1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)logger.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/logger/logger.c,v 1.5.2.3 2001/09/06 17:38:57 ru Exp $ 36 * $DragonFly: src/usr.bin/logger/logger.c,v 1.3 2003/10/04 20:36:48 hmp Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <netinet/in.h> 42 43 #include <ctype.h> 44 #include <err.h> 45 #include <netdb.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 #define SYSLOG_NAMES 52 #include <syslog.h> 53 54 int decode(char *, CODE *); 55 int pencode(char *); 56 static void logmessage(int, char *, char *); 57 static void usage(void); 58 59 struct socks { 60 int sock; 61 int addrlen; 62 struct sockaddr_storage addr; 63 }; 64 65 #ifdef INET6 66 int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */ 67 #else 68 int family = PF_INET; /* protocol family (IPv4 only) */ 69 #endif 70 int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */ 71 72 /* 73 * logger -- read and log utility 74 * 75 * Reads from an input and arranges to write the result on the system 76 * log. 77 */ 78 int 79 main(int argc, char **argv) 80 { 81 int ch, logflags, pri; 82 char *tag, *host, buf[1024]; 83 84 tag = NULL; 85 host = NULL; 86 pri = LOG_USER | LOG_NOTICE; 87 logflags = 0; 88 unsetenv("TZ"); 89 while ((ch = getopt(argc, argv, "46Af:h:ip:st:")) != -1) 90 switch((char)ch) { 91 case '4': 92 family = PF_INET; 93 break; 94 #ifdef INET6 95 case '6': 96 family = PF_INET6; 97 break; 98 #endif 99 case 'A': 100 send_to_all++; 101 break; 102 case 'f': /* file to log */ 103 if (freopen(optarg, "r", stdin) == NULL) 104 err(1, "%s", optarg); 105 break; 106 case 'h': /* hostname to deliver to */ 107 host = optarg; 108 break; 109 case 'i': /* log process id also */ 110 logflags |= LOG_PID; 111 break; 112 case 'p': /* priority */ 113 pri = pencode(optarg); 114 break; 115 case 's': /* log to standard error */ 116 logflags |= LOG_PERROR; 117 break; 118 case 't': /* tag */ 119 tag = optarg; 120 break; 121 case '?': 122 default: 123 usage(); 124 } 125 argc -= optind; 126 argv += optind; 127 128 /* setup for logging */ 129 openlog(tag ? tag : getlogin(), logflags, 0); 130 (void) fclose(stdout); 131 132 /* log input line if appropriate */ 133 if (argc > 0) { 134 register char *p, *endp; 135 int len; 136 137 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { 138 len = strlen(*argv); 139 if (p + len > endp && p > buf) { 140 logmessage(pri, host, buf); 141 p = buf; 142 } 143 if (len > sizeof(buf) - 1) 144 logmessage(pri, host, *argv++); 145 else { 146 if (p != buf) 147 *p++ = ' '; 148 bcopy(*argv++, p, len); 149 *(p += len) = '\0'; 150 } 151 } 152 if (p != buf) 153 logmessage(pri, host, buf); 154 } else 155 while (fgets(buf, sizeof(buf), stdin) != NULL) 156 logmessage(pri, host, buf); 157 exit(0); 158 } 159 160 /* 161 * Send the message to syslog, either on the local host, or on a remote host 162 */ 163 void 164 logmessage(int pri, char *host, char *buf) 165 { 166 static struct socks *socks; 167 static int nsock = 0; 168 struct addrinfo hints, *res, *r; 169 char *line; 170 int maxs, len, sock, error, i, lsent; 171 172 if (host == NULL) { 173 syslog(pri, "%s", buf); 174 return; 175 } 176 177 if (nsock <= 0) { /* set up socket stuff */ 178 /* resolve hostname */ 179 memset(&hints, 0, sizeof(hints)); 180 hints.ai_family = family; 181 hints.ai_socktype = SOCK_DGRAM; 182 error = getaddrinfo(host, "syslog", &hints, &res); 183 if (error == EAI_SERVICE) { 184 warnx ("syslog/udp: unknown service"); /* not fatal */ 185 error = getaddrinfo(host, "514", &hints, &res); 186 } 187 if (error) 188 errx(1, "%s: %s", gai_strerror(error), host); 189 /* count max number of sockets we may open */ 190 for (maxs = 0, r = res; r; r = r->ai_next, maxs++); 191 socks = malloc(maxs * sizeof(struct socks)); 192 if (!socks) 193 errx(1, "couldn't allocate memory for sockets"); 194 for (r = res; r; r = r->ai_next) { 195 sock = socket(r->ai_family, r->ai_socktype, 196 r->ai_protocol); 197 if (sock < 0) 198 continue; 199 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen); 200 socks[nsock].addrlen = r->ai_addrlen; 201 socks[nsock++].sock = sock; 202 } 203 freeaddrinfo(res); 204 if (nsock <= 0) 205 errx(1, "socket"); 206 } 207 208 if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1) 209 errx(1, "asprintf"); 210 211 for (i = 0; i < nsock; ++i) { 212 lsent = sendto(socks[i].sock, line, len, 0, 213 (struct sockaddr *)&socks[i].addr, 214 socks[i].addrlen); 215 if (lsent == len && !send_to_all) 216 break; 217 } 218 if (lsent != len) 219 warnx ("sendmsg"); 220 221 free(line); 222 } 223 224 /* 225 * Decode a symbolic name to a numeric value 226 */ 227 int 228 pencode(register char *s) 229 { 230 char *save; 231 int fac, lev; 232 233 for (save = s; *s && *s != '.'; ++s); 234 if (*s) { 235 *s = '\0'; 236 fac = decode(save, facilitynames); 237 if (fac < 0) 238 errx(1, "unknown facility name: %s", save); 239 *s++ = '.'; 240 } 241 else { 242 fac = 0; 243 s = save; 244 } 245 lev = decode(s, prioritynames); 246 if (lev < 0) 247 errx(1, "unknown priority name: %s", save); 248 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); 249 } 250 251 int 252 decode(char *name, CODE *codetab) 253 { 254 register CODE *c; 255 256 if (isdigit(*name)) 257 return (atoi(name)); 258 259 for (c = codetab; c->c_name; c++) 260 if (!strcasecmp(name, c->c_name)) 261 return (c->c_val); 262 263 return (-1); 264 } 265 266 static void 267 usage(void) 268 { 269 (void)fprintf(stderr, "usage: %s\n", 270 "logger [-46Ais] [-f file] [-h host] [-p pri] [-t tag] [message ...]" 271 ); 272 exit(1); 273 } 274