1 /* $OpenBSD: log.c,v 1.3 2008/12/04 17:24:13 cloder 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/queue.h> 21 #include <sys/tree.h> 22 #include <sys/param.h> 23 #include <sys/socket.h> 24 #include <sys/time.h> 25 26 #include <errno.h> 27 #include <event.h> 28 #include <pwd.h> 29 #include <stdarg.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <syslog.h> 34 #include <time.h> 35 36 #include "smtpd.h" 37 38 int debug; 39 40 void vlog(int, const char *, va_list); 41 void logit(int, const char *, ...) 42 __attribute__ ((format (printf, 2, 3))); 43 44 45 void 46 log_init(int n_debug) 47 { 48 extern char *__progname; 49 50 debug = n_debug; 51 52 if (!debug) 53 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_MAIL); 54 55 tzset(); 56 } 57 58 void 59 logit(int pri, const char *fmt, ...) 60 { 61 va_list ap; 62 63 va_start(ap, fmt); 64 vlog(pri, fmt, ap); 65 va_end(ap); 66 } 67 68 void 69 vlog(int pri, const char *fmt, va_list ap) 70 { 71 char *nfmt; 72 73 if (debug) { 74 /* best effort in out of mem situations */ 75 if (asprintf(&nfmt, "%s\n", fmt) == -1) { 76 vfprintf(stderr, fmt, ap); 77 fprintf(stderr, "\n"); 78 } else { 79 vfprintf(stderr, nfmt, ap); 80 free(nfmt); 81 } 82 fflush(stderr); 83 } else 84 vsyslog(pri, fmt, ap); 85 } 86 87 88 void 89 log_warn(const char *emsg, ...) 90 { 91 char *nfmt; 92 va_list ap; 93 94 /* best effort to even work in out of memory situations */ 95 if (emsg == NULL) 96 logit(LOG_CRIT, "%s", strerror(errno)); 97 else { 98 va_start(ap, emsg); 99 100 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { 101 /* we tried it... */ 102 vlog(LOG_CRIT, emsg, ap); 103 logit(LOG_CRIT, "%s", strerror(errno)); 104 } else { 105 vlog(LOG_CRIT, nfmt, ap); 106 free(nfmt); 107 } 108 va_end(ap); 109 } 110 } 111 112 void 113 log_warnx(const char *emsg, ...) 114 { 115 va_list ap; 116 117 va_start(ap, emsg); 118 vlog(LOG_CRIT, emsg, ap); 119 va_end(ap); 120 } 121 122 void 123 log_info(const char *emsg, ...) 124 { 125 va_list ap; 126 127 va_start(ap, emsg); 128 vlog(LOG_INFO, emsg, ap); 129 va_end(ap); 130 } 131 132 void 133 log_debug(const char *emsg, ...) 134 { 135 va_list ap; 136 137 if (debug > 1) { 138 va_start(ap, emsg); 139 vlog(LOG_DEBUG, emsg, ap); 140 va_end(ap); 141 } 142 } 143 144 void 145 fatal(const char *emsg) 146 { 147 if (emsg == NULL) 148 logit(LOG_CRIT, "fatal: %s", strerror(errno)); 149 else 150 if (errno) 151 logit(LOG_CRIT, "fatal: %s: %s", 152 emsg, strerror(errno)); 153 else 154 logit(LOG_CRIT, "fatal: %s", emsg); 155 156 exit(1); 157 } 158 159 void 160 fatalx(const char *emsg) 161 { 162 errno = 0; 163 fatal(emsg); 164 } 165