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/*
* log.c
* Logging facilities.
*
* Matej Pfajfar <mp292@cam.ac.uk>
*/
/*
* Changes :
* $Log$
* Revision 1.3 2002/09/04 00:39:33 arma
* the logs now include a timestamp and severity
*
* the implementation is sort of a kludge..you're welcome to fix it up
*
* Revision 1.2 2002/07/12 18:14:16 montrose
* removed loglevel from global namespace. severity level is set using log() with a NULL format argument now. example: log(LOG_ERR,NULL);
*
* Revision 1.1.1.1 2002/06/26 22:45:50 arma
* initial commit: current code
*
* Revision 1.11 2002/06/14 20:44:57 mp292
* *** empty log message ***
*
* Revision 1.10 2002/03/12 23:31:36 mp292
* *** empty log message ***
*
* Revision 1.9 2002/03/02 18:55:50 mp292
* LOG_DEBUG messages don't print the last errno error anymore.
*
* Revision 1.8 2002/01/26 22:46:48 mp292
* Reviewd according to Secure-Programs-HOWTO.
*
* Revision 1.7 2002/01/17 15:00:43 mp292
* Fixed a bug which caused malloc() generate a seg fault.
*
* Revision 1.6 2001/12/12 16:02:55 badbytes
* Minor changes in output format.
*
* Revision 1.5 2001/12/12 06:48:07 badbytes
* Correction - last error message now only shown if severity==LOG_DEBUG.
*
* Revision 1.4 2001/12/12 06:28:46 badbytes
* Modified log() to print error message for last error in addition to the user-specified message.
*
* Revision 1.3 2001/12/07 09:38:03 badbytes
* Tested.
*
* Revision 1.2 2001/12/06 15:43:50 badbytes
* config.c compiles. Proceeding to test it.
*
* Revision 1.1 2001/11/21 23:03:41 mp292
* log function coded and tested.
* Top-level makefile.
*
*/
#include <stdio.h>
#include <stdarg.h>
#include <syslog.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <time.h>
#include "log.h"
/* FIXME this whole thing is hacked together. feel free to make it clean. */
size_t sev_to_string(char *buf, int max, int severity) {
assert(max > 20);
switch(severity) {
case LOG_DEBUG:
strcpy(buf,"debug");
break;
case LOG_INFO:
strcpy(buf,"info");
break;
case LOG_NOTICE:
strcpy(buf,"notice");
break;
case LOG_WARNING:
strcpy(buf,"warn");
break;
case LOG_ERR:
strcpy(buf,"err");
break;
case LOG_CRIT:
strcpy(buf,"crit");
break;
case LOG_ALERT:
strcpy(buf,"alert");
break;
case LOG_EMERG:
strcpy(buf,"emerg");
break;
default:
strcpy(buf,"UNKNOWN");
break;
}
return strlen(buf)+1;
}
/* Outputs a message to stdout */
void log(int severity, const char *format, ...)
{
static int loglevel = LOG_DEBUG;
char buf[201];
time_t t;
va_list ap;
if ( format )
{
va_start(ap,format);
if (severity <= loglevel)
{
t = time(NULL);
strftime(buf, 200, "%b %d %H:%M:%S", localtime(&t));
printf("%s ", buf);
sev_to_string(buf, 200, severity);
printf("[%s] ", buf);
vprintf(format,ap);
printf("\n");
}
va_end(ap);
}
else
loglevel = severity;
}
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