+++ /dev/null
-/*
- * Copyright (C) 2010 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
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-#include <libgen.h>
-#include <unistd.h>
-
-#include <sparse/sparse.h>
-
-#include "ext4_utils.h"
-#include "make_ext4fs.h"
-#include "allocate.h"
-
-#if defined(__APPLE__) && defined(__MACH__)
-#define off64_t off_t
-#endif
-
-#ifndef USE_MINGW /* O_BINARY is windows-specific flag */
-#define O_BINARY 0
-#endif
-
-extern struct fs_info info;
-
-static int verbose = 0;
-
-static void usage(char *path)
-{
- fprintf(stderr, "%s [ options ] <image or block device> <output image>\n", path);
- fprintf(stderr, "\n");
- fprintf(stderr, " -c include CRC block\n");
- fprintf(stderr, " -v verbose output\n");
- fprintf(stderr, " -z gzip output\n");
- fprintf(stderr, " -S don't use sparse output format\n");
-}
-
-static int build_sparse_ext(int fd, const char *filename)
-{
- unsigned int i;
- unsigned int block;
- int start_contiguous_block;
- u8 *block_bitmap;
- off64_t ret;
-
- block_bitmap = malloc(info.block_size);
- if (!block_bitmap)
- critical_error("failed to allocate block bitmap");
-
- if (aux_info.first_data_block > 0)
- sparse_file_add_file(ext4_sparse_file, filename, 0,
- info.block_size * aux_info.first_data_block, 0);
-
- for (i = 0; i < aux_info.groups; i++) {
- u32 first_block = aux_info.first_data_block + i * info.blocks_per_group;
- u32 last_block = min(info.blocks_per_group, aux_info.len_blocks - first_block);
-
- ret = lseek64(fd, (u64)info.block_size * aux_info.bg_desc[i].bg_block_bitmap,
- SEEK_SET);
- if (ret < 0)
- critical_error_errno("failed to seek to block group bitmap %d", i);
-
- ret = read(fd, block_bitmap, info.block_size);
- if (ret < 0)
- critical_error_errno("failed to read block group bitmap %d", i);
- if (ret != (int)info.block_size)
- critical_error("failed to read all of block group bitmap %d", i);
-
- start_contiguous_block = -1;
- for (block = 0; block < last_block; block++) {
- if (start_contiguous_block >= 0) {
- if (!bitmap_get_bit(block_bitmap, block)) {
- u32 start_block = first_block + start_contiguous_block;
- u32 len_blocks = block - start_contiguous_block;
-
- sparse_file_add_file(ext4_sparse_file, filename,
- (u64)info.block_size * start_block,
- info.block_size * len_blocks, start_block);
- start_contiguous_block = -1;
- }
- } else {
- if (bitmap_get_bit(block_bitmap, block))
- start_contiguous_block = block;
- }
- }
-
- if (start_contiguous_block >= 0) {
- u32 start_block = first_block + start_contiguous_block;
- u32 len_blocks = last_block - start_contiguous_block;
- sparse_file_add_file(ext4_sparse_file, filename,
- (u64)info.block_size * start_block,
- info.block_size * len_blocks, start_block);
- }
- }
-
- return 0;
-}
-
-int main(int argc, char **argv)
-{
- int opt;
- const char *in = NULL;
- const char *out = NULL;
- int gzip = 0;
- int sparse = 1;
- int infd, outfd;
- int crc = 0;
-
- while ((opt = getopt(argc, argv, "cvzS")) != -1) {
- switch (opt) {
- case 'c':
- crc = 1;
- break;
- case 'v':
- verbose = 1;
- break;
- case 'z':
- gzip = 1;
- break;
- case 'S':
- sparse = 0;
- break;
- }
- }
-
- if (optind >= argc) {
- fprintf(stderr, "Expected image or block device after options\n");
- usage(argv[0]);
- exit(EXIT_FAILURE);
- }
-
- in = argv[optind++];
-
- if (optind >= argc) {
- fprintf(stderr, "Expected output image after input image\n");
- usage(argv[0]);
- exit(EXIT_FAILURE);
- }
-
- out = argv[optind++];
-
- if (optind < argc) {
- fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
- usage(argv[0]);
- exit(EXIT_FAILURE);
- }
-
- infd = open(in, O_RDONLY);
-
- if (infd < 0)
- critical_error_errno("failed to open input image");
-
- read_ext(infd, verbose);
-
- ext4_sparse_file = sparse_file_new(info.block_size, info.len);
-
- build_sparse_ext(infd, in);
-
- close(infd);
-
- if (strcmp(out, "-")) {
- outfd = open(out, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
- if (outfd < 0) {
- error_errno("open");
- return EXIT_FAILURE;
- }
- } else {
- outfd = STDOUT_FILENO;
- }
-
- write_ext4_image(outfd, gzip, sparse, crc);
- close(outfd);
-
- sparse_file_destroy(ext4_sparse_file);
-
- return 0;
-}
projects / project / make_ext4fs.git / blobdiff