1 /*
2  * Copyright 2017 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 "FuncFuzzerUtils.h"
18 #include <getopt.h>
19 
20 namespace android {
21 namespace vts {
22 
23 static void usage() {
24   fprintf(
25       stdout,
26       "Usage:\n"
27       "\n"
28       "./<fuzzer> <vts flags> -- <libfuzzer flags>\n"
29       "\n"
30       "VTS flags (strictly in form --flag=value):\n"
31       "\n"
32       " vts_target_func \tName of function to be fuzzed.\n"
33       "\n"
34       "libfuzzer flags (strictly in form -flag=value):\n"
35       " Use -help=1 to see libfuzzer flags\n"
36       "Example:\n"
37       "./<fuzzer_name> --vts_target_func=\"foo\" -- -max_len=128 -runs=100\n"
38       "\n");
39 }
40 
41 static struct option long_options[] = {
42     {"help", no_argument, 0, 'h'},
43     {"vts_target_function", required_argument, 0, 't'}
44 };
45 
46 
47 FuncFuzzerParams ExtractFuncFuzzerParams(int argc, char **argv) {
48   FuncFuzzerParams params;
49   int opt = 0;
50   int index = 0;
51   while ((opt = getopt_long_only(argc, argv, "", long_options, &index)) != -1) {
52     switch (opt) {
53       case 'h':
54         usage();
55         exit(0);
56       case 't':
57         params.target_func_ = optarg;
58         break;
59       default:
60         // Ignore. This option will be handled by libfuzzer.
61         break;
62     }
63   }
64   return params;
65 }
66 
67 }  // namespace vts
68 }  // namespace android
69 
70