1 /*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include <errno.h> 33 #include <stdarg.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <syslog.h> 38 #include <vis.h> 39 40 #include "common.h" 41 42 static int log_level = 0; 43 static char *peer_name = NULL; 44 static char *peer_addr = NULL; 45 46 #define MSGBUF_LEN 1024 47 48 void 49 log_init(int level) 50 { 51 52 log_level = level; 53 openlog(getprogname(), LOG_NDELAY | LOG_PID, LOG_DAEMON); 54 } 55 56 void 57 log_set_peer_name(const char *name) 58 { 59 60 /* 61 * XXX: Turn it into assertion? 62 */ 63 if (peer_name != NULL) 64 log_errx(1, "%s called twice", __func__); 65 if (peer_addr == NULL) 66 log_errx(1, "%s called before log_set_peer_addr", __func__); 67 68 peer_name = checked_strdup(name); 69 } 70 71 void 72 log_set_peer_addr(const char *addr) 73 { 74 75 /* 76 * XXX: Turn it into assertion? 77 */ 78 if (peer_addr != NULL) 79 log_errx(1, "%s called twice", __func__); 80 81 peer_addr = checked_strdup(addr); 82 } 83 84 static void 85 log_common(int priority, int log_errno, const char *fmt, va_list ap) 86 { 87 static char msgbuf[MSGBUF_LEN]; 88 static char msgbuf_strvised[MSGBUF_LEN * 4 + 1]; 89 int ret; 90 91 ret = vsnprintf(msgbuf, sizeof(msgbuf), fmt, ap); 92 if (ret < 0) { 93 fprintf(stderr, "%s: snprintf failed", getprogname()); 94 syslog(LOG_CRIT, "snprintf failed"); 95 exit(1); 96 } 97 98 ret = strnvis(msgbuf_strvised, sizeof(msgbuf_strvised), msgbuf, VIS_NL); 99 if (ret < 0) { 100 fprintf(stderr, "%s: strnvis failed", getprogname()); 101 syslog(LOG_CRIT, "strnvis failed"); 102 exit(1); 103 } 104 105 if (log_errno == -1) { 106 if (peer_name != NULL) { 107 fprintf(stderr, "%s: %s (%s): %s\n", getprogname(), 108 peer_addr, peer_name, msgbuf_strvised); 109 syslog(priority, "%s (%s): %s", 110 peer_addr, peer_name, msgbuf_strvised); 111 } else if (peer_addr != NULL) { 112 fprintf(stderr, "%s: %s: %s\n", getprogname(), 113 peer_addr, msgbuf_strvised); 114 syslog(priority, "%s: %s", 115 peer_addr, msgbuf_strvised); 116 } else { 117 fprintf(stderr, "%s: %s\n", getprogname(), msgbuf_strvised); 118 syslog(priority, "%s", msgbuf_strvised); 119 } 120 121 } else { 122 if (peer_name != NULL) { 123 fprintf(stderr, "%s: %s (%s): %s: %s\n", getprogname(), 124 peer_addr, peer_name, msgbuf_strvised, strerror(errno)); 125 syslog(priority, "%s (%s): %s: %s", 126 peer_addr, peer_name, msgbuf_strvised, strerror(errno)); 127 } else if (peer_addr != NULL) { 128 fprintf(stderr, "%s: %s: %s: %s\n", getprogname(), 129 peer_addr, msgbuf_strvised, strerror(errno)); 130 syslog(priority, "%s: %s: %s", 131 peer_addr, msgbuf_strvised, strerror(errno)); 132 } else { 133 fprintf(stderr, "%s: %s: %s\n", getprogname(), 134 msgbuf_strvised, strerror(errno)); 135 syslog(priority, "%s: %s", 136 msgbuf_strvised, strerror(errno)); 137 } 138 } 139 } 140 141 void 142 log_err(int eval, const char *fmt, ...) 143 { 144 va_list ap; 145 146 va_start(ap, fmt); 147 log_common(LOG_CRIT, errno, fmt, ap); 148 va_end(ap); 149 150 exit(eval); 151 } 152 153 void 154 log_errx(int eval, const char *fmt, ...) 155 { 156 va_list ap; 157 158 va_start(ap, fmt); 159 log_common(LOG_CRIT, -1, fmt, ap); 160 va_end(ap); 161 162 exit(eval); 163 } 164 165 void 166 log_warn(const char *fmt, ...) 167 { 168 va_list ap; 169 170 va_start(ap, fmt); 171 log_common(LOG_WARNING, errno, fmt, ap); 172 va_end(ap); 173 } 174 175 void 176 log_warnx(const char *fmt, ...) 177 { 178 va_list ap; 179 180 va_start(ap, fmt); 181 log_common(LOG_WARNING, -1, fmt, ap); 182 va_end(ap); 183 } 184 185 void 186 log_debugx(const char *fmt, ...) 187 { 188 va_list ap; 189 190 if (log_level == 0) 191 return; 192 193 va_start(ap, fmt); 194 log_common(LOG_DEBUG, -1, fmt, ap); 195 va_end(ap); 196 } 197