setsid() does not call FreeConsole() even if all files are closed

[Igor Pechtchanski]

On Sun, 13 Nov 2005, Christian Franke wrote:

> when starting a daemon from the console, the console will not close
> before the daemon finishes.
>
> Try, e.g:
>
> $ /usr/sbin/syslogd
> $ exit
>
> Shell exits, but console window persists until syslogd is terminated.
>
> Workaround:
>
>   setsid();
> +  #ifdef __CYGWIN__
> +  FreeConsole();
> +  #endif
>
> According to syscall.cc:setsid(), FreeConsole() should be called if a
> tty exists and no files are open.

Yep, so, as CGF noted, try

$ /usr/sbin/syslogd >/dev/null 2>&1 </dev/null
$ exit

However, the main question is whether syslogd *should* close the file
descriptors if it doesn't intend to write to them.  I'm not familiar
enough with syslogd's operation -- if it normally writes to stdout/stderr
(or reads from stdin), the above is the only way to get the shell to
close.  If syslogd never reads/writes to standard filehandles in daemon
mode, it should close them itself (i.e., this is a syslogd bug).
	Igor
-- 
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