Re^2: different terminal

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Re^3: different terminal by davido (Cardinal) on Jun 10, 2014 at 17:23 UTC
`\|` opens a pipe (see perldoc perlopentut). `( ... )` delimits a subshell, and can be tested at the command line: `davido@somehost:~$ ( > date > who > ) Tue Jun 10 11:20:34 MDT 2014 davido :0 2014-06-09 19:35 (:0) davido pts/0 2014-06-09 19:38 (:0)` [download] See This stackexchange explanation. Dave	[reply] [d/l] [select]
Re^3: different terminal by NetWallah (Canon) on Jun 10, 2014 at 17:24 UTC
It works better without the ")". With it, the shell complains: `sh: 6: Syntax error: ")" unexpected` [download] but the output is produced anyway. What is the sound of Perl? Is it not the sound of a wall that people have stopped banging their heads against? -Larry Wall, 1992	[reply] [d/l]
had me going there for a moment. by blue_cowdawg (Monsignor) on Jun 10, 2014 at 17:47 UTC
Actual demo code: `sh-4.1# cat demo.pl #!/usr/bin/perl -w use strict; my $cmd=qq@ ( date netstat -i who cat /etc/debian_version ) @; open PIPE,"$cmd \|" or die "$cmd:$!"; my @lines=<PIPE>; printf "%s\n",join("\n",@lines);` [download] produces `sh-4.1# perl demo.pl Tue Jun 10 13:46:05 EDT 2014 Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX +-OVR Flg eth0 1500 0 19404144 0 0 0 23405161 0 +0 0 BMRU lo 65536 0 2016133 0 0 0 2016133 0 +0 0 LRU root pts/0 2014-06-10 13:11 (144.160.226.53) 6.0.9` [download] NOTE: there should be a chomp in there somewhere, but I forgot... Peter L. Berghold -- Unix Professional Peter -at- Berghold -dot- Net; AOL IM redcowdawg Yahoo IM: blue_cowdawg	[reply] [d/l] [select]
Re: had me going there for a moment. by shmem (Chancellor) on Jun 11, 2014 at 07:11 UTC
NOTE: there should be a chomp in there somewhere, but I forgot... No, things should be kept simple. `- printf "%s\n",join("\n",@lines); + print @lines;` [download] All those lines in @lines come with "\n". perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'	[reply] [d/l]
Re^4: different terminal by blue_cowdawg (Monsignor) on Jun 10, 2014 at 17:42 UTC
Funny, doesn't do that on my Linux (Debian 7) box... `sh-4.1# ( > ls > pwd > date > ) deb7-postinstall-pmaster.sh deb7-postinstall.sh list.txt /var/www/scripts Tue Jun 10 13:40:37 EDT 2014 sh-4.1#` [download] Peter L. Berghold -- Unix Professional Peter -at- Berghold -dot- Net; AOL IM redcowdawg Yahoo IM: blue_cowdawg	[reply] [d/l]
Re^5: different terminal by LanX (Saint) on Jun 10, 2014 at 17:49 UTC
> Funny, doesn't do that on my Linux ... Because this time you didn't forget the opening bracket of your subshell ;) Cheers Rolf (addicted to the Perl Programming Language)	[reply]
Re^6: different terminal by blue_cowdawg (Monsignor) on Jun 10, 2014 at 17:52 UTC