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/*
* 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);
}
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