logger.c revision 160917
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 40146756Scharnier#if 0 411590Srgrimes#ifndef lint 421590Srgrimesstatic char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93"; 43146756Scharnier#endif /* not lint */ 4427604Scharnier#endif 45146756Scharnier 4693525Sdwmalone#include <sys/cdefs.h> 4793525Sdwmalone__FBSDID("$FreeBSD: head/usr.bin/logger/logger.c 160917 2006-08-02 13:21:44Z bms $"); 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 *); 66160917Sbmsstatic void logmessage(int, char *, 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 89102944Sdwmalonemain(int argc, char *argv[]) 901590Srgrimes{ 911590Srgrimes int ch, logflags, pri; 92160917Sbms char *tag, *host, *svcname, buf[1024]; 931590Srgrimes 941590Srgrimes tag = NULL; 9563402Sdwmalone host = NULL; 96160917Sbms svcname = "syslog"; 9783150Sru pri = LOG_USER | LOG_NOTICE; 981590Srgrimes logflags = 0; 9919075Sphk unsetenv("TZ"); 100160917Sbms while ((ch = getopt(argc, argv, "46Af:h:iP:p:st:")) != -1) 1011590Srgrimes switch((char)ch) { 10270100Sume case '4': 10370100Sume family = PF_INET; 10470100Sume break; 10570100Sume#ifdef INET6 10670100Sume case '6': 10770100Sume family = PF_INET6; 10870100Sume break; 10970100Sume#endif 11070100Sume case 'A': 11170100Sume send_to_all++; 11270100Sume break; 1131590Srgrimes case 'f': /* file to log */ 11427604Scharnier if (freopen(optarg, "r", stdin) == NULL) 11527604Scharnier err(1, "%s", optarg); 1161590Srgrimes break; 11763402Sdwmalone case 'h': /* hostname to deliver to */ 11863402Sdwmalone host = optarg; 11963402Sdwmalone break; 1201590Srgrimes case 'i': /* log process id also */ 1211590Srgrimes logflags |= LOG_PID; 1221590Srgrimes break; 123160917Sbms case 'P': /* service name or port number */ 124160917Sbms svcname = optarg; 125160917Sbms break; 1261590Srgrimes case 'p': /* priority */ 1271590Srgrimes pri = pencode(optarg); 1281590Srgrimes break; 1291590Srgrimes case 's': /* log to standard error */ 1301590Srgrimes logflags |= LOG_PERROR; 1311590Srgrimes break; 1321590Srgrimes case 't': /* tag */ 1331590Srgrimes tag = optarg; 1341590Srgrimes break; 1351590Srgrimes case '?': 1361590Srgrimes default: 1371590Srgrimes usage(); 1381590Srgrimes } 1391590Srgrimes argc -= optind; 1401590Srgrimes argv += optind; 1411590Srgrimes 1421590Srgrimes /* setup for logging */ 1431590Srgrimes openlog(tag ? tag : getlogin(), logflags, 0); 1441590Srgrimes (void) fclose(stdout); 1451590Srgrimes 1461590Srgrimes /* log input line if appropriate */ 1471590Srgrimes if (argc > 0) { 148102944Sdwmalone char *p, *endp; 14993525Sdwmalone size_t len; 1501590Srgrimes 1511590Srgrimes for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { 1521590Srgrimes len = strlen(*argv); 1531590Srgrimes if (p + len > endp && p > buf) { 154160917Sbms logmessage(pri, host, svcname, buf); 1551590Srgrimes p = buf; 1561590Srgrimes } 1571590Srgrimes if (len > sizeof(buf) - 1) 158160917Sbms logmessage(pri, host, svcname, *argv++); 1591590Srgrimes else { 1601590Srgrimes if (p != buf) 1611590Srgrimes *p++ = ' '; 1621590Srgrimes bcopy(*argv++, p, len); 1631590Srgrimes *(p += len) = '\0'; 1641590Srgrimes } 1651590Srgrimes } 1661590Srgrimes if (p != buf) 167160917Sbms logmessage(pri, host, svcname, buf); 1681590Srgrimes } else 1691590Srgrimes while (fgets(buf, sizeof(buf), stdin) != NULL) 170160917Sbms logmessage(pri, host, svcname, buf); 1711590Srgrimes exit(0); 1721590Srgrimes} 1731590Srgrimes 1741590Srgrimes/* 17563402Sdwmalone * Send the message to syslog, either on the local host, or on a remote host 17663402Sdwmalone */ 17763402Sdwmalonevoid 178160917Sbmslogmessage(int pri, char *host, char *svcname, char *buf) 17963402Sdwmalone{ 18070100Sume static struct socks *socks; 18170100Sume static int nsock = 0; 18270100Sume struct addrinfo hints, *res, *r; 18363402Sdwmalone char *line; 18470100Sume int maxs, len, sock, error, i, lsent; 18563402Sdwmalone 18663402Sdwmalone if (host == NULL) { 18763402Sdwmalone syslog(pri, "%s", buf); 18863402Sdwmalone return; 18963402Sdwmalone } 19063402Sdwmalone 19170100Sume if (nsock <= 0) { /* set up socket stuff */ 19270100Sume /* resolve hostname */ 19370100Sume memset(&hints, 0, sizeof(hints)); 19470100Sume hints.ai_family = family; 19570100Sume hints.ai_socktype = SOCK_DGRAM; 196160917Sbms error = getaddrinfo(host, svcname, &hints, &res); 19770100Sume if (error == EAI_SERVICE) { 198160917Sbms warnx("%s/udp: unknown service", svcname); 19970100Sume error = getaddrinfo(host, "514", &hints, &res); 20070100Sume } 20170100Sume if (error) 20270100Sume errx(1, "%s: %s", gai_strerror(error), host); 20370100Sume /* count max number of sockets we may open */ 20470100Sume for (maxs = 0, r = res; r; r = r->ai_next, maxs++); 20570100Sume socks = malloc(maxs * sizeof(struct socks)); 20670100Sume if (!socks) 20770100Sume errx(1, "couldn't allocate memory for sockets"); 20870100Sume for (r = res; r; r = r->ai_next) { 20970100Sume sock = socket(r->ai_family, r->ai_socktype, 21070100Sume r->ai_protocol); 21170100Sume if (sock < 0) 21270100Sume continue; 21370100Sume memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen); 21470100Sume socks[nsock].addrlen = r->ai_addrlen; 21570100Sume socks[nsock++].sock = sock; 21670100Sume } 21770100Sume freeaddrinfo(res); 21870100Sume if (nsock <= 0) 21963402Sdwmalone errx(1, "socket"); 22063402Sdwmalone } 22163402Sdwmalone 22263402Sdwmalone if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1) 22363402Sdwmalone errx(1, "asprintf"); 22463402Sdwmalone 225146756Scharnier lsent = -1; 22670100Sume for (i = 0; i < nsock; ++i) { 22770100Sume lsent = sendto(socks[i].sock, line, len, 0, 22870100Sume (struct sockaddr *)&socks[i].addr, 22970100Sume socks[i].addrlen); 23070100Sume if (lsent == len && !send_to_all) 23170100Sume break; 23270100Sume } 23393525Sdwmalone if (lsent != len) { 23491433Sfenner if (lsent == -1) 23591433Sfenner warn ("sendto"); 23691433Sfenner else 23791433Sfenner warnx ("sendto: short send - %d bytes", lsent); 23893525Sdwmalone } 23963402Sdwmalone 24063402Sdwmalone free(line); 24163402Sdwmalone} 24263402Sdwmalone 24363402Sdwmalone/* 2441590Srgrimes * Decode a symbolic name to a numeric value 2451590Srgrimes */ 2461590Srgrimesint 247102944Sdwmalonepencode(char *s) 2481590Srgrimes{ 2491590Srgrimes char *save; 2501590Srgrimes int fac, lev; 2511590Srgrimes 2521590Srgrimes for (save = s; *s && *s != '.'; ++s); 2531590Srgrimes if (*s) { 2541590Srgrimes *s = '\0'; 2551590Srgrimes fac = decode(save, facilitynames); 25627604Scharnier if (fac < 0) 25727604Scharnier errx(1, "unknown facility name: %s", save); 2581590Srgrimes *s++ = '.'; 2591590Srgrimes } 2601590Srgrimes else { 2611590Srgrimes fac = 0; 2621590Srgrimes s = save; 2631590Srgrimes } 2641590Srgrimes lev = decode(s, prioritynames); 26527604Scharnier if (lev < 0) 26627604Scharnier errx(1, "unknown priority name: %s", save); 2671590Srgrimes return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); 2681590Srgrimes} 2691590Srgrimes 2701590Srgrimesint 271102944Sdwmalonedecode(char *name, CODE *codetab) 2721590Srgrimes{ 273102944Sdwmalone 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 286102944Sdwmaloneusage(void) 2871590Srgrimes{ 28863402Sdwmalone (void)fprintf(stderr, "usage: %s\n", 289160917Sbms "logger [-46Ais] [-f file] [-h host] [-P port] [-p pri] [-t tag]\n" 290160917Sbms " [message ...]" 29163402Sdwmalone ); 2921590Srgrimes exit(1); 2931590Srgrimes} 294