Проект OpenNet: MAN vsyslog (3) Библиотечные вызовы (FreeBSD и Linux)

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vsyslog (3)

>> vsyslog (3) ( Solaris man: Библиотечные вызовы )

vsyslog (3) ( FreeBSD man: Библиотечные вызовы )

vsyslog (3) ( Русские man: Библиотечные вызовы )

vsyslog (3) ( Linux man: Библиотечные вызовы )

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());
}