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