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[unix-history] / usr / src / kerberosIV / krb / log.c

/*
* $Source: /usr/src/kerberosIV/krb/RCS/log.c,v $
* $Author: kfall $
*
* Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
* of Technology.
*
* For copying and distribution information, please see the file
* <mit-copyright.h>.
*/

#ifndef lint
static char *rcsid_log_c =
"$Header: /usr/src/kerberosIV/krb/RCS/log.c,v 4.8 90/06/25 20:56:49 kfall Exp $";
#endif /* lint */

#include <mit-copyright.h>
#include <sys/time.h>
#include <stdio.h>

#include <des.h>
#include <krb.h>
#include <klog.h>

static char *log_name = KRBLOG;
static is_open;

/*
* This file contains three logging routines: set_logfile()
* to determine the file that log entries should be written to;
* and log() and new_log() to write log entries to the file.
*/

/*
* log() is used to add entries to the logfile (see set_logfile()
* below).  Note that it is probably not portable since it makes
* assumptions about what the compiler will do when it is called
* with less than the correct number of arguments which is the
* way it is usually called.
*
* The log entry consists of a timestamp and the given arguments
* printed according to the given "format".
*
* The log file is opened and closed for each log entry.
*
* The return value is undefined.
*/

/*VARARGS1 */
void log(format,a1,a2,a3,a4,a5,a6,a7,a8,a9,a0)
   char *format;
   int a1,a2,a3,a4,a5,a6,a7,a8,a9,a0;
{
   FILE *logfile, *fopen();
   long time(),now;
   struct tm *tm;
   char *month_sname();

   if ((logfile = fopen(log_name,"a")) == NULL)
       return;

   (void) time(&now);
   tm = localtime(&now);

   fprintf(logfile,"%2d-%s-%02d %02d:%02d:%02d ",tm->tm_mday,
           month_sname(tm->tm_mon + 1),tm->tm_year,
           tm->tm_hour, tm->tm_min, tm->tm_sec);
   fprintf(logfile,format,a1,a2,a3,a4,a5,a6,a7,a8,a9,a0);
   fprintf(logfile,"\n");
   (void) fclose(logfile);
   return;
}

/*
* set_logfile() changes the name of the file to which
* messages are logged.  If set_logfile() is not called,
* the logfile defaults to KRBLOG, defined in "krb.h".
*/

set_logfile(filename)
   char *filename;
{
   log_name = filename;
   is_open = 0;
}

/*
* new_log() appends a log entry containing the give time "t" and the
* string "string" to the logfile (see set_logfile() above).  The file
* is opened once and left open.  The routine returns 1 on failure, 0
* on success.
*/

new_log(t,string)
   long t;
   char *string;
{
   static FILE *logfile;

   long time();
   struct tm *tm;

   if (!is_open) {
       if ((logfile = fopen(log_name,"a")) == NULL) return(1);
       is_open = 1;
   }

   if (t) {
       tm = localtime(&t);

       fprintf(logfile,"\n%2d-%s-%02d %02d:%02d:%02d  %s",tm->tm_mday,
               month_sname(tm->tm_mon + 1),tm->tm_year,
               tm->tm_hour, tm->tm_min, tm->tm_sec, string);
   }
   else {
       fprintf(logfile,"\n%20s%s","",string);
   }

   (void) fflush(logfile);
   return(0);
}