1 /* 2 * Copyright 2008 Google Inc. All Rights Reserved. 3 * 4 * Author: md (at) google.com (Michael Davidson) 5 */ 6 7 #include <stdarg.h> 8 #include <stdio.h> 9 #include <stdlib.h> 10 #include <string.h> 11 12 #include "logging.h" 13 14 15 static FILE *log_fp = NULL; 16 static const char *program = ""; 17 static int debug = 0; 18 19 20 void set_log_file(FILE *fp) 21 { 22 log_fp = fp; 23 } 24 25 void set_program_name(const char *name) 26 { 27 program = name; 28 } 29 30 void set_debug_level(int level) 31 { 32 debug = level; 33 } 34 35 void msg(enum msg_type msg_type, int data, const char *fmt, ...) 36 { 37 va_list ap; 38 int err = 0; 39 const char *type = NULL; 40 41 /* 42 * default is to log to stdout 43 */ 44 if (!log_fp) 45 log_fp = stdout; 46 47 switch (msg_type) { 48 case MSG_DEBUG: 49 if (data > debug) 50 return; 51 type = "DEBUG"; 52 break; 53 case MSG_INFO: 54 type = "INFO"; 55 break; 56 case MSG_WARN: 57 type = "WARN"; 58 break; 59 case MSG_ERROR: 60 type = "ERROR"; 61 err = data; 62 break; 63 case MSG_FATAL: 64 type = "FATAL"; 65 err = data; 66 break; 67 } 68 69 va_start(ap, fmt); 70 71 if (type) 72 fprintf(log_fp, "%s: ", type); 73 74 if (program) 75 fprintf(log_fp, "%s: ", program); 76 77 vfprintf(log_fp, fmt, ap); 78 79 if (err) { 80 fprintf(log_fp, ": %s\n", strerror(err)); 81 } else { 82 fputc('\n', log_fp); 83 } 84 85 va_end(ap); 86 87 if (msg_type == MSG_FATAL) 88 exit(EXIT_FAILURE); 89 } 90
