1 /* $OpenBSD: log.c,v 1.9 2021/01/19 10:51:35 claudio 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 USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 21 #include <arpa/inet.h> 22 #include <errno.h> 23 #include <netdb.h> 24 #include <stdarg.h> 25 #include <stdio.h> 26 #include <stdlib.h> 27 #include <string.h> 28 #include <syslog.h> 29 #include <time.h> 30 #include <unistd.h> 31 #include <arpa/inet.h> 32 #include <netdb.h> 33 34 #include "eigrpd.h" 35 #include "log.h" 36 37 int debug; 38 int verbose; 39 const char *log_procname; 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 log_verbose(int v) 56 { 57 verbose = v; 58 } 59 60 void 61 logit(int pri, const char *fmt, ...) 62 { 63 va_list ap; 64 65 va_start(ap, fmt); 66 vlog(pri, fmt, ap); 67 va_end(ap); 68 } 69 70 void 71 vlog(int pri, const char *fmt, va_list ap) 72 { 73 char *nfmt; 74 75 if (debug) { 76 /* best effort in out of mem situations */ 77 if (asprintf(&nfmt, "%s\n", fmt) == -1) { 78 vfprintf(stderr, fmt, ap); 79 fprintf(stderr, "\n"); 80 } else { 81 vfprintf(stderr, nfmt, ap); 82 free(nfmt); 83 } 84 fflush(stderr); 85 } else 86 vsyslog(pri, fmt, ap); 87 } 88 89 void 90 log_warn(const char *emsg, ...) 91 { 92 char *nfmt; 93 va_list ap; 94 95 /* best effort to even work in out of memory situations */ 96 if (emsg == NULL) 97 logit(LOG_ERR, "%s", strerror(errno)); 98 else { 99 va_start(ap, emsg); 100 101 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { 102 /* we tried it... */ 103 vlog(LOG_ERR, emsg, ap); 104 logit(LOG_ERR, "%s", strerror(errno)); 105 } else { 106 vlog(LOG_ERR, nfmt, ap); 107 free(nfmt); 108 } 109 va_end(ap); 110 } 111 } 112 113 void 114 log_warnx(const char *emsg, ...) 115 { 116 va_list ap; 117 118 va_start(ap, emsg); 119 vlog(LOG_ERR, emsg, ap); 120 va_end(ap); 121 } 122 123 void 124 log_info(const char *emsg, ...) 125 { 126 va_list ap; 127 128 va_start(ap, emsg); 129 vlog(LOG_INFO, emsg, ap); 130 va_end(ap); 131 } 132 133 void 134 log_debug(const char *emsg, ...) 135 { 136 va_list ap; 137 138 if (verbose) { 139 va_start(ap, emsg); 140 vlog(LOG_DEBUG, emsg, ap); 141 va_end(ap); 142 } 143 } 144 145 void 146 fatal(const char *emsg) 147 { 148 if (emsg == NULL) 149 logit(LOG_CRIT, "fatal in %s: %s", log_procname, 150 strerror(errno)); 151 else 152 if (errno) 153 logit(LOG_CRIT, "fatal in %s: %s: %s", 154 log_procname, emsg, strerror(errno)); 155 else 156 logit(LOG_CRIT, "fatal in %s: %s", 157 log_procname, emsg); 158 159 exit(1); 160 } 161 162 void 163 fatalx(const char *emsg) 164 { 165 errno = 0; 166 fatal(emsg); 167 } 168