Modules to handle backticks?

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: Modules to handle backticks? by Kanji (Parson) on Nov 24, 2002 at 03:15 UTC
You might want to take at a few of the IPC:: modules like IPC::Open3 (alt.) and IPC::Run (alt.), but an alternative on platforms that support descriptor redirection is something like ... # adapted from the Perl Cookbook, 16.9 @all = `( cmd \| perl -pe "s/^/stdout: /" ) 2>&1`; for (@all) { push @{ s/stdout: // ? \@out : \@err }, $_ } [download] --k.	[reply] [d/l]
Re: Modules to handle backticks? by dbp (Pilgrim) on Nov 24, 2002 at 08:04 UTC
I'd also suggest the IPC:: modules. For example, if you want to control the input and output of another program, try something like this (Perl Cookbook, pg. 567): `use IPC::Open2; open2(README, WRITEME, $program) print WRITEME "here's your input\n"; $output = <README>; close(WRITEME); close(README);` [download] If you want to control the input, output, and error use IPC::Open3.	[reply] [d/l]
Re: Modules to handle backticks? by DamnDirtyApe (Curate) on Nov 24, 2002 at 02:59 UTC
What exactly do you mean by "handle backticks"? Perl does backticks by itself, without any modules. They work like the `qx{}` operator. See perlop for more details. _______________ DamnDirtyApe Those who know that they are profound strive for clarity. Those who would like to seem profound to the crowd strive for obscurity. --Friedrich Nietzsche	[reply] [d/l]
Re: Modules to handle backticks? by Rudif (Hermit) on Nov 24, 2002 at 23:19 UTC
>> ... and gather stdout, stderr. Quoting from perlop ... qx/STRING/ ... To capture a command's STDERR and STDOUT together: $output = `cmd 2>&1`; [download] This works for me, on WinXP, as in the example below. To generate output going to stdout in one case and to stderr in another case, my script calls a Perforce command (p4 change -o) with a good changelist (43026) - this writes to stdout, and then with an inexistent one (143026) - this writes to stderr. #!/usr/bin/perl use strict; use warnings; printf STDERR "1 stdout: %s\n\n", ` p4 change -o 43026 `; printf STDERR "2 stdout: %s\n\n", ` p4 change -o 143026 `; printf STDERR "3 stdout+stderr 2>&1: %s\n\n", ` p4 change -o 143026 +2>&1 `; __END__ # typical output on my machine # 1 stdout: # A Perforce Change Specification. Change 143026 unknown. 2 stdout: 3 stdout+stderr 2>&1: Change 143026 unknown. [download] HTH rudif	[reply] [d/l] [select]
Re: Modules to handle backticks? by Anonymous Monk on Nov 25, 2002 at 01:56 UTC
Hi monks Thanks for the replies - IPC::Run looks the most promising for what I'm trying to do, but all replies are much appreciated. Cheers, Rich	[reply]