From: "LI NGOK LAM" <[EMAIL PROTECTED]>
> I've tried to use exec, system, and ``. And also with and without $| =
> 1; but seems unable to do what I want.
If everything else fails, try to read the manual :-)
perldoc -f exec
exec LIST
exec PROGRAM LIST
The "exec" function executes a system command *and never
returns*-- use "system" instead of "exec" if you want it to
return. It fails and returns false only if the command does not
exist *and* it is executed directly instead of via your system's
command shell (see below).
...
So exec() is definitely not what you are after.
You want
system( 1, "notepad");
perldoc perlport
system(1, @args)
spawns an external process and immediately returns its process
designator, without waiting for it to terminate. Return value may
be used subsequently in C<wait> or C<waitpid>. Failure to spawn()
a subprocess is indicated by setting $? to "255 << 8". C<$?> is set
in a way compatible with Unix (i.e. the exitstatus of the subprocess
is obtained by "$? >> 8", as described in the documentation).
Actually this is something that should be documented better. It may
seem that the system( 1, ...) only works on Win32 which is not true.
Anyway ... another option would be to use Win32::Process module.
HTH, Jenda
===== [EMAIL PROTECTED] === http://Jenda.Krynicky.cz =====
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