vsyslog(3C)						   Standard C Library Functions 					       vsyslog(3C)

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(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       syslog(3C), attributes(5)

SunOS 5.11							    30 Aug 2006 						       vsyslog(3C)