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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(sqfs_data_reader_t *data, const sqfs_inode_generic_t *inode,
const char *prefix, const char *path, size_t block_size)
{
char *ptr, *temp;
ostream_t *fp;
temp = alloca(strlen(prefix) + strlen(path) + 2);
sprintf(temp, "%s/%s", prefix, path);
ptr = strrchr(temp, '/');
*ptr = '\0';
if (mkdir_p(temp))
return -1;
*ptr = '/';
fp = ostream_open_file(temp, OSTREAM_OPEN_OVERWRITE |
OSTREAM_OPEN_SPARSE);
if (fp == NULL) {
perror(temp);
return -1;
}
if (sqfs_data_reader_dump(path, data, inode, fp, block_size)) {
sqfs_drop(fp);
return -1;
}
ostream_flush(fp);
sqfs_drop(fp);
return 0;
}
int extract_files(sqfsdiff_t *sd, const sqfs_inode_generic_t *old,
const sqfs_inode_generic_t *new,
const char *path)
{
if (old != NULL) {
if (extract(sd->sqfs_old.data, old, "old",
path, sd->sqfs_old.super.block_size))
return -1;
}
if (new != NULL) {
if (extract(sd->sqfs_new.data, new, "new",
path, sd->sqfs_new.super.block_size))
return -1;
}
return 0;
}
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