1 /* $OpenBSD: log.c,v 1.12 2015/12/11 18:49:39 nicm Exp $ */ 2 3 /* 4 * log.c 5 * 6 * Based on err.c, which was adapted from OpenBSD libc *err* *warn* code. 7 * 8 * Copyright (c) 2005 Nick Mathewson <nickm@freehaven.net> 9 * 10 * Copyright (c) 2000 Dug Song <dugsong@monkey.org> 11 * 12 * Copyright (c) 1993 13 * The Regents of the University of California. All rights reserved. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #include <sys/types.h> 41 #include <sys/time.h> 42 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <stdarg.h> 46 #include <string.h> 47 #include <errno.h> 48 49 #include "event.h" 50 #include "log.h" 51 52 static void _warn_helper(int severity, int log_errno, const char *fmt, 53 va_list ap); 54 static void event_log(int severity, const char *msg); 55 56 void 57 event_err(int eval, const char *fmt, ...) 58 { 59 va_list ap; 60 61 va_start(ap, fmt); 62 _warn_helper(_EVENT_LOG_ERR, errno, fmt, ap); 63 va_end(ap); 64 exit(eval); 65 } 66 67 void 68 event_warn(const char *fmt, ...) 69 { 70 va_list ap; 71 72 va_start(ap, fmt); 73 _warn_helper(_EVENT_LOG_WARN, errno, fmt, ap); 74 va_end(ap); 75 } 76 77 void 78 event_errx(int eval, const char *fmt, ...) 79 { 80 va_list ap; 81 82 va_start(ap, fmt); 83 _warn_helper(_EVENT_LOG_ERR, -1, fmt, ap); 84 va_end(ap); 85 exit(eval); 86 } 87 88 void 89 event_warnx(const char *fmt, ...) 90 { 91 va_list ap; 92 93 va_start(ap, fmt); 94 _warn_helper(_EVENT_LOG_WARN, -1, fmt, ap); 95 va_end(ap); 96 } 97 98 void 99 event_msgx(const char *fmt, ...) 100 { 101 va_list ap; 102 103 va_start(ap, fmt); 104 _warn_helper(_EVENT_LOG_MSG, -1, fmt, ap); 105 va_end(ap); 106 } 107 108 void 109 _event_debugx(const char *fmt, ...) 110 { 111 va_list ap; 112 113 va_start(ap, fmt); 114 _warn_helper(_EVENT_LOG_DEBUG, -1, fmt, ap); 115 va_end(ap); 116 } 117 118 static void 119 _warn_helper(int severity, int log_errno, const char *fmt, va_list ap) 120 { 121 char buf[1024]; 122 size_t len; 123 124 if (fmt != NULL) 125 vsnprintf(buf, sizeof(buf), fmt, ap); 126 else 127 buf[0] = '\0'; 128 129 if (log_errno >= 0) { 130 len = strlen(buf); 131 if (len < sizeof(buf) - 3) { 132 snprintf(buf + len, sizeof(buf) - len, ": %s", 133 strerror(log_errno)); 134 } 135 } 136 137 event_log(severity, buf); 138 } 139 140 static event_log_cb log_fn = NULL; 141 142 void 143 event_set_log_callback(event_log_cb cb) 144 { 145 log_fn = cb; 146 } 147 148 static void 149 event_log(int severity, const char *msg) 150 { 151 if (log_fn) 152 log_fn(severity, msg); 153 } 154