logger.c revision 93525
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 3527604Scharnierstatic 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 4127604Scharnier#if 0 421590Srgrimesstatic char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93"; 4327604Scharnier#endif 441590Srgrimes#endif /* not lint */ 451590Srgrimes 4693525Sdwmalone#include <sys/cdefs.h> 4793525Sdwmalone__FBSDID("$FreeBSD: head/usr.bin/logger/logger.c 93525 2002-04-01 11:06:00Z dwmalone $"); 4893525Sdwmalone 4963402Sdwmalone#include <sys/types.h> 5063402Sdwmalone#include <sys/socket.h> 5163402Sdwmalone#include <netinet/in.h> 5263402Sdwmalone 5327604Scharnier#include <ctype.h> 5427604Scharnier#include <err.h> 5563402Sdwmalone#include <netdb.h> 5627604Scharnier#include <stdio.h> 571590Srgrimes#include <stdlib.h> 581590Srgrimes#include <string.h> 5927604Scharnier#include <unistd.h> 601590Srgrimes 611590Srgrimes#define SYSLOG_NAMES 621590Srgrimes#include <syslog.h> 631590Srgrimes 6492920Simpint decode(char *, CODE *); 6592920Simpint pencode(char *); 6692920Simpstatic void logmessage(int, char *, char *); 6792920Simpstatic void usage(void); 681590Srgrimes 6970100Sumestruct socks { 7070100Sume int sock; 7170100Sume int addrlen; 7270100Sume struct sockaddr_storage addr; 7370100Sume}; 7470100Sume 7570100Sume#ifdef INET6 7670100Sumeint family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */ 7770100Sume#else 7870100Sumeint family = PF_INET; /* protocol family (IPv4 only) */ 7970100Sume#endif 8070100Sumeint send_to_all = 0; /* send message to all IPv4/IPv6 addresses */ 8170100Sume 821590Srgrimes/* 831590Srgrimes * logger -- read and log utility 841590Srgrimes * 851590Srgrimes * Reads from an input and arranges to write the result on the system 861590Srgrimes * log. 871590Srgrimes */ 881590Srgrimesint 891590Srgrimesmain(argc, argv) 901590Srgrimes int argc; 911590Srgrimes char *argv[]; 921590Srgrimes{ 931590Srgrimes int ch, logflags, pri; 9463402Sdwmalone char *tag, *host, buf[1024]; 951590Srgrimes 961590Srgrimes tag = NULL; 9763402Sdwmalone host = NULL; 9883150Sru pri = LOG_USER | LOG_NOTICE; 991590Srgrimes logflags = 0; 10019075Sphk unsetenv("TZ"); 10170100Sume while ((ch = getopt(argc, argv, "46Af:h:ip:st:")) != -1) 1021590Srgrimes switch((char)ch) { 10370100Sume case '4': 10470100Sume family = PF_INET; 10570100Sume break; 10670100Sume#ifdef INET6 10770100Sume case '6': 10870100Sume family = PF_INET6; 10970100Sume break; 11070100Sume#endif 11170100Sume case 'A': 11270100Sume send_to_all++; 11370100Sume break; 1141590Srgrimes case 'f': /* file to log */ 11527604Scharnier if (freopen(optarg, "r", stdin) == NULL) 11627604Scharnier err(1, "%s", optarg); 1171590Srgrimes break; 11863402Sdwmalone case 'h': /* hostname to deliver to */ 11963402Sdwmalone host = optarg; 12063402Sdwmalone break; 1211590Srgrimes case 'i': /* log process id also */ 1221590Srgrimes logflags |= LOG_PID; 1231590Srgrimes break; 1241590Srgrimes case 'p': /* priority */ 1251590Srgrimes pri = pencode(optarg); 1261590Srgrimes break; 1271590Srgrimes case 's': /* log to standard error */ 1281590Srgrimes logflags |= LOG_PERROR; 1291590Srgrimes break; 1301590Srgrimes case 't': /* tag */ 1311590Srgrimes tag = optarg; 1321590Srgrimes break; 1331590Srgrimes case '?': 1341590Srgrimes default: 1351590Srgrimes usage(); 1361590Srgrimes } 1371590Srgrimes argc -= optind; 1381590Srgrimes argv += optind; 1391590Srgrimes 1401590Srgrimes /* setup for logging */ 1411590Srgrimes openlog(tag ? tag : getlogin(), logflags, 0); 1421590Srgrimes (void) fclose(stdout); 1431590Srgrimes 1441590Srgrimes /* log input line if appropriate */ 1451590Srgrimes if (argc > 0) { 1461590Srgrimes register char *p, *endp; 14793525Sdwmalone size_t len; 1481590Srgrimes 1491590Srgrimes for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { 1501590Srgrimes len = strlen(*argv); 1511590Srgrimes if (p + len > endp && p > buf) { 15263402Sdwmalone logmessage(pri, host, buf); 1531590Srgrimes p = buf; 1541590Srgrimes } 1551590Srgrimes if (len > sizeof(buf) - 1) 15663402Sdwmalone logmessage(pri, host, *argv++); 1571590Srgrimes else { 1581590Srgrimes if (p != buf) 1591590Srgrimes *p++ = ' '; 1601590Srgrimes bcopy(*argv++, p, len); 1611590Srgrimes *(p += len) = '\0'; 1621590Srgrimes } 1631590Srgrimes } 1641590Srgrimes if (p != buf) 16563402Sdwmalone logmessage(pri, host, buf); 1661590Srgrimes } else 1671590Srgrimes while (fgets(buf, sizeof(buf), stdin) != NULL) 16863402Sdwmalone logmessage(pri, host, buf); 1691590Srgrimes exit(0); 1701590Srgrimes} 1711590Srgrimes 1721590Srgrimes/* 17363402Sdwmalone * Send the message to syslog, either on the local host, or on a remote host 17463402Sdwmalone */ 17563402Sdwmalonevoid 17663402Sdwmalonelogmessage(int pri, char *host, char *buf) 17763402Sdwmalone{ 17870100Sume static struct socks *socks; 17970100Sume static int nsock = 0; 18070100Sume struct addrinfo hints, *res, *r; 18163402Sdwmalone char *line; 18270100Sume int maxs, len, sock, error, i, lsent; 18363402Sdwmalone 18463402Sdwmalone if (host == NULL) { 18563402Sdwmalone syslog(pri, "%s", buf); 18663402Sdwmalone return; 18763402Sdwmalone } 18863402Sdwmalone 18970100Sume if (nsock <= 0) { /* set up socket stuff */ 19070100Sume /* resolve hostname */ 19170100Sume memset(&hints, 0, sizeof(hints)); 19270100Sume hints.ai_family = family; 19370100Sume hints.ai_socktype = SOCK_DGRAM; 19470100Sume error = getaddrinfo(host, "syslog", &hints, &res); 19570100Sume if (error == EAI_SERVICE) { 19663402Sdwmalone warnx ("syslog/udp: unknown service"); /* not fatal */ 19770100Sume error = getaddrinfo(host, "514", &hints, &res); 19870100Sume } 19970100Sume if (error) 20070100Sume errx(1, "%s: %s", gai_strerror(error), host); 20170100Sume /* count max number of sockets we may open */ 20270100Sume for (maxs = 0, r = res; r; r = r->ai_next, maxs++); 20370100Sume socks = malloc(maxs * sizeof(struct socks)); 20470100Sume if (!socks) 20570100Sume errx(1, "couldn't allocate memory for sockets"); 20670100Sume for (r = res; r; r = r->ai_next) { 20770100Sume sock = socket(r->ai_family, r->ai_socktype, 20870100Sume r->ai_protocol); 20970100Sume if (sock < 0) 21070100Sume continue; 21170100Sume memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen); 21270100Sume socks[nsock].addrlen = r->ai_addrlen; 21370100Sume socks[nsock++].sock = sock; 21470100Sume } 21570100Sume freeaddrinfo(res); 21670100Sume if (nsock <= 0) 21763402Sdwmalone errx(1, "socket"); 21863402Sdwmalone } 21963402Sdwmalone 22063402Sdwmalone if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1) 22163402Sdwmalone errx(1, "asprintf"); 22263402Sdwmalone 22370100Sume for (i = 0; i < nsock; ++i) { 22470100Sume lsent = sendto(socks[i].sock, line, len, 0, 22570100Sume (struct sockaddr *)&socks[i].addr, 22670100Sume socks[i].addrlen); 22770100Sume if (lsent == len && !send_to_all) 22870100Sume break; 22970100Sume } 23093525Sdwmalone if (lsent != len) { 23191433Sfenner if (lsent == -1) 23291433Sfenner warn ("sendto"); 23391433Sfenner else 23491433Sfenner warnx ("sendto: short send - %d bytes", lsent); 23593525Sdwmalone } 23663402Sdwmalone 23763402Sdwmalone free(line); 23863402Sdwmalone} 23963402Sdwmalone 24063402Sdwmalone/* 2411590Srgrimes * Decode a symbolic name to a numeric value 2421590Srgrimes */ 2431590Srgrimesint 2441590Srgrimespencode(s) 2451590Srgrimes register char *s; 2461590Srgrimes{ 2471590Srgrimes char *save; 2481590Srgrimes int fac, lev; 2491590Srgrimes 2501590Srgrimes for (save = s; *s && *s != '.'; ++s); 2511590Srgrimes if (*s) { 2521590Srgrimes *s = '\0'; 2531590Srgrimes fac = decode(save, facilitynames); 25427604Scharnier if (fac < 0) 25527604Scharnier errx(1, "unknown facility name: %s", save); 2561590Srgrimes *s++ = '.'; 2571590Srgrimes } 2581590Srgrimes else { 2591590Srgrimes fac = 0; 2601590Srgrimes s = save; 2611590Srgrimes } 2621590Srgrimes lev = decode(s, prioritynames); 26327604Scharnier if (lev < 0) 26427604Scharnier errx(1, "unknown priority name: %s", save); 2651590Srgrimes return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); 2661590Srgrimes} 2671590Srgrimes 2681590Srgrimesint 2691590Srgrimesdecode(name, codetab) 2701590Srgrimes char *name; 2711590Srgrimes CODE *codetab; 2721590Srgrimes{ 2731590Srgrimes register CODE *c; 2741590Srgrimes 2751590Srgrimes if (isdigit(*name)) 2761590Srgrimes return (atoi(name)); 2771590Srgrimes 2781590Srgrimes for (c = codetab; c->c_name; c++) 2791590Srgrimes if (!strcasecmp(name, c->c_name)) 2801590Srgrimes return (c->c_val); 2811590Srgrimes 2821590Srgrimes return (-1); 2831590Srgrimes} 2841590Srgrimes 28527604Scharnierstatic void 2861590Srgrimesusage() 2871590Srgrimes{ 28863402Sdwmalone (void)fprintf(stderr, "usage: %s\n", 28970100Sume "logger [-46Ais] [-f file] [-h host] [-p pri] [-t tag] [message ...]" 29063402Sdwmalone ); 2911590Srgrimes exit(1); 2921590Srgrimes} 293