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1 /*
2  * Copyright (C) 2016 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 #include <ctype.h>
18 #include <errno.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <string.h>
22 #include <sys/cdefs.h>
23 
24 #define MAX_PATH 4096
25 #define MAX_FILE_VERSION 100
26 
27 #ifndef __STRING
28 #define __STRING(x) #x
29 #endif
30 #define ___STRING(x) __STRING(x)
31 
usage(char * filename)32 static void usage(char *filename)
33 {
34     fprintf(stderr, "Usage: %s input_blk_alloc_file output_base_fs_file \n", filename);
35 }
36 
main(int argc,char ** argv)37 int main(int argc, char **argv)
38 {
39     FILE *blk_alloc_file = NULL, *base_fs_file = NULL;
40     char filename[MAX_PATH+1], file_version[MAX_FILE_VERSION+1], *spaced_allocs = NULL;
41     size_t spaced_allocs_len = 0;
42 
43     if (argc != 3) {
44         usage(argv[0]);
45         exit(EXIT_FAILURE);
46     }
47     blk_alloc_file = fopen(argv[1], "r");
48     if (blk_alloc_file == NULL) {
49         fprintf(stderr, "failed to open %s: %s\n", argv[1], strerror(errno));
50         exit(EXIT_FAILURE);
51     }
52     base_fs_file = fopen(argv[2], "w");
53     if (base_fs_file == NULL) {
54         fprintf(stderr, "failed to open %s: %s\n", argv[2], strerror(errno));
55         exit(EXIT_FAILURE);
56     }
57     if (fscanf(blk_alloc_file, "Base EXT4 version %" ___STRING(MAX_FILE_VERSION) "s", file_version) > 0) {
58         int c;
59         printf("%s is already in *.base_fs format, just copying into %s...\n", argv[1], argv[2]);
60         rewind(blk_alloc_file);
61         while ((c = fgetc(blk_alloc_file)) != EOF) {
62             fputc(c, base_fs_file);
63         }
64         return 0;
65     } else {
66         printf("Converting %s into *.base_fs format as %s...\n", argv[1], argv[2]);
67         rewind(blk_alloc_file);
68     }
69     fprintf(base_fs_file, "Base EXT4 version 1.0\n");
70     while(fscanf(blk_alloc_file, "%" ___STRING(MAX_PATH) "s ", filename) != EOF) {
71         int i;
72         fprintf(base_fs_file, "%s ", filename);
73         if (getline(&spaced_allocs, &spaced_allocs_len, blk_alloc_file) == -1) {
74             fprintf(stderr, "Bad blk_alloc format\n");
75             exit(EXIT_FAILURE);
76         }
77         for (i = 0; spaced_allocs[i]; i++) {
78             if (spaced_allocs[i] == ' ') {
79                 if (!isspace(spaced_allocs[i + 1])) fputc(',', base_fs_file);
80             } else fputc(spaced_allocs[i], base_fs_file);
81         }
82     }
83     free(spaced_allocs);
84     fclose(blk_alloc_file);
85     fclose(base_fs_file);
86     return 0;
87 }
88