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
35static const char copyright[] =
36"@(#) Copyright (c) 1983, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
38#endif /* not lint */
39
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40#ifndef lint
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40#if 0
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| 41#ifndef lint |
42static char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93";
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43#endif
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43#endif /* not lint */
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44#endif
45 |
46#include <sys/cdefs.h>
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46__FBSDID("$FreeBSD: head/usr.bin/logger/logger.c 102944 2002-09-04 23:29:10Z dwmalone $");
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| 47__FBSDID("$FreeBSD: head/usr.bin/logger/logger.c 146756 2005-05-29 16:04:46Z charnier $"); |
48
49#include <sys/types.h>
50#include <sys/socket.h>
51#include <netinet/in.h>
52
53#include <ctype.h>
54#include <err.h>
55#include <netdb.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
59#include <unistd.h>
60
61#define SYSLOG_NAMES
62#include <syslog.h>
63
64int decode(char *, CODE *);
65int pencode(char *);
66static void logmessage(int, char *, char *);
67static void usage(void);
68
69struct socks {
70 int sock;
71 int addrlen;
72 struct sockaddr_storage addr;
73};
74
75#ifdef INET6
76int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
77#else
78int family = PF_INET; /* protocol family (IPv4 only) */
79#endif
80int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */
81
82/*
83 * logger -- read and log utility
84 *
85 * Reads from an input and arranges to write the result on the system
86 * log.
87 */
88int
89main(int argc, char *argv[])
90{
91 int ch, logflags, pri;
92 char *tag, *host, buf[1024];
93
94 tag = NULL;
95 host = NULL;
96 pri = LOG_USER | LOG_NOTICE;
97 logflags = 0;
98 unsetenv("TZ");
99 while ((ch = getopt(argc, argv, "46Af:h:ip:st:")) != -1)
100 switch((char)ch) {
101 case '4':
102 family = PF_INET;
103 break;
104#ifdef INET6
105 case '6':
106 family = PF_INET6;
107 break;
108#endif
109 case 'A':
110 send_to_all++;
111 break;
112 case 'f': /* file to log */
113 if (freopen(optarg, "r", stdin) == NULL)
114 err(1, "%s", optarg);
115 break;
116 case 'h': /* hostname to deliver to */
117 host = optarg;
118 break;
119 case 'i': /* log process id also */
120 logflags |= LOG_PID;
121 break;
122 case 'p': /* priority */
123 pri = pencode(optarg);
124 break;
125 case 's': /* log to standard error */
126 logflags |= LOG_PERROR;
127 break;
128 case 't': /* tag */
129 tag = optarg;
130 break;
131 case '?':
132 default:
133 usage();
134 }
135 argc -= optind;
136 argv += optind;
137
138 /* setup for logging */
139 openlog(tag ? tag : getlogin(), logflags, 0);
140 (void) fclose(stdout);
141
142 /* log input line if appropriate */
143 if (argc > 0) {
144 char *p, *endp;
145 size_t len;
146
147 for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
148 len = strlen(*argv);
149 if (p + len > endp && p > buf) {
150 logmessage(pri, host, buf);
151 p = buf;
152 }
153 if (len > sizeof(buf) - 1)
154 logmessage(pri, host, *argv++);
155 else {
156 if (p != buf)
157 *p++ = ' ';
158 bcopy(*argv++, p, len);
159 *(p += len) = '\0';
160 }
161 }
162 if (p != buf)
163 logmessage(pri, host, buf);
164 } else
165 while (fgets(buf, sizeof(buf), stdin) != NULL)
166 logmessage(pri, host, buf);
167 exit(0);
168}
169
170/*
171 * Send the message to syslog, either on the local host, or on a remote host
172 */
173void
174logmessage(int pri, char *host, char *buf)
175{
176 static struct socks *socks;
177 static int nsock = 0;
178 struct addrinfo hints, *res, *r;
179 char *line;
180 int maxs, len, sock, error, i, lsent;
181
182 if (host == NULL) {
183 syslog(pri, "%s", buf);
184 return;
185 }
186
187 if (nsock <= 0) { /* set up socket stuff */
188 /* resolve hostname */
189 memset(&hints, 0, sizeof(hints));
190 hints.ai_family = family;
191 hints.ai_socktype = SOCK_DGRAM;
192 error = getaddrinfo(host, "syslog", &hints, &res);
193 if (error == EAI_SERVICE) {
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193 warnx ("syslog/udp: unknown service"); /* not fatal */
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| 194 warnx("syslog/udp: unknown service"); /* not fatal */ |
195 error = getaddrinfo(host, "514", &hints, &res);
196 }
197 if (error)
198 errx(1, "%s: %s", gai_strerror(error), host);
199 /* count max number of sockets we may open */
200 for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
201 socks = malloc(maxs * sizeof(struct socks));
202 if (!socks)
203 errx(1, "couldn't allocate memory for sockets");
204 for (r = res; r; r = r->ai_next) {
205 sock = socket(r->ai_family, r->ai_socktype,
206 r->ai_protocol);
207 if (sock < 0)
208 continue;
209 memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen);
210 socks[nsock].addrlen = r->ai_addrlen;
211 socks[nsock++].sock = sock;
212 }
213 freeaddrinfo(res);
214 if (nsock <= 0)
215 errx(1, "socket");
216 }
217
218 if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1)
219 errx(1, "asprintf");
220
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| 221 lsent = -1; |
222 for (i = 0; i < nsock; ++i) {
223 lsent = sendto(socks[i].sock, line, len, 0,
224 (struct sockaddr *)&socks[i].addr,
225 socks[i].addrlen);
226 if (lsent == len && !send_to_all)
227 break;
228 }
229 if (lsent != len) {
230 if (lsent == -1)
231 warn ("sendto");
232 else
233 warnx ("sendto: short send - %d bytes", lsent);
234 }
235
236 free(line);
237}
238
239/*
240 * Decode a symbolic name to a numeric value
241 */
242int
243pencode(char *s)
244{
245 char *save;
246 int fac, lev;
247
248 for (save = s; *s && *s != '.'; ++s);
249 if (*s) {
250 *s = '\0';
251 fac = decode(save, facilitynames);
252 if (fac < 0)
253 errx(1, "unknown facility name: %s", save);
254 *s++ = '.';
255 }
256 else {
257 fac = 0;
258 s = save;
259 }
260 lev = decode(s, prioritynames);
261 if (lev < 0)
262 errx(1, "unknown priority name: %s", save);
263 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
264}
265
266int
267decode(char *name, CODE *codetab)
268{
269 CODE *c;
270
271 if (isdigit(*name))
272 return (atoi(name));
273
274 for (c = codetab; c->c_name; c++)
275 if (!strcasecmp(name, c->c_name))
276 return (c->c_val);
277
278 return (-1);
279}
280
281static void
282usage(void)
283{
284 (void)fprintf(stderr, "usage: %s\n",
285 "logger [-46Ais] [-f file] [-h host] [-p pri] [-t tag] [message ...]"
286 );
287 exit(1);
288}
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