1/* 2 * Copyright (c) 1999-2010 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 <sys/syslog.h> 58#include <stdlib.h> 59#include <string.h> 60#include <stdint.h> 61#include <pthread.h> 62#include <dispatch/dispatch.h> 63#include <asl.h> 64#include "asl_private.h" 65 66#ifdef __STDC__ 67#include <stdarg.h> 68#else 69#include <varargs.h> 70#endif 71 72#define LOG_NO_NOTIFY 0x1000 73extern const char *asl_syslog_faciliy_num_to_name(int n); 74 75#ifdef BUILDING_VARIANT 76__private_extern__ pthread_mutex_t _sl_lock; 77__private_extern__ aslclient _sl_asl; 78__private_extern__ char *_sl_ident; 79__private_extern__ int _sl_fac; 80__private_extern__ int _sl_opts; 81__private_extern__ int _sl_mask; 82#else /* !BUILDING_VARIANT */ 83__private_extern__ pthread_mutex_t _sl_lock = PTHREAD_MUTEX_INITIALIZER; 84__private_extern__ aslclient _sl_asl = NULL; 85__private_extern__ char *_sl_ident = NULL; 86__private_extern__ int _sl_fac = 0; 87__private_extern__ int _sl_opts = 0; 88__private_extern__ int _sl_mask = 0; 89#endif /* BUILDING_VARIANT */ 90 91/* 92 * syslog, vsyslog -- 93 * print message on log file; output is intended for syslogd(8). 94 */ 95void 96#ifdef __STDC__ 97syslog(int pri, const char *fmt, ...) 98#else 99syslog(pri, fmt, va_alist) 100 int pri; 101 char *fmt; 102 va_dcl 103#endif 104{ 105 va_list ap; 106 107#ifdef __STDC__ 108 va_start(ap, fmt); 109#else 110 va_start(ap); 111#endif 112 vsyslog(pri, fmt, ap); 113 va_end(ap); 114} 115 116void 117vsyslog(int pri, const char *fmt, va_list ap) 118{ 119 int fac; 120 aslmsg facmsg; 121 const char *facility; 122 123 facmsg = NULL; 124 fac = pri & LOG_FACMASK; 125 if (fac != 0) 126 { 127 facility = asl_syslog_faciliy_num_to_name(fac); 128 if (facility != NULL) 129 { 130 facmsg = asl_new(ASL_TYPE_MSG); 131 asl_set(facmsg, ASL_KEY_FACILITY, facility); 132 } 133 } 134 135 pthread_mutex_lock(&_sl_lock); 136 137 /* open syslog ASL client if required */ 138 if (_sl_asl == NULL) 139 { 140 _sl_asl = asl_open(NULL, NULL, ASL_OPT_SYSLOG_LEGACY); 141 _sl_mask = ASL_FILTER_MASK_UPTO(ASL_LEVEL_DEBUG); 142 asl_set_filter(_sl_asl, _sl_mask); 143 } 144 145 asl_vlog(_sl_asl, facmsg, LOG_PRI(pri), fmt, ap); 146 147 pthread_mutex_unlock(&_sl_lock); 148 149 if (facmsg != NULL) asl_free(facmsg); 150} 151 152#ifndef BUILDING_VARIANT 153 154void 155openlog(const char *ident, int opts, int logfac) 156{ 157 const char *facility; 158 uint32_t asl_opts; 159 160 pthread_mutex_lock(&_sl_lock); 161 162 /* close existing aslclient */ 163 asl_close(_sl_asl); 164 _sl_asl = NULL; 165 166 free(_sl_ident); 167 _sl_ident = NULL; 168 169 /* open with specified parameters */ 170 171 if (ident != NULL) _sl_ident = strdup(ident); 172 /* NB we allow the strdup to fail silently */ 173 174 _sl_fac = logfac; 175 facility = asl_syslog_faciliy_num_to_name(_sl_fac); 176 177 _sl_opts = opts; 178 asl_opts = ASL_OPT_SYSLOG_LEGACY; 179 180 if (_sl_opts & LOG_NO_NOTIFY) asl_opts |= ASL_OPT_NO_REMOTE; 181 if (_sl_opts & LOG_PERROR) asl_opts |= ASL_OPT_STDERR; 182 183 _sl_mask = ASL_FILTER_MASK_UPTO(ASL_LEVEL_DEBUG); 184 185 _sl_asl = asl_open(_sl_ident, facility, asl_opts); 186 asl_set_filter(_sl_asl, _sl_mask); 187 188 pthread_mutex_unlock(&_sl_lock); 189} 190 191void 192closelog() 193{ 194 pthread_mutex_lock(&_sl_lock); 195 196 if (_sl_asl != NULL) asl_close(_sl_asl); 197 _sl_asl = NULL; 198 199 if (_sl_ident != NULL) free(_sl_ident); 200 _sl_ident = NULL; 201 202 pthread_mutex_unlock(&_sl_lock); 203} 204 205/* setlogmask -- set the log mask level */ 206int 207setlogmask(int mask) 208{ 209 int oldmask; 210 211 if (mask == 0) return _sl_mask; 212 213 pthread_mutex_lock(&_sl_lock); 214 215 _sl_mask = mask; 216 oldmask = asl_set_filter(_sl_asl, mask); 217 218 pthread_mutex_unlock(&_sl_lock); 219 220 return oldmask; 221} 222 223#endif /* !BUILDING_VARIANT */ 224