1 /* $OpenBSD: log.c,v 1.7 2005/03/31 12:14:01 henning 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 <errno.h> 20 #include <stdarg.h> 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <syslog.h> 25 #include <time.h> 26 27 #include "ntpd.h" 28 29 int debug; 30 31 void logit(int, const char *, ...); 32 33 void 34 log_init(int n_debug) 35 { 36 extern char *__progname; 37 38 debug = n_debug; 39 40 if (!debug) 41 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON); 42 43 tzset(); 44 } 45 46 void 47 logit(int pri, const char *fmt, ...) 48 { 49 va_list ap; 50 51 va_start(ap, fmt); 52 vlog(pri, fmt, ap); 53 va_end(ap); 54 } 55 56 void 57 vlog(int pri, const char *fmt, va_list ap) 58 { 59 char *nfmt; 60 61 if (debug) { 62 /* best effort in out of mem situations */ 63 if (asprintf(&nfmt, "%s\n", fmt) == -1) { 64 vfprintf(stderr, fmt, ap); 65 fprintf(stderr, "\n"); 66 } else { 67 vfprintf(stderr, nfmt, ap); 68 free(nfmt); 69 } 70 fflush(stderr); 71 } else 72 vsyslog(pri, fmt, ap); 73 } 74 75 76 void 77 log_warn(const char *emsg, ...) 78 { 79 char *nfmt; 80 va_list ap; 81 82 /* best effort to even work in out of memory situations */ 83 if (emsg == NULL) 84 logit(LOG_CRIT, "%s", strerror(errno)); 85 else { 86 va_start(ap, emsg); 87 88 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { 89 /* we tried it... */ 90 vlog(LOG_CRIT, emsg, ap); 91 logit(LOG_CRIT, "%s", strerror(errno)); 92 } else { 93 vlog(LOG_CRIT, nfmt, ap); 94 free(nfmt); 95 } 96 va_end(ap); 97 } 98 } 99 100 void 101 log_warnx(const char *emsg, ...) 102 { 103 va_list ap; 104 105 va_start(ap, emsg); 106 vlog(LOG_CRIT, emsg, ap); 107 va_end(ap); 108 } 109 110 void 111 log_info(const char *emsg, ...) 112 { 113 va_list ap; 114 115 va_start(ap, emsg); 116 vlog(LOG_INFO, emsg, ap); 117 va_end(ap); 118 } 119 120 void 121 log_debug(const char *emsg, ...) 122 { 123 va_list ap; 124 125 if (debug) { 126 va_start(ap, emsg); 127 vlog(LOG_DEBUG, emsg, ap); 128 va_end(ap); 129 } 130 } 131 132 void 133 fatal(const char *emsg) 134 { 135 if (emsg == NULL) 136 logit(LOG_CRIT, "fatal: %s", strerror(errno)); 137 else 138 if (errno) 139 logit(LOG_CRIT, "fatal: %s: %s", 140 emsg, strerror(errno)); 141 else 142 logit(LOG_CRIT, "fatal: %s", emsg); 143 144 exit(1); 145 } 146 147 void 148 fatalx(const char *emsg) 149 { 150 errno = 0; 151 fatal(emsg); 152 } 153 154 const char * 155 log_sockaddr(struct sockaddr *sa) 156 { 157 static char buf[NI_MAXHOST]; 158 159 if (getnameinfo(sa, SA_LEN(sa), buf, sizeof(buf), NULL, 0, 160 NI_NUMERICHOST)) 161 return ("(unknown)"); 162 else 163 return (buf); 164 } 165