1 /* $OpenBSD: log.c,v 1.9 2014/11/03 20:15:30 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 <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 extern int debugsyslog; 31 32 void 33 log_init(int n_debug) 34 { 35 extern char *__progname; 36 37 debug = n_debug; 38 39 if (!debug) 40 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON); 41 42 tzset(); 43 } 44 45 void 46 logit(int pri, const char *fmt, ...) 47 { 48 va_list ap; 49 50 va_start(ap, fmt); 51 vlog(pri, fmt, ap); 52 va_end(ap); 53 } 54 55 void 56 vlog(int pri, const char *fmt, va_list ap) 57 { 58 char *nfmt; 59 60 if (debug) { 61 /* best effort in out of mem situations */ 62 if (asprintf(&nfmt, "%s\n", fmt) == -1) { 63 vfprintf(stderr, fmt, ap); 64 fprintf(stderr, "\n"); 65 } else { 66 vfprintf(stderr, nfmt, ap); 67 free(nfmt); 68 } 69 fflush(stderr); 70 } else 71 vsyslog(pri, fmt, ap); 72 } 73 74 75 void 76 log_warn(const char *emsg, ...) 77 { 78 char *nfmt; 79 va_list ap; 80 81 /* best effort to even work in out of memory situations */ 82 if (emsg == NULL) 83 logit(LOG_CRIT, "%s", strerror(errno)); 84 else { 85 va_start(ap, emsg); 86 87 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { 88 /* we tried it... */ 89 vlog(LOG_CRIT, emsg, ap); 90 logit(LOG_CRIT, "%s", strerror(errno)); 91 } else { 92 vlog(LOG_CRIT, nfmt, ap); 93 free(nfmt); 94 } 95 va_end(ap); 96 } 97 } 98 99 void 100 log_warnx(const char *emsg, ...) 101 { 102 va_list ap; 103 104 va_start(ap, emsg); 105 vlog(LOG_CRIT, emsg, ap); 106 va_end(ap); 107 } 108 109 void 110 log_info(const char *emsg, ...) 111 { 112 va_list ap; 113 114 va_start(ap, emsg); 115 vlog(LOG_INFO, emsg, ap); 116 va_end(ap); 117 } 118 119 void 120 log_debug(const char *emsg, ...) 121 { 122 va_list ap; 123 124 if (debug || debugsyslog) { 125 va_start(ap, emsg); 126 vlog(LOG_DEBUG, emsg, ap); 127 va_end(ap); 128 } 129 } 130 131 void 132 fatal(const char *emsg) 133 { 134 if (emsg == NULL) 135 logit(LOG_CRIT, "fatal: %s", strerror(errno)); 136 else 137 if (errno) 138 logit(LOG_CRIT, "fatal: %s: %s", 139 emsg, strerror(errno)); 140 else 141 logit(LOG_CRIT, "fatal: %s", emsg); 142 143 exit(1); 144 } 145 146 void 147 fatalx(const char *emsg) 148 { 149 errno = 0; 150 fatal(emsg); 151 } 152 153 const char * 154 log_sockaddr(struct sockaddr *sa) 155 { 156 static char buf[NI_MAXHOST]; 157 158 if (getnameinfo(sa, SA_LEN(sa), buf, sizeof(buf), NULL, 0, 159 NI_NUMERICHOST)) 160 return ("(unknown)"); 161 else 162 return (buf); 163 } 164