1 |
|
|
/* $OpenBSD: logger.c,v 1.17 2016/03/28 18:18:52 chl Exp $ */ |
2 |
|
|
/* $NetBSD: logger.c,v 1.4 1994/12/22 06:27:00 jtc Exp $ */ |
3 |
|
|
|
4 |
|
|
/* |
5 |
|
|
* Copyright (c) 1983, 1993 |
6 |
|
|
* The Regents of the University of California. All rights reserved. |
7 |
|
|
* |
8 |
|
|
* Redistribution and use in source and binary forms, with or without |
9 |
|
|
* modification, are permitted provided that the following conditions |
10 |
|
|
* are met: |
11 |
|
|
* 1. Redistributions of source code must retain the above copyright |
12 |
|
|
* notice, this list of conditions and the following disclaimer. |
13 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
14 |
|
|
* notice, this list of conditions and the following disclaimer in the |
15 |
|
|
* documentation and/or other materials provided with the distribution. |
16 |
|
|
* 3. Neither the name of the University nor the names of its contributors |
17 |
|
|
* may be used to endorse or promote products derived from this software |
18 |
|
|
* without specific prior written permission. |
19 |
|
|
* |
20 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
21 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
22 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
23 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
24 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
25 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
26 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
27 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
28 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
29 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
30 |
|
|
* SUCH DAMAGE. |
31 |
|
|
*/ |
32 |
|
|
|
33 |
|
|
#include <errno.h> |
34 |
|
|
#include <unistd.h> |
35 |
|
|
#include <limits.h> |
36 |
|
|
#include <stdlib.h> |
37 |
|
|
#include <stdio.h> |
38 |
|
|
#include <ctype.h> |
39 |
|
|
#include <string.h> |
40 |
|
|
#include <err.h> |
41 |
|
|
|
42 |
|
|
#define SYSLOG_NAMES |
43 |
|
|
#include <syslog.h> |
44 |
|
|
|
45 |
|
|
int decode(char *, CODE *); |
46 |
|
|
int pencode(char *); |
47 |
|
|
void usage(void); |
48 |
|
|
|
49 |
|
|
/* |
50 |
|
|
* logger -- read and log utility |
51 |
|
|
* |
52 |
|
|
* Reads from an input and arranges to write the result on the system |
53 |
|
|
* log. |
54 |
|
|
*/ |
55 |
|
|
int |
56 |
|
|
main(int argc, char *argv[]) |
57 |
|
|
{ |
58 |
|
|
int ch, logflags, pri; |
59 |
|
|
char *tag, buf[1024]; |
60 |
|
|
|
61 |
|
|
tag = NULL; |
62 |
|
|
pri = LOG_NOTICE; |
63 |
|
|
logflags = 0; |
64 |
|
|
while ((ch = getopt(argc, argv, "f:ip:st:")) != -1) |
65 |
|
|
switch(ch) { |
66 |
|
|
case 'f': /* file to log */ |
67 |
|
|
if (freopen(optarg, "r", stdin) == NULL) { |
68 |
|
|
(void)fprintf(stderr, "logger: %s: %s.\n", |
69 |
|
|
optarg, strerror(errno)); |
70 |
|
|
exit(1); |
71 |
|
|
} |
72 |
|
|
break; |
73 |
|
|
case 'i': /* log process id also */ |
74 |
|
|
logflags |= LOG_PID; |
75 |
|
|
break; |
76 |
|
|
case 'p': /* priority */ |
77 |
|
|
pri = pencode(optarg); |
78 |
|
|
break; |
79 |
|
|
case 's': /* log to standard error */ |
80 |
|
|
logflags |= LOG_PERROR; |
81 |
|
|
break; |
82 |
|
|
case 't': /* tag */ |
83 |
|
|
tag = optarg; |
84 |
|
|
break; |
85 |
|
|
case '?': |
86 |
|
|
default: |
87 |
|
|
usage(); |
88 |
|
|
} |
89 |
|
|
argc -= optind; |
90 |
|
|
argv += optind; |
91 |
|
|
|
92 |
|
|
/* setup for logging */ |
93 |
|
|
openlog(tag ? tag : getlogin(), logflags, 0); |
94 |
|
|
(void) fclose(stdout); |
95 |
|
|
|
96 |
|
|
if (pledge("stdio wpath cpath rpath", NULL) == -1) |
97 |
|
|
err(1, "pledge"); |
98 |
|
|
|
99 |
|
|
/* log input line if appropriate */ |
100 |
|
|
if (argc > 0) { |
101 |
|
|
char *p, *endp; |
102 |
|
|
size_t len; |
103 |
|
|
|
104 |
|
|
for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { |
105 |
|
|
len = strlen(*argv); |
106 |
|
|
if (p + len > endp && p > buf) { |
107 |
|
|
syslog(pri, "%s", buf); |
108 |
|
|
p = buf; |
109 |
|
|
} |
110 |
|
|
if (len > sizeof(buf) - 1) |
111 |
|
|
syslog(pri, "%s", *argv++); |
112 |
|
|
else { |
113 |
|
|
if (p != buf) |
114 |
|
|
*p++ = ' '; |
115 |
|
|
bcopy(*argv++, p, len); |
116 |
|
|
*(p += len) = '\0'; |
117 |
|
|
} |
118 |
|
|
} |
119 |
|
|
if (p != buf) |
120 |
|
|
syslog(pri, "%s", buf); |
121 |
|
|
} else |
122 |
|
|
while (fgets(buf, sizeof(buf), stdin) != NULL) |
123 |
|
|
syslog(pri, "%s", buf); |
124 |
|
|
exit(0); |
125 |
|
|
} |
126 |
|
|
|
127 |
|
|
/* |
128 |
|
|
* Decode a symbolic name to a numeric value |
129 |
|
|
*/ |
130 |
|
|
int |
131 |
|
|
pencode(char *s) |
132 |
|
|
{ |
133 |
|
|
char *save; |
134 |
|
|
int fac, lev; |
135 |
|
|
|
136 |
|
|
for (save = s; *s && *s != '.'; ++s); |
137 |
|
|
if (*s) { |
138 |
|
|
*s = '\0'; |
139 |
|
|
fac = decode(save, facilitynames); |
140 |
|
|
if (fac < 0) { |
141 |
|
|
(void)fprintf(stderr, |
142 |
|
|
"logger: unknown facility name: %s.\n", save); |
143 |
|
|
exit(1); |
144 |
|
|
} |
145 |
|
|
*s++ = '.'; |
146 |
|
|
} |
147 |
|
|
else { |
148 |
|
|
fac = 0; |
149 |
|
|
s = save; |
150 |
|
|
} |
151 |
|
|
lev = decode(s, prioritynames); |
152 |
|
|
if (lev < 0) { |
153 |
|
|
(void)fprintf(stderr, |
154 |
|
|
"logger: unknown priority name: %s.\n", save); |
155 |
|
|
exit(1); |
156 |
|
|
} |
157 |
|
|
return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); |
158 |
|
|
} |
159 |
|
|
|
160 |
|
|
int |
161 |
|
|
decode(char *name, CODE *codetab) |
162 |
|
|
{ |
163 |
|
|
CODE *c; |
164 |
|
|
|
165 |
|
|
if (isdigit((unsigned char)*name)) { |
166 |
|
|
const char *errstr; |
167 |
|
|
int n = strtonum(name, 0, INT_MAX, &errstr); |
168 |
|
|
if (!errstr) |
169 |
|
|
return (n); |
170 |
|
|
} |
171 |
|
|
|
172 |
|
|
for (c = codetab; c->c_name; c++) |
173 |
|
|
if (!strcasecmp(name, c->c_name)) |
174 |
|
|
return (c->c_val); |
175 |
|
|
|
176 |
|
|
return (-1); |
177 |
|
|
} |
178 |
|
|
|
179 |
|
|
void |
180 |
|
|
usage(void) |
181 |
|
|
{ |
182 |
|
|
(void)fprintf(stderr, |
183 |
|
|
"usage: logger [-is] [-f file] [-p pri] [-t tag] [message ...]\n"); |
184 |
|
|
exit(1); |
185 |
|
|
} |