Re: Message Passing b/w processes , that works both in windows and Linux

For starters, fork creates a thread (not a process) in Windows. Is that a problem?

I wrote a script to communicate b/w processes bidirectionally using pipes ,but it doesn't work as intended

The script you posted runs on neither linux nor Windows until you fix the issue with reading until a newline is encountered when none is sent. Then, it works fine on both linux and Windows.

Since I need to run the same script in windows,I think I can't use socketpair like below for bidirectional communication rt?

I'm pretty sure you can, but you might have to change from AF_UNIX to AF_INET.

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Re^2: Message Passing b/w processes , that works both in windows and Linux by shijumic (Novice) on Jun 08, 2009 at 22:45 UTC
Thanks much for your rely. Would you please explain me,how to fix the issue with reading until a newline is encountered when none is sent in the above script. Thanks -Shijumic	[reply]
Re^3: Message Passing b/w processes , that works both in windows and Linux (read) by tye (Sage) on Jun 09, 2009 at 00:25 UTC
You use read($sock) not `<$sock>` (or sysread or recv). Note that you might also run into the problem I was able to work around at Re^2: ActiveState woes : Is it EOF-blind? (perl bug). And you probably want to replace fork with either Win32::Process::Create( $^X, qq(perl "$0" ...), ... ) or `system( 1, $^X, $0, ... )` (this Win32-specific use of system is documented in perlport). So write a wrapper that uses fork if not on Win32. - tye	[reply] [d/l] [select]
Re^4: Message Passing b/w processes , that works both in windows and Linux (read) by ikegami (Patriarch) on Jun 09, 2009 at 01:24 UTC
Switching to `read` alone won't be sufficient (in the child). There would be no way of knowing whether the message has been fully received.	[reply] [d/l]
Re^5: Message Passing b/w processes , that works both in windows and Linux (newlines) by tye (Sage) on Jun 09, 2009 at 01:58 UTC
Re^3: Message Passing b/w processes , that works both in windows and Linux by ikegami (Patriarch) on Jun 09, 2009 at 00:10 UTC
Since the readers are waiting for a newline, I sent one by changing `print $handle $message;` to `print $handle "$message\n";`	[reply] [d/l] [select]