1 /* $OpenBSD: log.c,v 1.1 2008/06/26 15:10:01 pyr 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 21 #include <errno.h> 22 #include <stdarg.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 #include <syslog.h> 27 28 void log_init(int); 29 void log_warn(const char *, ...); 30 void log_warnx(const char *, ...); 31 void log_info(const char *, ...); 32 void log_debug(const char *, ...); 33 __dead void fatal(const char *); 34 __dead void fatalx(const char *); 35 36 int debug; 37 38 void vlog(int, const char *, va_list); 39 void logit(int, const char *, ...); 40 41 void 42 log_init(int n_debug) 43 { 44 extern char *__progname; 45 46 debug = n_debug; 47 48 if (!debug) 49 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON); 50 51 tzset(); 52 } 53 54 void 55 logit(int pri, const char *fmt, ...) 56 { 57 va_list ap; 58 59 va_start(ap, fmt); 60 vlog(pri, fmt, ap); 61 va_end(ap); 62 } 63 64 void 65 vlog(int pri, const char *fmt, va_list ap) 66 { 67 char *nfmt; 68 69 if (debug) { 70 /* best effort in out of mem situations */ 71 if (asprintf(&nfmt, "%s\n", fmt) == -1) { 72 vfprintf(stderr, fmt, ap); 73 fprintf(stderr, "\n"); 74 } else { 75 vfprintf(stderr, nfmt, ap); 76 free(nfmt); 77 } 78 fflush(stderr); 79 } else 80 vsyslog(pri, fmt, ap); 81 } 82 83 84 void 85 log_warn(const char *emsg, ...) 86 { 87 char *nfmt; 88 va_list ap; 89 90 /* best effort to even work in out of memory situations */ 91 if (emsg == NULL) 92 logit(LOG_CRIT, "%s", strerror(errno)); 93 else { 94 va_start(ap, emsg); 95 96 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { 97 /* we tried it... */ 98 vlog(LOG_CRIT, emsg, ap); 99 logit(LOG_CRIT, "%s", strerror(errno)); 100 } else { 101 vlog(LOG_CRIT, nfmt, ap); 102 free(nfmt); 103 } 104 va_end(ap); 105 } 106 } 107 108 void 109 log_warnx(const char *emsg, ...) 110 { 111 va_list ap; 112 113 va_start(ap, emsg); 114 vlog(LOG_CRIT, emsg, ap); 115 va_end(ap); 116 } 117 118 void 119 log_info(const char *emsg, ...) 120 { 121 va_list ap; 122 123 va_start(ap, emsg); 124 vlog(LOG_INFO, emsg, ap); 125 va_end(ap); 126 } 127 128 void 129 log_debug(const char *emsg, ...) 130 { 131 va_list ap; 132 133 if (debug > 1) { 134 va_start(ap, emsg); 135 vlog(LOG_DEBUG, emsg, ap); 136 va_end(ap); 137 } 138 } 139 140 void 141 fatal(const char *emsg) 142 { 143 if (emsg == NULL) 144 logit(LOG_CRIT, "fatal: %s", strerror(errno)); 145 else 146 if (errno) 147 logit(LOG_CRIT, "fatal: %s: %s", 148 emsg, strerror(errno)); 149 else 150 logit(LOG_CRIT, "fatal: %s", emsg); 151 152 exit(1); 153 } 154 155 void 156 fatalx(const char *emsg) 157 { 158 errno = 0; 159 fatal(emsg); 160 } 161