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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* sqfsdiff.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfsdiff.h"
int main(int argc, char **argv)
{
int status, dirscan_flags = 0, ret = 0;
sqfsdiff_t sd;
memset(&sd, 0, sizeof(sd));
process_options(&sd, argc, argv);
if (sd.extract_dir != NULL) {
if (mkdir_p(sd.extract_dir))
return 2;
}
if (sd.compare_flags & COMPARE_TIMESTAMP)
dirscan_flags |= DIR_SCAN_READ_XATTR;
/* open first source */
sd.old_fd = open(sd.old_path, O_DIRECTORY | O_PATH | O_RDONLY);
if (sd.old_fd < 0) {
if (errno == ENOTDIR) {
sd.old_is_dir = false;
if (sqfs_reader_open(&sd.sqfs_old, sd.old_path, 0))
return 2;
} else {
perror(sd.old_path);
return 2;
}
} else {
sd.old_is_dir = true;
if (fstree_init(&sd.sqfs_old.fs, 512, NULL))
return 2;
if (fstree_from_dir(&sd.sqfs_old.fs, sd.old_path,
dirscan_flags)) {
fstree_cleanup(&sd.sqfs_old.fs);
return 2;
}
tree_node_sort_recursive(sd.sqfs_old.fs.root);
}
/* open second source */
sd.new_fd = open(sd.new_path, O_DIRECTORY | O_PATH | O_RDONLY);
if (sd.new_fd < 0) {
if (errno == ENOTDIR) {
sd.new_is_dir = false;
if (sqfs_reader_open(&sd.sqfs_new, sd.new_path, 0)) {
status = 2;
goto out_sqfs_old;
}
} else {
status = 2;
perror(sd.new_path);
goto out_sqfs_old;
}
} else {
sd.new_is_dir = true;
if (fstree_init(&sd.sqfs_new.fs, 512, NULL)) {
status = 2;
goto out_sqfs_old;
}
if (fstree_from_dir(&sd.sqfs_new.fs, sd.new_path,
dirscan_flags)) {
status = 2;
fstree_cleanup(&sd.sqfs_old.fs);
goto out_sqfs_old;
}
tree_node_sort_recursive(sd.sqfs_new.fs.root);
}
if (sd.extract_dir != NULL) {
if (chdir(sd.extract_dir)) {
perror(sd.extract_dir);
ret = -1;
goto out;
}
}
ret = node_compare(&sd, sd.sqfs_old.fs.root, sd.sqfs_new.fs.root);
if (ret != 0)
goto out;
if (sd.compare_super && !sd.old_is_dir && !sd.new_is_dir) {
ret = compare_super_blocks(&sd.sqfs_old.super,
&sd.sqfs_new.super);
if (ret != 0)
goto out;
}
out:
if (ret < 0) {
status = 2;
} else if (ret > 0) {
status = 1;
} else {
status = 0;
}
if (sd.new_is_dir) {
close(sd.new_fd);
fstree_cleanup(&sd.sqfs_new.fs);
} else {
sqfs_reader_close(&sd.sqfs_new);
}
out_sqfs_old:
if (sd.old_is_dir) {
close(sd.old_fd);
fstree_cleanup(&sd.sqfs_old.fs);
} else {
sqfs_reader_close(&sd.sqfs_old);
}
return status;
}
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