflag = 1;
 139                         ntrec = strtol(optarg, &p, 10);
 140                         if (*p)
 141                                 errx(1, "illegal blocksize -- %s", optarg);
 142                         if (ntrec <= 0)
 143                                 errx(1, "block size must be greater than 0");
 144                         break;
 145                 case 'c':
 146                         cvtflag = 1;
 147                         break;
 148                 case 'D':
 149                         strncpy(filesys, optarg, NAMELEN);
 150                         filesys[NAMELEN - 1] = '\0';
 151                         break;
 152                 case 'T':
 153                         tmpdir = optarg;
 154                         break;
 155                 case 'd':
 156                         dflag = 1;
 157                         break;
 158                 case 'f':
 159                         inputdev = optarg;
 160                         break;
 161                 case 'h':
 162                         hflag = 0;
 163                         break;
 164 #ifdef KERBEROS
 165                 case 'k':
 166                         dokerberos = 1;
 167                         break;
 168 #endif
 169                 case 'C':
 170                 case 'i':
 171                 case 'R':
 172                 case 'r':
 173                 case 't':
 174                 case 'x':
 175                         if (command != '\0')
 176                                 errx(1,
 177                                     "%c and %c options are mutually exclusive",
 178                                     ch, command);
 179                         command = ch;
 180                         break;
 181                 case 'm':
 182                         mflag = 0;
 183                         break;
 184                 case 'M':
 185                         Mflag = 1;
 186                         break;
 187                 case 'N':
 188                         Nflag = 1;
 189                         break;
 190                 case 's':
 191                         /* Dumpnum (skip to) for multifile dump tapes. */
 192                         dumpnum = strtol(optarg, &p, 10);
 193                         if (*p)
 194                                 errx(1, "illegal dump number -- %s", optarg);
 195                         if (dumpnum <= 0)
 196                                 errx(1, "dump number must be greater than 0");
 197                         break;
 198                 case 'u':
 199                         uflag = 1;
 200                         break;
 201                 case 'v':
 202                         vflag = 1;
 203                         break;
 204                 case 'X':
 205                         if ( !(filelist=fopen(optarg,"r")) )
 206                                 errx(1, "can't open file for reading -- %s", optarg);
 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 #define NEXTFILE(p) \
 320         if (filelist) { \
 321                 if ((p = fgets(fname, MAXPATHLEN, filelist))) \
 322                         *(p + strlen(p) - 1) = '\0'; \
 323         } \
 324         else { \
 325                 if (argc--) \
 326                         p = *argv++; \
 327                 else \
 328                         p = NULL; \
 329         }
 330
 331         /*
 332          * List contents of tape.
 333          */
 334         case 't':
 335                 setup();
 336                 extractdirs(0);
 337                 initsymtable((char *)0);
 338                 for (;;) {
 339                         NEXTFILE(p);
 340                         if (!p)
 341                                 break;
 342                         canon(p, name, sizeof(name));
 343                         ino = dirlookup(name);
 344                         if (ino == 0)
 345                                 continue;
 346                         treescan(name, ino, listfile);
 347                 }
 348                 break;
 349         /*
 350          * Batch extraction of tape contents.
 351          */
 352         case 'x':
 353                 setup();
 354                 extractdirs(1);
 355                 initsymtable((char *)0);
 356                 for (;;) {
 357                         NEXTFILE(p);
 358                         if (!p)
 359                                 break;
 360                         canon(p, name, sizeof(name));
 361                         ino = dirlookup(name);
 362                         if (ino == 0)
 363                                 continue;
 364                         if (mflag)
 365                                 pathcheck(name);
 366                         treescan(name, ino, addfile);
 367                 }
 368                 createfiles();
 369                 createlinks();
 370                 setdirmodes(0);
 371                 if (dflag)
 372                         checkrestore();
 373                 break;
 374         }
 375         exit(0);
 376         /* NOTREACHED */
 377         return 0;       /* gcc shut up */
 378 }
 379
 380 static void
 381 usage(void)
 382 {
 383 #ifdef KERBEROS
 384 #define kerbflag "k"
 385 #else
 386 #define kerbflag
 387 #endif
 388         (void)fprintf(stderr,
 389           "%s %s\n", __progname, _DUMP_VERSION);
 390         (void)fprintf(stderr,
 391           "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\t%s%s\n",
 392           __progname, " -i [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno]",
 393           __progname, " -r [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno]",
 394           __progname, " -R [-c" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno]",
 395           __progname, " -x [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno] [file ...]",
 396           __progname, " -x [-ch" kerbflag "mMuvy] [-b blocksize] [-f file] [-s fileno] [-X filelist]",
 397           __progname, " -t [-ch" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [file ...]",
 398           __progname, " -t [-ch" kerbflag "Muvy] [-b blocksize] [-f file] [-s fileno] [-X filelist]");
 399         exit(1);
 400 }
 401
 402 /*
 403  * obsolete --
 404  *      Change set of key letters and ordered arguments into something
 405  *      getopt(3) will like.
 406  */
 407 static void
 408 obsolete(int *argcp, char **argvp[])
 409 {
 410         int argc, flags;
 411         char *ap, **argv, *flagsp = NULL, **nargv, *p = NULL;
 412
 413         /* Setup. */
 414         argv = *argvp;
 415         argc = *argcp;
 416
 417         /* Return if no arguments or first argument has leading dash. */
 418         ap = argv[1];
 419         if (argc == 1 || *ap == '-')
 420                 return;
 421
 422         /* Allocate space for new arguments. */
 423         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 424             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 425                 err(1, "malloc args");
 426
 427         *nargv++ = *argv;
 428         argv += 2, argc -= 2;
 429
 430         for (flags = 0; *ap; ++ap) {
 431                 switch (*ap) {
 432                 case 'b':
 433                 case 'D':
 434                 case 'f':
 435                 case 's':
 436                 case 'T':
 437                 case 'X':
 438                         if (*argv == NULL) {
 439                                 warnx("option requires an argument -- %c", *ap);
 440                                 usage();
 441                         }
 442                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 443                                 err(1, "malloc arg");
 444                         nargv[0][0] = '-';
 445                         nargv[0][1] = *ap;
 446                         (void)strcpy(&nargv[0][2], *argv);
 447                         ++argv;
 448                         ++nargv;
 449                         break;
 450                 default:
 451                         if (!flags) {
 452                                 *p++ = '-';
 453                                 flags = 1;
 454                         }
 455                         *p++ = *ap;
 456                         break;
 457                 }
 458         }
 459
 460         /* Terminate flags. */
 461         if (flags) {
 462                 *p = '\0';
 463                 *nargv++ = flagsp;
 464         }
 465
 466         /* Copy remaining arguments. */
 467         while ((*nargv++ = *argv++));
 468
 469         /* Update argument count. */
 470         *argcp = nargv - *argvp - 1;
 471 }