Re: How do I redirect STDERR to a subroutine?

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Re: Re: How do I redirect STDERR to a subroutine? by perlfan (Parson) on Feb 17, 2004 at 23:23 UTC
You can use the open in conjuction with STDOUT and STDERR redirections, or test the @_ resulting from the eval function ... Brett http://www.brettsbsd.net	[reply]
Re: Re: How do I redirect STDERR to a subroutine? by DaWolf (Curate) on Feb 18, 2004 at 15:02 UTC
You've said: "Messing with the standard streams should be your last resort." I've had a a question about STDERR not long ago, so I'm curious: could you explain why it should be the last resort? For an example, if my perl program runs in a Win32 environment without a DOS box, unless I "mess" with STDERR and put it into a file, I'd never see any errors generated by perl... So, you can say messing with STDERR was my first resort ;) Thanks, my ($author_nickname, $author_email) = ("DaWolf","erabbott\@terra.com.br") if ($author_name eq "Er Galvão Abbott");	[reply]
Re: Re: Re: How do I redirect STDERR to a subroutine? by stvn (Monsignor) on Feb 18, 2004 at 16:08 UTC
TMTOWTDI ... and ... Good advice is not always cross-platform. :)	[reply]
Re: Re: Re: How do I redirect STDERR to a subroutine? by samtregar (Abbot) on Feb 18, 2004 at 19:27 UTC
I don't know much about Win32, but it sounds like STDERR is broken there. On Linux STDERR is virtually never broken unless you break it yourself. And if you do, there'll be hell to pay. Not too long ago I helped a co-worker track down a very difficult bug; in the end it turned out that he'd effectively closed STDERR and wasn't seeing the simple error message that would have helped him find the problem. -sam	[reply]
Re: Re: Re: Re: How do I redirect STDERR to a subroutine? by DaWolf (Curate) on Feb 18, 2004 at 20:12 UTC
Sorry, but I have to disagree again. STDERR, AFAIK, is working perfectly on ActivePerl 5.8.0 on my Win2k box. The app I've mentioned writes to a log file and I get all sorts of error when things go wrong. I know Windows isn't perfect (at all) but people should have a little more faith on things running on it, instead of expecting them to go wrong just because it's a Win32 environment... Please, don't get me wrong, I don't mean to be rude, but I think any generalization is bad. I agree with you when you say that STDERR shouldn't be "muted", but then again neither I or the OP were suggesting this (if I ever do please kill me), we just want to redirect STDERR so we can treat it before displaying it, if I understood him correctly. Background: When I say "we" referring to me and the OP, it's because of my node: Formatting STDERR. Best regards, my ($author_nickname, $author_email) = ("DaWolf","erabbott\@terra.com.br") if ($author_name eq "Er Galvão Abbott");	[reply]