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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "unsquashfs.h"
extern const char *__progname;
int main(int argc, char **argv)
{
int fd, status = EXIT_FAILURE;
sqfs_super_t super;
compressor_t *cmp;
id_table_t idtbl;
if (argc != 2) {
fprintf(stderr, "Usage: %s <filename>\n", __progname);
return EXIT_FAILURE;
}
fd = open(argv[1], O_RDONLY);
if (fd < 0) {
perror(argv[1]);
return EXIT_FAILURE;
}
if (sqfs_super_read(&super, fd))
goto out;
if ((super.version_major != SQFS_VERSION_MAJOR) ||
(super.version_minor != SQFS_VERSION_MINOR)) {
fprintf(stderr,
"The image uses squashfs version %d.%d\n"
"We currently only supports version %d.%d (sorry).\n",
super.version_major, super.version_minor,
SQFS_VERSION_MAJOR, SQFS_VERSION_MINOR);
goto out;
}
if (super.flags & SQFS_FLAG_COMPRESSOR_OPTIONS) {
fputs("Image has been built with compressor options.\n"
"This is not yet supported.\n",
stderr);
goto out;
}
if (!compressor_exists(super.compression_id)) {
fputs("Image uses a compressor that has not been built in\n",
stderr);
goto out;
}
cmp = compressor_create(super.compression_id, false, super.block_size);
if (cmp == NULL)
goto out;
if (id_table_init(&idtbl))
goto out_cmp;
if (id_table_read(&idtbl, fd, &super, cmp))
goto out_idtbl;
status = EXIT_SUCCESS;
out_idtbl:
id_table_cleanup(&idtbl);
out_cmp:
cmp->destroy(cmp);
out:
close(fd);
return status;
}
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