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 1.4 2005/02/25 18:08:05 liamfoy Exp $
39 #include <sys/types.h>
40 #include <sys/socket.h>
53 static int decode(const char *, CODE *);
54 static int pencode(char *);
55 static void logmessage(int, const char *, const char *);
56 static void usage(void);
61 struct sockaddr_storage addr;
65 int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
67 int family = PF_INET; /* protocol family (IPv4 only) */
69 int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */
72 * logger -- read and log utility
74 * Reads from an input and arranges to write the result on the system
78 main(int argc, char **argv)
80 int ch, logflags, pri;
81 char *tag, *host, buf[1024];
85 pri = LOG_USER | LOG_NOTICE;
88 while ((ch = getopt(argc, argv, "46Af:h:ip:st:")) != -1)
101 case 'f': /* file to log */
102 if (freopen(optarg, "r", stdin) == NULL)
103 err(1, "%s", optarg);
105 case 'h': /* hostname to deliver to */
108 case 'i': /* log process id also */
111 case 'p': /* priority */
112 pri = pencode(optarg);
114 case 's': /* log to standard error */
115 logflags |= LOG_PERROR;
127 /* setup for logging */
128 openlog(tag ? tag : getlogin(), logflags, 0);
131 /* log input line if appropriate */
136 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
138 if (p + len > endp && p > buf) {
139 logmessage(pri, host, buf);
142 if (len > sizeof(buf) - 1)
143 logmessage(pri, host, *argv++);
147 bcopy(*argv++, p, len);
152 logmessage(pri, host, buf);
154 while (fgets(buf, sizeof(buf), stdin) != NULL)
155 logmessage(pri, host, buf);
160 * Send the message to syslog, either on the local host, or on a remote host
163 logmessage(int pri, const char *host, const char *buf)
165 static struct socks *socks;
166 static int nsock = 0;
167 struct addrinfo hints, *res, *r;
169 int maxs, len, sock, error, i, lsent = 0;
172 syslog(pri, "%s", buf);
176 if (nsock <= 0) { /* set up socket stuff */
177 /* resolve hostname */
178 memset(&hints, 0, sizeof(hints));
179 hints.ai_family = family;
180 hints.ai_socktype = SOCK_DGRAM;
181 error = getaddrinfo(host, "syslog", &hints, &res);
182 if (error == EAI_SERVICE) {
183 warnx ("syslog/udp: unknown service"); /* not fatal */
184 error = getaddrinfo(host, "514", &hints, &res);
187 errx(1, "%s: %s", gai_strerror(error), host);
188 /* count max number of sockets we may open */
189 for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
190 socks = malloc(maxs * sizeof(struct socks));
192 err(1, "couldn't allocate memory for sockets");
193 for (r = res; r; r = r->ai_next) {
194 sock = socket(r->ai_family, r->ai_socktype,
198 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen);
199 socks[nsock].addrlen = r->ai_addrlen;
200 socks[nsock++].sock = sock;
207 if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1)
210 for (i = 0; i < nsock; ++i) {
211 lsent = sendto(socks[i].sock, line, len, 0,
212 (struct sockaddr *)&socks[i].addr,
214 if (lsent == len && !send_to_all)
224 * Decode a symbolic name to a numeric value
232 for (save = s; *s && *s != '.'; ++s);
235 fac = decode(save, facilitynames);
237 errx(1, "unknown facility name: %s", save);
244 lev = decode(s, prioritynames);
246 errx(1, "unknown priority name: %s", save);
247 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
251 decode(const char *name, CODE *codetab)
258 for (c = codetab; c->c_name; c++)
259 if (!strcasecmp(name, c->c_name))
268 fprintf(stderr, "usage: %s\n",
269 "logger [-46Ais] [-f file] [-h host] [-p pri] [-t tag] [message ...]");