1 /* $OpenBSD: log.c,v 1.1 2008/06/26 15:10:01 pyr Exp $ */ 2 /* $FreeBSD$ */ 3 4 /* 5 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 16 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 17 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 22 #include <errno.h> 23 #include <stdarg.h> 24 #include <stdio.h> 25 #include <stdlib.h> 26 #include <string.h> 27 #include <syslog.h> 28 #include <time.h> 29 30 void log_init(int); 31 void log_warn(const char *, ...); 32 void log_warnx(const char *, ...); 33 void log_info(const char *, ...); 34 void log_debug(const char *, ...); 35 __dead2 void fatal(const char *); 36 __dead2 void fatalx(const char *); 37 38 int debug; 39 40 void vlog(int, const char *, va_list); 41 void logit(int, const char *, ...); 42 43 void 44 log_init(int n_debug) 45 { 46 extern char *__progname; 47 48 debug = n_debug; 49 50 if (!debug) 51 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON); 52 53 tzset(); 54 } 55 56 void 57 logit(int pri, const char *fmt, ...) 58 { 59 va_list ap; 60 61 va_start(ap, fmt); 62 vlog(pri, fmt, ap); 63 va_end(ap); 64 } 65 66 void 67 vlog(int pri, const char *fmt, va_list ap) 68 { 69 char *nfmt; 70 71 if (debug) { 72 /* best effort in out of mem situations */ 73 if (asprintf(&nfmt, "%s\n", fmt) == -1) { 74 vfprintf(stderr, fmt, ap); 75 fprintf(stderr, "\n"); 76 } else { 77 vfprintf(stderr, nfmt, ap); 78 free(nfmt); 79 } 80 fflush(stderr); 81 } else 82 vsyslog(pri, fmt, ap); 83 } 84 85 86 void 87 log_warn(const char *emsg, ...) 88 { 89 char *nfmt; 90 va_list ap; 91 92 /* best effort to even work in out of memory situations */ 93 if (emsg == NULL) 94 logit(LOG_CRIT, "%s", strerror(errno)); 95 else { 96 va_start(ap, emsg); 97 98 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { 99 /* we tried it... */ 100 vlog(LOG_CRIT, emsg, ap); 101 logit(LOG_CRIT, "%s", strerror(errno)); 102 } else { 103 vlog(LOG_CRIT, nfmt, ap); 104 free(nfmt); 105 } 106 va_end(ap); 107 } 108 } 109 110 void 111 log_warnx(const char *emsg, ...) 112 { 113 va_list ap; 114 115 va_start(ap, emsg); 116 vlog(LOG_CRIT, emsg, ap); 117 va_end(ap); 118 } 119 120 void 121 log_info(const char *emsg, ...) 122 { 123 va_list ap; 124 125 va_start(ap, emsg); 126 vlog(LOG_INFO, emsg, ap); 127 va_end(ap); 128 } 129 130 void 131 log_debug(const char *emsg, ...) 132 { 133 va_list ap; 134 135 if (debug > 1) { 136 va_start(ap, emsg); 137 vlog(LOG_DEBUG, emsg, ap); 138 va_end(ap); 139 } 140 } 141 142 void 143 fatal(const char *emsg) 144 { 145 if (emsg == NULL) 146 logit(LOG_CRIT, "fatal: %s", strerror(errno)); 147 else 148 if (errno) 149 logit(LOG_CRIT, "fatal: %s: %s", 150 emsg, strerror(errno)); 151 else 152 logit(LOG_CRIT, "fatal: %s", emsg); 153 154 exit(1); 155 } 156 157 void 158 fatalx(const char *emsg) 159 { 160 errno = 0; 161 fatal(emsg); 162 } 163