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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1983, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)main.c   8.6 (Berkeley) 5/4/95
  35  * $FreeBSD: src/sbin/restore/main.c,v 1.10.2.3 2001/10/02 08:30:17 cjc Exp $
  36  * $DragonFly: src/sbin/restore/main.c,v 1.8 2005/11/06 12:49:25 swildner Exp $
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/stat.h>
  41
  42 #include <vfs/ufs/dinode.h>
  43 #include <protocols/dumprestore.h>
  44
  45 #include <err.h>
  46 #include <paths.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51
  52 #include "restore.h"
  53 #include "extern.h"
  54
  55 int     bflag = 0, cvtflag = 0, dflag = 0, vflag = 0, yflag = 0;
  56 int     hflag = 1, mflag = 1, Nflag = 0;
  57 int     uflag = 0;
  58 int     dokerberos = 0;
  59 char    command = '\0';
  60 long    dumpnum = 1;
  61 long    volno = 0;
  62 long    ntrec;
  63 char    *dumpmap;
  64 char    *usedinomap;
  65 ufs1_ino_t maxino;
  66 time_t  dumptime;
  67 time_t  dumpdate;
  68 FILE    *terminal;
  69
  70 static void obsolete(int *, char **[]);
  71 static void usage(void);
  72
  73 int
  74 main(int argc, char **argv)
  75 {
  76         int ch;
  77         ufs1_ino_t ino;
  78         char *inputdev;
  79         char *symtbl = "./restoresymtable";
  80         char *p, name[MAXPATHLEN];
  81
  82         /* Temp files should *not* be readable.  We set permissions later. */
  83         umask(077);
  84
  85         if (argc < 2)
  86                 usage();
  87
  88         if ((inputdev = getenv("TAPE")) == NULL)
  89                 inputdev = _PATH_DEFTAPE;
  90         obsolete(&argc, &argv);
  91 #ifdef KERBEROS
  92 #define optlist "b:cdf:hikmNRrs:tuvxy"
  93 #else
  94 #define optlist "b:cdf:himNRrs:tuvxy"
  95 #endif
  96         while ((ch = getopt(argc, argv, optlist)) != -1)
  97                 switch(ch) {
  98                 case 'b':
  99                         /* Change default tape blocksize. */
 100                         bflag = 1;
 101                         ntrec = strtol(optarg, &p, 10);
 102                         if (*p)
 103                                 errx(1, "illegal blocksize -- %s", optarg);
 104                         if (ntrec <= 0)
 105                                 errx(1, "block size must be greater than 0");
 106                         break;
 107                 case 'c':
 108                         cvtflag = 1;
 109                         break;
 110                 case 'd':
 111                         dflag = 1;
 112                         break;
 113                 case 'f':
 114                         inputdev = optarg;
 115                         break;
 116                 case 'h':
 117                         hflag = 0;
 118                         break;
 119 #ifdef KERBEROS
 120                 case 'k':
 121                         dokerberos = 1;
 122                         break;
 123 #endif
 124                 case 'i':
 125                 case 'R':
 126                 case 'r':
 127                 case 't':
 128                 case 'x':
 129                         if (command != '\0')
 130                                 errx(1,
 131                                     "%c and %c options are mutually exclusive",
 132                                     ch, command);
 133                         command = ch;
 134                         break;
 135                 case 'm':
 136                         mflag = 0;
 137                         break;
 138                 case 'N':
 139                         Nflag = 1;
 140                         break;
 141                 case 's':
 142                         /* Dumpnum (skip to) for multifile dump tapes. */
 143                         dumpnum = strtol(optarg, &p, 10);
 144                         if (*p)
 145                                 errx(1, "illegal dump number -- %s", optarg);
 146                         if (dumpnum <= 0)
 147                                 errx(1, "dump number must be greater than 0");
 148                         break;
 149                 case 'u':
 150                         uflag = 1;
 151                         break;
 152                 case 'v':
 153                         vflag = 1;
 154                         break;
 155                 case 'y':
 156                         yflag = 1;
 157                         break;
 158                 default:
 159                         usage();
 160                 }
 161         argc -= optind;
 162         argv += optind;
 163
 164         if (command == '\0')
 165                 errx(1, "none of i, R, r, t or x options specified");
 166
 167         if (signal(SIGINT, onintr) == SIG_IGN)
 168                 signal(SIGINT, SIG_IGN);
 169         if (signal(SIGTERM, onintr) == SIG_IGN)
 170                 signal(SIGTERM, SIG_IGN);
 171         setlinebuf(stderr);
 172
 173         setinput(inputdev);
 174
 175         if (argc == 0) {
 176                 argc = 1;
 177                 *--argv = ".";
 178         }
 179
 180         switch (command) {
 181         /*
 182          * Interactive mode.
 183          */
 184         case 'i':
 185                 setup();
 186                 extractdirs(1);
 187                 initsymtable(NULL);
 188                 runcmdshell();
 189                 break;
 190         /*
 191          * Incremental restoration of a file system.
 192          */
 193         case 'r':
 194                 setup();
 195                 if (dumptime > 0) {
 196                         /*
 197                          * This is an incremental dump tape.
 198                          */
 199                         vprintf(stdout, "Begin incremental restore\n");
 200                         initsymtable(symtbl);
 201                         extractdirs(1);
 202                         removeoldleaves();
 203                         vprintf(stdout, "Calculate node updates.\n");
 204                         treescan(".", ROOTINO, nodeupdates);
 205                         findunreflinks();
 206                         removeoldnodes();
 207                 } else {
 208                         /*
 209                          * This is a level zero dump tape.
 210                          */
 211                         vprintf(stdout, "Begin level 0 restore\n");
 212                         initsymtable(NULL);
 213                         extractdirs(1);
 214                         vprintf(stdout, "Calculate extraction list.\n");
 215                         treescan(".", ROOTINO, nodeupdates);
 216                 }
 217                 createleaves(symtbl);
 218                 createlinks();
 219                 setdirmodes(FORCE);
 220                 checkrestore();
 221                 if (dflag) {
 222                         vprintf(stdout, "Verify the directory structure\n");
 223                         treescan(".", ROOTINO, verifyfile);
 224                 }
 225                 dumpsymtable(symtbl, (long)1);
 226                 break;
 227         /*
 228          * Resume an incremental file system restoration.
 229          */
 230         case 'R':
 231                 initsymtable(symtbl);
 232                 skipmaps();
 233                 skipdirs();
 234                 createleaves(symtbl);
 235                 createlinks();
 236                 setdirmodes(FORCE);
 237                 checkrestore();
 238                 dumpsymtable(symtbl, (long)1);
 239                 break;
 240         /*
 241          * List contents of tape.
 242          */
 243         case 't':
 244                 setup();
 245                 extractdirs(0);
 246                 initsymtable(NULL);
 247                 while (argc--) {
 248                         canon(*argv++, name, sizeof(name));
 249                         ino = dirlookup(name);
 250                         if (ino == 0)
 251                                 continue;
 252                         treescan(name, ino, listfile);
 253                 }
 254                 break;
 255         /*
 256          * Batch extraction of tape contents.
 257          */
 258         case 'x':
 259                 setup();
 260                 extractdirs(1);
 261                 initsymtable(NULL);
 262                 while (argc--) {
 263                         canon(*argv++, name, sizeof(name));
 264                         ino = dirlookup(name);
 265                         if (ino == 0)
 266                                 continue;
 267                         if (mflag)
 268                                 pathcheck(name);
 269                         treescan(name, ino, addfile);
 270                 }
 271                 createfiles();
 272                 createlinks();
 273                 setdirmodes(0);
 274                 if (dflag)
 275                         checkrestore();
 276                 break;
 277         }
 278         done(0);
 279         /* NOTREACHED */
 280 }
 281
 282 static void
 283 usage(void)
 284 {
 285         fprintf(stderr, "usage:\t%s\n\t%s\n\t%s\n\t%s\n\t%s\n",
 286           "restore -i [-cdhkmNuvy] [-b blocksize] [-f file] [-s fileno]",
 287           "restore -r [-cdkNuvy] [-b blocksize] [-f file] [-s fileno]",
 288           "restore -R [-cdkNuvy] [-b blocksize] [-f file] [-s fileno]",
 289           "restore -x [-cdhkmNuvy] [-b blocksize] [-f file] [-s fileno] [file ...]",
 290           "restore -t [-cdhkNuvy] [-b blocksize] [-f file] [-s fileno] [file ...]");
 291         done(1);
 292 }
 293
 294 /*
 295  * obsolete --
 296  *      Change set of key letters and ordered arguments into something
 297  *      getopt(3) will like.
 298  */
 299 static void
 300 obsolete(int *argcp, char **argvp[])
 301 {
 302         int argc, flags;
 303         char *ap, **argv, *flagsp, **nargv, *p;
 304
 305         /* Setup. */
 306         argv = *argvp;
 307         argc = *argcp;
 308
 309         /* Return if no arguments or first argument has leading dash. */
 310         ap = argv[1];
 311         if (argc == 1 || *ap == '-')
 312                 return;
 313
 314         /* Allocate space for new arguments. */
 315         if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
 316             (p = flagsp = malloc(strlen(ap) + 2)) == NULL)
 317                 err(1, NULL);
 318
 319         *nargv++ = *argv;
 320         argv += 2, argc -= 2;
 321
 322         for (flags = 0; *ap; ++ap) {
 323                 switch (*ap) {
 324                 case 'b':
 325                 case 'f':
 326                 case 's':
 327                         if (*argv == NULL) {
 328                                 warnx("option requires an argument -- %c", *ap);
 329                                 usage();
 330                         }
 331                         if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
 332                                 err(1, NULL);
 333                         nargv[0][0] = '-';
 334                         nargv[0][1] = *ap;
 335                         strcpy(&nargv[0][2], *argv);
 336                         ++argv;
 337                         ++nargv;
 338                         break;
 339                 default:
 340                         if (!flags) {
 341                                 *p++ = '-';
 342                                 flags = 1;
 343                         }
 344                         *p++ = *ap;
 345                         break;
 346                 }
 347         }
 348
 349         /* Terminate flags. */
 350         if (flags) {
 351                 *p = '\0';
 352                 *nargv++ = flagsp;
 353         }
 354
 355         /* Copy remaining arguments. */
 356         while ((*nargv++ = *argv++));
 357
 358         /* Update argument count. */
 359         *argcp = nargv - *argvp - 1;
 360 }