From: nobuyoshi nakada <nobuyoshi.nakada@...>
Date: 2005-10-14T11:34:58+09:00
Subject: Re: Buffering problems

Hi,

At Fri, 14 Oct 2005 06:40:05 +0900,
Joe Van Dyk wrote in [ruby-talk:160499]:
> $stdout.sync = true
> $stderr.sync = true
> $stdout.reopen File.open(some_log_file, "w")
> $stderr.reopen File.open(some_log_file, "w")
> 
> exec 'program'

IO#sync flag is only for current process.

> Standard out and error are being redirected to the log file, but they
> are being buffered.
> 
> Any ideas on why that might be?

One way is to let the 'program' not to buffer its output.
Another way is to use pty.

-- 
Nobu Nakada