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Sourcecode: ipsec-tools version File versions

logger.c

/*    $KAME: logger.c,v 1.9 2002/09/03 14:37:03 itojun Exp $      */

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 * 
 * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/param.h>

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_STDARG_H
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

#include "logger.h"
#include "var.h"
#include "gcmalloc.h"

struct log *
log_open(siz, fname)
      size_t siz;
      char *fname;
{
      struct log *p;

      p = (struct log *)racoon_malloc(sizeof(*p));
      if (p == NULL)
            return NULL;
      memset(p, 0, sizeof(*p));

      p->buf = (char **)racoon_malloc(sizeof(char *) * siz);
      if (p->buf == NULL) {
            racoon_free(p);
            return NULL;
      }
      memset(p->buf, 0, sizeof(char *) * siz);

      p->tbuf = (time_t *)racoon_malloc(sizeof(time_t *) * siz);
      if (p->tbuf == NULL) {
            racoon_free(p->buf);
            racoon_free(p);
            return NULL;
      }
      memset(p->tbuf, 0, sizeof(time_t *) * siz);

      p->siz = siz;
      if (fname)
            p->fname = strdup(fname);

      return p;
}

/*
 * append string to ring buffer.
 * string must be \n-terminated (since we add timestamps).
 * even if not, we'll add \n to avoid formatting mistake (see log_close()).
 */
void
log_add(p, str)
      struct log *p;
      char *str;
{
      /* syslog if p->fname == NULL? */
      if (p->buf[p->head])
            racoon_free(p->buf[p->head]);
      p->buf[p->head] = strdup(str);
      p->tbuf[p->head] = time(NULL);
      p->head++;
      p->head %= p->siz;
}

/*
 * write out string to the log file, as is.
 * \n-termination is up to the caller.  if you don't add \n, the file
 * format may be broken.
 */
int
log_print(p, str)
      struct log *p;
      char *str;
{
      FILE *fp;

      if (p->fname == NULL)
            return -1;  /*XXX syslog?*/
      fp = fopen(p->fname, "a");
      if (fp == NULL)
            return -1;
      fprintf(fp, "%s", str);
      fclose(fp);

      return 0;
}

int
log_vprint(struct log *p, const char *fmt, ...)
{
      va_list ap;

      FILE *fp;

      if (p->fname == NULL)
            return -1;  /*XXX syslog?*/
      fp = fopen(p->fname, "a");
      if (fp == NULL)
            return -1;
      va_start(ap, fmt);
      vfprintf(fp, fmt, ap);
      va_end(ap);

      fclose(fp);

      return 0;
}

int
log_vaprint(struct log *p, const char *fmt, va_list ap)
{
      FILE *fp;

      if (p->fname == NULL)
            return -1;  /*XXX syslog?*/
      fp = fopen(p->fname, "a");
      if (fp == NULL)
            return -1;
      vfprintf(fp, fmt, ap);
      fclose(fp);

      return 0;
}

/*
 * write out content of ring buffer, and reclaim the log structure
 */
int
log_close(p)
      struct log *p;
{
      FILE *fp;
      int i, j;
      char ts[256];
      struct tm *tm;

      if (p->fname == NULL)
            goto nowrite;
      fp = fopen(p->fname, "a");
      if (fp == NULL)
            goto nowrite;

      for (i = 0; i < p->siz; i++) {
            j = (p->head + i) % p->siz;
            if (p->buf[j]) {
                  tm = localtime(&p->tbuf[j]);
                  strftime(ts, sizeof(ts), "%B %d %T", tm);
                  fprintf(fp, "%s: %s\n", ts, p->buf[j]);
                  if (*(p->buf[j] + strlen(p->buf[j]) - 1) != '\n')
                        fprintf(fp, "\n");
            }
      }
      fclose(fp);

nowrite:
      log_free(p);
      return 0;
}

void
log_free(p)
      struct log *p;
{
      int i;

      for (i = 0; i < p->siz; i++)
            racoon_free(p->buf[i]);
      racoon_free(p->buf);
      racoon_free(p->tbuf);
      if (p->fname)
            racoon_free(p->fname);
      racoon_free(p);
}

#ifdef TEST
struct log *l;

void
vatest(const char *fmt, ...)
{
      va_list ap;
      va_start(ap, fmt);
      log_vaprint(l, fmt, ap);
      va_end(ap);
}

int
main(argc, argv)
      int argc;
      char **argv;
{
      int i;

      l = log_open(30, "/tmp/hoge");
      if (l == NULL)
            errx(1, "hoge");

      for (i = 0; i < 50; i++) {
            log_add(l, "foo");
            log_add(l, "baa");
            log_add(l, "baz");
      }
      log_print(l, "hoge\n");
      log_vprint(l, "hoge %s\n", "this is test");
      vatest("%s %s\n", "this is", "vprint test");
      abort();
      log_free(l);
}

#endif


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