Re: Pipe Input delayed

in reply to Pipe Input delayed

~~The java program~~Unlike the java program, read_serial.pl is buffering its output.

Possible solutions:

If it provides such an option, you could configure it so it doesn't buffer its output.
You could change it so doesn't buffer its output. (e.g. By adding $|=1;)
You should be able to fool it by using a pseudo-tty instead of a pipe. See IPC::Run.

Update: Ah! Read it backwards! It's when using a Perl child that it didn't work.

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Re^2: Pipe Input delayed by yodha (Initiate) on Jun 28, 2011 at 20:57 UTC
Thanks ikegami. I disabled buffering on my perl script with `select((select(STDOUT), $\| = 1)[0]);` [download]	[reply] [d/l]
Re^3: Pipe Input delayed by jwkrahn (Abbot) on Jun 28, 2011 at 21:02 UTC
That doesn't disable buffering, it just enables auto-flush on the selected filehandle.	[reply]
Re^4: Pipe Input delayed by ikegami (Patriarch) on Jun 28, 2011 at 21:17 UTC
Same thing.	[reply]
Re^4: Pipe Input delayed by yodha (Initiate) on Jun 28, 2011 at 23:14 UTC
Ah! Thanks for making it clear	[reply]
Re^3: Pipe Input delayed by ikegami (Patriarch) on Jun 28, 2011 at 21:09 UTC
Telling Perl not to buffer STDOUT is not useful since the problem is that the java program is buffering its output. Update: Ah! Read it backwards! It's when using a Perl child that it didn't work.	[reply]

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