From: Jun Young Kim <jykim@...>
Date: 2009-04-20T11:17:31+09:00
Subject: what's the differences between IO.popen ( or IO.pipe) and PTY.spawn??

Hi, all.

The program I want to execute as a external program in ruby is using a  
write system call.

When I use IO.popen or IO.pipe, there is no output because of the  
external program didn't flush it's output. (but, when I executed it in  
shell, normally it shows up outputs).

But, when I use PTY.spawn(), the output is generated.

what's the differences between them??