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Re^3: IO::Tee and write / format

by broomduster (Priest)
on Oct 17, 2008 at 19:36 UTC ( #717848=note: print w/replies, xml ) Need Help??


in reply to Re^2: IO::Tee and write / format
in thread IO::Tee and write / format

The whole point here is to use $tee->format_write() instead of write. Then you don't have to fool around with $^ et al. (it all happens automagically). A better way for me to have shown this might have been with more calls to $tee->format_write(), as in the following modified version of what I posted earlier.
use strict; use warnings; use IO::Tee; my %hash = map { ("key$_", "val$_") } ( 1 .. 5 ); my $key; format TEE_TOP = ==== Top of Output ==== . format TEE = @<<<<< @<<<<< $key, $hash{$key} . # with lexical file handle; can also use bareword handle open my $outfile, '>', 'junk.out' or die "error opening junk.out: ($! +)"; my $tee = IO::Tee->new( \*STDOUT, $outfile ); # see docs for IO::Tee and IO::Handle for explanation of these methods # and others available for proper format use/control $tee->format_top_name( q/main::TEE_TOP/ ); for $key ( sort keys %hash ) { $tee->format_write( q/main::TEE/ ); }

from the shell:

-> ./tst-tee-write ==== Top of Output ==== key1 val1 key2 val2 key3 val3 key4 val4 key5 val5 -> cat junk.out ==== Top of Output ==== key1 val1 key2 val2 key3 val3 key4 val4 key5 val5

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[davido]: when i do get to that point I think I'll do it in a vm snapshot just in case. :)
[oiskuu]: tye, you were right: loginuid/sessionid are part of task struct if compiled with AUDITSYSCALL. I have some doubts if you should actually depend on that feature.
[Corion]: oiskuu: Depends on what you want to do with that information
[tye]: I'm not depending on that feature. But I could in this environment. I'm using getlogin(). shrug
[Corion]: For benign logging (which user started this DB instance), it's OK
[tye]: We use auditd for security monitoring. So we can rely on auditing being enabled. I'm not sure who would want to not be able to audit. Maybe some VM inside another system with audit?
[SuicideJunkie]: spies would want a system to not be able to audit.

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