libsparse/img2simg.c

   1 /*
   2  * Copyright (C) 2012 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #define _FILE_OFFSET_BITS 64
  18 #define _LARGEFILE64_SOURCE 1
  19
  20 #include <fcntl.h>
  21 #include <stdbool.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <sys/types.h>
  28 #include <unistd.h>
  29
  30 #include <sparse/sparse.h>
  31
  32 #ifndef O_BINARY
  33 #define O_BINARY 0
  34 #endif
  35
  36 #if defined(__APPLE__) && defined(__MACH__)
  37 #define lseek64 lseek
  38 #define off64_t off_t
  39 #endif
  40
  41 void usage()
  42 {
  43     fprintf(stderr, "Usage: img2simg <raw_image_file> <sparse_image_file> [<block_size>]\n");
  44 }
  45
  46 int main(int argc, char *argv[])
  47 {
  48         int in;
  49         int out;
  50         int ret;
  51         struct sparse_file *s;
  52         unsigned int block_size = 4096;
  53         off64_t len;
  54
  55         if (argc < 3 || argc > 4) {
  56                 usage();
  57                 exit(-1);
  58         }
  59
  60         if (argc == 4) {
  61                 block_size = atoi(argv[3]);
  62         }
  63
  64         if (block_size < 1024 || block_size % 4 != 0) {
  65                 usage();
  66                 exit(-1);
  67         }
  68
  69         if (strcmp(argv[1], "-") == 0) {
  70                 in = STDIN_FILENO;
  71         } else {
  72                 in = open(argv[1], O_RDONLY | O_BINARY);
  73                 if (in < 0) {
  74                         fprintf(stderr, "Cannot open input file %s\n", argv[1]);
  75                         exit(-1);
  76                 }
  77         }
  78
  79         if (strcmp(argv[2], "-") == 0) {
  80                 out = STDOUT_FILENO;
  81         } else {
  82                 out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
  83                 if (out < 0) {
  84                         fprintf(stderr, "Cannot open output file %s\n", argv[2]);
  85                         exit(-1);
  86                 }
  87         }
  88
  89         len = lseek64(in, 0, SEEK_END);
  90         lseek64(in, 0, SEEK_SET);
  91
  92         s = sparse_file_new(block_size, len);
  93         if (!s) {
  94                 fprintf(stderr, "Failed to create sparse file\n");
  95                 exit(-1);
  96         }
  97
  98         sparse_file_verbose(s);
  99         ret = sparse_file_read(s, in, false, false);
 100         if (ret) {
 101                 fprintf(stderr, "Failed to read file\n");
 102                 exit(-1);
 103         }
 104
 105         ret = sparse_file_write(s, out, false, true, false);
 106         if (ret) {
 107                 fprintf(stderr, "Failed to write sparse file\n");
 108                 exit(-1);
 109         }
 110
 111         close(in);
 112         close(out);
 113
 114         exit(0);
 115 }