2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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 $
39 #include <sys/types.h>
40 #include <sys/socket.h>
41 #include <netinet/in.h>
54 int decode(char *, CODE *);
56 static void logmessage(int, char *, char *);
57 static void usage(void);
62 struct sockaddr_storage addr;
66 int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
68 int family = PF_INET; /* protocol family (IPv4 only) */
70 int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */
73 * logger -- read and log utility
75 * Reads from an input and arranges to write the result on the system
79 main(int argc, char **argv)
81 int ch, logflags, pri;
82 char *tag, *host, buf[1024];
86 pri = LOG_USER | LOG_NOTICE;
89 while ((ch = getopt(argc, argv, "46Af:h:ip:st:")) != -1)
102 case 'f': /* file to log */
103 if (freopen(optarg, "r", stdin) == NULL)
104 err(1, "%s", optarg);
106 case 'h': /* hostname to deliver to */
109 case 'i': /* log process id also */
112 case 'p': /* priority */
113 pri = pencode(optarg);
115 case 's': /* log to standard error */
116 logflags |= LOG_PERROR;
128 /* setup for logging */
129 openlog(tag ? tag : getlogin(), logflags, 0);
130 (void) fclose(stdout);
132 /* log input line if appropriate */
134 register char *p, *endp;
137 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
139 if (p + len > endp && p > buf) {
140 logmessage(pri, host, buf);
143 if (len > sizeof(buf) - 1)
144 logmessage(pri, host, *argv++);
148 bcopy(*argv++, p, len);
153 logmessage(pri, host, buf);
155 while (fgets(buf, sizeof(buf), stdin) != NULL)
156 logmessage(pri, host, buf);
161 * Send the message to syslog, either on the local host, or on a remote host
164 logmessage(int pri, char *host, char *buf)
166 static struct socks *socks;
167 static int nsock = 0;
168 struct addrinfo hints, *res, *r;
170 int maxs, len, sock, error, i, lsent;
173 syslog(pri, "%s", buf);
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);
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));
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,
199 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen);
200 socks[nsock].addrlen = r->ai_addrlen;
201 socks[nsock++].sock = sock;
208 if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1)
211 for (i = 0; i < nsock; ++i) {
212 lsent = sendto(socks[i].sock, line, len, 0,
213 (struct sockaddr *)&socks[i].addr,
215 if (lsent == len && !send_to_all)
225 * Decode a symbolic name to a numeric value
228 pencode(register char *s)
233 for (save = s; *s && *s != '.'; ++s);
236 fac = decode(save, facilitynames);
238 errx(1, "unknown facility name: %s", save);
245 lev = decode(s, prioritynames);
247 errx(1, "unknown priority name: %s", save);
248 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
252 decode(char *name, CODE *codetab)
259 for (c = codetab; c->c_name; c++)
260 if (!strcasecmp(name, c->c_name))
269 (void)fprintf(stderr, "usage: %s\n",
270 "logger [-46Ais] [-f file] [-h host] [-p pri] [-t tag] [message ...]"