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