1 /* 2 * Driver for USB Audio Device Class devices. 3 * Copyright (c) 2009-13 S.Zharski <imker@gmx.li> 4 * Distributed under the terms of the MIT license. 5 * 6 */ 7 8 9 #include "Settings.h" 10 11 #include <stdio.h> 12 #include <stdlib.h> 13 #include <string.h> 14 15 #include <driver_settings.h> 16 #include <lock.h> 17 18 #include "Driver.h" 19 20 21 uint32 gTraceMask = ERR; 22 bool gTruncateLogFile = false; 23 bool gAddTimeStamp = true; 24 static char* gLogFilePath = NULL; 25 mutex gLogLock; 26 27 static 28 void create_log() 29 { 30 if (gLogFilePath == NULL) 31 return; 32 33 int flags = O_WRONLY | O_CREAT | ((gTruncateLogFile) ? O_TRUNC : 0); 34 int fd = open(gLogFilePath, flags, 0666); 35 if (fd >= 0) 36 close(fd); 37 38 mutex_init(&gLogLock, DRIVER_NAME"-logging"); 39 } 40 41 42 void load_settings() 43 { 44 void* handle = load_driver_settings(DRIVER_NAME); 45 if (handle == 0) 46 return; 47 48 gTraceMask = strtoul(get_driver_parameter(handle, "trace", "1", "0"), 0, 0); 49 gTruncateLogFile = get_driver_boolean_parameter(handle, "truncate_logfile", 50 gTruncateLogFile, true); 51 gAddTimeStamp = get_driver_boolean_parameter(handle, "add_timestamp", 52 gAddTimeStamp, true); 53 const char* logFilePath = get_driver_parameter(handle, "logfile", 54 NULL, "/var/log/"DRIVER_NAME".log"); 55 if (logFilePath != NULL) 56 gLogFilePath = strdup(logFilePath); 57 58 unload_driver_settings(handle); 59 60 create_log(); 61 } 62 63 64 void release_settings() 65 { 66 if (gLogFilePath != NULL) { 67 mutex_destroy(&gLogLock); 68 free(gLogFilePath); 69 } 70 } 71 72 73 void usb_audio_trace(uint32 bits, const char* func, const char* fmt, ...) 74 { 75 if ((gTraceMask & bits) == 0) 76 return; 77 78 va_list arg_list; 79 static const char* prefix = DRIVER_NAME":"; 80 static char buffer[1024]; 81 char* buf_ptr = buffer; 82 if (gLogFilePath == NULL) { 83 strlcpy(buffer, prefix, sizeof(buffer)); 84 buf_ptr += strlen(prefix); 85 } 86 87 if (gAddTimeStamp) { 88 bigtime_t time = system_time(); 89 uint32 msec = time / 1000; 90 uint32 sec = msec / 1000; 91 sprintf(buf_ptr, "%02ld.%02ld.%03ld:", 92 sec / 60, sec % 60, msec % 1000); 93 buf_ptr += strlen(buf_ptr); 94 } 95 96 if (func != NULL) { 97 sprintf(buf_ptr, "%s::", func); 98 buf_ptr += strlen(buf_ptr); 99 } 100 101 va_start(arg_list, fmt); 102 vsprintf(buf_ptr, fmt, arg_list); 103 va_end(arg_list); 104 105 if (gLogFilePath == NULL) { 106 dprintf(buffer); 107 return; 108 } 109 110 mutex_lock(&gLogLock); 111 int fd = open(gLogFilePath, O_WRONLY | O_APPEND); 112 if (fd >= 0) { 113 write(fd, buffer, strlen(buffer)); 114 close(fd); 115 } 116 mutex_unlock(&gLogLock); 117 } 118 119