logger.c revision 92920
11590Srgrimes/* 21590Srgrimes * Copyright (c) 1983, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 3. All advertising materials mentioning features or use of this software 141590Srgrimes * must display the following acknowledgement: 151590Srgrimes * This product includes software developed by the University of 161590Srgrimes * California, Berkeley and its contributors. 171590Srgrimes * 4. Neither the name of the University nor the names of its contributors 181590Srgrimes * may be used to endorse or promote products derived from this software 191590Srgrimes * without specific prior written permission. 201590Srgrimes * 211590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311590Srgrimes * SUCH DAMAGE. 321590Srgrimes */ 331590Srgrimes 341590Srgrimes#ifndef lint 351590Srgrimesstatic const char copyright[] = 361590Srgrimes"@(#) Copyright (c) 1983, 1993\n\ 371590Srgrimes The Regents of the University of California. All rights reserved.\n"; 381590Srgrimes#endif /* not lint */ 391590Srgrimes 401590Srgrimes#ifndef lint 411590Srgrimes#if 0 421590Srgrimesstatic char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93"; 431590Srgrimes#endif 441590Srgrimesstatic const char rcsid[] = 451590Srgrimes "$FreeBSD: head/usr.bin/logger/logger.c 92920 2002-03-22 01:22:50Z imp $"; 461590Srgrimes#endif /* not lint */ 471590Srgrimes 481590Srgrimes#include <sys/types.h> 491590Srgrimes#include <sys/socket.h> 501590Srgrimes#include <netinet/in.h> 511590Srgrimes 521590Srgrimes#include <ctype.h> 5312909Swollman#include <err.h> 541590Srgrimes#include <netdb.h> 551590Srgrimes#include <stdio.h> 561590Srgrimes#include <stdlib.h> 571590Srgrimes#include <string.h> 581590Srgrimes#include <unistd.h> 591590Srgrimes 601590Srgrimes#define SYSLOG_NAMES 611590Srgrimes#include <syslog.h> 621590Srgrimes 631590Srgrimesint decode(char *, CODE *); 641590Srgrimesint pencode(char *); 651590Srgrimesstatic void logmessage(int, char *, char *); 661590Srgrimesstatic void usage(void); 671590Srgrimes 681590Srgrimesstruct socks { 6912909Swollman int sock; 7012909Swollman int addrlen; 711590Srgrimes struct sockaddr_storage addr; 721590Srgrimes}; 731590Srgrimes 741590Srgrimes#ifdef INET6 751590Srgrimesint family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */ 761590Srgrimes#else 771590Srgrimesint family = PF_INET; /* protocol family (IPv4 only) */ 781590Srgrimes#endif 791590Srgrimesint send_to_all = 0; /* send message to all IPv4/IPv6 addresses */ 801590Srgrimes 811590Srgrimes/* 821590Srgrimes * logger -- read and log utility 831590Srgrimes * 841590Srgrimes * Reads from an input and arranges to write the result on the system 851590Srgrimes * log. 861590Srgrimes */ 871590Srgrimesint 881590Srgrimesmain(argc, argv) 891590Srgrimes int argc; 901590Srgrimes char *argv[]; 911590Srgrimes{ 921590Srgrimes int ch, logflags, pri; 931590Srgrimes char *tag, *host, buf[1024]; 941590Srgrimes 951590Srgrimes tag = NULL; 961590Srgrimes host = NULL; 971590Srgrimes pri = LOG_USER | LOG_NOTICE; 981590Srgrimes logflags = 0; 991590Srgrimes unsetenv("TZ"); 1001590Srgrimes while ((ch = getopt(argc, argv, "46Af:h:ip:st:")) != -1) 1011590Srgrimes switch((char)ch) { 1021590Srgrimes case '4': 10312909Swollman family = PF_INET; 10412909Swollman break; 10512909Swollman#ifdef INET6 10612909Swollman case '6': 10712909Swollman family = PF_INET6; 10812909Swollman break; 10912909Swollman#endif 11012909Swollman case 'A': 1111590Srgrimes send_to_all++; 11212909Swollman break; 11312909Swollman case 'f': /* file to log */ 11412909Swollman if (freopen(optarg, "r", stdin) == NULL) 11512909Swollman err(1, "%s", optarg); 1161590Srgrimes break; 11712909Swollman case 'h': /* hostname to deliver to */ 11812909Swollman host = optarg; 11912909Swollman break; 12012909Swollman case 'i': /* log process id also */ 1211590Srgrimes logflags |= LOG_PID; 12212909Swollman break; 12312909Swollman case 'p': /* priority */ 12412909Swollman pri = pencode(optarg); 12512909Swollman break; 12612909Swollman case 's': /* log to standard error */ 12712909Swollman logflags |= LOG_PERROR; 1281590Srgrimes break; 1291590Srgrimes case 't': /* tag */ 1301590Srgrimes tag = optarg; 1311590Srgrimes break; 1321590Srgrimes case '?': 1331590Srgrimes default: 1341590Srgrimes usage(); 1351590Srgrimes } 1361590Srgrimes argc -= optind; 1371590Srgrimes argv += optind; 1381590Srgrimes 1398874Srgrimes /* setup for logging */ 14012909Swollman openlog(tag ? tag : getlogin(), logflags, 0); 14112909Swollman (void) fclose(stdout); 14212909Swollman 1431590Srgrimes /* log input line if appropriate */ 1441590Srgrimes if (argc > 0) { 1451590Srgrimes register char *p, *endp; 1461590Srgrimes int len; 1471590Srgrimes 1481590Srgrimes for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { 1491590Srgrimes len = strlen(*argv); 15014472Sache if (p + len > endp && p > buf) { 15114472Sache logmessage(pri, host, buf); 1521590Srgrimes p = buf; 15314472Sache } 1541590Srgrimes if (len > sizeof(buf) - 1) 1551590Srgrimes logmessage(pri, host, *argv++); 1561590Srgrimes else { 1571590Srgrimes if (p != buf) 1581590Srgrimes *p++ = ' '; 1591590Srgrimes bcopy(*argv++, p, len); 1601590Srgrimes *(p += len) = '\0'; 1611590Srgrimes } 1621590Srgrimes } 16312909Swollman if (p != buf) 16412909Swollman logmessage(pri, host, buf); 16512909Swollman } else 16612909Swollman while (fgets(buf, sizeof(buf), stdin) != NULL) 16712909Swollman logmessage(pri, host, buf); 16812909Swollman exit(0); 16912909Swollman} 17012909Swollman 17112909Swollman/* 17212909Swollman * Send the message to syslog, either on the local host, or on a remote host 17312909Swollman */ 1741590Srgrimesvoid 175logmessage(int pri, char *host, char *buf) 176{ 177 static struct socks *socks; 178 static int nsock = 0; 179 struct addrinfo hints, *res, *r; 180 char *line; 181 int maxs, len, sock, error, i, lsent; 182 183 if (host == NULL) { 184 syslog(pri, "%s", buf); 185 return; 186 } 187 188 if (nsock <= 0) { /* set up socket stuff */ 189 /* resolve hostname */ 190 memset(&hints, 0, sizeof(hints)); 191 hints.ai_family = family; 192 hints.ai_socktype = SOCK_DGRAM; 193 error = getaddrinfo(host, "syslog", &hints, &res); 194 if (error == EAI_SERVICE) { 195 warnx ("syslog/udp: unknown service"); /* not fatal */ 196 error = getaddrinfo(host, "514", &hints, &res); 197 } 198 if (error) 199 errx(1, "%s: %s", gai_strerror(error), host); 200 /* count max number of sockets we may open */ 201 for (maxs = 0, r = res; r; r = r->ai_next, maxs++); 202 socks = malloc(maxs * sizeof(struct socks)); 203 if (!socks) 204 errx(1, "couldn't allocate memory for sockets"); 205 for (r = res; r; r = r->ai_next) { 206 sock = socket(r->ai_family, r->ai_socktype, 207 r->ai_protocol); 208 if (sock < 0) 209 continue; 210 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen); 211 socks[nsock].addrlen = r->ai_addrlen; 212 socks[nsock++].sock = sock; 213 } 214 freeaddrinfo(res); 215 if (nsock <= 0) 216 errx(1, "socket"); 217 } 218 219 if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1) 220 errx(1, "asprintf"); 221 222 for (i = 0; i < nsock; ++i) { 223 lsent = sendto(socks[i].sock, line, len, 0, 224 (struct sockaddr *)&socks[i].addr, 225 socks[i].addrlen); 226 if (lsent == len && !send_to_all) 227 break; 228 } 229 if (lsent != len) 230 if (lsent == -1) 231 warn ("sendto"); 232 else 233 warnx ("sendto: short send - %d bytes", lsent); 234 235 free(line); 236} 237 238/* 239 * Decode a symbolic name to a numeric value 240 */ 241int 242pencode(s) 243 register char *s; 244{ 245 char *save; 246 int fac, lev; 247 248 for (save = s; *s && *s != '.'; ++s); 249 if (*s) { 250 *s = '\0'; 251 fac = decode(save, facilitynames); 252 if (fac < 0) 253 errx(1, "unknown facility name: %s", save); 254 *s++ = '.'; 255 } 256 else { 257 fac = 0; 258 s = save; 259 } 260 lev = decode(s, prioritynames); 261 if (lev < 0) 262 errx(1, "unknown priority name: %s", save); 263 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); 264} 265 266int 267decode(name, codetab) 268 char *name; 269 CODE *codetab; 270{ 271 register CODE *c; 272 273 if (isdigit(*name)) 274 return (atoi(name)); 275 276 for (c = codetab; c->c_name; c++) 277 if (!strcasecmp(name, c->c_name)) 278 return (c->c_val); 279 280 return (-1); 281} 282 283static void 284usage() 285{ 286 (void)fprintf(stderr, "usage: %s\n", 287 "logger [-46Ais] [-f file] [-h host] [-p pri] [-t tag] [message ...]" 288 ); 289 exit(1); 290} 291