db/addr.c

   1 /*
   2  * Copyright (c) 2000-2001,2005 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 "addr.h"
  21 #include "command.h"
  22 #include "type.h"
  23 #include "faddr.h"
  24 #include "fprint.h"
  25 #include "field.h"
  26 #include "io.h"
  27 #include "flist.h"
  28 #include "inode.h"
  29 #include "output.h"
  30
  31 static int addr_f(int argc, char **argv);
  32 static void addr_help(void);
  33
  34 static const cmdinfo_t addr_cmd =
  35         { "addr", "a", addr_f, 0, 1, 1, N_("[field-expression]"),
  36           N_("set current address"), addr_help };
  37
  38 static void
  39 addr_help(void)
  40 {
  41         dbprintf(_(
  42 "\n"
  43 " 'addr' uses the given field to set the filesystem address and type\n"
  44 "\n"
  45 " Examples:\n"
  46 "\n"
  47 " sb\n"
  48 " a rootino - set the type to inode and set position to the root inode\n"
  49 " a u.bmx[0].startblock (for inode with blockmap)\n"
  50 "\n"
  51 ));
  52
  53 }
  54
  55 static int
  56 addr_f(
  57         int             argc,
  58         char            **argv)
  59 {
  60         adfnc_t         adf;
  61         const ftattr_t  *fa;
  62         flist_t         *fl;
  63         const field_t   *fld;
  64         typnm_t         next;
  65         flist_t         *tfl;
  66
  67         if (argc == 1) {
  68                 print_iocur("current", iocur_top);
  69                 return 0;
  70         }
  71         if (cur_typ == NULL) {
  72                 dbprintf(_("no current type\n"));
  73                 return 0;
  74         }
  75         fld = cur_typ->fields;
  76         if (fld != NULL && fld->name[0] == '\0') {
  77                 fa = &ftattrtab[fld->ftyp];
  78                 ASSERT(fa->ftyp == fld->ftyp);
  79                 fld = fa->subfld;
  80         }
  81         if (fld == NULL) {
  82                 dbprintf(_("no fields for type %s\n"), cur_typ->name);
  83                 return 0;
  84         }
  85         fl = flist_scan(argv[1]);
  86         if (fl == NULL)
  87                 return 0;
  88         if (!flist_parse(fld, fl, iocur_top->data, 0)) {
  89                 flist_free(fl);
  90                 return 0;
  91         }
  92         flist_print(fl);
  93         for (tfl = fl; tfl->child != NULL; tfl = tfl->child) {
  94                 if ((tfl->flags & FL_OKLOW) && tfl->low < tfl->high) {
  95                         dbprintf(_("array not allowed for addr command\n"));
  96                         flist_free(fl);
  97                         return 0;
  98                 }
  99         }
 100         fld = tfl->fld;
 101         next = fld->next;
 102         if (next == TYP_INODATA)
 103                 next = inode_next_type();
 104         if (next == TYP_NONE) {
 105                 dbprintf(_("no next type for field %s\n"), fld->name);
 106                 return 0;
 107         }
 108         fa = &ftattrtab[fld->ftyp];
 109         ASSERT(fa->ftyp == fld->ftyp);
 110         adf = fa->adfunc;
 111         if (adf == NULL) {
 112                 dbprintf(_("no addr function for field %s (type %s)\n"),
 113                         fld->name, fa->name);
 114                 return 0;
 115         }
 116         (*adf)(iocur_top->data, tfl->offset, next);
 117         flist_free(fl);
 118         return 0;
 119 }
 120
 121 void
 122 addr_init(void)
 123 {
 124         add_command(&addr_cmd);
 125 }