1/* 2 * Copyright (C) 2007 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 18#include <stdlib.h> 19#include <stdio.h> 20#include <unistd.h> 21#include <string.h> 22#include <fcntl.h> 23#include <errno.h> 24#include <sys/socket.h> 25#include <cutils/logger.h> 26#include "sysdeps.h" 27#include "adb.h" 28 29#define LOG_FILE_DIR "/dev/log/" 30 31void write_log_entry(int fd, struct logger_entry *buf); 32 33void log_service(int fd, void *cookie) 34{ 35 /* get the name of the log filepath to read */ 36 char * log_filepath = cookie; 37 38 /* open the log file. */ 39 int logfd = unix_open(log_filepath, O_RDONLY); 40 if (logfd < 0) { 41 goto done; 42 } 43 44 // temp buffer to read the entries 45 unsigned char buf[LOGGER_ENTRY_MAX_LEN + 1] __attribute__((aligned(4))); 46 struct logger_entry *entry = (struct logger_entry *) buf; 47 48 while (1) { 49 int ret; 50 51 ret = unix_read(logfd, entry, LOGGER_ENTRY_MAX_LEN); 52 if (ret < 0) { 53 if (errno == EINTR || errno == EAGAIN) 54 continue; 55 // perror("logcat read"); 56 goto done; 57 } 58 else if (!ret) { 59 // fprintf(stderr, "read: Unexpected EOF!\n"); 60 goto done; 61 } 62 63 /* NOTE: driver guarantees we read exactly one full entry */ 64 65 entry->msg[entry->len] = '\0'; 66 67 write_log_entry(fd, entry); 68 } 69 70done: 71 unix_close(fd); 72 free(log_filepath); 73} 74 75/* returns the full path to the log file in a newly allocated string */ 76char * get_log_file_path(const char * log_name) { 77 char *log_device = malloc(strlen(LOG_FILE_DIR) + strlen(log_name) + 1); 78 79 strcpy(log_device, LOG_FILE_DIR); 80 strcat(log_device, log_name); 81 82 return log_device; 83} 84 85 86/* prints one log entry into the file descriptor fd */ 87void write_log_entry(int fd, struct logger_entry *buf) 88{ 89 size_t size = sizeof(struct logger_entry) + buf->len; 90 91 writex(fd, buf, size); 92} 93