Logo Search packages:      
Sourcecode: e2fsprogs version File versions

debugfs.c

/*
 * debugfs.c --- a program which allows you to attach an ext2fs
 * filesystem and play with it.
 *
 * Copyright (C) 1993 Theodore Ts'o.  This file may be redistributed
 * under the terms of the GNU Public License.
 * 
 * Modifications by Robert Sanders <gt8134b@prism.gatech.edu>
 */

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <time.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else 
extern int optind;
extern char *optarg;
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "et/com_err.h"
#include "ss/ss.h"
#include "debugfs.h"
#include "uuid/uuid.h"
#include "e2p/e2p.h"

#include <ext2fs/ext2_ext_attr.h>

#include "../version.h"

extern ss_request_table debug_cmds;

ext2_filsys current_fs = NULL;
ext2_ino_t  root, cwd;

static void open_filesystem(char *device, int open_flags, blk_t superblock,
                      blk_t blocksize, int catastrophic, 
                      char *data_filename)
{
      int   retval;
      io_channel data_io = 0;

      if (superblock != 0 && blocksize == 0) {
            com_err(device, 0, "if you specify the superblock, you must also specify the block size");
            current_fs = NULL;
            return;
      }

      if (data_filename) {
            if ((open_flags & EXT2_FLAG_IMAGE_FILE) == 0) {
                  com_err(device, 0, 
                        "The -d option is only valid when reading an e2image file");
                  current_fs = NULL;
                  return;
            }
            retval = unix_io_manager->open(data_filename, 0, &data_io);
            if (retval) {
                  com_err(data_filename, 0, "while opening data source");
                  current_fs = NULL;
                  return;
            }
      }

      if (catastrophic && (open_flags & EXT2_FLAG_RW)) {
            com_err(device, 0,
                  "opening read-only because of catastrophic mode");
            open_flags &= ~EXT2_FLAG_RW;
      }
      
      retval = ext2fs_open(device, open_flags, superblock, blocksize,
                       unix_io_manager, &current_fs);
      if (retval) {
            com_err(device, retval, "while opening filesystem");
            current_fs = NULL;
            return;
      }

      if (catastrophic)
            com_err(device, 0, "catastrophic mode - not reading inode or group bitmaps");
      else {
            retval = ext2fs_read_inode_bitmap(current_fs);
            if (retval) {
                  com_err(device, retval, "while reading inode bitmap");
                  goto errout;
            }
            retval = ext2fs_read_block_bitmap(current_fs);
            if (retval) {
                  com_err(device, retval, "while reading block bitmap");
                  goto errout;
            }
      }

      if (data_io) {
            retval = ext2fs_set_data_io(current_fs, data_io);
            if (retval) {
                  com_err(device, retval, 
                        "while setting data source");
                  goto errout;
            }
      }

      root = cwd = EXT2_ROOT_INO;
      return;

errout:
      retval = ext2fs_close(current_fs);
      if (retval)
            com_err(device, retval, "while trying to close filesystem");
      current_fs = NULL;
}

void do_open_filesys(int argc, char **argv)
{
      const char *usage = "Usage: open [-s superblock] [-b blocksize] [-c] [-w] <device>";
      int   c, err;
      int   catastrophic = 0;
      blk_t superblock = 0;
      blk_t blocksize = 0;
      int   open_flags = 0;
      char  *data_filename = 0;
      
      reset_getopt();
      while ((c = getopt (argc, argv, "iwfcb:s:d:")) != EOF) {
            switch (c) {
            case 'i':
                  open_flags |= EXT2_FLAG_IMAGE_FILE;
                  break;
            case 'w':
                  open_flags |= EXT2_FLAG_RW;
                  break;
            case 'f':
                  open_flags |= EXT2_FLAG_FORCE;
                  break;
            case 'c':
                  catastrophic = 1;
                  break;
            case 'd':
                  data_filename = optarg;
                  break;
            case 'b':
                  blocksize = parse_ulong(optarg, argv[0],
                                    "block size", &err);
                  if (err)
                        return;
                  break;
            case 's':
                  superblock = parse_ulong(optarg, argv[0],
                                     "superblock number", &err);
                  if (err)
                        return;
                  break;
            default:
                  com_err(argv[0], 0, usage);
                  return;
            }
      }
      if (optind != argc-1) {
            com_err(argv[0], 0, usage);
            return;
      }
      if (check_fs_not_open(argv[0]))
            return;
      open_filesystem(argv[optind], open_flags,
                  superblock, blocksize, catastrophic, 
                  data_filename);
}

void do_lcd(int argc, char **argv)
{
      if (common_args_process(argc, argv, 2, 2, "lcd",
                        "<native dir>", 0))
            return;

      if (chdir(argv[1]) == -1) {
            com_err(argv[0], errno,
                  "while trying to change native directory to %s",
                  argv[1]);
            return;
      }
}

static void close_filesystem(NOARGS)
{
      int   retval;
      
      if (current_fs->flags & EXT2_FLAG_IB_DIRTY) {
            retval = ext2fs_write_inode_bitmap(current_fs);
            if (retval)
                  com_err("ext2fs_write_inode_bitmap", retval, "");
      }
      if (current_fs->flags & EXT2_FLAG_BB_DIRTY) {
            retval = ext2fs_write_block_bitmap(current_fs);
            if (retval)
                  com_err("ext2fs_write_block_bitmap", retval, "");
      }
      retval = ext2fs_close(current_fs);
      if (retval)
            com_err("ext2fs_close", retval, "");
      current_fs = NULL;
      return;
}

void do_close_filesys(int argc, char **argv)
{
      if (common_args_process(argc, argv, 1, 1, "close_filesys", "", 0))
            return;
      close_filesystem();
}

void do_init_filesys(int argc, char **argv)
{
      struct ext2_super_block param;
      errcode_t   retval;
      int         err;
      
      if (common_args_process(argc, argv, 3, 3, "initialize",
                        "<device> <blocksize>", CHECK_FS_NOTOPEN))
            return;

      memset(&param, 0, sizeof(struct ext2_super_block));
      param.s_blocks_count = parse_ulong(argv[2], argv[0],
                                 "blocks count", &err);
      if (err)
            return;
      retval = ext2fs_initialize(argv[1], 0, &param,
                           unix_io_manager, &current_fs);
      if (retval) {
            com_err(argv[1], retval, "while initializing filesystem");
            current_fs = NULL;
            return;
      }
      root = cwd = EXT2_ROOT_INO;
      return;
}

static void print_features(struct ext2_super_block * s, FILE *f)
{
      int   i, j, printed=0;
      __u32 *mask = &s->s_feature_compat, m;

      fputs("Filesystem features:", f);
      for (i=0; i <3; i++,mask++) {
            for (j=0,m=1; j < 32; j++, m<<=1) {
                  if (*mask & m) {
                        fprintf(f, " %s", e2p_feature2string(i, m));
                        printed++;
                  }
            }
      }
      if (printed == 0)
            fputs("(none)", f);
      fputs("\n", f);
}

void do_show_super_stats(int argc, char *argv[])
{
      dgrp_t      i;
      FILE  *out;
      struct ext2_group_desc *gdp;
      int   c, header_only = 0;
      int   numdirs = 0;
      const char *usage = "Usage: show_super [-h]";

      reset_getopt();
      while ((c = getopt (argc, argv, "h")) != EOF) {
            switch (c) {
            case 'h':
                  header_only++;
                  break;
            default:
                  com_err(argv[0], 0, usage);
                  return;
            }
      }
      if (optind != argc) {
            com_err(argv[0], 0, usage);
            return;
      }
      if (check_fs_open(argv[0]))
            return;
      out = open_pager();

      list_super2(current_fs->super, out);
      for (i=0; i < current_fs->group_desc_count; i++)
            numdirs += current_fs->group_desc[i].bg_used_dirs_count;
      fprintf(out, "Directories:              %d\n", numdirs);
      
      if (header_only) {
            close_pager(out);
            return;
      }
      
      gdp = &current_fs->group_desc[0];
      for (i = 0; i < current_fs->group_desc_count; i++, gdp++)
            fprintf(out, " Group %2d: block bitmap at %d, "
                    "inode bitmap at %d, "
                    "inode table at %d\n"
                    "           %d free %s, "
                    "%d free %s, "
                    "%d used %s\n",
                    i, gdp->bg_block_bitmap,
                    gdp->bg_inode_bitmap, gdp->bg_inode_table,
                    gdp->bg_free_blocks_count,
                    gdp->bg_free_blocks_count != 1 ? "blocks" : "block",
                    gdp->bg_free_inodes_count,
                    gdp->bg_free_inodes_count != 1 ? "inodes" : "inode",
                    gdp->bg_used_dirs_count,
                    gdp->bg_used_dirs_count != 1 ? "directories"
                        : "directory");
      close_pager(out);
}

void do_dirty_filesys(int argc EXT2FS_ATTR((unused)), 
                  char **argv EXT2FS_ATTR((unused)))
{
      if (check_fs_open(argv[0]))
            return;
      if (check_fs_read_write(argv[0]))
            return;

      if (argv[1] && !strcmp(argv[1], "-clean"))
            current_fs->super->s_state |= EXT2_VALID_FS;
      else
            current_fs->super->s_state &= ~EXT2_VALID_FS;
      ext2fs_mark_super_dirty(current_fs);
}

struct list_blocks_struct {
      FILE        *f;
      e2_blkcnt_t total;
      blk_t       first_block, last_block;
      e2_blkcnt_t first_bcnt, last_bcnt;
      e2_blkcnt_t first;
};

static void finish_range(struct list_blocks_struct *lb)
{
      if (lb->first_block == 0)
            return;
      if (lb->first)
            lb->first = 0;
      else
            fprintf(lb->f, ", ");
      if (lb->first_block == lb->last_block)
            fprintf(lb->f, "(%lld):%d", lb->first_bcnt, lb->first_block);
      else
            fprintf(lb->f, "(%lld-%lld):%d-%d", lb->first_bcnt,
                  lb->last_bcnt, lb->first_block, lb->last_block);
      lb->first_block = 0;
}

static int list_blocks_proc(ext2_filsys fs EXT2FS_ATTR((unused)), 
                      blk_t *blocknr, e2_blkcnt_t blockcnt, 
                      blk_t ref_block EXT2FS_ATTR((unused)),
                      int ref_offset EXT2FS_ATTR((unused)), 
                      void *private)
{
      struct list_blocks_struct *lb = (struct list_blocks_struct *) private;

      lb->total++;
      if (blockcnt >= 0) {
            /*
             * See if we can add on to the existing range (if it exists)
             */
            if (lb->first_block &&
                (lb->last_block+1 == *blocknr) &&
                (lb->last_bcnt+1 == blockcnt)) {
                  lb->last_block = *blocknr;
                  lb->last_bcnt = blockcnt;
                  return 0;
            }
            /*
             * Start a new range.
             */
            finish_range(lb);
            lb->first_block = lb->last_block = *blocknr;
            lb->first_bcnt = lb->last_bcnt = blockcnt;
            return 0;
      }
      /*
       * Not a normal block.  Always force a new range.
       */
      finish_range(lb);
      if (lb->first)
            lb->first = 0;
      else
            fprintf(lb->f, ", ");
      if (blockcnt == -1)
            fprintf(lb->f, "(IND):%d", *blocknr);
      else if (blockcnt == -2)
            fprintf(lb->f, "(DIND):%d", *blocknr);
      else if (blockcnt == -3)
            fprintf(lb->f, "(TIND):%d", *blocknr);
      return 0;
}

void dump_xattr_string(FILE *out, const unsigned char *str, int len)
{
      int printable = 1;
      int i;
      
      /* check is string printable? */
      for (i = 0; i < len; i++)
            if (!isprint(str[i])) {
                  printable = 0;
                  break;
            }

      for (i = 0; i < len; i++)
            if (printable)
                  fprintf(out, "%c", str[i]);
            else
                  fprintf(out, "%02x ", str[i]);
}

void internal_dump_inode_extra(FILE *out, const char *prefix,
                   ext2_ino_t inode_num, struct ext2_inode_large *inode)
{
      struct ext2_ext_attr_entry *entry;
      __u32 *magic;
      char *start, *end;
      int storage_size;
      int i;

      fprintf(out, "Size of extra inode fields: %d\n", inode->i_extra_isize);
      if (inode->i_extra_isize > EXT2_INODE_SIZE(current_fs->super) -
                  EXT2_GOOD_OLD_INODE_SIZE) {
            fprintf(stderr, "invalid inode->i_extra_isize (%u)\n",
                        inode->i_extra_isize);
            return;
      }
      storage_size = EXT2_INODE_SIZE(current_fs->super) -
                  EXT2_GOOD_OLD_INODE_SIZE -
                  inode->i_extra_isize;
      magic = (__u32 *)((char *)inode + EXT2_GOOD_OLD_INODE_SIZE +
                  inode->i_extra_isize);
      if (*magic == EXT2_EXT_ATTR_MAGIC) {
            fprintf(out, "Extended attributes stored in inode body: \n");
            end = (char *) inode + EXT2_INODE_SIZE(current_fs->super);
            start = (char *) magic + sizeof(__u32);
            entry = (struct ext2_ext_attr_entry *) start;
            while (!EXT2_EXT_IS_LAST_ENTRY(entry)) {
                  struct ext2_ext_attr_entry *next =
                        EXT2_EXT_ATTR_NEXT(entry);
                  if (entry->e_value_size > storage_size ||
                              (char *) next >= end) {
                        fprintf(out, "invalid EA entry in inode\n");
                        return;
                  }
                  fprintf(out, "  ");
                  dump_xattr_string(out, EXT2_EXT_ATTR_NAME(entry), 
                                entry->e_name_len);
                  fprintf(out, " = \"");
                  dump_xattr_string(out, start + entry->e_value_offs,
                                    entry->e_value_size);
                  fprintf(out, "\" (%d)\n", entry->e_value_size);
                  entry = next;
            }
      }
}

static void dump_blocks(FILE *f, const char *prefix, ext2_ino_t inode)
{
      struct list_blocks_struct lb;

      fprintf(f, "%sBLOCKS:\n%s", prefix, prefix);
      lb.total = 0;
      lb.first_block = 0;
      lb.f = f;
      lb.first = 1;
      ext2fs_block_iterate2(current_fs, inode, 0, NULL,
                       list_blocks_proc, (void *)&lb);
      finish_range(&lb);
      if (lb.total)
            fprintf(f, "\n%sTOTAL: %lld\n", prefix, lb.total);
      fprintf(f,"\n");
}


void internal_dump_inode(FILE *out, const char *prefix,
                   ext2_ino_t inode_num, struct ext2_inode *inode,
                   int do_dump_blocks)
{
      const char *i_type;
      char frag, fsize;
      int os = current_fs->super->s_creator_os;
      
      if (LINUX_S_ISDIR(inode->i_mode)) i_type = "directory";
      else if (LINUX_S_ISREG(inode->i_mode)) i_type = "regular";
      else if (LINUX_S_ISLNK(inode->i_mode)) i_type = "symlink";
      else if (LINUX_S_ISBLK(inode->i_mode)) i_type = "block special";
      else if (LINUX_S_ISCHR(inode->i_mode)) i_type = "character special";
      else if (LINUX_S_ISFIFO(inode->i_mode)) i_type = "FIFO";
      else if (LINUX_S_ISSOCK(inode->i_mode)) i_type = "socket";
      else i_type = "bad type";
      fprintf(out, "%sInode: %u   Type: %s    ", prefix, inode_num, i_type);
      fprintf(out, "%sMode:  %04o   Flags: 0x%x   Generation: %u\n",
            prefix, 
            inode->i_mode & 0777, inode->i_flags, inode->i_generation);
      fprintf(out, "%sUser: %5d   Group: %5d   Size: ",
            prefix, inode->i_uid, inode->i_gid);
      if (LINUX_S_ISREG(inode->i_mode)) {
            __u64 i_size = (inode->i_size |
                        ((unsigned long long)inode->i_size_high << 32));

            fprintf(out, "%lld\n", i_size);
      } else
            fprintf(out, "%d\n", inode->i_size);
      if (current_fs->super->s_creator_os == EXT2_OS_HURD)
            fprintf(out,
                  "%sFile ACL: %d    Directory ACL: %d Translator: %d\n",
                  prefix,
                  inode->i_file_acl, LINUX_S_ISDIR(inode->i_mode) ? inode->i_dir_acl : 0,
                  inode->osd1.hurd1.h_i_translator);
      else
            fprintf(out, "%sFile ACL: %d    Directory ACL: %d\n",
                  prefix,
                  inode->i_file_acl, LINUX_S_ISDIR(inode->i_mode) ? inode->i_dir_acl : 0);
      fprintf(out, "%sLinks: %d   Blockcount: %d\n", 
            prefix, inode->i_links_count, inode->i_blocks);
      switch (os) {
          case EXT2_OS_LINUX:
            frag = inode->osd2.linux2.l_i_frag;
            fsize = inode->osd2.linux2.l_i_fsize;
            break;
          case EXT2_OS_HURD:
            frag = inode->osd2.hurd2.h_i_frag;
            fsize = inode->osd2.hurd2.h_i_fsize;
            break;
          case EXT2_OS_MASIX:
            frag = inode->osd2.masix2.m_i_frag;
            fsize = inode->osd2.masix2.m_i_fsize;
            break;
          default:
            frag = fsize = 0;
      }
      fprintf(out, "%sFragment:  Address: %d    Number: %d    Size: %d\n",
            prefix, inode->i_faddr, frag, fsize);
      fprintf(out, "%sctime: 0x%08x -- %s", prefix, inode->i_ctime,
            time_to_string(inode->i_ctime));
      fprintf(out, "%satime: 0x%08x -- %s", prefix, inode->i_atime,
            time_to_string(inode->i_atime));
      fprintf(out, "%smtime: 0x%08x -- %s", prefix, inode->i_mtime,
            time_to_string(inode->i_mtime));
      if (inode->i_dtime) 
        fprintf(out, "%sdtime: 0x%08x -- %s", prefix, inode->i_dtime,
              time_to_string(inode->i_dtime));
      if (EXT2_INODE_SIZE(current_fs->super) > EXT2_GOOD_OLD_INODE_SIZE)
            internal_dump_inode_extra(out, prefix, inode_num,
                                (struct ext2_inode_large *) inode);
      if (LINUX_S_ISLNK(inode->i_mode) && ext2fs_inode_data_blocks(current_fs,inode) == 0)
            fprintf(out, "%sFast_link_dest: %.*s\n", prefix,
                  (int) inode->i_size, (char *)inode->i_block);
      else if (LINUX_S_ISBLK(inode->i_mode) || LINUX_S_ISCHR(inode->i_mode)) {
            int major, minor;
            const char *devnote;

            if (inode->i_block[0]) {
                  major = (inode->i_block[0] >> 8) & 255;
                  minor = inode->i_block[0] & 255;
                  devnote = "";
            } else {
                  major = (inode->i_block[1] & 0xfff00) >> 8;
                  minor = ((inode->i_block[1] & 0xff) | 
                         ((inode->i_block[1] >> 12) & 0xfff00));
                  devnote = "(New-style) ";
            }
            fprintf(out, "%sDevice major/minor number: %02d:%02d (hex %02x:%02x)\n", 
                  devnote, major, minor, major, minor);
      }
      else if (do_dump_blocks)
            dump_blocks(out, prefix, inode_num);
}

static void dump_inode(ext2_ino_t inode_num, struct ext2_inode *inode)
{
      FILE  *out;
      
      out = open_pager();
      internal_dump_inode(out, "", inode_num, inode, 1);
      close_pager(out);
}

void do_stat(int argc, char *argv[])
{
      ext2_ino_t  inode;
      struct ext2_inode * inode_buf;

      inode_buf = (struct ext2_inode *)
                  malloc(EXT2_INODE_SIZE(current_fs->super));
      if (!inode_buf) {
            fprintf(stderr, "do_stat: can't allocate buffer\n");
            return;
      }

      if (common_inode_args_process(argc, argv, &inode, 0)) {
            free(inode_buf);
            return;
      }

      if (debugfs_read_inode_full(inode, inode_buf, argv[0],
                              EXT2_INODE_SIZE(current_fs->super))) {
            free(inode_buf);
            return;
      }

      dump_inode(inode, inode_buf);
      free(inode_buf);
      return;
}

void do_chroot(int argc, char *argv[])
{
      ext2_ino_t inode;
      int retval;

      if (common_inode_args_process(argc, argv, &inode, 0))
            return;

      retval = ext2fs_check_directory(current_fs, inode);
      if (retval)  {
            com_err(argv[1], retval, "");
            return;
      }
      root = inode;
}

void do_clri(int argc, char *argv[])
{
      ext2_ino_t inode;
      struct ext2_inode inode_buf;

      if (common_inode_args_process(argc, argv, &inode, CHECK_FS_RW))
            return;

      if (debugfs_read_inode(inode, &inode_buf, argv[0]))
            return;
      memset(&inode_buf, 0, sizeof(inode_buf));
      if (debugfs_write_inode(inode, &inode_buf, argv[0]))
            return;
}

void do_freei(int argc, char *argv[])
{
      ext2_ino_t inode;

      if (common_inode_args_process(argc, argv, &inode,
                              CHECK_FS_RW | CHECK_FS_BITMAPS))
            return;

      if (!ext2fs_test_inode_bitmap(current_fs->inode_map,inode))
            com_err(argv[0], 0, "Warning: inode already clear");
      ext2fs_unmark_inode_bitmap(current_fs->inode_map,inode);
      ext2fs_mark_ib_dirty(current_fs);
}

void do_seti(int argc, char *argv[])
{
      ext2_ino_t inode;

      if (common_inode_args_process(argc, argv, &inode,
                              CHECK_FS_RW | CHECK_FS_BITMAPS))
            return;

      if (ext2fs_test_inode_bitmap(current_fs->inode_map,inode))
            com_err(argv[0], 0, "Warning: inode already set");
      ext2fs_mark_inode_bitmap(current_fs->inode_map,inode);
      ext2fs_mark_ib_dirty(current_fs);
}

void do_testi(int argc, char *argv[])
{
      ext2_ino_t inode;

      if (common_inode_args_process(argc, argv, &inode, CHECK_FS_BITMAPS))
            return;

      if (ext2fs_test_inode_bitmap(current_fs->inode_map,inode))
            printf("Inode %u is marked in use\n", inode);
      else
            printf("Inode %u is not in use\n", inode);
}

void do_freeb(int argc, char *argv[])
{
      blk_t block;
      int count = 1;

      if (common_block_args_process(argc, argv, &block, &count))
            return;
      if (check_fs_read_write(argv[0]))
            return;
      while (count-- > 0) {
            if (!ext2fs_test_block_bitmap(current_fs->block_map,block))
                  com_err(argv[0], 0, "Warning: block %d already clear",
                        block);
            ext2fs_unmark_block_bitmap(current_fs->block_map,block);
            block++;
      }
      ext2fs_mark_bb_dirty(current_fs);
}

void do_setb(int argc, char *argv[])
{
      blk_t block;
      int count = 1;

      if (common_block_args_process(argc, argv, &block, &count))
            return;
      if (check_fs_read_write(argv[0]))
            return;
      while (count-- > 0) {
            if (ext2fs_test_block_bitmap(current_fs->block_map,block))
                  com_err(argv[0], 0, "Warning: block %d already set",
                        block);
            ext2fs_mark_block_bitmap(current_fs->block_map,block);
            block++;
      }
      ext2fs_mark_bb_dirty(current_fs);
}

void do_testb(int argc, char *argv[])
{
      blk_t block;
      int count = 1;

      if (common_block_args_process(argc, argv, &block, &count))
            return;
      while (count-- > 0) {
            if (ext2fs_test_block_bitmap(current_fs->block_map,block))
                  printf("Block %d marked in use\n", block);
            else
                  printf("Block %d not in use\n", block);
            block++;
      }
}

static void modify_u8(char *com, const char *prompt,
                  const char *format, __u8 *val)
{
      char buf[200];
      unsigned long v;
      char *tmp;

      sprintf(buf, format, *val);
      printf("%30s    [%s] ", prompt, buf);
      fgets(buf, sizeof(buf), stdin);
      if (buf[strlen (buf) - 1] == '\n')
            buf[strlen (buf) - 1] = '\0';
      if (!buf[0])
            return;
      v = strtoul(buf, &tmp, 0);
      if (*tmp)
            com_err(com, 0, "Bad value - %s", buf);
      else
            *val = v;
}

static void modify_u16(char *com, const char *prompt,
                   const char *format, __u16 *val)
{
      char buf[200];
      unsigned long v;
      char *tmp;

      sprintf(buf, format, *val);
      printf("%30s    [%s] ", prompt, buf);
      fgets(buf, sizeof(buf), stdin);
      if (buf[strlen (buf) - 1] == '\n')
            buf[strlen (buf) - 1] = '\0';
      if (!buf[0])
            return;
      v = strtoul(buf, &tmp, 0);
      if (*tmp)
            com_err(com, 0, "Bad value - %s", buf);
      else
            *val = v;
}

static void modify_u32(char *com, const char *prompt,
                   const char *format, __u32 *val)
{
      char buf[200];
      unsigned long v;
      char *tmp;

      sprintf(buf, format, *val);
      printf("%30s    [%s] ", prompt, buf);
      fgets(buf, sizeof(buf), stdin);
      if (buf[strlen (buf) - 1] == '\n')
            buf[strlen (buf) - 1] = '\0';
      if (!buf[0])
            return;
      v = strtoul(buf, &tmp, 0);
      if (*tmp)
            com_err(com, 0, "Bad value - %s", buf);
      else
            *val = v;
}


void do_modify_inode(int argc, char *argv[])
{
      struct ext2_inode inode;
      ext2_ino_t  inode_num;
      int         i;
      unsigned char     *frag, *fsize;
      char        buf[80];
      int         os;
      const char  *hex_format = "0x%x";
      const char  *octal_format = "0%o";
      const char  *decimal_format = "%d";
      
      if (common_inode_args_process(argc, argv, &inode_num, CHECK_FS_RW))
            return;

      os = current_fs->super->s_creator_os;

      if (debugfs_read_inode(inode_num, &inode, argv[1]))
            return;
      
      modify_u16(argv[0], "Mode", octal_format, &inode.i_mode);
      modify_u16(argv[0], "User ID", decimal_format, &inode.i_uid);
      modify_u16(argv[0], "Group ID", decimal_format, &inode.i_gid);
      modify_u32(argv[0], "Size", decimal_format, &inode.i_size);
      modify_u32(argv[0], "Creation time", decimal_format, &inode.i_ctime);
      modify_u32(argv[0], "Modification time", decimal_format, &inode.i_mtime);
      modify_u32(argv[0], "Access time", decimal_format, &inode.i_atime);
      modify_u32(argv[0], "Deletion time", decimal_format, &inode.i_dtime);
      modify_u16(argv[0], "Link count", decimal_format, &inode.i_links_count);
      modify_u32(argv[0], "Block count", decimal_format, &inode.i_blocks);
      modify_u32(argv[0], "File flags", hex_format, &inode.i_flags);
      modify_u32(argv[0], "Generation", hex_format, &inode.i_generation);
#if 0
      modify_u32(argv[0], "Reserved1", decimal_format, &inode.i_reserved1);
#endif
      modify_u32(argv[0], "File acl", decimal_format, &inode.i_file_acl);
      if (LINUX_S_ISDIR(inode.i_mode))
            modify_u32(argv[0], "Directory acl", decimal_format, &inode.i_dir_acl);
      else
            modify_u32(argv[0], "High 32bits of size", decimal_format, &inode.i_size_high);

      if (current_fs->super->s_creator_os == EXT2_OS_HURD)
            modify_u32(argv[0], "Translator Block",
                      decimal_format, &inode.osd1.hurd1.h_i_translator);
      
      modify_u32(argv[0], "Fragment address", decimal_format, &inode.i_faddr);
      switch (os) {
          case EXT2_OS_LINUX:
            frag = &inode.osd2.linux2.l_i_frag;
            fsize = &inode.osd2.linux2.l_i_fsize;
            break;
          case EXT2_OS_HURD:
            frag = &inode.osd2.hurd2.h_i_frag;
            fsize = &inode.osd2.hurd2.h_i_fsize;
            break;
          case EXT2_OS_MASIX:
            frag = &inode.osd2.masix2.m_i_frag;
            fsize = &inode.osd2.masix2.m_i_fsize;
            break;
          default:
            frag = fsize = 0;
      }
      if (frag)
            modify_u8(argv[0], "Fragment number", decimal_format, frag);
      if (fsize)
            modify_u8(argv[0], "Fragment size", decimal_format, fsize);

      for (i=0;  i < EXT2_NDIR_BLOCKS; i++) {
            sprintf(buf, "Direct Block #%d", i);
            modify_u32(argv[0], buf, decimal_format, &inode.i_block[i]);
      }
      modify_u32(argv[0], "Indirect Block", decimal_format,
                &inode.i_block[EXT2_IND_BLOCK]);    
      modify_u32(argv[0], "Double Indirect Block", decimal_format,
                &inode.i_block[EXT2_DIND_BLOCK]);
      modify_u32(argv[0], "Triple Indirect Block", decimal_format,
                &inode.i_block[EXT2_TIND_BLOCK]);
      if (debugfs_write_inode(inode_num, &inode, argv[1]))
            return;
}

void do_change_working_dir(int argc, char *argv[])
{
      ext2_ino_t  inode;
      int         retval;
      
      if (common_inode_args_process(argc, argv, &inode, 0))
            return;

      retval = ext2fs_check_directory(current_fs, inode);
      if (retval) {
            com_err(argv[1], retval, "");
            return;
      }
      cwd = inode;
      return;
}

void do_print_working_directory(int argc, char *argv[])
{
      int   retval;
      char  *pathname = NULL;
      
      if (common_args_process(argc, argv, 1, 1,
                        "print_working_directory", "", 0))
            return;

      retval = ext2fs_get_pathname(current_fs, cwd, 0, &pathname);
      if (retval) {
            com_err(argv[0], retval,
                  "while trying to get pathname of cwd");
      }
      printf("[pwd]   INODE: %6u  PATH: %s\n", cwd, pathname);
      free(pathname);
      retval = ext2fs_get_pathname(current_fs, root, 0, &pathname);
      if (retval) {
            com_err(argv[0], retval,
                  "while trying to get pathname of root");
      }
      printf("[root]  INODE: %6u  PATH: %s\n", root, pathname);
      free(pathname);
      return;
}

/*
 * Given a mode, return the ext2 file type
 */
static int ext2_file_type(unsigned int mode)
{
      if (LINUX_S_ISREG(mode))
            return EXT2_FT_REG_FILE;

      if (LINUX_S_ISDIR(mode))
            return EXT2_FT_DIR;
      
      if (LINUX_S_ISCHR(mode))
            return EXT2_FT_CHRDEV;
      
      if (LINUX_S_ISBLK(mode))
            return EXT2_FT_BLKDEV;
      
      if (LINUX_S_ISLNK(mode))
            return EXT2_FT_SYMLINK;

      if (LINUX_S_ISFIFO(mode))
            return EXT2_FT_FIFO;
      
      if (LINUX_S_ISSOCK(mode))
            return EXT2_FT_SOCK;
      
      return 0;
}

static void make_link(char *sourcename, char *destname)
{
      ext2_ino_t  ino;
      struct ext2_inode inode;
      int         retval;
      ext2_ino_t  dir;
      char        *dest, *cp, *basename;

      /*
       * Get the source inode
       */
      ino = string_to_inode(sourcename);
      if (!ino)
            return;
      basename = strrchr(sourcename, '/');
      if (basename)
            basename++;
      else
            basename = sourcename;
      /*
       * Figure out the destination.  First see if it exists and is
       * a directory.  
       */
      if (! (retval=ext2fs_namei(current_fs, root, cwd, destname, &dir)))
            dest = basename;
      else {
            /*
             * OK, it doesn't exist.  See if it is
             * '<dir>/basename' or 'basename'
             */
            cp = strrchr(destname, '/');
            if (cp) {
                  *cp = 0;
                  dir = string_to_inode(destname);
                  if (!dir)
                        return;
                  dest = cp+1;
            } else {
                  dir = cwd;
                  dest = destname;
            }
      }

      if (debugfs_read_inode(ino, &inode, sourcename))
            return;
      
      retval = ext2fs_link(current_fs, dir, dest, ino, 
                       ext2_file_type(inode.i_mode));
      if (retval)
            com_err("make_link", retval, "");
      return;
}


void do_link(int argc, char *argv[])
{
      if (common_args_process(argc, argv, 3, 3, "link",
                        "<source file> <dest_name>", CHECK_FS_RW))
            return;

      make_link(argv[1], argv[2]);
}

static int mark_blocks_proc(ext2_filsys fs, blk_t *blocknr,
                      int blockcnt EXT2FS_ATTR((unused)), 
                      void *private EXT2FS_ATTR((unused)))
{
      blk_t block;

      block = *blocknr;
      ext2fs_block_alloc_stats(fs, block, +1);
      return 0;
}

void do_undel(int argc, char *argv[])
{
      ext2_ino_t  ino;
      struct ext2_inode inode;

      if (common_args_process(argc, argv, 3, 3, "undelete",
                        "<inode_num> <dest_name>",
                        CHECK_FS_RW | CHECK_FS_BITMAPS))
            return;

      ino = string_to_inode(argv[1]);
      if (!ino)
            return;

      if (debugfs_read_inode(ino, &inode, argv[1]))
            return;

      if (ext2fs_test_inode_bitmap(current_fs->inode_map, ino)) {
            com_err(argv[1], 0, "Inode is not marked as deleted");
            return;
      }

      /*
       * XXX this function doesn't handle changing the links count on the
       * parent directory when undeleting a directory.  
       */
      inode.i_links_count = LINUX_S_ISDIR(inode.i_mode) ? 2 : 1;
      inode.i_dtime = 0;

      if (debugfs_write_inode(ino, &inode, argv[0]))
            return;

      ext2fs_block_iterate(current_fs, ino, 0, NULL,
                       mark_blocks_proc, NULL);

      ext2fs_inode_alloc_stats2(current_fs, ino, +1, 0);

      make_link(argv[1], argv[2]);
}

static void unlink_file_by_name(char *filename)
{
      int         retval;
      ext2_ino_t  dir;
      char        *basename;
      
      basename = strrchr(filename, '/');
      if (basename) {
            *basename++ = '\0';
            dir = string_to_inode(filename);
            if (!dir)
                  return;
      } else {
            dir = cwd;
            basename = filename;
      }
      retval = ext2fs_unlink(current_fs, dir, basename, 0, 0);
      if (retval)
            com_err("unlink_file_by_name", retval, "");
      return;
}

void do_unlink(int argc, char *argv[])
{
      if (common_args_process(argc, argv, 2, 2, "link",
                        "<pathname>", CHECK_FS_RW))
            return;

      unlink_file_by_name(argv[1]);
}

void do_find_free_block(int argc, char *argv[])
{
      blk_t free_blk, goal;
      int         count;
      errcode_t   retval;
      char        *tmp;
      
      if ((argc > 3) || (argc==2 && *argv[1] == '?')) {
            com_err(argv[0], 0, "Usage: find_free_block [count [goal]]");
            return;
      }
      if (check_fs_open(argv[0]))
            return;

      if (argc > 1) {
            count = strtol(argv[1],&tmp,0);
            if (*tmp) {
                  com_err(argv[0], 0, "Bad count - %s", argv[1]);
                  return;
            }
      } else
            count = 1;

      if (argc > 2) {
            goal = strtol(argv[2], &tmp, 0);
            if (*tmp) {
                  com_err(argv[0], 0, "Bad goal - %s", argv[1]);
                  return;
            }
      }
      else
            goal = current_fs->super->s_first_data_block;

      printf("Free blocks found: ");
      free_blk = goal - 1;    
      while (count-- > 0) {
            retval = ext2fs_new_block(current_fs, free_blk + 1, 0,
                                &free_blk);
            if (retval) {
                  com_err("ext2fs_new_block", retval, "");
                  return;
            } else
                  printf("%d ", free_blk);
      }
      printf("\n");
}

void do_find_free_inode(int argc, char *argv[])
{
      ext2_ino_t  free_inode, dir;
      int         mode;
      int         retval;
      char        *tmp;
      
      if (argc > 3 || (argc>1 && *argv[1] == '?')) {
            com_err(argv[0], 0, "Usage: find_free_inode [dir] [mode]");
            return;
      }
      if (check_fs_open(argv[0]))
            return;

      if (argc > 1) {
            dir = strtol(argv[1], &tmp, 0);
            if (*tmp) {
                  com_err(argv[0], 0, "Bad dir - %s", argv[1]);
                  return;
            }
      }
      else
            dir = root;
      if (argc > 2) {
            mode = strtol(argv[2], &tmp, 0);
            if (*tmp) {
                  com_err(argv[0], 0, "Bad mode - %s", argv[2]);
                  return;
            }
      } else
            mode = 010755;

      retval = ext2fs_new_inode(current_fs, dir, mode, 0, &free_inode);
      if (retval)
            com_err("ext2fs_new_inode", retval, "");
      else
            printf("Free inode found: %u\n", free_inode);
}

static errcode_t copy_file(int fd, ext2_ino_t newfile)
{
      ext2_file_t e2_file;
      errcode_t   retval;
      int         got;
      unsigned int      written;
      char        buf[8192];
      char        *ptr;

      retval = ext2fs_file_open(current_fs, newfile,
                          EXT2_FILE_WRITE, &e2_file);
      if (retval)
            return retval;

      while (1) {
            got = read(fd, buf, sizeof(buf));
            if (got == 0)
                  break;
            if (got < 0) {
                  retval = errno;
                  goto fail;
            }
            ptr = buf;
            while (got > 0) {
                  retval = ext2fs_file_write(e2_file, ptr,
                                       got, &written);
                  if (retval)
                        goto fail;

                  got -= written;
                  ptr += written;
            }
      }
      retval = ext2fs_file_close(e2_file);
      return retval;

fail:
      (void) ext2fs_file_close(e2_file);
      return retval;
}


void do_write(int argc, char *argv[])
{
      int         fd;
      struct stat statbuf;
      ext2_ino_t  newfile;
      errcode_t   retval;
      struct ext2_inode inode;

      if (common_args_process(argc, argv, 3, 3, "write",
                        "<native file> <new file>", CHECK_FS_RW))
            return;

      fd = open(argv[1], O_RDONLY);
      if (fd < 0) {
            com_err(argv[1], errno, "");
            return;
      }
      if (fstat(fd, &statbuf) < 0) {
            com_err(argv[1], errno, "");
            close(fd);
            return;
      }

      retval = ext2fs_namei(current_fs, root, cwd, argv[2], &newfile);
      if (retval == 0) {
            com_err(argv[0], 0, "The file '%s' already exists\n", argv[2]);
            close(fd);
            return;
      }

      retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &newfile);
      if (retval) {
            com_err(argv[0], retval, "");
            close(fd);
            return;
      }
      printf("Allocated inode: %u\n", newfile);
      retval = ext2fs_link(current_fs, cwd, argv[2], newfile,
                       EXT2_FT_REG_FILE);
      if (retval == EXT2_ET_DIR_NO_SPACE) {
            retval = ext2fs_expand_dir(current_fs, cwd);
            if (retval) {
                  com_err(argv[0], retval, "while expanding directory");
                  return;
            }
            retval = ext2fs_link(current_fs, cwd, argv[2], newfile,
                             EXT2_FT_REG_FILE);
      }
      if (retval) {
            com_err(argv[2], retval, "");
            close(fd);
            return;
      }
        if (ext2fs_test_inode_bitmap(current_fs->inode_map,newfile))
            com_err(argv[0], 0, "Warning: inode already set");
      ext2fs_inode_alloc_stats2(current_fs, newfile, +1, 0);
      memset(&inode, 0, sizeof(inode));
      inode.i_mode = (statbuf.st_mode & ~LINUX_S_IFMT) | LINUX_S_IFREG;
      inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
      inode.i_links_count = 1;
      inode.i_size = statbuf.st_size;
      if (debugfs_write_new_inode(newfile, &inode, argv[0])) {
            close(fd);
            return;
      }
      if (LINUX_S_ISREG(inode.i_mode)) {
            retval = copy_file(fd, newfile);
            if (retval)
                  com_err("copy_file", retval, "");
      }
      close(fd);
}

void do_mknod(int argc, char *argv[])
{
      unsigned long     mode, major, minor;
      ext2_ino_t  newfile;
      errcode_t   retval;
      struct ext2_inode inode;
      int         filetype, nr;

      if (check_fs_open(argv[0]))
            return;
      if (argc < 3 || argv[2][1]) {
      usage:
            com_err(argv[0], 0, "Usage: mknod <name> [p| [c|b] <major> <minor>]");
            return;
      }
      mode = minor = major = 0;
      switch (argv[2][0]) {
            case 'p':
                  mode = LINUX_S_IFIFO;
                  filetype = EXT2_FT_FIFO;
                  nr = 3;
                  break;
            case 'c':
                  mode = LINUX_S_IFCHR;
                  filetype = EXT2_FT_CHRDEV;
                  nr = 5;
                  break;
            case 'b':
                  mode = LINUX_S_IFBLK;
                  filetype = EXT2_FT_BLKDEV;
                  nr = 5;
                  break;
            default:
                  filetype = 0;
                  nr = 0;
      }
      if (nr == 5) {
            major = strtoul(argv[3], argv+3, 0);
            minor = strtoul(argv[4], argv+4, 0);
            if (major > 65535 || minor > 65535 || argv[3][0] || argv[4][0])
                  nr = 0;
      }
      if (argc != nr)
            goto usage;
      if (check_fs_read_write(argv[0]))
            return;
      retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &newfile);
      if (retval) {
            com_err(argv[0], retval, "");
            return;
      }
      printf("Allocated inode: %u\n", newfile);
      retval = ext2fs_link(current_fs, cwd, argv[1], newfile, filetype);
      if (retval == EXT2_ET_DIR_NO_SPACE) {
            retval = ext2fs_expand_dir(current_fs, cwd);
            if (retval) {
                  com_err(argv[0], retval, "while expanding directory");
                  return;
            }
            retval = ext2fs_link(current_fs, cwd, argv[1], newfile,
                             filetype);
      }
      if (retval) {
            com_err(argv[1], retval, "");
            return;
      }
        if (ext2fs_test_inode_bitmap(current_fs->inode_map,newfile))
            com_err(argv[0], 0, "Warning: inode already set");
      ext2fs_mark_inode_bitmap(current_fs->inode_map, newfile);
      ext2fs_mark_ib_dirty(current_fs);
      memset(&inode, 0, sizeof(inode));
      inode.i_mode = mode;
      inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
      if ((major < 256) && (minor < 256)) {
            inode.i_block[0] = major*256+minor;
            inode.i_block[1] = 0;
      } else {
            inode.i_block[0] = 0;
            inode.i_block[1] = (minor & 0xff) | (major << 8) | ((minor & ~0xff) << 12);
      }
      inode.i_links_count = 1;
      if (debugfs_write_new_inode(newfile, &inode, argv[0]))
            return;
}

void do_mkdir(int argc, char *argv[])
{
      char  *cp;
      ext2_ino_t  parent;
      char  *name;
      errcode_t retval;

      if (common_args_process(argc, argv, 2, 2, "mkdir",
                        "<filename>", CHECK_FS_RW))
            return;

      cp = strrchr(argv[1], '/');
      if (cp) {
            *cp = 0;
            parent = string_to_inode(argv[1]);
            if (!parent) {
                  com_err(argv[1], ENOENT, "");
                  return;
            }
            name = cp+1;
      } else {
            parent = cwd;
            name = argv[1];
      }

try_again:
      retval = ext2fs_mkdir(current_fs, parent, 0, name);
      if (retval == EXT2_ET_DIR_NO_SPACE) {
            retval = ext2fs_expand_dir(current_fs, parent);
            if (retval) {
                  com_err("argv[0]", retval, "while expanding directory");
                  return;
            }
            goto try_again;
      }
      if (retval) {
            com_err("ext2fs_mkdir", retval, "");
            return;
      }

}

static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
                         int blockcnt EXT2FS_ATTR((unused)), 
                         void *private EXT2FS_ATTR((unused)))
{
      blk_t block;

      block = *blocknr;
      ext2fs_block_alloc_stats(fs, block, -1);
      return 0;
}

static void kill_file_by_inode(ext2_ino_t inode)
{
      struct ext2_inode inode_buf;

      if (debugfs_read_inode(inode, &inode_buf, 0))
            return;
      inode_buf.i_dtime = time(NULL);
      if (debugfs_write_inode(inode, &inode_buf, 0))
            return;
      if (!ext2fs_inode_has_valid_blocks(&inode_buf))
            return;

      ext2fs_block_iterate(current_fs, inode, 0, NULL,
                       release_blocks_proc, NULL);
      printf("\n");
      ext2fs_inode_alloc_stats2(current_fs, inode, -1,
                          LINUX_S_ISDIR(inode_buf.i_mode));
}


void do_kill_file(int argc, char *argv[])
{
      ext2_ino_t inode_num;

      if (common_inode_args_process(argc, argv, &inode_num, CHECK_FS_RW))
            return;

      kill_file_by_inode(inode_num);
}

void do_rm(int argc, char *argv[])
{
      int retval;
      ext2_ino_t inode_num;
      struct ext2_inode inode;

      if (common_args_process(argc, argv, 2, 2, "rm",
                        "<filename>", CHECK_FS_RW))
            return;

      retval = ext2fs_namei(current_fs, root, cwd, argv[1], &inode_num);
      if (retval) {
            com_err(argv[0], retval, "while trying to resolve filename");
            return;
      }

      if (debugfs_read_inode(inode_num, &inode, argv[0]))
            return;

      if (LINUX_S_ISDIR(inode.i_mode)) {
            com_err(argv[0], 0, "file is a directory");
            return;
      }

      --inode.i_links_count;
      if (debugfs_write_inode(inode_num, &inode, argv[0]))
            return;

      unlink_file_by_name(argv[1]);
      if (inode.i_links_count == 0)
            kill_file_by_inode(inode_num);
}

struct rd_struct {
      ext2_ino_t  parent;
      int         empty;
};

static int rmdir_proc(ext2_ino_t dir EXT2FS_ATTR((unused)),
                  int   entry EXT2FS_ATTR((unused)),
                  struct ext2_dir_entry *dirent,
                  int   offset EXT2FS_ATTR((unused)),
                  int   blocksize EXT2FS_ATTR((unused)),
                  char  *buf EXT2FS_ATTR((unused)),
                  void  *private)
{
      struct rd_struct *rds = (struct rd_struct *) private;

      if (dirent->inode == 0)
            return 0;
      if (((dirent->name_len&0xFF) == 1) && (dirent->name[0] == '.'))
            return 0;
      if (((dirent->name_len&0xFF) == 2) && (dirent->name[0] == '.') &&
          (dirent->name[1] == '.')) {
            rds->parent = dirent->inode;
            return 0;
      }
      rds->empty = 0;
      return 0;
}
      
void do_rmdir(int argc, char *argv[])
{
      int retval;
      ext2_ino_t inode_num;
      struct ext2_inode inode;
      struct rd_struct rds;

      if (common_args_process(argc, argv, 2, 2, "rmdir",
                        "<filename>", CHECK_FS_RW))
            return;

      retval = ext2fs_namei(current_fs, root, cwd, argv[1], &inode_num);
      if (retval) {
            com_err(argv[0], retval, "while trying to resolve filename");
            return;
      }

      if (debugfs_read_inode(inode_num, &inode, argv[0]))
            return;

      if (!LINUX_S_ISDIR(inode.i_mode)) {
            com_err(argv[0], 0, "file is not a directory");
            return;
      }

      rds.parent = 0;
      rds.empty = 1;

      retval = ext2fs_dir_iterate2(current_fs, inode_num, 0,
                            0, rmdir_proc, &rds);
      if (retval) {
            com_err(argv[0], retval, "while iterating over directory");
            return;
      }
      if (rds.empty == 0) {
            com_err(argv[0], 0, "directory not empty");
            return;
      }

      inode.i_links_count = 0;
      if (debugfs_write_inode(inode_num, &inode, argv[0]))
            return;

      unlink_file_by_name(argv[1]);
      kill_file_by_inode(inode_num);

      if (rds.parent) {
            if (debugfs_read_inode(rds.parent, &inode, argv[0]))
                  return;
            if (inode.i_links_count > 1)
                  inode.i_links_count--;
            if (debugfs_write_inode(rds.parent, &inode, argv[0]))
                  return;
      }
}

void do_show_debugfs_params(int argc EXT2FS_ATTR((unused)), 
                      char *argv[] EXT2FS_ATTR((unused)))
{
      FILE *out = stdout;

      if (current_fs)
            fprintf(out, "Open mode: read-%s\n",
                  current_fs->flags & EXT2_FLAG_RW ? "write" : "only");
      fprintf(out, "Filesystem in use: %s\n",
            current_fs ? current_fs->device_name : "--none--");
}

void do_expand_dir(int argc, char *argv[])
{
      ext2_ino_t inode;
      int retval;

      if (common_inode_args_process(argc, argv, &inode, CHECK_FS_RW))
            return;

      retval = ext2fs_expand_dir(current_fs, inode);
      if (retval)
            com_err("ext2fs_expand_dir", retval, "");
      return;
}

void do_features(int argc, char *argv[])
{
      int   i;
      
      if (check_fs_open(argv[0]))
            return;

      if ((argc != 1) && check_fs_read_write(argv[0]))
            return;
      for (i=1; i < argc; i++) {
            if (e2p_edit_feature(argv[i],
                             &current_fs->super->s_feature_compat, 0))
                  com_err(argv[0], 0, "Unknown feature: %s\n",
                        argv[i]);
            else
                  ext2fs_mark_super_dirty(current_fs);
      }
      print_features(current_fs->super, stdout);
}

void do_bmap(int argc, char *argv[])
{
      ext2_ino_t  ino;
      blk_t       blk, pblk;
      int         err;
      errcode_t   errcode;
      
      if (common_args_process(argc, argv, 3, 3, argv[0],
                        "<file> logical_blk", 0))
            return;

      ino = string_to_inode(argv[1]);
      if (!ino)
            return;
      blk = parse_ulong(argv[2], argv[0], "logical_block", &err);

      errcode = ext2fs_bmap(current_fs, ino, 0, 0, 0, blk, &pblk);
      if (errcode) {
            com_err("argv[0]", errcode,
                  "while mapping logical block %d\n", blk);
            return;
      }
      printf("%d\n", pblk);
}

void do_imap(int argc, char *argv[])
{
      ext2_ino_t  ino;
      unsigned long     group, block, block_nr, offset;

      if (common_args_process(argc, argv, 2, 2, argv[0],
                        "<file>", 0))
            return;
      ino = string_to_inode(argv[1]);
      if (!ino)
            return;

      group = (ino - 1) / EXT2_INODES_PER_GROUP(current_fs->super);
      offset = ((ino - 1) % EXT2_INODES_PER_GROUP(current_fs->super)) *
            EXT2_INODE_SIZE(current_fs->super);
      block = offset >> EXT2_BLOCK_SIZE_BITS(current_fs->super);
      if (!current_fs->group_desc[(unsigned)group].bg_inode_table) {
            com_err(argv[0], 0, "Inode table for group %lu is missing\n",
                  group);
            return;
      }
      block_nr = current_fs->group_desc[(unsigned)group].bg_inode_table + 
            block;
      offset &= (EXT2_BLOCK_SIZE(current_fs->super) - 1);

      printf("Inode %d is part of block group %lu\n"
             "\tlocated at block %lu, offset 0x%04lx\n", ino, group,
             block_nr, offset);

}



static int source_file(const char *cmd_file, int sci_idx)
{
      FILE        *f;
      char        buf[256];
      char        *cp;
      int         exit_status = 0;
      int         retval;

      if (strcmp(cmd_file, "-") == 0)
            f = stdin;
      else {
            f = fopen(cmd_file, "r");
            if (!f) {
                  perror(cmd_file);
                  exit(1);
            }
      }
      setbuf(stdout, NULL);
      setbuf(stderr, NULL);
      while (!feof(f)) {
            if (fgets(buf, sizeof(buf), f) == NULL)
                  break;
            cp = strchr(buf, '\n');
            if (cp)
                  *cp = 0;
            cp = strchr(buf, '\r');
            if (cp)
                  *cp = 0;
            printf("debugfs: %s\n", buf);
            retval = ss_execute_line(sci_idx, buf);
            if (retval) {
                  ss_perror(sci_idx, retval, buf);
                  exit_status++;
            }
      }
      return exit_status;
}

int main(int argc, char **argv)
{
      int         retval;
      int         sci_idx;
      const char  *usage = "Usage: debugfs [-b blocksize] [-s superblock] [-f cmd_file] [-R request] [-V] [[-w] [-c] device]";
      int         c;
      int         open_flags = 0;
      char        *request = 0;
      int         exit_status = 0;
      char        *cmd_file = 0;
      blk_t       superblock = 0;
      blk_t       blocksize = 0;
      int         catastrophic = 0;
      char        *data_filename = 0;
      
      initialize_ext2_error_table();
      fprintf (stderr, "debugfs %s (%s)\n", E2FSPROGS_VERSION,
             E2FSPROGS_DATE);

      while ((c = getopt (argc, argv, "iwcR:f:b:s:Vd:")) != EOF) {
            switch (c) {
            case 'R':
                  request = optarg;
                  break;
            case 'f':
                  cmd_file = optarg;
                  break;
            case 'd':
                  data_filename = optarg;
                  break;
            case 'i':
                  open_flags |= EXT2_FLAG_IMAGE_FILE;
                  break;
            case 'w':
                  open_flags |= EXT2_FLAG_RW;
                  break;
            case 'b':
                  blocksize = parse_ulong(optarg, argv[0], 
                                    "block size", 0);
                  break;
            case 's':
                  superblock = parse_ulong(optarg, argv[0], 
                                     "superblock number", 0);
                  break;
            case 'c':
                  catastrophic = 1;
                  break;
            case 'V':
                  /* Print version number and exit */
                  fprintf(stderr, "\tUsing %s\n",
                        error_message(EXT2_ET_BASE));
                  exit(0);
            default:
                  com_err(argv[0], 0, usage);
                  return 1;
            }
      }
      if (optind < argc)
            open_filesystem(argv[optind], open_flags,
                        superblock, blocksize, catastrophic,
                        data_filename);
      
      sci_idx = ss_create_invocation("debugfs", "0.0", (char *) NULL,
                               &debug_cmds, &retval);
      if (retval) {
            ss_perror(sci_idx, retval, "creating invocation");
            exit(1);
      }
      ss_get_readline(sci_idx);

      (void) ss_add_request_table (sci_idx, &ss_std_requests, 1, &retval);
      if (retval) {
            ss_perror(sci_idx, retval, "adding standard requests");
            exit (1);
      }
      if (request) {
            retval = 0;
            retval = ss_execute_line(sci_idx, request);
            if (retval) {
                  ss_perror(sci_idx, retval, request);
                  exit_status++;
            }
      } else if (cmd_file) {
            exit_status = source_file(cmd_file, sci_idx);
      } else {
            ss_listen(sci_idx);
      }

      if (current_fs)
            close_filesystem();
      
      return exit_status;
}

Generated by  Doxygen 1.6.0   Back to index