1: /* $NetBSD: logger.c,v 1.4 2006/09/09 16:22:09 manu Exp $ */
2:
3: /* $KAME: logger.c,v 1.9 2002/09/03 14:37:03 itojun Exp $ */
4:
5: /*
6: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. Neither the name of the project nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: */
33:
34: #include "config.h"
35:
36: #include <sys/types.h>
37: #include <sys/param.h>
38:
39: #include <stdlib.h>
40: #include <stdio.h>
41: #include <string.h>
42: #include <errno.h>
43: #ifdef HAVE_STDARG_H
44: #include <stdarg.h>
45: #else
46: #include <varargs.h>
47: #endif
48: #if TIME_WITH_SYS_TIME
49: # include <sys/time.h>
50: # include <time.h>
51: #else
52: # if HAVE_SYS_TIME_H
53: # include <sys/time.h>
54: # else
55: # include <time.h>
56: # endif
57: #endif
58:
59: #include "logger.h"
60: #include "var.h"
61: #include "gcmalloc.h"
62:
63: struct log *
64: log_open(siz, fname)
65: size_t siz;
66: char *fname;
67: {
68: struct log *p;
69:
70: p = (struct log *)racoon_malloc(sizeof(*p));
71: if (p == NULL)
72: return NULL;
73: memset(p, 0, sizeof(*p));
74:
75: p->buf = (char **)racoon_malloc(sizeof(char *) * siz);
76: if (p->buf == NULL) {
77: racoon_free(p);
78: return NULL;
79: }
80: memset(p->buf, 0, sizeof(char *) * siz);
81:
82: p->tbuf = (time_t *)racoon_malloc(sizeof(time_t *) * siz);
83: if (p->tbuf == NULL) {
84: racoon_free(p->buf);
85: racoon_free(p);
86: return NULL;
87: }
88: memset(p->tbuf, 0, sizeof(time_t *) * siz);
89:
90: p->siz = siz;
91: if (fname)
92: p->fname = racoon_strdup(fname);
93:
94: return p;
95: }
96:
97: /*
98: * append string to ring buffer.
99: * string must be \n-terminated (since we add timestamps).
100: * even if not, we'll add \n to avoid formatting mistake (see log_close()).
101: */
102: void
103: log_add(p, str)
104: struct log *p;
105: char *str;
106: {
107: /* syslog if p->fname == NULL? */
108: if (p->buf[p->head])
109: racoon_free(p->buf[p->head]);
110: p->buf[p->head] = racoon_strdup(str);
111: p->tbuf[p->head] = time(NULL);
112: p->head++;
113: p->head %= p->siz;
114: }
115:
116: /*
117: * write out string to the log file, as is.
118: * \n-termination is up to the caller. if you don't add \n, the file
119: * format may be broken.
120: */
121: int
122: log_print(p, str)
123: struct log *p;
124: char *str;
125: {
126: FILE *fp;
127:
128: if (p->fname == NULL)
129: return -1; /*XXX syslog?*/
130: fp = fopen(p->fname, "a");
131: if (fp == NULL)
132: return -1;
133: fprintf(fp, "%s", str);
134: fclose(fp);
135:
136: return 0;
137: }
138:
139: int
140: log_vprint(struct log *p, const char *fmt, ...)
141: {
142: va_list ap;
143:
144: FILE *fp;
145:
146: if (p->fname == NULL)
147: return -1; /*XXX syslog?*/
148: fp = fopen(p->fname, "a");
149: if (fp == NULL)
150: return -1;
151: va_start(ap, fmt);
152: vfprintf(fp, fmt, ap);
153: va_end(ap);
154:
155: fclose(fp);
156:
157: return 0;
158: }
159:
160: int
161: log_vaprint(struct log *p, const char *fmt, va_list ap)
162: {
163: FILE *fp;
164:
165: if (p->fname == NULL)
166: return -1; /*XXX syslog?*/
167: fp = fopen(p->fname, "a");
168: if (fp == NULL)
169: return -1;
170: vfprintf(fp, fmt, ap);
171: fclose(fp);
172:
173: return 0;
174: }
175:
176: /*
177: * write out content of ring buffer, and reclaim the log structure
178: */
179: int
180: log_close(p)
181: struct log *p;
182: {
183: FILE *fp;
184: int i, j;
185: char ts[256];
186: struct tm *tm;
187:
188: if (p->fname == NULL)
189: goto nowrite;
190: fp = fopen(p->fname, "a");
191: if (fp == NULL)
192: goto nowrite;
193:
194: for (i = 0; i < p->siz; i++) {
195: j = (p->head + i) % p->siz;
196: if (p->buf[j]) {
197: tm = localtime(&p->tbuf[j]);
198: strftime(ts, sizeof(ts), "%B %d %T", tm);
199: fprintf(fp, "%s: %s\n", ts, p->buf[j]);
200: if (*(p->buf[j] + strlen(p->buf[j]) - 1) != '\n')
201: fprintf(fp, "\n");
202: }
203: }
204: fclose(fp);
205:
206: nowrite:
207: log_free(p);
208: return 0;
209: }
210:
211: void
212: log_free(p)
213: struct log *p;
214: {
215: int i;
216:
217: for (i = 0; i < p->siz; i++)
218: racoon_free(p->buf[i]);
219: racoon_free(p->buf);
220: racoon_free(p->tbuf);
221: if (p->fname)
222: racoon_free(p->fname);
223: racoon_free(p);
224: }
225:
226: #ifdef TEST
227: struct log *l;
228:
229: void
230: vatest(const char *fmt, ...)
231: {
232: va_list ap;
233: va_start(ap, fmt);
234: log_vaprint(l, fmt, ap);
235: va_end(ap);
236: }
237:
238: int
239: main(argc, argv)
240: int argc;
241: char **argv;
242: {
243: int i;
244:
245: l = log_open(30, "/tmp/hoge");
246: if (l == NULL)
247: errx(1, "hoge");
248:
249: for (i = 0; i < 50; i++) {
250: log_add(l, "foo");
251: log_add(l, "baa");
252: log_add(l, "baz");
253: }
254: log_print(l, "hoge\n");
255: log_vprint(l, "hoge %s\n", "this is test");
256: vatest("%s %s\n", "this is", "vprint test");
257: abort();
258: log_free(l);
259: }
260:
261: #endif
262:
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