Re: selecting from a number of different input sources.

Problem is that if you try to read from a file which has no new data in it, then the io->getline() function will get blocked

That's not true. It will return end-of-file. Or are you reading from something other than a plain file?

Comment on Re: selecting from a number of different input sources.

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Re^2: selecting from a number of different input sources. by jasoncollins (Novice) on Jul 21, 2010 at 16:55 UTC
The file that I am readnig from is constantly being written to by some other source, so its not a static file. At times getline will block when there is no new data, and at times it won't when there is new data.	[reply]
Re^3: selecting from a number of different input sources. by ikegami (Patriarch) on Jul 21, 2010 at 17:25 UTC
At times getline will block when there is no new data I'll repeat: No, it won't. `$ perl -le'$\|=1; for (;;) { print "poke"; sleep 1; }' > file & perl -M +IO::Handle -e'sleep 3; print while $_ = STDIN->getline; print "exited + instead of blocking\n"' < file ; fg [1] 29483 poke poke poke poke exited instead of blocking perl -le'$\|=1; for (;;) { print "poke"; sleep 1; }' > file ^C $ cat file ; rm file poke poke poke poke poke poke` [download]	[reply] [d/l]
Re^3: selecting from a number of different input sources. by runrig (Abbot) on Jul 21, 2010 at 17:34 UTC
Options: open a pipe to xtail, use POE::Wheel::FollowTail, roll your own working program/library with select, write and upload a File::Xtail (no, that last link doesn't work).	[reply]