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Sourcecode: e2fsprogs version File versions

main.c

/*
 * main.c --- ext2 resizer main program
 *
 * Copyright (C) 1997, 1998 by Theodore Ts'o and
 *    PowerQuest, Inc.
 *
 * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o
 * 
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Public
 * License.
 * %End-Header%
 */

#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern char *optarg;
extern int optind;
#endif
#include <fcntl.h>
#include <sys/stat.h>

#include "e2p/e2p.h"

#include "resize2fs.h"

#include "../version.h"

char *program_name, *device_name, *io_options;

static void usage (char *prog)
{
      fprintf (stderr, _("usage: %s [-d debug_flags] [-f] [-F] [-p] device [new-size]\n\n"), prog);

      exit (1);
}

static errcode_t resize_progress_func(ext2_resize_t rfs, int pass,
                              unsigned long cur, unsigned long max)
{
      ext2_sim_progmeter progress;
      const char  *label;
      errcode_t   retval;

      progress = (ext2_sim_progmeter) rfs->prog_data;
      if (max == 0)
            return 0;
      if (cur == 0) {
            if (progress)
                  ext2fs_progress_close(progress);
            progress = 0;
            switch (pass) {
            case E2_RSZ_EXTEND_ITABLE_PASS:
                  label = _("Extending the inode table");
                  break;
            case E2_RSZ_BLOCK_RELOC_PASS:
                  label = _("Relocating blocks");
                  break;
            case E2_RSZ_INODE_SCAN_PASS:
                  label = _("Scanning inode table");
                  break;
            case E2_RSZ_INODE_REF_UPD_PASS:
                  label = _("Updating inode references");
                  break;
            case E2_RSZ_MOVE_ITABLE_PASS:
                  label = _("Moving inode table");
                  break;
            default:
                  label = _("Unknown pass?!?");
                  break;
            }
            printf(_("Begin pass %d (max = %lu)\n"), pass, max);
            retval = ext2fs_progress_init(&progress, label, 30,
                                    40, max, 0);
            if (retval)
                  progress = 0;
            rfs->prog_data = (void *) progress;
      }
      if (progress)
            ext2fs_progress_update(progress, cur);
      if (cur >= max) {
            if (progress)
                  ext2fs_progress_close(progress);
            progress = 0;
            rfs->prog_data = 0;
      }
      return 0;
}

static void check_mount(char *device)
{
      errcode_t   retval;
      int         mount_flags;

      retval = ext2fs_check_if_mounted(device, &mount_flags);
      if (retval) {
            com_err("ext2fs_check_if_mount", retval,
                  _("while determining whether %s is mounted."),
                  device);
            return;
      }
      if (!(mount_flags & EXT2_MF_MOUNTED))
            return;
      
      fprintf(stderr, _("%s is mounted; can't resize a "
            "mounted filesystem!\n\n"), device);
      exit(1);
}

int main (int argc, char ** argv)
{
      errcode_t   retval;
      ext2_filsys fs;
      int         c;
      int         flags = 0;
      int         flush = 0;
      int         force = 0;
      int         fd;
      blk_t       new_size = 0;
      blk_t       max_size = 0;
      io_manager  io_ptr;
      char        *tmp;
      char        *new_size_str = 0;
      struct stat st_buf;
      unsigned int      sys_page_size = 4096;
      long        sysval;

#ifdef ENABLE_NLS
      setlocale(LC_MESSAGES, "");
      setlocale(LC_CTYPE, "");
      bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
      textdomain(NLS_CAT_NAME);
#endif

      initialize_ext2_error_table();

      fprintf (stderr, _("resize2fs %s (%s)\n"),
             E2FSPROGS_VERSION, E2FSPROGS_DATE);
      if (argc && *argv)
            program_name = *argv;

      while ((c = getopt (argc, argv, "d:fFhp")) != EOF) {
            switch (c) {
            case 'h':
                  usage(program_name);
                  break;
            case 'f':
                  force = 1;
                  break;
            case 'F':
                  flush = 1;
                  break;
            case 'd':
                  flags |= atoi(optarg);
                  break;
            case 'p':
                  flags |= RESIZE_PERCENT_COMPLETE;
                  break;
            default:
                  usage(program_name);
            }
      }
      if (optind == argc)
            usage(program_name);

      device_name = argv[optind++];
      if (optind < argc)
            new_size_str = argv[optind++];
      if (optind < argc)
            usage(program_name);
      
      io_options = strchr(device_name, '?');
      if (io_options)
            *io_options++ = 0;

      check_mount(device_name);
      
      if (flush) {
            fd = open(device_name, O_RDONLY, 0);

            if (fd < 0) {
                  com_err("open", errno,
                        _("while opening %s for flushing"),
                        device_name);
                  exit(1);
            }
            retval = ext2fs_sync_device(fd, 1);
            if (retval) {
                  com_err(argv[0], retval, 
                        _("while trying to flush %s"),
                        device_name);
                  exit(1);
            }
            close(fd);
      }

      if (flags & RESIZE_DEBUG_IO) {
            io_ptr = test_io_manager;
            test_io_backing_manager = unix_io_manager;
      } else 
            io_ptr = unix_io_manager;

      retval = ext2fs_open2(device_name, io_options, EXT2_FLAG_RW, 
                        0, 0, io_ptr, &fs);
      if (retval) {
            com_err (program_name, retval, _("while trying to open %s"),
                   device_name);
            printf (_("Couldn't find valid filesystem superblock.\n"));
            exit (1);
      }
      /*
       * Check for compatibility with the feature sets.  We need to
       * be more stringent than ext2fs_open().
       */
      if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
            com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
                  "(%s)", device_name);
            exit(1);
      }
      
      /* Determine the system page size if possible */
#ifdef HAVE_SYSCONF
#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
#define _SC_PAGESIZE _SC_PAGE_SIZE
#endif
#ifdef _SC_PAGESIZE
      sysval = sysconf(_SC_PAGESIZE);
      if (sysval > 0)
            sys_page_size = sysval;
#endif /* _SC_PAGESIZE */
#endif /* HAVE_SYSCONF */

      /*
       * Get the size of the containing partition, and use this for
       * defaults and for making sure the new filesystme doesn't
       * exceed the partition size.
       */
      retval = ext2fs_get_device_size(device_name, fs->blocksize,
                              &max_size);
      if (retval) {
            com_err(program_name, retval,
                  _("while trying to determine filesystem size"));
            exit(1);
      }
      if (new_size_str) {
            new_size = parse_num_blocks(new_size_str, 
                                  fs->super->s_log_block_size);
            if (!new_size) {
                  com_err(program_name, 0, _("bad filesystem size - %s"),
                        new_size_str);
                  exit(1);
            }
      } else {
            new_size = max_size;
            /* Round down to an even multiple of a pagesize */
            if (sys_page_size > fs->blocksize)
                  new_size &= ~((sys_page_size / fs->blocksize)-1);
      }
      
      /*
       * If we are resizing a plain file, and it's not big enough,
       * automatically extend it in a sparse fashion by writing the
       * last requested block.
       */
      if ((new_size > max_size) &&
          (stat(device_name, &st_buf) == 0) &&
          S_ISREG(st_buf.st_mode) &&
          ((tmp = malloc(fs->blocksize)) != 0)) {
            memset(tmp, 0, fs->blocksize);
            retval = io_channel_write_blk(fs->io, new_size-1, 1, tmp);
            if (retval == 0)
                  max_size = new_size;
            free(tmp);
      }
      if (!force && (new_size > max_size)) {
            fprintf(stderr, _("The containing partition (or device)"
                  " is only %d (%dk) blocks.\nYou requested a new size"
                  " of %d blocks.\n\n"), max_size,
                  fs->blocksize / 1024, new_size);
            exit(1);
      }
      if (new_size == fs->super->s_blocks_count) {
            fprintf(stderr, _("The filesystem is already %d blocks "
                  "long.  Nothing to do!\n\n"), new_size);
            exit(0);
      }
      if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) ||
                   (fs->super->s_state & EXT2_ERROR_FS) ||
                   ((fs->super->s_state & EXT2_VALID_FS) == 0))) {
            fprintf(stderr, _("Please run 'e2fsck -f %s' first.\n\n"),
                  device_name);
            exit(1);
      }
      printf("Resizing the filesystem on %s to %d (%dk) blocks.\n",
             device_name, new_size, fs->blocksize / 1024);
      retval = resize_fs(fs, &new_size, flags,
                     ((flags & RESIZE_PERCENT_COMPLETE) ?
                      resize_progress_func : 0));
      if (retval) {
            com_err(program_name, retval, _("while trying to resize %s"),
                  device_name);
            ext2fs_close (fs);
            exit(1);
      }
      printf(_("The filesystem on %s is now %d blocks long.\n\n"),
             device_name, new_size);
      return (0);
}

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