Question

Execute shell command within perl

Asked by: hallikpapa

I have a script that needs to execute a command that has been tested and works on a command line, but it gives me this error:

sh: -c: line 1: syntax error near unexpected token `|'
sh: -c: line 1: ` | sendxmpp --chatroom nbyloff@conference.chatter'


I was trying to execute it like this.
 system("echo $line | sendxmpp --chatroom testroom\@conference.chatter");

I also  escaped the pipe like \| but that still gave me the same error.

This is the final command that works manually:
echo "Test Message" | sendxmpp --chatroom testroom\@conference.chatter

Also, if it is a problem with escaping, would I need to somehow escape out all the contents of $line as well?

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Asked On
2009-08-14 at 13:42:49ID24654249
Tags

perl

,

shell

Topic

Perl Programming Language

Participating Experts
1
Points
500
Comments
5

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Answers

 

by: ozoPosted on 2009-08-14 at 13:47:29ID: 25102203

what was in $line ?

 

by: ozoPosted on 2009-08-14 at 13:51:43ID: 25102229

does $line end with "\n" ?

 

by: hallikpapaPosted on 2009-08-14 at 13:54:09ID: 25102242

The script tails apache logs. here is two examples of $line:

192.168.240.1 - - [04/May/2009:11:01:17 -0500] "GET /admin/ HTTP/1.1" 200 4251
192.168.240.1 - - [03/Jun/2009:12:27:51 -0500] "GET /server.php?sid=11&uid=userName&ts=1244050018&ssotoken=d39d40d707e18799f92e94ce50e29f40&mid=user& HTTP/1.1" 500 -



 

by: ozoPosted on 2009-08-14 at 14:19:16ID: 25102447

If $line contains "\n" that you want echoed, and $line does not contain ' then you might do
  system("echo '$line' | ...")
if $line contains "\n" that you don't want echoed, and you can modify $line, you can
  chomp $line;
if  $line may contain "\n" or ' that you want sent to sendxmpp. then you might do
  open(SHELL,"|-", "sendxmpp","--chatroom",'nbyloff@conference.chatter') or die $!;
  print SHELL $line;
  close SHELL;

 

by: hallikpapaPosted on 2009-08-14 at 14:35:05ID: 25102553

This worked perfectly.

  open(SHELL,"|-", "sendxmpp","--chatroom",'nbyloff@conference.chatter') or die $!;
  print SHELL $line;
  close SHELL;

This is for a jabber server at work. We have multiple development (or QA) servers that we don't really have access to, so I wrote a script to tail all the files and send errors to specific chat rooms to make for quicker debugging in different environments. This command was the last piece. Thank you!

20120131-EE-VQP-002

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