mirror of https://github.com/vitalif/e2fsprogs
329 lines
7.4 KiB
C
329 lines
7.4 KiB
C
/*
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* main.c --- ext2 resizer main program
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*
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* Copyright (C) 1997, 1998 by Theodore Ts'o and
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* PowerQuest, Inc.
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*
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* Copyright (C) 1999, 2000, 2001 by Theosore Ts'o
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#else
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extern char *optarg;
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extern int optind;
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#endif
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#include <fcntl.h>
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#include <sys/stat.h>
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#include "resize2fs.h"
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#include "../version.h"
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char *program_name, *device_name;
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static void usage (char *prog)
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{
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fprintf (stderr, _("usage: %s [-d debug_flags] [-f] [-F] [-p] device [new-size]\n\n"), prog);
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exit (1);
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}
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static errcode_t resize_progress_func(ext2_resize_t rfs, int pass,
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unsigned long cur, unsigned long max)
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{
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ext2_sim_progmeter progress;
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const char *label;
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errcode_t retval;
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progress = (ext2_sim_progmeter) rfs->prog_data;
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if (max == 0)
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return 0;
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if (cur == 0) {
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if (progress)
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ext2fs_progress_close(progress);
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progress = 0;
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switch (pass) {
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case E2_RSZ_EXTEND_ITABLE_PASS:
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label = _("Extending the inode table");
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break;
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case E2_RSZ_BLOCK_RELOC_PASS:
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label = _("Relocating blocks");
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break;
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case E2_RSZ_INODE_SCAN_PASS:
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label = _("Scanning inode table");
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break;
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case E2_RSZ_INODE_REF_UPD_PASS:
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label = _("Updating inode references");
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break;
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case E2_RSZ_MOVE_ITABLE_PASS:
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label = _("Moving inode table");
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break;
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default:
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label = _("Unknown pass?!?");
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break;
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}
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printf(_("Begin pass %d (max = %lu)\n"), pass, max);
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retval = ext2fs_progress_init(&progress, label, 30,
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40, max, 0);
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if (retval)
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progress = 0;
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rfs->prog_data = (void *) progress;
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}
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if (progress)
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ext2fs_progress_update(progress, cur);
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if (cur >= max) {
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if (progress)
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ext2fs_progress_close(progress);
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progress = 0;
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rfs->prog_data = 0;
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}
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return 0;
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}
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static void check_mount(char *device)
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{
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errcode_t retval;
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int mount_flags;
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retval = ext2fs_check_if_mounted(device, &mount_flags);
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if (retval) {
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com_err("ext2fs_check_if_mount", retval,
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_("while determining whether %s is mounted."),
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device);
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return;
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}
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if (!(mount_flags & EXT2_MF_MOUNTED))
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return;
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fprintf(stderr, _("%s is mounted; can't resize a "
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"mounted filesystem!\n\n"), device);
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exit(1);
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}
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static int get_units(const char *s)
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{
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if (strlen(s) != 1)
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return -1;
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switch(s[0]) {
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case 's':
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return 512;
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case 'K':
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return 1024;
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case 'M':
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return 1024*1024;
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case 'G':
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return 1024*1024*1024;
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}
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return -1;
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}
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int main (int argc, char ** argv)
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{
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errcode_t retval;
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ext2_filsys fs;
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int c;
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int flags = 0;
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int flush = 0;
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int force = 0;
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int fd;
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blk_t new_size = 0;
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blk_t max_size = 0;
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int units = 0;
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io_manager io_ptr;
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char *tmp;
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struct stat st_buf;
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unsigned int sys_page_size = 4096;
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long sysval;
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#ifdef ENABLE_NLS
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setlocale(LC_MESSAGES, "");
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setlocale(LC_CTYPE, "");
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bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
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textdomain(NLS_CAT_NAME);
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#endif
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initialize_ext2_error_table();
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fprintf (stderr, _("resize2fs %s (%s)\n"),
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E2FSPROGS_VERSION, E2FSPROGS_DATE);
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if (argc && *argv)
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program_name = *argv;
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while ((c = getopt (argc, argv, "d:fFhp")) != EOF) {
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switch (c) {
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case 'h':
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usage(program_name);
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break;
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case 'f':
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force = 1;
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break;
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case 'F':
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flush = 1;
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break;
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case 'd':
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flags |= atoi(optarg);
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break;
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case 'p':
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flags |= RESIZE_PERCENT_COMPLETE;
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break;
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default:
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usage(program_name);
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}
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}
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if (optind == argc)
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usage(program_name);
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device_name = argv[optind++];
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if (optind < argc) {
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new_size = strtoul(argv[optind++], &tmp, 0);
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if (*tmp) {
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units = get_units(tmp);
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if (units < 0) {
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com_err(program_name, 0,
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_("bad filesystem size - %s"),
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argv[optind - 1]);
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exit(1);
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}
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}
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}
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if (optind < argc)
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usage(program_name);
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check_mount(device_name);
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if (flush) {
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fd = open(device_name, O_RDONLY, 0);
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if (fd < 0) {
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com_err("open", errno,
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_("while opening %s for flushing"),
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device_name);
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exit(1);
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}
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retval = ext2fs_sync_device(fd, 1);
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if (retval) {
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com_err(argv[0], retval,
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_("while trying to flush %s"),
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device_name);
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exit(1);
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}
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close(fd);
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}
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if (flags & RESIZE_DEBUG_IO) {
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io_ptr = test_io_manager;
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test_io_backing_manager = unix_io_manager;
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} else
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io_ptr = unix_io_manager;
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retval = ext2fs_open (device_name, EXT2_FLAG_RW, 0, 0,
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io_ptr, &fs);
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if (retval) {
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com_err (program_name, retval, _("while trying to open %s"),
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device_name);
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printf (_("Couldn't find valid filesystem superblock.\n"));
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exit (1);
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}
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/*
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* Check for compatibility with the feature sets. We need to
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* be more stringent than ext2fs_open().
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*/
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if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
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com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
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"(%s)", device_name);
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exit(1);
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}
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/* Determine the system page size if possible */
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#ifdef HAVE_SYSCONF
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#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
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#define _SC_PAGESIZE _SC_PAGE_SIZE
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#endif
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#ifdef _SC_PAGESIZE
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sysval = sysconf(_SC_PAGESIZE);
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if (sysval > 0)
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sys_page_size = sysval;
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#endif /* _SC_PAGESIZE */
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#endif /* HAVE_SYSCONF */
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/*
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* Get the size of the containing partition, and use this for
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* defaults and for making sure the new filesystme doesn't
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* exceed the partition size.
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*/
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retval = ext2fs_get_device_size(device_name, fs->blocksize,
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&max_size);
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if (retval) {
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com_err(program_name, retval,
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_("while trying to determine filesystem size"));
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exit(1);
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}
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if (units) {
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if ((unsigned) units < fs->blocksize)
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new_size = (new_size * units) / fs->blocksize;
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else if ((unsigned) units > fs->blocksize)
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new_size = new_size * (units / fs->blocksize);
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}
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if (!new_size) {
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new_size = max_size;
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/* Round down to an even multiple of a pagesize */
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if (sys_page_size > fs->blocksize)
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new_size &= ~((sys_page_size / fs->blocksize)-1);
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}
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/*
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* If we are resizing a plain file, and it's not big enough,
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* automatically extend it in a sparse fashion by writing the
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* last requested block.
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*/
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if ((new_size > max_size) &&
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(stat(device_name, &st_buf) == 0) &&
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S_ISREG(st_buf.st_mode) &&
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((tmp = malloc(fs->blocksize)) != 0)) {
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memset(tmp, 0, fs->blocksize);
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retval = io_channel_write_blk(fs->io, new_size-1, 1, tmp);
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if (retval == 0)
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max_size = new_size;
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free(tmp);
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}
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if (!force && (new_size > max_size)) {
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fprintf(stderr, _("The containing partition (or device)"
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" is only %d (%dk) blocks.\nYou requested a new size"
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" of %d blocks.\n\n"), max_size,
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fs->blocksize / 1024, new_size);
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exit(1);
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}
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if (new_size == fs->super->s_blocks_count) {
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fprintf(stderr, _("The filesystem is already %d blocks "
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"long. Nothing to do!\n\n"), new_size);
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exit(0);
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}
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if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) ||
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(fs->super->s_state & EXT2_ERROR_FS) ||
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((fs->super->s_state & EXT2_VALID_FS) == 0))) {
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fprintf(stderr, _("Please run 'e2fsck -f %s' first.\n\n"),
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device_name);
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exit(1);
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}
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printf("Resizing the filesystem on %s to %d (%dk) blocks.\n",
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device_name, new_size, fs->blocksize / 1024);
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retval = resize_fs(fs, &new_size, flags,
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((flags & RESIZE_PERCENT_COMPLETE) ?
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resize_progress_func : 0));
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if (retval) {
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com_err(program_name, retval, _("while trying to resize %s"),
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device_name);
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ext2fs_close (fs);
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exit(1);
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}
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printf(_("The filesystem on %s is now %d blocks long.\n\n"),
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device_name, new_size);
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return (0);
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}
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