1/* 2 * Copyright (c) 1999-2013 Apple Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23 24/* 25 * Copyright (c) 1993 26 * The Regents of the University of California. All rights reserved. 27 * 28 * Redistribution and use in source and binary forms, with or without 29 * modification, are permitted provided that the following conditions 30 * are met: 31 * 1. Redistributions of source code must retain the above copyright 32 * notice, this list of conditions and the following disclaimer. 33 * 2. Redistributions in binary form must reproduce the above copyright 34 * notice, this list of conditions and the following disclaimer in the 35 * documentation and/or other materials provided with the distribution. 36 * 3. All advertising materials mentioning features or use of this software 37 * must display the following acknowledgement: 38 * This product includes software developed by the University of 39 * California, Berkeley and its contributors. 40 * 4. Neither the name of the University nor the names of its contributors 41 * may be used to endorse or promote products derived from this software 42 * without specific prior written permission. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54 * SUCH DAMAGE. 55 */ 56 57#include <stdio.h> 58 59#include <sys/syslog.h> 60#include <stdlib.h> 61#include <string.h> 62#include <stdint.h> 63#include <pthread.h> 64#include <dispatch/dispatch.h> 65#include <asl.h> 66#include <asl_msg.h> 67#include <asl_private.h> 68 69#ifdef __STDC__ 70#include <stdarg.h> 71#else 72#include <varargs.h> 73#endif 74 75#define LOG_NO_NOTIFY 0x1000 76extern const char *asl_syslog_faciliy_num_to_name(int n); 77 78#ifdef BUILDING_VARIANT 79__private_extern__ pthread_mutex_t _sl_lock; 80__private_extern__ aslclient _sl_asl; 81__private_extern__ char *_sl_ident; 82__private_extern__ int _sl_fac; 83__private_extern__ int _sl_opts; 84__private_extern__ int _sl_mask; 85#else /* !BUILDING_VARIANT */ 86__private_extern__ pthread_mutex_t _sl_lock = PTHREAD_MUTEX_INITIALIZER; 87__private_extern__ aslclient _sl_asl = NULL; 88__private_extern__ char *_sl_ident = NULL; 89__private_extern__ int _sl_fac = 0; 90__private_extern__ int _sl_opts = 0; 91__private_extern__ int _sl_mask = 0; 92#endif /* BUILDING_VARIANT */ 93 94/* 95 * syslog, vsyslog -- 96 * print message on log file; output is intended for syslogd(8). 97 */ 98void 99#ifdef __STDC__ 100syslog(int pri, const char *fmt, ...) 101#else 102syslog(pri, fmt, va_alist) 103 int pri; 104 char *fmt; 105 va_dcl 106#endif 107{ 108 va_list ap; 109 110#ifdef __STDC__ 111 va_start(ap, fmt); 112#else 113 va_start(ap); 114#endif 115 vsyslog(pri, fmt, ap); 116 va_end(ap); 117} 118 119void 120vsyslog(int pri, const char *fmt, va_list ap) 121{ 122 int fac; 123 asl_msg_t *facmsg; 124 const char *facility; 125 126 facmsg = NULL; 127 fac = pri & LOG_FACMASK; 128 if (fac != 0) 129 { 130 facility = asl_syslog_faciliy_num_to_name(fac); 131 if (facility != NULL) 132 { 133 facmsg = asl_msg_new(ASL_TYPE_MSG); 134 asl_msg_set_key_val(facmsg, ASL_KEY_FACILITY, facility); 135 } 136 } 137 138 pthread_mutex_lock(&_sl_lock); 139 140 /* open syslog ASL client if required */ 141 if (_sl_asl == NULL) 142 { 143 _sl_asl = asl_open(NULL, NULL, ASL_OPT_SYSLOG_LEGACY); 144 _sl_mask = ASL_FILTER_MASK_UPTO(ASL_LEVEL_DEBUG); 145 asl_set_filter(_sl_asl, _sl_mask); 146 } 147 148 asl_vlog(_sl_asl, (aslmsg)facmsg, LOG_PRI(pri), fmt, ap); 149 150 pthread_mutex_unlock(&_sl_lock); 151 152 if (facmsg != NULL) asl_msg_release(facmsg); 153} 154 155#ifndef BUILDING_VARIANT 156 157void 158openlog(const char *ident, int opts, int logfac) 159{ 160 const char *facility; 161 uint32_t asl_opts; 162 163 pthread_mutex_lock(&_sl_lock); 164 165 if (_sl_asl != NULL) asl_close(_sl_asl); 166 _sl_asl = NULL; 167 168 free(_sl_ident); 169 _sl_ident = NULL; 170 171 /* open with specified parameters */ 172 173 if (ident != NULL) _sl_ident = strdup(ident); 174 /* NB we allow the strdup to fail silently */ 175 176 _sl_fac = logfac; 177 facility = asl_syslog_faciliy_num_to_name(_sl_fac); 178 179 _sl_opts = opts; 180 asl_opts = ASL_OPT_SYSLOG_LEGACY; 181 182 if (_sl_opts & LOG_NO_NOTIFY) asl_opts |= ASL_OPT_NO_REMOTE; 183 if (_sl_opts & LOG_PERROR) asl_opts |= ASL_OPT_STDERR; 184 185 _sl_mask = ASL_FILTER_MASK_UPTO(ASL_LEVEL_DEBUG); 186 187 _sl_asl = asl_open(_sl_ident, facility, asl_opts); 188 asl_set_filter(_sl_asl, _sl_mask); 189 190 pthread_mutex_unlock(&_sl_lock); 191} 192 193void 194closelog() 195{ 196 pthread_mutex_lock(&_sl_lock); 197 198 if (_sl_asl != NULL) asl_close(_sl_asl); 199 _sl_asl = NULL; 200 201 free(_sl_ident); 202 _sl_ident = NULL; 203 204 pthread_mutex_unlock(&_sl_lock); 205} 206 207/* setlogmask -- set the log mask level */ 208int 209setlogmask(int mask) 210{ 211 int oldmask; 212 213 if (mask == 0) return _sl_mask; 214 215 pthread_mutex_lock(&_sl_lock); 216 217 _sl_mask = mask; 218 oldmask = asl_set_filter(_sl_asl, mask); 219 if (_sl_opts & LOG_PERROR) asl_set_output_file_filter(_sl_asl, STDERR_FILENO, mask); 220 221 pthread_mutex_unlock(&_sl_lock); 222 223 return oldmask; 224} 225 226#endif /* !BUILDING_VARIANT */ 227