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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* rdsquashfs.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "rdsquashfs.h"
static void dump_xattrs(fstree_t *fs, tree_xattr_t *xattr)
{
const char *key, *value;
size_t i;
for (i = 0; i < xattr->num_attr; ++i) {
key = str_table_get_string(&fs->xattr_keys,
xattr->attr[i].key_index);
value = str_table_get_string(&fs->xattr_values,
xattr->attr[i].value_index);
printf("%s=%s\n", key, value);
}
}
int main(int argc, char **argv)
{
sqfs_compressor_config_t cfg;
int status = EXIT_FAILURE;
sqfs_compressor_t *cmp;
data_reader_t *data;
sqfs_super_t super;
sqfs_file_t *file;
tree_node_t *n;
options_t opt;
fstree_t fs;
process_command_line(&opt, argc, argv);
file = sqfs_open_file(opt.image_name, SQFS_FILE_OPEN_READ_ONLY);
if (file == NULL) {
perror(opt.image_name);
goto out_cmd;
}
if (sqfs_super_read(&super, file)) {
fprintf(stderr, "%s: error reading super block.\n",
opt.image_name);
goto out_file;
}
if (!sqfs_compressor_exists(super.compression_id)) {
fprintf(stderr, "%s: unknown compressor used.\n",
opt.image_name);
goto out_file;
}
sqfs_compressor_config_init(&cfg, super.compression_id,
super.block_size,
SQFS_COMP_FLAG_UNCOMPRESS);
cmp = sqfs_compressor_create(&cfg);
if (cmp == NULL)
goto out_file;
if (super.flags & SQFS_FLAG_COMPRESSOR_OPTIONS) {
if (cmp->read_options(cmp, file))
goto out_cmp;
}
if (super.flags & SQFS_FLAG_NO_XATTRS)
opt.rdtree_flags &= ~RDTREE_READ_XATTR;
if (deserialize_fstree(&fs, &super, cmp, file, opt.rdtree_flags))
goto out_cmp;
fstree_gen_file_list(&fs);
data = data_reader_create(file, &super, cmp);
if (data == NULL)
goto out_fs;
if (opt.cmdpath != NULL) {
n = fstree_node_from_path(&fs, opt.cmdpath);
if (n == NULL) {
perror(opt.cmdpath);
goto out;
}
} else {
n = fs.root;
}
switch (opt.op) {
case OP_LS:
list_files(n);
break;
case OP_CAT:
if (!S_ISREG(n->mode)) {
fprintf(stderr, "/%s: not a regular file\n",
opt.cmdpath);
goto out;
}
if (data_reader_dump_file(data, n->data.file,
STDOUT_FILENO, false))
goto out;
break;
case OP_UNPACK:
if (opt.unpack_root != NULL) {
if (mkdir_p(opt.unpack_root))
return -1;
if (pushd(opt.unpack_root))
return -1;
}
if (restore_fstree(n, opt.flags))
goto out;
if (fill_unpacked_files(&fs, data, opt.flags))
goto out;
if (update_tree_attribs(&fs, n, opt.flags))
goto out;
if (opt.unpack_root != NULL && popd() != 0)
goto out;
break;
case OP_DESCRIBE:
if (describe_tree(fs.root, opt.unpack_root))
goto out;
break;
case OP_RDATTR:
if (n->xattr != NULL)
dump_xattrs(&fs, n->xattr);
break;
}
status = EXIT_SUCCESS;
out:
data_reader_destroy(data);
out_fs:
fstree_cleanup(&fs);
out_cmp:
cmp->destroy(cmp);
out_file:
file->destroy(file);
out_cmd:
free(opt.cmdpath);
return status;
}
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