Mailinglist Archive: opensuse-programming (9 mails)

[Marcus Meissner <meissner@xxxxxxx>]

> I sure hope I'm using it right - don't want to make myself look stupid
> in public:

 
>         va_start( v, format );
>
>         // if we're not running as a daemon, we also log stdout.
>         if ( 0==get_daemonize() )
>         {
>             vfprintf( stdout, format, v );            // FIRST USE
>             fputc( '\n', stdout );
>         }
>         vsyslog( pri, format, v );                    // SECOND USE
>
>         va_end(v);

No, you are using the va_list _twice_.
You can do that on i386 perhaps, but not on x86_64, it will just crash.

Use va_copy (v2, v); to get a second list, and pass this to vfprintf().

Perhaps try:
        va_list v2;

        va_start ( v, format );

        if 0==get_daemonize()) 
        {
                va_copy (v2, v);
                vfprintf ( stdout, format , v2);
                fputc ('\n', stdout);
                va_end (v2);
        }
        vsyslog( pri, format, v );                      // SECOND USE
        va_end(v);
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