1/*	$KAME: logger.c,v 1.8 2001/04/03 15:51:56 thorpej Exp $	*/
2
3/*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * 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 project 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 PROJECT 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 PROJECT 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/types.h>
33#include <sys/param.h>
34
35#include <stdlib.h>
36#include <stdio.h>
37#include <string.h>
38#include <errno.h>
39#ifdef HAVE_STDARG_H
40#include <stdarg.h>
41#else
42#include <varargs.h>
43#endif
44#if TIME_WITH_SYS_TIME
45# include <sys/time.h>
46# include <time.h>
47#else
48# if HAVE_SYS_TIME_H
49#  include <sys/time.h>
50# else
51#  include <time.h>
52# endif
53#endif
54
55#include "logger.h"
56#include "var.h"
57#include "gcmalloc.h"
58
59struct log *
60log_open(siz, fname)
61	size_t siz;
62	char *fname;
63{
64	struct log *p;
65
66	p = (struct log *)racoon_malloc(sizeof(*p));
67	if (p == NULL)
68		return NULL;
69	memset(p, 0, sizeof(*p));
70
71	p->buf = (char **)racoon_malloc(sizeof(char *) * siz);
72	if (p->buf == NULL) {
73		racoon_free(p);
74		return NULL;
75	}
76	memset(p->buf, 0, sizeof(char *) * siz);
77
78	p->tbuf = (time_t *)racoon_malloc(sizeof(time_t *) * siz);
79	if (p->tbuf == NULL) {
80		racoon_free(p);
81		racoon_free(p->buf);
82		return NULL;
83	}
84	memset(p->tbuf, 0, sizeof(time_t *) * siz);
85
86	p->siz = siz;
87	if (fname)
88		p->fname = strdup(fname);
89
90	return p;
91}
92
93/*
94 * append string to ring buffer.
95 * string must be \n-terminated (since we add timestamps).
96 * even if not, we'll add \n to avoid formatting mistake (see log_close()).
97 */
98void
99log_add(p, str)
100	struct log *p;
101	char *str;
102{
103	/* syslog if p->fname == NULL? */
104	if (p->buf[p->head])
105		racoon_free(p->buf[p->head]);
106	p->buf[p->head] = strdup(str);
107	p->tbuf[p->head] = time(NULL);
108	p->head++;
109	p->head %= p->siz;
110}
111
112/*
113 * write out string to the log file, as is.
114 * \n-termination is up to the caller.  if you don't add \n, the file
115 * format may be broken.
116 */
117int
118log_print(p, str)
119	struct log *p;
120	char *str;
121{
122	FILE *fp;
123
124	if (p->fname == NULL)
125		return -1;
126	fp = fopen(p->fname, "a");
127	if (fp == NULL)
128		return -1;
129	fprintf(fp, "%s", str);
130	fclose(fp);
131
132	return 0;
133}
134
135int
136log_vprint(struct log *p, const char *fmt, ...)
137{
138	va_list ap;
139
140	FILE *fp;
141
142	if (p->fname == NULL)
143		return -1;
144	fp = fopen(p->fname, "a");
145	if (fp == NULL)
146		return -1;
147	va_start(ap, fmt);
148	vfprintf(fp, fmt, ap);
149	va_end(ap);
150
151	fclose(fp);
152
153	return 0;
154}
155
156int
157log_vaprint(struct log *p, const char *fmt, va_list ap)
158{
159	FILE *fp;
160
161	if (p->fname == NULL)
162		return -1;
163	fp = fopen(p->fname, "a");
164	if (fp == NULL)
165		return -1;
166	vfprintf(fp, fmt, ap);
167	fclose(fp);
168
169	return 0;
170}
171
172/*
173 * write out content of ring buffer, and reclaim the log structure
174 */
175int
176log_close(p)
177	struct log *p;
178{
179	FILE *fp;
180	int i, j;
181	char ts[256];
182	struct tm *tm;
183
184	if (p->fname == NULL)
185		goto nowrite;
186	fp = fopen(p->fname, "a");
187	if (fp == NULL)
188		goto nowrite;
189
190	for (i = 0; i < p->siz; i++) {
191		j = (p->head + i) % p->siz;
192		if (p->buf[j]) {
193			tm = localtime(&p->tbuf[j]);
194			strftime(ts, sizeof(ts), "%B %d %T", tm);
195			fprintf(fp, "%s: %s\n", ts, p->buf[j]);
196			if (*(p->buf[j] + strlen(p->buf[j]) - 1) != '\n')
197				fprintf(fp, "\n");
198		}
199	}
200	fclose(fp);
201
202nowrite:
203	log_free(p);
204	return 0;
205}
206
207void
208log_free(p)
209	struct log *p;
210{
211	int i;
212
213	for (i = 0; i < p->siz; i++)
214		racoon_free(p->buf[i]);
215	racoon_free(p->buf);
216	racoon_free(p->tbuf);
217	if (p->fname)
218		racoon_free(p->fname);
219	racoon_free(p);
220}
221
222#ifdef TEST
223struct log *l;
224
225void
226vatest(const char *fmt, ...)
227{
228	va_list ap;
229	va_start(ap, fmt);
230	log_vaprint(l, fmt, ap);
231	va_end(ap);
232}
233
234int
235main(argc, argv)
236	int argc;
237	char **argv;
238{
239	int i;
240
241	l = log_open(30, "/tmp/hoge");
242	if (l == NULL)
243		errx(1, "hoge");
244
245	for (i = 0; i < 50; i++) {
246		log_add(l, "foo");
247		log_add(l, "baa");
248		log_add(l, "baz");
249	}
250	log_print(l, "hoge\n");
251	log_vprint(l, "hoge %s\n", "this is test");
252	vatest("%s %s\n", "this is", "vprint test");
253	abort();
254	log_free(l);
255}
256
257#endif
258