1/* $OpenBSD: log.c,v 1.4 2017/03/21 12:06:56 bluhm Exp $ */ 2 3/* 4 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19#include <sys/types.h> 20#include <sys/socket.h> 21#include <netinet/in.h> 22 23#include <errno.h> 24#include <netdb.h> 25#include <stdarg.h> 26#include <stdio.h> 27#include <stdlib.h> 28#include <string.h> 29#include <syslog.h> 30#include <time.h> 31 32#include "debugutil.h" 33#include "log.h" 34 35int debug; 36extern int debugsyslog; 37 38void 39log_init(int n_debug) 40{ 41 extern char *__progname; 42 43 debug = n_debug; 44 45 if (!debug) 46 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON); 47 48 tzset(); 49} 50 51void 52logit(int pri, const char *fmt, ...) 53{ 54 va_list ap; 55 56 va_start(ap, fmt); 57 vlog(pri, fmt, ap); 58 va_end(ap); 59} 60 61void 62vlog(int pri, const char *fmt, va_list ap) 63{ 64 vlog_printf(pri, fmt, ap); 65} 66 67 68void 69log_warn(const char *emsg, ...) 70{ 71 char *nfmt; 72 va_list ap; 73 74 /* best effort to even work in out of memory situations */ 75 if (emsg == NULL) 76 logit(LOG_ERR, "%s", strerror(errno)); 77 else { 78 va_start(ap, emsg); 79 80 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { 81 /* we tried it... */ 82 vlog(LOG_ERR, emsg, ap); 83 logit(LOG_ERR, "%s", strerror(errno)); 84 } else { 85 vlog(LOG_ERR, nfmt, ap); 86 free(nfmt); 87 } 88 va_end(ap); 89 } 90} 91 92void 93log_warnx(const char *emsg, ...) 94{ 95 va_list ap; 96 97 va_start(ap, emsg); 98 vlog(LOG_ERR, emsg, ap); 99 va_end(ap); 100} 101 102void 103log_info(const char *emsg, ...) 104{ 105 va_list ap; 106 107 va_start(ap, emsg); 108 vlog(LOG_INFO, emsg, ap); 109 va_end(ap); 110} 111 112void 113log_debug(const char *emsg, ...) 114{ 115 va_list ap; 116 117 if (debug || debugsyslog) { 118 va_start(ap, emsg); 119 vlog(LOG_DEBUG, emsg, ap); 120 va_end(ap); 121 } 122} 123 124void 125fatal(const char *emsg) 126{ 127 if (emsg == NULL) 128 logit(LOG_CRIT, "fatal: %s", strerror(errno)); 129 else 130 if (errno) 131 logit(LOG_CRIT, "fatal: %s: %s", 132 emsg, strerror(errno)); 133 else 134 logit(LOG_CRIT, "fatal: %s", emsg); 135 136 exit(1); 137} 138 139void 140fatalx(const char *emsg) 141{ 142 errno = 0; 143 fatal(emsg); 144} 145