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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* sqfs2tar.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfs2tar.h"
static sqfs_ostream_t *out_file = NULL;
static int terminate_archive(void)
{
char buffer[1024];
memset(buffer, '\0', sizeof(buffer));
return out_file->append(out_file, buffer, sizeof(buffer));
}
static int write_file_data(sqfs_dir_iterator_t *it, const sqfs_dir_entry_t *ent)
{
sqfs_istream_t *in;
int ret;
ret = it->open_file_ro(it, &in);
if (ret)
return ret;
do {
ret = sqfs_istream_splice(in, out_file,
SQFS_DEFAULT_BLOCK_SIZE);
} while (ret > 0);
in = sqfs_drop(in);
if (ret == 0)
ret = padd_file(out_file, ent->size);
return ret;
}
static int write_entry(sqfs_dir_iterator_t *it, const sqfs_dir_entry_t *ent)
{
static unsigned int record_counter;
sqfs_xattr_t *xattr = NULL;
char *target = NULL;
int ret;
if (S_ISLNK(ent->mode) ||
(ent->flags & SQFS_DIR_ENTRY_FLAG_HARD_LINK)) {
ret = it->read_link(it, &target);
if (ret != 0) {
sqfs_perror(ent->name, "reading link target", ret);
return ret;
}
}
ret = it->read_xattr(it, &xattr);
if (ret != 0) {
sqfs_perror(ent->name, "reading xattr data", ret);
sqfs_free(target);
return ret;
}
ret = write_tar_header(out_file, ent, target, xattr, record_counter++);
if (ret)
sqfs_perror(ent->name, "writing tar header", ret);
if (S_ISREG(ent->mode) && ret == 0)
ret = write_file_data(it, ent);
sqfs_xattr_list_free(xattr);
sqfs_free(target);
return ret;
}
int main(int argc, char **argv)
{
int ret, status = EXIT_FAILURE;
sqfs_dir_iterator_t *it = NULL;
process_args(argc, argv);
ret = ostream_open_stdout(&out_file);
if (ret) {
sqfs_perror("stdout", "creating stream wrapper", ret);
goto out;
}
if (compressor > 0) {
xfrm_stream_t *xfrm = compressor_stream_create(compressor,NULL);
sqfs_ostream_t *strm;
if (xfrm == NULL)
goto out;
strm = ostream_xfrm_create(out_file, xfrm);
sqfs_drop(out_file);
sqfs_drop(xfrm);
out_file = strm;
if (out_file == NULL)
goto out;
}
it = tar_compat_iterator_create(filename);
if (it == NULL)
goto out;
if (!no_links) {
sqfs_dir_iterator_t *hl;
ret = sqfs_hard_link_filter_create(&hl, it);
it = sqfs_drop(it);
if (ret != 0) {
sqfs_perror(filename, "creating hard link filter", ret);
goto out;
}
it = hl;
}
for (;;) {
sqfs_dir_entry_t *ent;
ret = it->next(it, &ent);
if (ret > 0)
break;
if (ret < 0) {
sqfs_perror(filename, "reading directory entry", ret);
goto out;
}
ret = write_entry(it, ent);
if (ret == SQFS_ERROR_UNSUPPORTED) {
fprintf(stderr, "WARNING: %s: unsupported file type\n",
ent->name);
if (dont_skip) {
fputs("Not allowed to skip files, aborting!\n",
stderr);
sqfs_free(ent);
goto out;
}
fprintf(stderr, "Skipping %s\n", ent->name);
sqfs_free(ent);
continue;
}
if (ret) {
sqfs_perror(ent->name, NULL, ret);
sqfs_free(ent);
goto out;
}
sqfs_free(ent);
}
if (terminate_archive())
goto out;
ret = out_file->flush(out_file);
if (ret) {
sqfs_perror(out_file->get_filename(out_file), NULL, ret);
goto out;
}
status = EXIT_SUCCESS;
out:
sqfs_drop(it);
sqfs_drop(out_file);
strlist_cleanup(&subdirs);
free(root_becomes);
return status;
}
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