Import libsparse sources

[project/make_ext4fs.git] / libsparse / img2simg.c

diff --git a/libsparse/img2simg.c b/libsparse/img2simg.c
new file mode 100644 (file)
index 0000000..a0db36f
--- /dev/null
+++ b/libsparse/img2simg.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2012 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 <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <sparse/sparse.h>
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#if defined(__APPLE__) && defined(__MACH__)
+#define lseek64 lseek
+#define off64_t off_t
+#endif
+
+void usage()
+{
+    fprintf(stderr, "Usage: img2simg <raw_image_file> <sparse_image_file> [<block_size>]\n");
+}
+
+int main(int argc, char *argv[])
+{
+       int in;
+       int out;
+       int ret;
+       struct sparse_file *s;
+       unsigned int block_size = 4096;
+       off64_t len;
+
+       if (argc < 3 || argc > 4) {
+               usage();
+               exit(-1);
+       }
+
+       if (argc == 4) {
+               block_size = atoi(argv[3]);
+       }
+
+       if (block_size < 1024 || block_size % 4 != 0) {
+               usage();
+               exit(-1);
+       }
+
+       if (strcmp(argv[1], "-") == 0) {
+               in = STDIN_FILENO;
+       } else {
+               in = open(argv[1], O_RDONLY | O_BINARY);
+               if (in < 0) {
+                       fprintf(stderr, "Cannot open input file %s\n", argv[1]);
+                       exit(-1);
+               }
+       }
+
+       if (strcmp(argv[2], "-") == 0) {
+               out = STDOUT_FILENO;
+       } else {
+               out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
+               if (out < 0) {
+                       fprintf(stderr, "Cannot open output file %s\n", argv[2]);
+                       exit(-1);
+               }
+       }
+
+       len = lseek64(in, 0, SEEK_END);
+       lseek64(in, 0, SEEK_SET);
+
+       s = sparse_file_new(block_size, len);
+       if (!s) {
+               fprintf(stderr, "Failed to create sparse file\n");
+               exit(-1);
+       }
+
+       sparse_file_verbose(s);
+       ret = sparse_file_read(s, in, false, false);
+       if (ret) {
+               fprintf(stderr, "Failed to read file\n");
+               exit(-1);
+       }
+
+       ret = sparse_file_write(s, out, false, true, false);
+       if (ret) {
+               fprintf(stderr, "Failed to write sparse file\n");
+               exit(-1);
+       }
+
+       close(in);
+       close(out);
+
+       exit(0);
+}