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
34#ifndef lint
35__attribute__((__used__))
36static const char copyright[] =
37"@(#) Copyright (c) 1983, 1993\n\
38	The Regents of the University of California.  All rights reserved.\n";
39#endif /* not lint */
40
41#if 0
42#ifndef lint
43static char sccsid[] = "@(#)logger.c	8.1 (Berkeley) 6/6/93";
44#endif /* not lint */
45#endif
46
47#include <sys/cdefs.h>
48__FBSDID("$FreeBSD: src/usr.bin/logger/logger.c,v 1.17 2008/02/05 17:34:44 obrien Exp $");
49
50#include <sys/types.h>
51#include <sys/socket.h>
52#include <netinet/in.h>
53
54#include <ctype.h>
55#include <err.h>
56#include <netdb.h>
57#include <stdio.h>
58#include <stdlib.h>
59#include <string.h>
60#include <unistd.h>
61
62#define	SYSLOG_NAMES
63#include <syslog.h>
64
65int	decode(char *, CODE *);
66int	pencode(char *);
67#ifndef __APPLE__
68static void	logmessage(int, const char *, const char *, const char *);
69#endif
70static void	usage(void);
71
72struct socks {
73    int sock;
74    int addrlen;
75    struct sockaddr_storage addr;
76};
77
78#ifdef INET6
79int	family = PF_UNSPEC;	/* protocol family (IPv4, IPv6 or both) */
80#else
81int	family = PF_INET;	/* protocol family (IPv4 only) */
82#endif
83int	send_to_all = 0;	/* send message to all IPv4/IPv6 addresses */
84
85/*
86 * logger -- read and log utility
87 *
88 *	Reads from an input and arranges to write the result on the system
89 *	log.
90 */
91int
92main(int argc, char *argv[])
93{
94	int ch, logflags, pri;
95	char *tag, *host, buf[1024];
96	const char *svcname;
97
98	tag = NULL;
99	host = NULL;
100	svcname = "syslog";
101	pri = LOG_USER | LOG_NOTICE;
102	logflags = 0;
103	unsetenv("TZ");
104#ifdef __APPLE__
105	while ((ch = getopt(argc, argv, "f:ip:st:")) != -1)
106#else
107	while ((ch = getopt(argc, argv, "46Af:h:iP:p:st:")) != -1)
108#endif
109		switch((char)ch) {
110#ifndef __APPLE__
111		case '4':
112			family = PF_INET;
113			break;
114#ifdef INET6
115		case '6':
116			family = PF_INET6;
117			break;
118#endif
119		case 'A':
120			send_to_all++;
121			break;
122#endif /* __APPLE__ */
123		case 'f':		/* file to log */
124			if (freopen(optarg, "r", stdin) == NULL)
125				err(1, "%s", optarg);
126			break;
127#ifndef __APPLE__
128		case 'h':		/* hostname to deliver to */
129			host = optarg;
130			break;
131#endif /* __APPLE__ */
132		case 'i':		/* log process id also */
133			logflags |= LOG_PID;
134			break;
135#ifndef __APPLE__
136		case 'P':		/* service name or port number */
137			svcname = optarg;
138			break;
139#endif /* __APPLE__ */
140		case 'p':		/* priority */
141			pri = pencode(optarg);
142			break;
143		case 's':		/* log to standard error */
144			logflags |= LOG_PERROR;
145			break;
146		case 't':		/* tag */
147			tag = optarg;
148			break;
149		case '?':
150		default:
151			usage();
152		}
153	argc -= optind;
154	argv += optind;
155
156	/* setup for logging */
157	openlog(tag ? tag : getlogin(), logflags, 0);
158	(void) fclose(stdout);
159
160	/* log input line if appropriate */
161	if (argc > 0) {
162		char *p, *endp;
163		size_t len;
164
165		for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
166			len = strlen(*argv);
167			if (p + len > endp && p > buf) {
168#ifdef __APPLE__
169				syslog(pri, "%s", buf);
170#else
171				logmessage(pri, host, svcname, buf);
172#endif
173				p = buf;
174			}
175			if (len > sizeof(buf) - 1)
176#ifdef __APPLE__
177				syslog(pri, "%s", *argv++);
178#else
179				logmessage(pri, host, svcname, *argv++);
180#endif
181			else {
182				if (p != buf)
183					*p++ = ' ';
184				bcopy(*argv++, p, len);
185				*(p += len) = '\0';
186			}
187		}
188		if (p != buf)
189#ifdef __APPLE__
190			syslog(pri, "%s", buf);
191#else
192			logmessage(pri, host, svcname, buf);
193#endif
194	} else
195		while (fgets(buf, sizeof(buf), stdin) != NULL)
196#ifdef __APPLE__
197			syslog(pri, "%s", buf);
198#else
199			logmessage(pri, host, svcname, buf);
200#endif
201	exit(0);
202}
203
204#ifndef __APPLE__
205/*
206 *  Send the message to syslog, either on the local host, or on a remote host
207 */
208void
209logmessage(int pri, const char *host, const char *svcname, const char *buf)
210{
211	static struct socks *socks;
212	static int nsock = 0;
213	struct addrinfo hints, *res, *r;
214	char *line;
215	int maxs, len, sock, error, i, lsent;
216
217	if (host == NULL) {
218		syslog(pri, "%s", buf);
219		return;
220	}
221
222	if (nsock <= 0) {	/* set up socket stuff */
223		/* resolve hostname */
224		memset(&hints, 0, sizeof(hints));
225		hints.ai_family = family;
226		hints.ai_socktype = SOCK_DGRAM;
227		error = getaddrinfo(host, svcname, &hints, &res);
228		if (error == EAI_SERVICE) {
229			warnx("%s/udp: unknown service", svcname);
230			error = getaddrinfo(host, "514", &hints, &res);
231		}
232		if (error)
233			errx(1, "%s: %s", gai_strerror(error), host);
234		/* count max number of sockets we may open */
235		for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
236		socks = malloc(maxs * sizeof(struct socks));
237		if (!socks)
238			errx(1, "couldn't allocate memory for sockets");
239		for (r = res; r; r = r->ai_next) {
240			sock = socket(r->ai_family, r->ai_socktype,
241				      r->ai_protocol);
242			if (sock < 0)
243				continue;
244			memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen);
245			socks[nsock].addrlen = r->ai_addrlen;
246			socks[nsock++].sock = sock;
247		}
248		freeaddrinfo(res);
249		if (nsock <= 0)
250			errx(1, "socket");
251	}
252
253	if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1)
254		errx(1, "asprintf");
255
256	lsent = -1;
257	for (i = 0; i < nsock; ++i) {
258		lsent = sendto(socks[i].sock, line, len, 0,
259			       (struct sockaddr *)&socks[i].addr,
260			       socks[i].addrlen);
261		if (lsent == len && !send_to_all)
262			break;
263	}
264	if (lsent != len) {
265		if (lsent == -1)
266			warn ("sendto");
267		else
268			warnx ("sendto: short send - %d bytes", lsent);
269	}
270
271	free(line);
272}
273#endif /* __APPLE__ */
274
275/*
276 *  Decode a symbolic name to a numeric value
277 */
278int
279pencode(char *s)
280{
281	char *save;
282	int fac, lev;
283
284	for (save = s; *s && *s != '.'; ++s);
285	if (*s) {
286		*s = '\0';
287		fac = decode(save, facilitynames);
288		if (fac < 0)
289			errx(1, "unknown facility name: %s", save);
290		*s++ = '.';
291	}
292	else {
293		fac = 0;
294		s = save;
295	}
296	lev = decode(s, prioritynames);
297	if (lev < 0)
298		errx(1, "unknown priority name: %s", save);
299	return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
300}
301
302int
303decode(char *name, CODE *codetab)
304{
305	CODE *c;
306
307	if (isdigit(*name))
308		return (atoi(name));
309
310	for (c = codetab; c->c_name; c++)
311		if (!strcasecmp(name, c->c_name))
312			return (c->c_val);
313
314	return (-1);
315}
316
317static void
318usage(void)
319{
320	(void)fprintf(stderr, "usage: %s\n",
321#ifdef __APPLE__
322	    "logger [-is] [-f file] [-p pri] [-t tag]\n"
323#else
324	    "logger [-46Ais] [-f file] [-h host] [-P port] [-p pri] [-t tag]\n"
325#endif
326	    "              [message ...]"
327	    );
328	exit(1);
329}
330