1 /* $NetBSD: logger.c,v 1.17 2012/04/27 06:30:48 wiz Exp $ */
2
3 /*
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1983, 1993\
35 The Regents of the University of California. All rights reserved.");
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93";
41 #endif
42 __RCSID("$NetBSD: logger.c,v 1.17 2012/04/27 06:30:48 wiz Exp $");
43 #endif /* not lint */
44
45 #include <errno.h>
46 #include <unistd.h>
47 #include <stdlib.h>
48 #include <stdio.h>
49 #include <ctype.h>
50 #include <string.h>
51 #include <err.h>
52
53 #define SYSLOG_NAMES
54 #include <syslog.h>
55
56 static int decode(const char *, const CODE *);
57 static int pencode(char *);
58 __dead static void usage(void);
59
60 /*
61 * logger -- read and log utility
62 *
63 * Reads from an input and arranges to write the result on the system
64 * log.
65 */
66 int
main(int argc,char * argv[])67 main(int argc, char *argv[])
68 {
69 int ch, logflags, pri;
70 const char *tag;
71 const char *sd = "-";
72 const char *msgid = "-";
73 char buf[1024];
74
75 tag = NULL;
76 pri = LOG_NOTICE;
77 logflags = 0;
78 while ((ch = getopt(argc, argv, "cd:f:im:np:st:")) != -1)
79 switch((char)ch) {
80 case 'c': /* log to console */
81 logflags |= LOG_CONS;
82 break;
83 case 'd': /* structured data field */
84 sd = optarg;
85 break;
86 case 'f': /* file to log */
87 if (freopen(optarg, "r", stdin) == NULL)
88 err(EXIT_FAILURE, "%s", optarg);
89 break;
90 case 'i': /* log process id also */
91 logflags |= LOG_PID;
92 break;
93 case 'm': /* msgid field */
94 msgid = optarg;
95 break;
96 case 'n': /* open log file immediately */
97 logflags |= LOG_NDELAY;
98 break;
99 case 'p': /* priority */
100 pri = pencode(optarg);
101 break;
102 case 's': /* log to standard error */
103 logflags |= LOG_PERROR;
104 break;
105 case 't': /* tag */
106 tag = optarg;
107 break;
108 case '?':
109 default:
110 usage();
111 }
112 argc -= optind;
113 argv += optind;
114
115 /* setup for logging */
116 openlog(tag != NULL ? tag : getlogin(), logflags, 0);
117 (void)fclose(stdout);
118
119 /* log input line if appropriate */
120 if (argc > 0) {
121 char *p, *endp;
122 size_t len;
123
124 for (p = buf, endp = buf + sizeof(buf) - 2; *argv != NULL;) {
125 len = strlen(*argv);
126 if (p + len > endp && p > buf) {
127 syslogp(pri, msgid, sd, "%s", buf);
128 p = buf;
129 }
130 if (len > sizeof(buf) - 1)
131 syslogp(pri, msgid, sd, "%s", *argv++);
132 else {
133 if (p != buf)
134 *p++ = ' ';
135 memmove(p, *argv++, len);
136 *(p += len) = '\0';
137 }
138 }
139 if (p != buf)
140 syslogp(pri, msgid, sd, "%s", buf);
141 } else /* TODO: allow syslog-protocol messages from file/stdin
142 * but that will require parsing the line to split
143 * it into three fields.
144 */
145 while (fgets(buf, sizeof(buf), stdin) != NULL)
146 syslogp(pri, msgid, sd, "%s", buf);
147
148 exit(EXIT_SUCCESS);
149 /* NOTREACHED */
150 }
151
152 /*
153 * Decode a symbolic name to a numeric value
154 */
155 static int
pencode(char * s)156 pencode(char *s)
157 {
158 char *save;
159 int fac, lev;
160
161 for (save = s; *s != '\0' && *s != '.'; ++s)
162 ;
163 if (*s != '\0') {
164 *s = '\0';
165 fac = decode(save, facilitynames);
166 if (fac < 0)
167 errx(EXIT_FAILURE, "unknown facility name: %s", save);
168 *s++ = '.';
169 } else {
170 fac = 0;
171 s = save;
172 }
173 lev = decode(s, prioritynames);
174 if (lev < 0)
175 errx(EXIT_FAILURE, "unknown priority name: %s", s);
176 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
177 }
178
179 static int
decode(const char * name,const CODE * codetab)180 decode(const char *name, const CODE *codetab)
181 {
182 const CODE *c;
183
184 if (isdigit((unsigned char)*name))
185 return (atoi(name));
186
187 for (c = codetab; c->c_name != NULL; c++)
188 if (strcasecmp(name, c->c_name) == 0)
189 return (c->c_val);
190
191 return (-1);
192 }
193
194 static void
usage(void)195 usage(void)
196 {
197
198 (void)fprintf(stderr,
199 "Usage: %s [-cins] [-d SD] [-f file] [-m msgid] "
200 "[-p pri] [-t tag] [message ...]\n",
201 getprogname());
202 exit(EXIT_FAILURE);
203 }
204