Re^2: Output of a command

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Re^3: Output of a command by ysth (Canon) on Jul 30, 2008 at 05:52 UTC
It's common, but by no means universal, for --version and sometimes --help to go to stderr. There isn't any standard, so "should" is not a meaningful question. -- Online Fortune Cookie Search Office Space merchandise	[reply]
Re^4: Output of a command by gaal (Parson) on Jul 30, 2008 at 06:05 UTC
It's a pet peeve of mine for help text explicitly requested to go to stderr. If I asked for it, and it's long, please put it on stdout so I don't have to work harder to pipe it into $PAGER. Of course, if something's wrong and you need to give me an error message with some helpful text, it's fine to put it on stderr to lessen the chance of breaking my pipes.	[reply]
Re^5: Output of a command by Anomynous Monk (Scribe) on Jul 30, 2008 at 06:35 UTC
Yeah. Help going to stderr also breaks the --help\|less idiom.	[reply]
Re^6: Output of a command by parv (Parson) on Jul 30, 2008 at 06:40 UTC
Re^6: Output of a command by Fletch (Bishop) on Jul 30, 2008 at 15:06 UTC
Re^7: Output of a command by gaal (Parson) on Jul 30, 2008 at 18:18 UTC
Re^3: Output of a command by Alien (Monk) on Jul 30, 2008 at 06:20 UTC
You could be using IPC::Open3 , it will get output from STDOUT,STDERR .	[reply]
Re^3: Output of a command by Perlbotics (Archbishop) on Jul 30, 2008 at 10:06 UTC
Some examples (*nix) if you only need one stream of the commands output: $command = "curl -D- http://www.perlmonks.org"; # mixes stderr and st +dout # stdout only, no stderr noise $stdout_only = `$command 2>/dev/null`; # stderr only, no stdout noise $stderr_only = `$command 2>&1 1>/dev/null`; # both mixed up (usually not a good idea!) # Aliens suggestion to use open3 is better in this case. $brundlefly = `$command 2>&1`; [download]	[reply] [d/l]