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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)logger.c 8.1 (Berkeley) 6/6/93
31 * $FreeBSD: src/usr.bin/logger/logger.c,v 1.5.2.3 2001/09/06 17:38:57 ru Exp $
32 * $DragonFly: src/usr.bin/logger/logger.c,v 1.4 2005/02/25 18:08:05 liamfoy Exp $
35 #include <sys/types.h>
36 #include <sys/socket.h>
49 static int decode(const char *, CODE *);
50 static int pencode(char *);
51 static void logmessage(int, const char *, const char *);
52 static void usage(void);
57 struct sockaddr_storage addr;
61 int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
63 int family = PF_INET; /* protocol family (IPv4 only) */
65 int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */
68 * logger -- read and log utility
70 * Reads from an input and arranges to write the result on the system
74 main(int argc, char **argv)
76 int ch, logflags, pri;
77 char *tag, *host, buf[1024];
81 pri = LOG_USER | LOG_NOTICE;
84 while ((ch = getopt(argc, argv, "46Af:h:ip:st:")) != -1)
97 case 'f': /* file to log */
98 if (freopen(optarg, "r", stdin) == NULL)
101 case 'h': /* hostname to deliver to */
104 case 'i': /* log process id also */
107 case 'p': /* priority */
108 pri = pencode(optarg);
110 case 's': /* log to standard error */
111 logflags |= LOG_PERROR;
123 /* setup for logging */
124 openlog(tag ? tag : getlogin(), logflags, 0);
127 /* log input line if appropriate */
132 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
134 if (p + len > endp && p > buf) {
135 logmessage(pri, host, buf);
138 if (len > sizeof(buf) - 1)
139 logmessage(pri, host, *argv++);
143 bcopy(*argv++, p, len);
148 logmessage(pri, host, buf);
150 while (fgets(buf, sizeof(buf), stdin) != NULL)
151 logmessage(pri, host, buf);
156 * Send the message to syslog, either on the local host, or on a remote host
159 logmessage(int pri, const char *host, const char *buf)
161 static struct socks *socks;
162 static int nsock = 0;
163 struct addrinfo hints, *res, *r;
165 int maxs, len, sock, error, i, lsent = 0;
168 syslog(pri, "%s", buf);
172 if (nsock <= 0) { /* set up socket stuff */
173 /* resolve hostname */
174 memset(&hints, 0, sizeof(hints));
175 hints.ai_family = family;
176 hints.ai_socktype = SOCK_DGRAM;
177 error = getaddrinfo(host, "syslog", &hints, &res);
178 if (error == EAI_SERVICE) {
179 warnx ("syslog/udp: unknown service"); /* not fatal */
180 error = getaddrinfo(host, "514", &hints, &res);
183 errx(1, "%s: %s", gai_strerror(error), host);
184 /* count max number of sockets we may open */
185 for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
186 socks = malloc(maxs * sizeof(struct socks));
188 err(1, "couldn't allocate memory for sockets");
189 for (r = res; r; r = r->ai_next) {
190 sock = socket(r->ai_family, r->ai_socktype,
194 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen);
195 socks[nsock].addrlen = r->ai_addrlen;
196 socks[nsock++].sock = sock;
203 if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1)
206 for (i = 0; i < nsock; ++i) {
207 lsent = sendto(socks[i].sock, line, len, 0,
208 (struct sockaddr *)&socks[i].addr,
210 if (lsent == len && !send_to_all)
220 * Decode a symbolic name to a numeric value
228 for (save = s; *s && *s != '.'; ++s);
231 fac = decode(save, facilitynames);
233 errx(1, "unknown facility name: %s", save);
240 lev = decode(s, prioritynames);
242 errx(1, "unknown priority name: %s", save);
243 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
247 decode(const char *name, CODE *codetab)
254 for (c = codetab; c->c_name; c++)
255 if (!strcasecmp(name, c->c_name))
264 fprintf(stderr, "usage: %s\n",
265 "logger [-46Ais] [-f file] [-h host] [-p pri] [-t tag] [message ...]");