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Convert Korn shell echo status to Perl

Posted on 2008-11-02
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Last Modified: 2010-05-18
I have the following two UNIX Korn shell commands. The semi-colon is needed instead of the pipe symbol after the grep statement otherwise it doesn't work:

chk_auto_up | grep AUTOSYSDB; echo $?
it returns a 0

chk_auto_up | grep AUTOSYSDB2; echo $?
it returns a 1

Both of these shell statements are returning the correct echo status.

When I run this command as Perl:
system("chk_auto_up | grep AUTOSYSDB | echo $?");
or
system("chk_auto_up | grep AUTOSYSDB2 | echo $?");

they both return a 0

The "chk_auto_up" command is an AutoSys command which checks databases.

thanks
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Question by:Richard Kreidl
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Expert Comment

by:Tintin
ID: 22860745
system("chk_auto_up | grep AUTOSYSDB2 | echo $?")

should be

system("chk_auto_up | grep AUTOSYSDB2 ; echo $?")
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Accepted Solution

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Tintin earned 2000 total points
ID: 22860752
Sorry, I didn't test beforehand.

You could do
my $result = `chk_auto_up | grep AUTOSYSDB2`;
 
if ($result) {
  print "Exists\n";
}
else {
  print "Does not exist\n";
}

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Author Comment

by:Richard Kreidl
ID: 22860761
Doesn't work it returns 0.
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Author Comment

by:Richard Kreidl
ID: 22860780
Doesn't work it comes back with Exists
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LVL 48

Expert Comment

by:Tintin
ID: 22863245
Really?  Can you please show me this behaviour by adding a print before the if test.
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