mirror of
https://git.openwrt.org/project/make_ext4fs.git
synced 2024-11-21 14:50:41 -05:00
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#define _FILE_OFFSET_BITS 64
|
|
#define _LARGEFILE64_SOURCE 1
|
|
#define _GNU_SOURCE
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sparse/sparse.h>
|
|
#include "sparse_file.h"
|
|
#include "backed_block.h"
|
|
|
|
#ifndef O_BINARY
|
|
#define O_BINARY 0
|
|
#endif
|
|
|
|
#if defined(__APPLE__) && defined(__MACH__)
|
|
#define lseek64 lseek
|
|
#endif
|
|
#if defined(__APPLE__) && defined(__MACH__)
|
|
#define lseek64 lseek
|
|
#define off64_t off_t
|
|
#endif
|
|
|
|
void usage()
|
|
{
|
|
fprintf(stderr, "Usage: append2simg <output> <input>\n");
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int output;
|
|
int output_block;
|
|
char *output_path;
|
|
struct sparse_file *sparse_output;
|
|
|
|
int input;
|
|
char *input_path;
|
|
off64_t input_len;
|
|
|
|
int tmp_fd;
|
|
char *tmp_path;
|
|
|
|
int ret;
|
|
|
|
if (argc == 3) {
|
|
output_path = argv[1];
|
|
input_path = argv[2];
|
|
} else {
|
|
usage();
|
|
exit(-1);
|
|
}
|
|
|
|
ret = asprintf(&tmp_path, "%s.append2simg", output_path);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Couldn't allocate filename\n");
|
|
exit(-1);
|
|
}
|
|
|
|
output = open(output_path, O_RDWR | O_BINARY);
|
|
if (output < 0) {
|
|
fprintf(stderr, "Couldn't open output file (%s)\n", strerror(errno));
|
|
exit(-1);
|
|
}
|
|
|
|
sparse_output = sparse_file_import_auto(output, true, true);
|
|
if (!sparse_output) {
|
|
fprintf(stderr, "Couldn't import output file\n");
|
|
exit(-1);
|
|
}
|
|
|
|
input = open(input_path, O_RDONLY | O_BINARY);
|
|
if (input < 0) {
|
|
fprintf(stderr, "Couldn't open input file (%s)\n", strerror(errno));
|
|
exit(-1);
|
|
}
|
|
|
|
input_len = lseek64(input, 0, SEEK_END);
|
|
if (input_len < 0) {
|
|
fprintf(stderr, "Couldn't get input file length (%s)\n", strerror(errno));
|
|
exit(-1);
|
|
} else if (input_len % sparse_output->block_size) {
|
|
fprintf(stderr, "Input file is not a multiple of the output file's block size");
|
|
exit(-1);
|
|
}
|
|
lseek64(input, 0, SEEK_SET);
|
|
|
|
output_block = sparse_output->len / sparse_output->block_size;
|
|
if (sparse_file_add_fd(sparse_output, input, 0, input_len, output_block) < 0) {
|
|
fprintf(stderr, "Couldn't add input file\n");
|
|
exit(-1);
|
|
}
|
|
sparse_output->len += input_len;
|
|
|
|
tmp_fd = open(tmp_path, O_WRONLY | O_CREAT | O_BINARY, 0664);
|
|
if (tmp_fd < 0) {
|
|
fprintf(stderr, "Couldn't open temporary file (%s)\n", strerror(errno));
|
|
exit(-1);
|
|
}
|
|
|
|
lseek64(output, 0, SEEK_SET);
|
|
if (sparse_file_write(sparse_output, tmp_fd, false, true, false) < 0) {
|
|
fprintf(stderr, "Failed to write sparse file\n");
|
|
exit(-1);
|
|
}
|
|
|
|
sparse_file_destroy(sparse_output);
|
|
close(tmp_fd);
|
|
close(output);
|
|
close(input);
|
|
|
|
ret = rename(tmp_path, output_path);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Failed to rename temporary file (%s)\n", strerror(errno));
|
|
exit(-1);
|
|
}
|
|
|
|
free(tmp_path);
|
|
|
|
exit(0);
|
|
}
|