sbin/restore/main.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef lint
  31 static const char copyright[] =
  32 "@(#) Copyright (c) 1983, 1993\n\
  33         The Regents of the University of California.  All rights reserved.\n";
  34 #endif /* not lint */
  35
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)main.c      8.6 (Berkeley) 5/4/95";
  39 #endif
  40 #endif /* not lint */
  41
  42 #include <sys/cdefs.h>
  43 __FBSDID("$FreeBSD$");
  44
  45 #include <sys/param.h>
  46 #include <sys/stat.h>
  47
  48 #include <ufs/ufs/dinode.h>
  49 #include <protocols/dumprestore.h>
  50
  51 #include <err.h>
  52 #include <limits.h>
  53 #include <locale.h>
  54 #include <paths.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <unistd.h>
  59
  60 #include "restore.h"
  61 #include "extern.h"
  62
  63 int     bflag = 0, cvtflag = 0, dflag = 0, Dflag = 0, vflag = 0, yflag = 0;
  64 int     hflag = 1, mflag = 1, Nflag = 0;
  65 int     uflag = 0;
  66 int     pipecmd = 0;
  67 char    command = '\0';
  68 long    dumpnum = 1;
  69 long    volno = 0;
  70 long    ntrec;
  71 char    *dumpmap;
  72 char    *usedinomap;
  73 ino_t   maxino;
  74 time_t  dumptime;
  75 time_t  dumpdate;
  76 FILE    *terminal;
  77
  78 static void obsolete(int *, char **[]);
  79 static void usage(void) __dead2;
  80
  81 int
  82 main(int argc, char *argv[])
  83 {
  84         int ch;
  85         ino_t ino;
  86         char *inputdev;
  87         char *symtbl = "./restoresymtable";
  88         char *p, name[MAXPATHLEN];
  89
  90         /* Temp files should *not* be readable.  We set permissions later. */
  91         (void) umask(077);
  92
  93         if (argc < 2)
  94                 usage();
  95
  96         (void)setlocale(LC_ALL, "");
  97
  98         inputdev = NULL;
  99         obsolete(&argc, &argv);
 100         while ((ch = getopt(argc, argv, "b:dDf:himNP:Rrs:tuvxy")) != -1)
 101                 switch(ch) {
 102                 case 'b':
 103                         /* Change default tape blocksize. */
 104                         bflag = 1;
 105                         ntrec = strtol(optarg, &p, 10);
 106                         if (*p)
 107                                 errx(1, "illegal blocksize -- %s", optarg);
 108                         if (ntrec <= 0)
 109                                 errx(1, "block size must be greater than 0");
 110                         break;
 111                 case 'd':
 112                         dflag = 1;
 113                         break;
 114                 case 'D':
 115                         Dflag = 1;
 116                         break;
 117                 case 'f':
 118                         if (pipecmd)
 119                                 errx(1,
 120                                     "-P and -f options are mutually exclusive");
 121                         inputdev = optarg;
 122                         break;
 123                 case 'P':
 124                         if (!pipecmd && inputdev)
 125                                 errx(1,
 126                                     "-P and -f options are mutually exclusive");
 127                         inputdev = optarg;
 128                         pipecmd = 1;
 129                         break;
 130                 case 'h':
 131                         hflag = 0;
 132                         break;
 133                 case 'i':
 134                 case 'R':
 135                 case 'r':
 136                 case 't':
 137                 case 'x':
 138                         if (command != '\0')
 139                                 errx(1,
 140                                     "%c and %c options are mutually exclusive",
 141                                     ch, command);
 142                         command = ch;
 143                         break;
 144                 case 'm':
 145                         mflag = 0;
 146                         break;
 147                 case 'N':
 148                         Nflag = 1;
 149                         break;
 150                 case 's':
 151                         /* Dumpnum (skip to) for multifile dump tapes. */
 152                         dumpnum = strtol(optarg, &p, 10);
 153                         if (*p)
 154                                 errx(1, "illegal dump number -- %s", optarg);
 155                         if (dumpnum <= 0)
 156                                 errx(1, "dump number must be greater than 0");
 157                         break;
 158                 case 'u':
 159                         uflag = 1;
 160                         break;
 161                 case 'v':
 162                         vflag = 1;
 163                         break;
 164                 case 'y':
 165                         yflag = 1;
 166                         break;
 167                 default:
 168                         usage();
 169                 }
 170         argc -= optind;
 171         argv += optind;
 172
 173         if (command == '\0')
 174                 errx(1, "none of i, R, r, t or x options specified");
 175
 176         if (signal(SIGINT, onintr) == SIG_IGN)
 177                 (void) signal(SIGINT, SIG_IGN);
 178         if (signal(SIGTERM, onintr) == SIG_IGN)
 179                 (void) signal(SIGTERM, SIG_IGN);
 180         setlinebuf(stderr);
 181
 182         if (inputdev == NULL && (inputdev = getenv("TAPE")) == NULL)
 183                 inputdev = _PATH_DEFTAPE;
 184         setinput(inputdev, pipecmd);
 185
 186         if (argc == 0) {
 187                 argc = 1;
 188                 *--argv = ".";
 189         }
 190
 191         switch (command) {
 192         /*
 193          * Interactive mode.
 194          */
 195         case 'i':
 196                 setup();
 197                 extractdirs(1);
 198                 initsymtable(NULL);
 199                 runcmdshell();
 200                 break;
 201         /*
 202          * Incremental restoration of a file system.
 203          */
 204         case 'r':
 205                 setup();
 206                 if (dumptime > 0) {
 207                         /*
 208                          * This is an incremental dump tape.
 209                          */
 210                         vprintf(stdout, "Begin incremental restore\n");
 211                         initsymtable(symtbl);
 212                         extractdirs(1);
 213                         removeoldleaves();
 214                         vprintf(stdout, "Calculate node updates.\n");
 215                         treescan(".", ROOTINO, nodeupdates);
 216                         findunreflinks();
 217                         removeoldnodes();
 218                 } else {
 219                         /*
 220                          * This is a level zero dump tape.
 221                          */
 222                         vprintf(stdout, "Begin level 0 restore\n");
 223                         initsymtable((char *)0);
 224                         extractdirs(1);
 225                         vprintf(stdout, "Calculate extraction list.\n");
 226                         treescan(".", ROOTINO, nodeupdates);
 227                 }
 228                 createleaves(symtbl);
 229                 createlinks();
 230                 setdirmodes(FORCE);
 231                 checkrestore();
 232                 if (dflag) {
 233                         vprintf(stdout, "Verify the directory structure\n");
 234                         treescan(".", ROOTINO, verifyfile);
 235                 }
 236                 dumpsymtable(symtbl, (long)1);
 237                 break;
 238         /*
 239          * Resume an incremental file system restoration.
 240          */
 241         case 'R':
 242                 initsymtable(symtbl);
 243                 skipmaps();
 244                 skipdirs();
 245                 createleaves(symtbl);
 246                 createlinks();
 247                 setdirmodes(FORCE);
 248                 checkrestore();
 249                 dumpsymtable(symtbl, (long)1);
 250                 break;
 251         /*
 252          * List contents of tape.
 253          */
 254         case 't':
 255                 setup();
 256                 extractdirs(0);
 257                 initsymtable((char *)0);
 258                 while (argc--) {
 259                         canon(*argv++, name, sizeof(name));
 260                         ino = dirlookup(name);
 261                         if (ino == 0)
 262                                 continue;
 263                         treescan(name, ino, listfile);
 264                 }
 265                 break;
 266         /*
 267          * Batch extraction of tape contents.
 268          */
 269         case 'x':
 270                 setup();
 271                 extractdirs(1);
 272                 initsymtable((char *)0);
 273                 while (argc--) {
 274                         canon(*argv++, name, sizeof(name));
 275                         ino = dirlookup(name);
 276                         if (ino == 0)
 277                                 continue;
 278                         if (mflag)
 279                                 pathcheck(name);
 280                         treescan(name, ino, addfile);
 281                 }
 282                 createfiles();
 283                 createlinks();
 284                 setdirmodes(0);
 285                 if (dflag)
 286                         checkrestore();
 287                 break;
 288         }
 289         done(0);
 290         /* NOTREACHED */
 291 }
 292
 293 static void
 294 usage()
 295 {
 296         const char *const common =
 297             "[-b blocksize] [-f file | -P pipecommand] [-s fileno]";
 298         const char *const fileell = "[file ...]";
 299
 300         (void)fprintf(stderr, "usage:\t%s %s\n\t%s %s\n\t%s %s\n"
 301             "\t%s %s %s\n\t%s %s %s\n",
 302             "restore -i [-dhmNuvy]", common,
 303             "restore -R [-dNuvy]", common,
 304             "restore -r [-dNuvy]", common,
 305             "restore -t [-dhNuvy]", common, fileell,
 306             "restore -x [-dhmNuvy]", common, fileell);
 307         done(1);
 308 }
 309
 310 /*
 311  * obsolete --
 312  *      Change set of key letters and ordered arguments into something
 313  *      getopt(3) will like.
 314  */
 315 static void
 316 obsolete(int *argcp, char **argvp[])
 317 {
 318         int argc, flags;
 319         char *ap, **argv, *flagsp, **nargv, *p;
 320
 321         /* Setup. */
 322         argv = *argvp;
 323         argc = *argcp;
 324
 325         /* Return if no arguments or first argument has leading dash. */
 326         ap = argv[1];
 327         if (argc == 1 || *ap == '-')
 328                 return;
 329
 330         /* Allocate space for new arguments. */
 331         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 332             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 333                 err(1, NULL);
 334
 335         *nargv++ = *argv;
 336         argv += 2, argc -= 2;
 337
 338         for (flags = 0; *ap; ++ap) {
 339                 switch (*ap) {
 340                 case 'b':
 341                 case 'f':
 342                 case 's':
 343                         if (*argv == NULL) {
 344                                 warnx("option requires an argument -- %c", *ap);
 345                                 usage();
 346                         }
 347                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 348                                 err(1, NULL);
 349                         nargv[0][0] = '-';
 350                         nargv[0][1] = *ap;
 351                         (void)strcpy(&nargv[0][2], *argv);
 352                         ++argv;
 353                         ++nargv;
 354                         break;
 355                 default:
 356                         if (!flags) {
 357                                 *p++ = '-';
 358                                 flags = 1;
 359                         }
 360                         *p++ = *ap;
 361                         break;
 362                 }
 363         }
 364
 365         /* Terminate flags. */
 366         if (flags) {
 367                 *p = '\0';
 368                 *nargv++ = flagsp;
 369         }
 370
 371         /* Copy remaining arguments. */
 372         while ((*nargv++ = *argv++));
 373
 374         /* Update argument count. */
 375         *argcp = nargv - *argvp - 1;
 376 }