1/*
2 * dhcpcd - DHCP client daemon
3 * Copyright 2006-2008 Roy Marples <roy@marples.name>
4 * All rights reserved
5
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <ctype.h>
29#include <stdarg.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <string.h>
33#include <syslog.h>
34
35#include "common.h"
36#include "logger.h"
37
38#ifdef ANDROID
39#include <android/log.h>
40#endif
41
42static int loglevel = LOG_INFO;
43static char logprefix[12] = {0};
44
45void
46setloglevel(int level)
47{
48	loglevel = level;
49}
50
51void
52setlogprefix(const char *prefix)
53{
54	strlcpy(logprefix, prefix, sizeof(logprefix));
55}
56
57void
58logger(int level, const char *fmt, ...)
59{
60	va_list p, p2;
61	FILE *f = stderr;
62	size_t len, fmt2len;
63	char *fmt2, *pf;
64
65	va_start(p, fmt);
66#ifdef ANDROID
67	if (level <= loglevel) {
68		if (level <= LOG_ERR) {
69			level = ANDROID_LOG_ERROR;
70		} else {
71			level = ANDROID_LOG_DEBUG;
72		}
73		__android_log_vprint(level, "dhcpcd", fmt, p);
74	}
75#else
76	va_copy(p2, p);
77
78	if (level <= LOG_ERR || level <= loglevel) {
79		fprintf(f, "%s", logprefix);
80		vfprintf(f, fmt, p);
81		fputc('\n', f);
82	}
83
84	if (level < LOG_DEBUG || level <= loglevel) {
85		len = strlen(logprefix);
86		fmt2len = strlen(fmt) + len + 1;
87		fmt2 = pf = malloc(sizeof(char) * fmt2len);
88		if (fmt2) {
89			strlcpy(pf, logprefix, fmt2len);
90			pf += len;
91			strlcpy(pf, fmt, fmt2len - len);
92			vsyslog(level, fmt2, p2);
93			free(fmt2);
94		} else {
95			vsyslog(level, fmt, p2);
96			syslog(LOG_ERR, "logger: memory exhausted");
97			exit(EXIT_FAILURE);
98		}
99	}
100
101	va_end(p2);
102#endif
103	va_end(p);
104}
105