db/init.c

   1 /*
   2  * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <xfs/libxfs.h>
  20 #include <signal.h>
  21 #include "command.h"
  22 #include "init.h"
  23 #include "input.h"
  24 #include "io.h"
  25 #include "init.h"
  26 #include "sig.h"
  27 #include "output.h"
  28 #include "malloc.h"
  29
  30 static char     **cmdline;
  31 static int      ncmdline;
  32 char            *fsdevice;
  33 int             blkbb;
  34 int             exitcode;
  35 int             expert_mode;
  36 xfs_mount_t     xmount;
  37 xfs_mount_t     *mp;
  38 libxfs_init_t   x;
  39 xfs_agnumber_t  cur_agno = NULLAGNUMBER;
  40
  41 static void
  42 usage(void)
  43 {
  44         fprintf(stderr, _(
  45                 "Usage: %s [-frxV] [-p prog] [-l logdev] [-c cmd]... device\n"),
  46                 progname);
  47         exit(1);
  48 }
  49
  50 void
  51 init(
  52         int             argc,
  53         char            **argv)
  54 {
  55         xfs_sb_t        *sbp;
  56         void            *bufp = NULL;
  57         int             c;
  58
  59         progname = basename(argv[0]);
  60         while ((c = getopt(argc, argv, "c:fip:rxVl:")) != EOF) {
  61                 switch (c) {
  62                 case 'c':
  63                         cmdline = xrealloc(cmdline, (ncmdline+1)*sizeof(char*));
  64                         cmdline[ncmdline++] = optarg;
  65                         break;
  66                 case 'f':
  67                         x.disfile = 1;
  68                         break;
  69                 case 'i':
  70                         x.isreadonly = (LIBXFS_ISREADONLY|LIBXFS_ISINACTIVE);
  71                         break;
  72                 case 'p':
  73                         progname = optarg;
  74                         break;
  75                 case 'r':
  76                         x.isreadonly = LIBXFS_ISREADONLY;
  77                         break;
  78                 case 'l':
  79                         x.logname = optarg;
  80                         break;
  81                 case 'x':
  82                         expert_mode = 1;
  83                         break;
  84                 case 'V':
  85                         printf("%s version %s\n", progname, VERSION);
  86                         exit(0);
  87                 case '?':
  88                         usage();
  89                         /*NOTREACHED*/
  90                 }
  91         }
  92         if (optind + 1 != argc) {
  93                 usage();
  94                 /*NOTREACHED*/
  95         }
  96
  97         fsdevice = argv[optind];
  98         if (!x.disfile)
  99                 x.volname = fsdevice;
 100         else
 101                 x.dname = fsdevice;
 102         x.notvolok = 1;
 103
 104         if (!libxfs_init(&x)) {
 105                 fputs(_("\nfatal error -- couldn't initialize XFS library\n"),
 106                         stderr);
 107                 exit(1);
 108         }
 109
 110         if (read_bbs(XFS_SB_DADDR, 1, &bufp, NULL)) {
 111                 dbprintf(_("%s: %s is invalid (cannot read first 512 bytes)\n"),
 112                         progname, fsdevice);
 113                 exit(1);
 114         }
 115
 116         /* copy SB from buffer to in-core, converting architecture as we go */
 117         libxfs_xlate_sb(bufp, &xmount.m_sb, 1, XFS_SB_ALL_BITS);
 118         xfree(bufp);
 119
 120         sbp = &xmount.m_sb;
 121         if (sbp->sb_magicnum != XFS_SB_MAGIC) {
 122                 dbprintf(_("%s: unexpected XFS SB magic number 0x%08x\n"),
 123                         progname, sbp->sb_magicnum);
 124         }
 125
 126         mp = libxfs_mount(&xmount, sbp, x.ddev, x.logdev, x.rtdev,
 127                                 LIBXFS_MOUNT_ROOTINOS | LIBXFS_MOUNT_DEBUGGER);
 128         if (!mp) {
 129                 dbprintf(_("%s: device %s unusable (not an XFS filesystem?)\n"),
 130                         progname, fsdevice);
 131                 exit(1);
 132         }
 133         blkbb = 1 << mp->m_blkbb_log;
 134
 135         push_cur();
 136         init_commands();
 137         init_sig();
 138 }
 139
 140 int
 141 main(
 142         int     argc,
 143         char    **argv)
 144 {
 145         int     c, i, done = 0;
 146         char    *input;
 147         char    **v;
 148
 149         pushfile(stdin);
 150         init(argc, argv);
 151
 152         for (i = 0; !done && i < ncmdline; i++) {
 153                 v = breakline(cmdline[i], &c);
 154                 if (c)
 155                         done = command(c, v);
 156                 xfree(v);
 157         }
 158         if (cmdline) {
 159                 xfree(cmdline);
 160                 return exitcode;
 161         }
 162
 163         while (!done) {
 164                 if ((input = fetchline()) == NULL)
 165                         break;
 166                 v = breakline(input, &c);
 167                 if (c)
 168                         done = command(c, v);
 169                 doneline(input, v);
 170         }
 171         return exitcode;
 172 }