mirror of
https://git.openwrt.org/project/make_ext4fs.git
synced 2024-11-25 08:40:42 -05:00
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define _FILE_OFFSET_BITS 64
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#define _LARGEFILE64_SOURCE 1
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#define _GNU_SOURCE
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sparse/sparse.h>
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#include "sparse_file.h"
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#include "backed_block.h"
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#if defined(__APPLE__) && defined(__MACH__)
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#define lseek64 lseek
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#endif
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#if defined(__APPLE__) && defined(__MACH__)
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#define lseek64 lseek
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#define off64_t off_t
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#endif
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void usage()
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{
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fprintf(stderr, "Usage: append2simg <output> <input>\n");
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}
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int main(int argc, char *argv[])
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{
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int output;
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int output_block;
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char *output_path;
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struct sparse_file *sparse_output;
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int input;
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char *input_path;
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off64_t input_len;
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int tmp_fd;
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char *tmp_path;
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int ret;
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if (argc == 3) {
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output_path = argv[1];
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input_path = argv[2];
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} else {
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usage();
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exit(-1);
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}
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ret = asprintf(&tmp_path, "%s.append2simg", output_path);
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if (ret < 0) {
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fprintf(stderr, "Couldn't allocate filename\n");
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exit(-1);
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}
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output = open(output_path, O_RDWR | O_BINARY);
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if (output < 0) {
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fprintf(stderr, "Couldn't open output file (%s)\n", strerror(errno));
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exit(-1);
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}
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sparse_output = sparse_file_import_auto(output, true, true);
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if (!sparse_output) {
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fprintf(stderr, "Couldn't import output file\n");
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exit(-1);
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}
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input = open(input_path, O_RDONLY | O_BINARY);
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if (input < 0) {
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fprintf(stderr, "Couldn't open input file (%s)\n", strerror(errno));
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exit(-1);
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}
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input_len = lseek64(input, 0, SEEK_END);
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if (input_len < 0) {
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fprintf(stderr, "Couldn't get input file length (%s)\n", strerror(errno));
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exit(-1);
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} else if (input_len % sparse_output->block_size) {
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fprintf(stderr, "Input file is not a multiple of the output file's block size");
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exit(-1);
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}
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lseek64(input, 0, SEEK_SET);
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output_block = sparse_output->len / sparse_output->block_size;
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if (sparse_file_add_fd(sparse_output, input, 0, input_len, output_block) < 0) {
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fprintf(stderr, "Couldn't add input file\n");
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exit(-1);
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}
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sparse_output->len += input_len;
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tmp_fd = open(tmp_path, O_WRONLY | O_CREAT | O_BINARY, 0664);
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if (tmp_fd < 0) {
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fprintf(stderr, "Couldn't open temporary file (%s)\n", strerror(errno));
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exit(-1);
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}
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lseek64(output, 0, SEEK_SET);
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if (sparse_file_write(sparse_output, tmp_fd, false, true, false) < 0) {
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fprintf(stderr, "Failed to write sparse file\n");
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exit(-1);
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}
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sparse_file_destroy(sparse_output);
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close(tmp_fd);
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close(output);
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close(input);
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ret = rename(tmp_path, output_path);
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if (ret < 0) {
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fprintf(stderr, "Failed to rename temporary file (%s)\n", strerror(errno));
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exit(-1);
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}
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free(tmp_path);
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exit(0);
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}
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