Re: Pipe autoflush

I think your problem is that you're reading from SAPR in list context (because of the print), so it's trying to read too much, and thus blocks... Try

        print scalar <SAPR>;
[download]

        my $sap_line = <SAPR>;  # scalar context
        print $sap_line;
[download]

In that case you don't have to close SAPW.

Comment on Re: Pipe autoflush Select or Download Code

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Re^2: Pipe autoflush by Zielony (Acolyte) on Aug 23, 2007 at 12:37 UTC
Works. Thank you very much! UPDATE ...but only for cat. For other programs, for example md5sum, not.	[reply]
Re^3: Pipe autoflush by almut (Canon) on Aug 23, 2007 at 15:57 UTC
Smooth communication depends on both sides agreeing on a common protocol. Not all programs operate in a line based fashion like `cat`. For example, if you're having `md5sum` read its data from stdin (instead of supplying a list of filenames), it is reading the entire input (which may include newlines), then prints the digest of that data to stdout, and quits. IOW, simply replacing `cat` with `md5sum` in the code above can't work. If you let us in on what you're ultimately trying to achieve, we might be able to provide better assistance... :)	[reply] [d/l] [select]
Re^4: Pipe autoflush by Zielony (Acolyte) on Aug 23, 2007 at 16:33 UTC
I want to make API for SAP, Polish-English/English-Polish translator. It works in such way: `zielony:~$ sap -a # green # typed by me Slownik angielsko-polski green - rzeczownik zielen, trawnik przymiotnik zielony greens - liczba mnoga warzywa grow green - zazielenic sie -p # zielony # also by me Slownik polsko-angielski zielony - przymiotnik green` [download]	[reply] [d/l]
Re^5: Pipe autoflush by almut (Canon) on Aug 23, 2007 at 20:04 UTC
Re^6: Pipe autoflush by Zielony (Acolyte) on Aug 23, 2007 at 21:00 UTC