1 /*
2 * Copyright (C) 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 <signal.h>
18 #include <stdlib.h>
19 #include <string.h>
20
21 #include <string>
22 #include <vector>
23
24 #include "logcat.h"
25
main(int argc,char ** argv,char ** envp)26 int main(int argc, char** argv, char** envp) {
27 android_logcat_context ctx = create_android_logcat();
28 if (!ctx) return -1;
29
30 signal(SIGPIPE, exit);
31
32 // Save and detect presence of -L or --last flag
33 std::vector<std::string> args;
34 bool last = false;
35 for (int i = 0; i < argc; ++i) {
36 if (!argv[i]) continue;
37 args.push_back(std::string(argv[i]));
38 if (!strcmp(argv[i], "-L") || !strcmp(argv[i], "--last")) last = true;
39 }
40
41 // Generate argv from saved content
42 std::vector<const char*> argv_hold;
43 for (auto& str : args) argv_hold.push_back(str.c_str());
44 argv_hold.push_back(nullptr);
45
46 int ret = 0;
47 if (last) {
48 // Run logcat command with -L flag
49 ret = android_logcat_run_command(ctx, -1, -1, argv_hold.size() - 1,
50 (char* const*)&argv_hold[0], envp);
51 // Remove -L and --last flags from argument list
52 for (std::vector<const char*>::iterator it = argv_hold.begin();
53 it != argv_hold.end();) {
54 if (!*it || (strcmp(*it, "-L") && strcmp(*it, "--last"))) {
55 ++it;
56 } else {
57 it = argv_hold.erase(it);
58 }
59 }
60 // fall through to re-run the command regardless of the arguments
61 // passed in. For instance, we expect -h to report help stutter.
62 }
63
64 // Run logcat command without -L flag
65 int retval = android_logcat_run_command(ctx, -1, -1, argv_hold.size() - 1,
66 (char* const*)&argv_hold[0], envp);
67 if (!ret) ret = retval;
68 retval = android_logcat_destroy(&ctx);
69 if (!ret) ret = retval;
70 return ret;
71 }
72