1/* vi: set sw=4 ts=4: */
2/*
3 * Mini logger implementation for busybox
4 *
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8 */
9
10/*
11 * Done in syslogd_and_logger.c:
12#include "libbb.h"
13#define SYSLOG_NAMES
14#define SYSLOG_NAMES_CONST
15#include <syslog.h>
16*/
17
18/* Decode a symbolic name to a numeric value
19 * this function is based on code
20 * Copyright (c) 1983, 1993
21 * The Regents of the University of California.  All rights reserved.
22 *
23 * Original copyright notice is retained at the end of this file.
24 */
25static int decode(char *name, const CODE *codetab)
26{
27	const CODE *c;
28
29	if (isdigit(*name))
30		return atoi(name);
31	for (c = codetab; c->c_name; c++) {
32		if (!strcasecmp(name, c->c_name)) {
33			return c->c_val;
34		}
35	}
36
37	return -1;
38}
39
40/* Decode a symbolic name to a numeric value
41 * this function is based on code
42 * Copyright (c) 1983, 1993
43 * The Regents of the University of California.  All rights reserved.
44 *
45 * Original copyright notice is retained at the end of this file.
46 */
47static int pencode(char *s)
48{
49	char *save;
50	int lev, fac = LOG_USER;
51
52	for (save = s; *s && *s != '.'; ++s)
53		;
54	if (*s) {
55		*s = '\0';
56		fac = decode(save, facilitynames);
57		if (fac < 0)
58			bb_error_msg_and_die("unknown %s name: %s", "facility", save);
59		*s++ = '.';
60	} else {
61		s = save;
62	}
63	lev = decode(s, prioritynames);
64	if (lev < 0)
65		bb_error_msg_and_die("unknown %s name: %s", "priority", save);
66	return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
67}
68
69#define strbuf bb_common_bufsiz1
70
71int logger_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
72int logger_main(int argc UNUSED_PARAM, char **argv)
73{
74	char *str_p, *str_t;
75	int opt;
76	int i = 0;
77	FILE *f = NULL;
78
79	/* Fill out the name string early (may be overwritten later) */
80	str_t = uid2uname_utoa(geteuid());
81
82	/* Parse any options */
83	opt = getopt32(argv, "p:st:c", &str_p, &str_t);
84
85	if (opt & 0x2) /* -s */
86		i |= LOG_PERROR;
87	if (opt & 0x8) { /* -c */
88		f = fopen_for_write(DEV_CONSOLE);
89		if (!f)
90			bb_error_msg("can't open console: %d %s\n", errno, strerror(errno));
91	}
92	//if (opt & 0x4) /* -t */
93	openlog(str_t, i, 0);
94	i = LOG_USER | LOG_WARNING;
95	if (opt & 0x1) /* -p */
96		i = pencode(str_p);
97
98	argv += optind;
99	if (!argv[0]) {
100		while (fgets(strbuf, COMMON_BUFSIZE, stdin)) {
101			if (strbuf[0]
102			 && NOT_LONE_CHAR(strbuf, '\n')
103			) {
104				/* Neither "" nor "\n" */
105				syslog(i, "%s", strbuf);
106				if (f)
107					fprintf(f, "%s", strbuf);
108			}
109		}
110	} else {
111		char *message = NULL;
112		int len = 0;
113		int pos = 0;
114		do {
115			len += strlen(*argv) + 1;
116			message = xrealloc(message, len + 1);
117			sprintf(message + pos, " %s", *argv),
118			pos = len;
119		} while (*++argv);
120		syslog(i, "%s", message + 1); /* skip leading " " */
121		if (f)
122			fprintf(f, "%s", message + 1);
123	}
124
125	closelog();
126	if (f)
127		fclose(f);
128	return EXIT_SUCCESS;
129}
130
131/* Clean up. Needed because we are included from syslogd_and_logger.c */
132#undef strbuf
133
134/*-
135 * Copyright (c) 1983, 1993
136 *	The Regents of the University of California.  All rights reserved.
137 *
138 * This is the original license statement for the decode and pencode functions.
139 *
140 * Redistribution and use in source and binary forms, with or without
141 * modification, are permitted provided that the following conditions
142 * are met:
143 * 1. Redistributions of source code must retain the above copyright
144 *    notice, this list of conditions and the following disclaimer.
145 * 2. Redistributions in binary form must reproduce the above copyright
146 *    notice, this list of conditions and the following disclaimer in the
147 *    documentation and/or other materials provided with the distribution.
148 *
149 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
150 *		ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
151 *
152 * 4. Neither the name of the University nor the names of its contributors
153 *    may be used to endorse or promote products derived from this software
154 *    without specific prior written permission.
155 *
156 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
157 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
158 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
159 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
160 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
161 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
162 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
163 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
164 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
165 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
166 * SUCH DAMAGE.
167 */
168