1c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn/* 2c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * Copyright (C) 2005-2017 The Android Open Source Project 3c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 4c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * Licensed under the Apache License, Version 2.0 (the "License"); 5c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * you may not use this file except in compliance with the License. 6c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * You may obtain a copy of the License at 7c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 8c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * http://www.apache.org/licenses/LICENSE-2.0 9c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 10c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * Unless required by applicable law or agreed to in writing, software 11c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * distributed under the License is distributed on an "AS IS" BASIS, 12c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * See the License for the specific language governing permissions and 14c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * limitations under the License. 15c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn */ 16c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 17c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#ifndef _LIBS_LOGCAT_H /* header boilerplate */ 18c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#define _LIBS_LOGCAT_H 19c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 206dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn#include <stdio.h> 216dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn 22c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#ifdef __cplusplus 23c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzynextern "C" { 24c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#endif 25c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 26c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#ifndef __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 27c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#ifndef __ANDROID_API__ 28c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1 29c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#elif __ANDROID_API__ > 24 /* > Nougat */ 30c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 1 31c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#else 32c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#define __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 0 33c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#endif 34c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#endif 35c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 36c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#if __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE 37c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 38c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn/* For managing an in-process logcat function, rather than forking/execing 39c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 40c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * It also serves as the basis for the logcat command. 41c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 42c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * The following C API allows a logcat instance to be created, run 43c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * to completion, and then release all the associated resources. 44c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn */ 45c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 46c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn/* 47c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * The opaque context 48c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn */ 49c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#ifndef __android_logcat_context_defined /* typedef boilerplate */ 50c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#define __android_logcat_context_defined 51c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyntypedef struct android_logcat_context_internal* android_logcat_context; 52c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#endif 53c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 54c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn/* Creates a context associated with this logcat instance 55c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 56c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * Returns a pointer to the context, or a NULL on error. 57c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn */ 58c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzynandroid_logcat_context create_android_logcat(); 59c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 60c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn/* Collects and outputs the logcat data to output and error file descriptors 61c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 62c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * Will block, performed in-thread and in-process 63c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 64c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * The output file descriptor variable, if greater than or equal to 0, is 65c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * where the output (ie: stdout) will be sent. The file descriptor is closed 66c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * on android_logcat_destroy which terminates the instance, or when an -f flag 67c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * (output redirect to a file) is present in the command. The error file 68c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * descriptor variable, if greater than or equal to 0, is where the error 69c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * stream (ie: stderr) will be sent, also closed on android_logcat_destroy. 70c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * The error file descriptor can be set to equal to the output file descriptor, 71c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * which will mix output and error stream content, and will defer closure of 72c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * the file descriptor on -f flag redirection. Negative values for the file 73c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * descriptors will use stdout and stderr FILE references respectively 74c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * internally, and will not close the references as noted above. 75c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 76c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * Return value is 0 for success, non-zero for errors. 77c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn */ 78c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzynint android_logcat_run_command(android_logcat_context ctx, int output, int error, 79c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn int argc, char* const* argv, char* const* envp); 80c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 811d6928b7360217e788ab5255b5667828e092936aMark Salyzyn/* Will not block, performed in-process 821d6928b7360217e788ab5255b5667828e092936aMark Salyzyn * 831d6928b7360217e788ab5255b5667828e092936aMark Salyzyn * Starts a thread, opens a pipe, returns reading end fd, saves off argv. 841d6928b7360217e788ab5255b5667828e092936aMark Salyzyn * The command supports 2>&1 (mix content) and 2>/dev/null (drop content) for 851d6928b7360217e788ab5255b5667828e092936aMark Salyzyn * scripted error (stderr) redirection. 861d6928b7360217e788ab5255b5667828e092936aMark Salyzyn */ 871d6928b7360217e788ab5255b5667828e092936aMark Salyzynint android_logcat_run_command_thread(android_logcat_context ctx, int argc, 881d6928b7360217e788ab5255b5667828e092936aMark Salyzyn char* const* argv, char* const* envp); 891d6928b7360217e788ab5255b5667828e092936aMark Salyzynint android_logcat_run_command_thread_running(android_logcat_context ctx); 901d6928b7360217e788ab5255b5667828e092936aMark Salyzyn 91c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn/* Finished with context 92c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 931d6928b7360217e788ab5255b5667828e092936aMark Salyzyn * Kill the command thread ASAP (if any), and free up all associated resources. 94c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * 95c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * Return value is the result of the android_logcat_run_command, or 96c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn * non-zero for any errors. 97c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn */ 98c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzynint android_logcat_destroy(android_logcat_context* ctx); 99c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 1006dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn/* derived helpers */ 1016dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn 1026dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn/* 1036dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn * In-process thread that acts like somewhat like libc-like system and popen 1046dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn * respectively. Can not handle shell scripting, only pure calls to the 1056dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn * logcat operations. The android_logcat_system is a wrapper for the 1066dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn * create_android_logcat, android_logcat_run_command and android_logcat_destroy 1076dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn * API above. The android_logcat_popen is a wrapper for the 1086dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn * android_logcat_run_command_thread API above. The android_logcat_pclose is 1096dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn * a wrapper for a reasonable wait until output has subsided for command 1106dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn * completion, fclose on the FILE pointer and the android_logcat_destroy API. 1116dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn */ 1126dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzynint android_logcat_system(const char* command); 1136dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark SalyzynFILE* android_logcat_popen(android_logcat_context* ctx, const char* command); 1146dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzynint android_logcat_pclose(android_logcat_context* ctx, FILE* output); 1156dabc81a0b7eac772209e8eef70ff3b156e5cc6bMark Salyzyn 116c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#endif /* __ANDROID_USE_LIBLOG_LOGCAT_INTERFACE */ 117c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 118c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#ifdef __cplusplus 119c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn} 120c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#endif 121c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn 122c0cf90d1fb6aca1e6ae6c06d4d6231dd4d47d3cbMark Salyzyn#endif /* _LIBS_LOGCAT_H */ 123