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OpenSolaris 2009.06 - man page for vsyslog (opensolaris section 3c)

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

vsyslog - log message with a stdarg argument list
#include <syslog.h> #include <stdarg.h> void vsyslog(int priority, const char *message, va_list ap);
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.
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()); }
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+
syslog(3C), attributes(5) SunOS 5.11 30 Aug 2006 vsyslog(3C)