Re^2: IO::Socket recv and send

The connected() method seems to do the trick, but I have two more questions: 1. Do I have to explicitly call it every time before I call send() and recv()? It looks silly. In C, I can immediately tell if the send or recv is successful or not by inspecting the return value. I can also catch SIGPIPE if I need to. 2. What will happen if the peer crashes right after the connected() check and before the send() or recv()? The send() or recv() will still fail and there seems to be no way to avoid this.

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Re^3: IO::Socket recv and send by roboticus (Chancellor) on Mar 26, 2019 at 12:34 UTC
PublicAccess: Error checking code often adds a bunch of visual clutter to code. It's all a matter of which tradeoffs you want to make. Checking before each send()/recv() is pretty good, but (as you mention) adds clutter. Worse, it won't always work, as you could be disconnected between the check and the following call. You could also check only after you receive a null, but only works for recv(). You mention that in C you could check for SIGPIPE, so if it meets your needs in C, why not use it in your script? The perlvar documentation for %SIG shows how to create a signal handler. ...roboticus When your only tool is a hammer, all problems look like your thumb.	[reply]

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Re^3: IO::Socket recv and send
by roboticus (Chancellor) on Mar 26, 2019 at 12:34 UTC

PublicAccess:

Error checking code often adds a bunch of visual clutter to code. It's all a matter of which tradeoffs you want to make.

Checking before each send()/recv() is pretty good, but (as you mention) adds clutter. Worse, it won't always work, as you could be disconnected between the check and the following call.

You could also check only after you receive a null, but only works for recv().

You mention that in C you could check for SIGPIPE, so if it meets your needs in C, why not use it in your script? The perlvar documentation for %SIG shows how to create a signal handler.

...roboticus

When your only tool is a hammer, all problems look like your thumb.

[reply]