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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* extract.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfsdiff.h"
static int extract(data_reader_t *data, file_info_t *fi,
const char *path, char prefix)
{
char *ptr, *temp = alloca(strlen(path) + 3);
int fd;
temp[0] = prefix;
temp[1] = '/';
strcpy(temp + 2, path);
ptr = strrchr(temp, '/');
*ptr = '\0';
if (mkdir_p(temp))
return -1;
*ptr = '/';
fd = open(temp, O_CREAT | O_EXCL | O_WRONLY, 0600);
if (fd < 0) {
perror(temp);
return -1;
}
if (data_reader_dump_file(data, fi, fd, true)) {
close(fd);
return -1;
}
close(fd);
return 0;
}
int extract_files(file_info_t *old, file_info_t *new, const char *path)
{
if (old != NULL && !old_is_dir) {
if (extract(sqfs_old.data, old, path, 'a'))
return -1;
}
if (new != NULL && !new_is_dir) {
if (extract(sqfs_new.data, new, path, 'b'))
return -1;
}
return 0;
}
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