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 <log/logcat.h> 25 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
