NAME

vsyslog - log message with a stdarg argument list

SYNOPSIS

#include <syslog.h>
#include <stdarg.h>
void vsyslog(int priority, const char *message, va_list ap);

DESCRIPTION

The vsyslog() function is identical to syslog(3C), except that it is called with an argument list as defined by <stdarg.h> rather than with a variable number of arguments.

EXAMPLES

Example 1 Use vsyslog() to write an error routine.

The following example demonstrates the use of vsyslog() in writing an error routine.

#include <syslog.h>
#include <stdarg.h>
/*


 * error should be called like:


 *   error(pri, function_name, format, arg1, arg2...);


 */
void
error(int pri, char *function_name, char *format, ...)
{


        va_list args;


        va_start(args, format);


        /* log name of function causing error */


        (void) syslog(pri, "ERROR in %s.", function_name);


        /* log remainder of message */


        (void) vsyslog(pri, format, args);


        va_end(args);


        (void) abort( );
}
main()
{


        error(LOG_ERR, "main", "process %d is dying", getpid());
}

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:

SEE ALSO

syslog(3C), attributes(7)