6150b00b60
This adds support for converting files with holes to "don't care" chunks. This can result in a substantial reduction in the time it takes to program an image if it has many holes. Generally, constants compared to argc have been reduced by one, since we no longer have the program name as the first argument. Change-Id: I00750edc07d6415dcc07ae0351e9397b0222b7ba
131 lines
2.8 KiB
C++
131 lines
2.8 KiB
C++
/*
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* Copyright (C) 2012 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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#include <fcntl.h>
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#include <stdbool.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 <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sparse/sparse.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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#define off64_t off_t
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#endif
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void usage() {
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fprintf(stderr, "Usage: img2simg [-s] <raw_image_file> <sparse_image_file> [<block_size>]\n");
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}
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int main(int argc, char* argv[]) {
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char *arg_in;
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char *arg_out;
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enum sparse_read_mode mode = SPARSE_READ_MODE_NORMAL;
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int extra;
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int in;
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int opt;
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int out;
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int ret;
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struct sparse_file* s;
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unsigned int block_size = 4096;
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off64_t len;
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while ((opt = getopt(argc, argv, "s")) != -1) {
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switch (opt) {
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case 's':
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mode = SPARSE_READ_MODE_HOLE;
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break;
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default:
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usage();
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exit(-1);
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}
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}
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extra = argc - optind;
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if (extra < 2 || extra > 3) {
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usage();
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exit(-1);
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}
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if (extra == 3) {
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block_size = atoi(argv[optind + 2]);
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}
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if (block_size < 1024 || block_size % 4 != 0) {
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usage();
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exit(-1);
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}
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arg_in = argv[optind];
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if (strcmp(arg_in, "-") == 0) {
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in = STDIN_FILENO;
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} else {
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in = open(arg_in, O_RDONLY | O_BINARY);
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if (in < 0) {
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fprintf(stderr, "Cannot open input file %s\n", arg_in);
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exit(-1);
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}
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}
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arg_out = argv[optind + 1];
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if (strcmp(arg_out, "-") == 0) {
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out = STDOUT_FILENO;
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} else {
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out = open(arg_out, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
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if (out < 0) {
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fprintf(stderr, "Cannot open output file %s\n", arg_out);
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exit(-1);
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}
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}
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len = lseek64(in, 0, SEEK_END);
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lseek64(in, 0, SEEK_SET);
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s = sparse_file_new(block_size, len);
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if (!s) {
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fprintf(stderr, "Failed to create sparse file\n");
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exit(-1);
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}
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sparse_file_verbose(s);
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ret = sparse_file_read(s, in, mode, false);
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if (ret) {
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fprintf(stderr, "Failed to read file\n");
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exit(-1);
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}
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ret = sparse_file_write(s, out, false, true, false);
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if (ret) {
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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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close(in);
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close(out);
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exit(0);
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}
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