| /* |
| * main.c --- ext2 resizer main program |
| * |
| * Copyright (C) 1997 Theodore Ts'o |
| * |
| * %Begin-Header% |
| * All rights reserved. |
| * %End-Header% |
| */ |
| |
| #ifdef HAVE_GETOPT_H |
| #include <getopt.h> |
| #endif |
| #include <fcntl.h> |
| #include <sys/ioctl.h> |
| |
| |
| #include "resize2fs.h" |
| |
| #define E2FSPROGS_VERSION "1.10" |
| #define E2FSPROGS_DATE "27-Apr-97" |
| |
| char *program_name, *device_name; |
| |
| static volatile void usage (char *prog) |
| { |
| fprintf (stderr, "usage: %s [-d debug_flags] [-p] [-F] device new-size\n", prog); |
| exit (1); |
| } |
| |
| void main (int argc, char ** argv) |
| { |
| errcode_t retval; |
| ext2_filsys fs; |
| int c; |
| int flags = 0; |
| int flush = 0; |
| int fd; |
| blk_t new_size; |
| io_manager io_ptr; |
| |
| fprintf (stderr, "resize2fs %s, %s for EXT2 FS %s, %s\n", |
| E2FSPROGS_VERSION, E2FSPROGS_DATE, |
| EXT2FS_VERSION, EXT2FS_DATE); |
| if (argc && *argv) |
| program_name = *argv; |
| |
| while ((c = getopt (argc, argv, "d:Fhp")) != EOF) { |
| switch (c) { |
| case 'h': |
| usage(program_name); |
| 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 - 2) |
| usage (program_name); |
| device_name = argv[optind++]; |
| new_size = atoi(argv[optind++]); |
| initialize_ext2_error_table(); |
| |
| if (flush) { |
| #ifdef BLKFLSBUF |
| fd = open(device_name, O_RDONLY, 0); |
| |
| if (fd < 0) { |
| com_err("open", errno, "while opening %s for flushing", |
| device_name); |
| exit(1); |
| } |
| if (ioctl(fd, BLKFLSBUF, 0) < 0) { |
| com_err("BLKFLSBUF", errno, "while trying to flush %s", |
| device_name); |
| exit(1); |
| } |
| close(fd); |
| #else |
| fprintf(stderr, "BLKFLSBUF not supported"); |
| exit(1); |
| #endif /* BLKFLSBUF */ |
| } |
| |
| 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_open (device_name, 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); |
| } |
| retval = ext2fs_read_bitmaps(fs); |
| if (retval) { |
| com_err (program_name, retval, |
| "while trying to read the bitmaps", device_name); |
| ext2fs_close (fs); |
| exit (1); |
| } |
| retval = resize_fs(fs, new_size, flags); |
| if (retval) { |
| com_err(program_name, retval, "while trying to resize %s", |
| device_name); |
| ext2fs_close (fs); |
| } |
| exit (0); |
| } |