syslog.c revision 1.56
1 /* $NetBSD: syslog.c,v 1.56 2017/01/12 00:38:01 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)syslog.c 8.5 (Berkeley) 4/29/95"; 36 #else 37 __RCSID("$NetBSD: syslog.c,v 1.56 2017/01/12 00:38:01 christos Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/socket.h> 45 #include <sys/syslog.h> 46 #include <sys/uio.h> 47 #include <sys/un.h> 48 #include <netdb.h> 49 50 #include <errno.h> 51 #include <stdio.h> 52 #include <fcntl.h> 53 #include <paths.h> 54 #include <stdarg.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <time.h> 59 #include <unistd.h> 60 61 #include "syslog_private.h" 62 #include "reentrant.h" 63 #include "extern.h" 64 65 #ifdef __weak_alias 66 __weak_alias(syslog,_syslog) 67 __weak_alias(vsyslog,_vsyslog) 68 __weak_alias(syslogp,_syslogp) 69 __weak_alias(vsyslogp,_vsyslogp) 70 #endif 71 72 static size_t 73 timefun(char *p, size_t tbuf_left) 74 { 75 struct timeval tv; 76 time_t now; 77 struct tm tmnow; 78 size_t prlen; 79 char *op = p; 80 81 if (gettimeofday(&tv, NULL) == -1) 82 return snprintf_ss(p, tbuf_left, "-"); 83 84 /* strftime() implies tzset(), localtime_r() doesn't. */ 85 tzset(); 86 now = (time_t) tv.tv_sec; 87 localtime_r(&now, &tmnow); 88 89 prlen = strftime(p, tbuf_left, "%FT%T", &tmnow); 90 DEC(); 91 prlen = snprintf(p, tbuf_left, ".%06ld", (long)tv.tv_usec); 92 DEC(); 93 prlen = strftime(p, tbuf_left-1, "%z", &tmnow); 94 /* strftime gives eg. "+0200", but we need "+02:00" */ 95 if (prlen == 5) { 96 p[prlen+1] = p[prlen]; 97 p[prlen] = p[prlen-1]; 98 p[prlen-1] = p[prlen-2]; 99 p[prlen-2] = ':'; 100 prlen += 1; 101 } 102 DEC(); 103 return (size_t)(p - op); 104 } 105 106 static struct syslog_fun _syslog_fun = { 107 timefun, 108 strerror_r, 109 #ifndef __lint__ 110 _vsnprintf, 111 #else 112 vsnprintf, 113 #endif 114 }; 115 116 /* 117 * syslog, vsyslog -- 118 * print message on log file; output is intended for syslogd(8). 119 */ 120 void 121 syslog(int pri, const char *fmt, ...) 122 { 123 va_list ap; 124 125 va_start(ap, fmt); 126 _vxsyslogp_r(pri, &_syslog_fun, &_syslog_data, NULL, NULL, fmt, ap); 127 va_end(ap); 128 } 129 130 void 131 vsyslog(int pri, const char *fmt, va_list ap) 132 { 133 _vxsyslogp_r(pri, &_syslog_fun, &_syslog_data, NULL, NULL, fmt, ap); 134 } 135 136 /* 137 * syslogp, vsyslogp -- 138 * like syslog but take additional arguments for MSGID and SD 139 */ 140 void 141 syslogp(int pri, const char *msgid, const char *sdfmt, const char *msgfmt, ...) 142 { 143 va_list ap; 144 145 va_start(ap, msgfmt); 146 _vxsyslogp_r(pri, &_syslog_fun, &_syslog_data, 147 msgid, sdfmt, msgfmt, ap); 148 va_end(ap); 149 } 150 151 void 152 vsyslogp(int pri, const char *msgid, const char *sdfmt, const char *msgfmt, 153 va_list ap) 154 { 155 _vxsyslogp_r(pri, &_syslog_fun, &_syslog_data, 156 msgid, sdfmt, msgfmt, ap); 157 } 158 159 void 160 vsyslogp_r(int pri, struct syslog_data *data, const char *msgid, 161 const char *sdfmt, const char *msgfmt, va_list ap) 162 { 163 _vxsyslogp_r(pri, &_syslog_fun, data, msgid, sdfmt, msgfmt, ap); 164 } 165 166 void 167 syslog_r(int pri, struct syslog_data *data, const char *fmt, ...) 168 { 169 va_list ap; 170 171 va_start(ap, fmt); 172 _vxsyslogp_r(pri, &_syslog_fun, data, NULL, NULL, fmt, ap); 173 va_end(ap); 174 } 175 176 void 177 syslogp_r(int pri, struct syslog_data *data, const char *msgid, 178 const char *sdfmt, const char *msgfmt, ...) 179 { 180 va_list ap; 181 182 va_start(ap, msgfmt); 183 _vxsyslogp_r(pri, &_syslog_fun, data, msgid, sdfmt, msgfmt, ap); 184 va_end(ap); 185 } 186 187 void 188 vsyslog_r(int pri, struct syslog_data *data, const char *fmt, va_list ap) 189 { 190 _vxsyslogp_r(pri, &_syslog_fun, data, NULL, NULL, fmt, ap); 191 } 192
Indexes created Mon Sep 22 05:09:51 GMT 2025