1 /* 2 * util/log.h - logging service 3 * 4 * Copyright (c) 2007, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /** 37 * \file 38 * 39 * This file contains logging functions. 40 */ 41 42 #ifndef UTIL_LOG_H 43 #define UTIL_LOG_H 44 struct sldns_buffer; 45 46 /** 47 * verbosity value: 48 */ 49 enum verbosity_value { 50 /** 0 - no verbose messages */ 51 NO_VERBOSE = 0, 52 /** 1 - operational information */ 53 VERB_OPS, 54 /** 2 - detailed information */ 55 VERB_DETAIL, 56 /** 3 - query level information */ 57 VERB_QUERY, 58 /** 4 - algorithm level information */ 59 VERB_ALGO, 60 /** 5 - querier client information */ 61 VERB_CLIENT 62 }; 63 64 /** The global verbosity setting */ 65 extern enum verbosity_value verbosity; 66 67 /** 68 * log a verbose message, pass the level for this message. 69 * It has printf formatted arguments. No trailing newline is needed. 70 * @param level: verbosity level for this message, compared to global 71 * verbosity setting. 72 * @param format: printf-style format string. Arguments follow. 73 */ 74 void verbose(enum verbosity_value level, 75 const char* format, ...) ATTR_FORMAT(printf, 2, 3); 76 77 /** 78 * call this to initialize logging services. 79 * @param filename: if NULL stderr is used. 80 * @param use_syslog: set to true to ignore filename and use syslog(3). 81 * @param chrootdir: to which directory we have been chrooted, if any. 82 */ 83 void log_init(const char* filename, int use_syslog, const char* chrootdir); 84 85 /** 86 * Set logging to go to the specified file *. 87 * This setting does not affect the use_syslog setting. 88 * @param f: to that file, or pass NULL to disable logging. 89 */ 90 void log_file(FILE *f); 91 92 /** 93 * Init a thread (will print this number for the thread log entries). 94 * Must be called from the thread itself. If not called 0 is printed. 95 * @param num: number to print for this thread. Owned by caller, must 96 * continue to exist. 97 */ 98 void log_thread_set(int* num); 99 100 /** 101 * Set identity to print, default is 'unbound'. 102 * @param id: string to print. Name of executable. 103 */ 104 void log_ident_set(const char* id); 105 106 /** 107 * Set the time value to print in log entries. 108 * @param t: the point is copied and used to find the time. 109 * if NULL, time(2) is used. 110 */ 111 void log_set_time(time_t* t); 112 113 /** 114 * Set if the time value is printed ascii or decimal in log entries. 115 * @param use_asc: if true, ascii is printed, otherwise decimal. 116 * If the conversion fails or you have no time functions, 117 * decimal is printed. 118 */ 119 void log_set_time_asc(int use_asc); 120 121 /** 122 * Log informational message. 123 * Pass printf formatted arguments. No trailing newline is needed. 124 * @param format: printf-style format string. Arguments follow. 125 */ 126 void log_info(const char* format, ...) ATTR_FORMAT(printf, 1, 2); 127 128 /** 129 * Log error message. 130 * Pass printf formatted arguments. No trailing newline is needed. 131 * @param format: printf-style format string. Arguments follow. 132 */ 133 void log_err(const char* format, ...) ATTR_FORMAT(printf, 1, 2); 134 135 /** 136 * Log warning message. 137 * Pass printf formatted arguments. No trailing newline is needed. 138 * @param format: printf-style format string. Arguments follow. 139 */ 140 void log_warn(const char* format, ...) ATTR_FORMAT(printf, 1, 2); 141 142 /** 143 * Log a hex-string to the log. Can be any length. 144 * performs mallocs to do so, slow. But debug useful. 145 * @param msg: string desc to accompany the hexdump. 146 * @param data: data to dump in hex format. 147 * @param length: length of data. 148 */ 149 void log_hex(const char* msg, void* data, size_t length); 150 151 /** 152 * Easy alternative for log_hex, takes a sldns_buffer. 153 * @param level: verbosity level for this message, compared to global 154 * verbosity setting. 155 * @param msg: string desc to print 156 * @param buf: the buffer. 157 */ 158 void log_buf(enum verbosity_value level, const char* msg, struct sldns_buffer* buf); 159 160 /** 161 * Log fatal error message, and exit the current process. 162 * Pass printf formatted arguments. No trailing newline is needed. 163 * @param format: printf-style format string. Arguments follow. 164 */ 165 void fatal_exit(const char* format, ...) ATTR_FORMAT(printf, 1, 2); 166 167 /** 168 * va_list argument version of log_info. 169 * @param pri: priority type, for example 5 (INFO). 170 * @param type: string to designate type of message (info, error). 171 * @param format: the printf style format to print. no newline. 172 * @param args: arguments for format string. 173 */ 174 void log_vmsg(int pri, const char* type, const char* format, va_list args); 175 176 /** 177 * an assertion that is thrown to the logfile. 178 */ 179 #ifdef UNBOUND_DEBUG 180 # define log_assert(x) \ 181 do { if(!(x)) \ 182 fatal_exit("%s:%d: %s: assertion %s failed", \ 183 __FILE__, __LINE__, __func__, #x); \ 184 } while(0); 185 #else 186 # define log_assert(x) /*nothing*/ 187 #endif 188 189 #ifdef USE_WINSOCK 190 /** 191 * Convert WSA error into string. 192 * @param err: from WSAGetLastError() 193 * @return: string. 194 */ 195 char* wsa_strerror(DWORD err); 196 #endif /* USE_WINSOCK */ 197 198 #endif /* UTIL_LOG_H */ 199