1 /* $OpenBSD: log.c,v 1.8 2021/01/19 10:16:44 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 <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 #include <unistd.h> 27 28 #include "log.h" 29 #include "ripd.h" 30 31 int debug; 32 int verbose; 33 const char *log_procname; 34 35 void 36 log_init(int n_debug) 37 { 38 extern char *__progname; 39 40 debug = n_debug; 41 42 if (!debug) 43 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON); 44 45 tzset(); 46 } 47 48 void 49 log_verbose(int v) 50 { 51 verbose = v; 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 void 84 log_warn(const char *emsg, ...) 85 { 86 char *nfmt; 87 va_list ap; 88 89 /* best effort to even work in out of memory situations */ 90 if (emsg == NULL) 91 logit(LOG_ERR, "%s", strerror(errno)); 92 else { 93 va_start(ap, emsg); 94 95 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) { 96 /* we tried it... */ 97 vlog(LOG_ERR, emsg, ap); 98 logit(LOG_ERR, "%s", strerror(errno)); 99 } else { 100 vlog(LOG_ERR, nfmt, ap); 101 free(nfmt); 102 } 103 va_end(ap); 104 } 105 } 106 107 void 108 log_warnx(const char *emsg, ...) 109 { 110 va_list ap; 111 112 va_start(ap, emsg); 113 vlog(LOG_ERR, emsg, ap); 114 va_end(ap); 115 } 116 117 void 118 log_info(const char *emsg, ...) 119 { 120 va_list ap; 121 122 va_start(ap, emsg); 123 vlog(LOG_INFO, emsg, ap); 124 va_end(ap); 125 } 126 127 void 128 log_debug(const char *emsg, ...) 129 { 130 va_list ap; 131 132 if (verbose) { 133 va_start(ap, emsg); 134 vlog(LOG_DEBUG, emsg, ap); 135 va_end(ap); 136 } 137 } 138 139 void 140 fatal(const char *emsg) 141 { 142 if (emsg == NULL) 143 logit(LOG_CRIT, "fatal in %s: %s", log_procname, 144 strerror(errno)); 145 else 146 if (errno) 147 logit(LOG_CRIT, "fatal in %s: %s: %s", 148 log_procname, emsg, strerror(errno)); 149 else 150 logit(LOG_CRIT, "fatal in %s: %s", 151 log_procname, emsg); 152 153 exit(1); 154 } 155 156 void 157 fatalx(const char *emsg) 158 { 159 errno = 0; 160 fatal(emsg); 161 } 162