summaryrefslogtreecommitdiffhomepage
path: root/sysklogd/logger.c
blob: d9c3e5048969423d6fb454be3308f89fe76a1aa7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
/* vi: set sw=4 ts=4: */
/*
 * Mini logger implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "libbb.h"

#if !defined CONFIG_SYSLOGD

#define SYSLOG_NAMES
#include <sys/syslog.h>

#else
#include <sys/syslog.h>
#  ifndef __dietlibc__
	/* We have to do this since the header file defines static
	 * structures.  Argh.... bad libc, bad, bad...
	 */
	typedef struct _code {
		char *c_name;
		int c_val;
	} CODE;
	extern CODE prioritynames[];
	extern CODE facilitynames[];
#  endif
#endif

/* Decode a symbolic name to a numeric value
 * this function is based on code
 * Copyright (c) 1983, 1993
 * The Regents of the University of California.  All rights reserved.
 *
 * Original copyright notice is retained at the end of this file.
 */
static int decode(char *name, CODE * codetab)
{
	CODE *c;

	if (isdigit(*name))
		return atoi(name);
	for (c = codetab; c->c_name; c++) {
		if (!strcasecmp(name, c->c_name)) {
			return c->c_val;
		}
	}

	return -1;
}

/* Decode a symbolic name to a numeric value
 * this function is based on code
 * Copyright (c) 1983, 1993
 * The Regents of the University of California.  All rights reserved.
 *
 * Original copyright notice is retained at the end of this file.
 */
static int pencode(char *s)
{
	char *save;
	int lev, fac = LOG_USER;

	for (save = s; *s && *s != '.'; ++s)
		;
	if (*s) {
		*s = '\0';
		fac = decode(save, facilitynames);
		if (fac < 0)
			bb_error_msg_and_die("unknown %s name: %s", "facility", save);
		*s++ = '.';
	} else {
		s = save;
	}
	lev = decode(s, prioritynames);
	if (lev < 0)
		bb_error_msg_and_die("unknown %s name: %s", "priority", save);
	return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
}


int logger_main(int argc, char **argv);
int logger_main(int argc, char **argv)
{
	char *str_p, *str_t;
	int i = 0;
	char name[80];

	/* Fill out the name string early (may be overwritten later) */
	bb_getpwuid(name, geteuid(), sizeof(name));
	str_t = name;

	/* Parse any options */
	getopt32(argc, argv, "p:st:", &str_p, &str_t);

	if (option_mask32 & 0x2) /* -s */
		i |= LOG_PERROR;
	//if (option_mask32 & 0x4) /* -t */
	openlog(str_t, i, 0);
	i = LOG_USER | LOG_NOTICE;
	if (option_mask32 & 0x1) /* -p */
		i = pencode(str_p);

	argc -= optind;
	argv += optind;
	if (!argc) {
#define strbuf bb_common_bufsiz1
		while (fgets(strbuf, BUFSIZ, stdin)) {
			if (strbuf[0]
			 && NOT_LONE_CHAR(strbuf, '\n')
			) {
				/* Neither "" nor "\n" */
				syslog(i, "%s", strbuf);
			}
		}
	} else {
		char *message = NULL;
		int len = 1; /* for NUL */
		int pos = 0;
		do {
			len += strlen(*argv) + 1;
			message = xrealloc(message, len);
			sprintf(message + pos, " %s", *argv),
			pos = len;
		} while (*++argv);
		syslog(i, "%s", message + 1); /* skip leading " " */
	}

	closelog();
	return EXIT_SUCCESS;
}


/*-
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This is the original license statement for the decode and pencode functions.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
 *		ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
 *
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */