Hello Monks Sorry for my babyperl , I had happy perl learning, but I find a little Wtf! issue. I try to get db2versions, db2instances and list of data bases without modules. I have The "root powEr!" but When I trying "su - $user -c 'command to get DB list' " I get some like this. 

Product instance full path
 /opt/wheredb2/Version

Current instance 
Userid

[download]
but the command doesn't execute

This is my code ...

use warnings;
use diagnostics;
use strict;
use 5.010;
use Cwd;
use DB2::Admin::Constants;
##############################                                        
+                                                                     
+                                                                     
+                                                                     
+                                          
###Get Version and instances##                                        
+                                                                     
+                                                                     
+                                                                     
+                                          
##############################                                        
+                                                                     
+                                                                     
+                                                                     
+                                          
sub check_for_instance{
  open(EXEC, '-|', 'db2ls | awk    \'!/Install/ &&    !/----/    \'') 
+or    die "Can't exec: $!\n";
  # Now read the output just like a file                              
+                                                                     
+                                                                     
+                                                                     
+                                          
  while(my $line = <EXEC>) {
    chomp $line;
    if($line=~/(\/db2\/V\d.\d+)/){
      print "Product instance full path\n $`"."$1\n";
      foreach ($line)
        {
          my $Path="$`"."$1"."/instance/";
      chdir($Path) or die "Cant chdir to $Path $!";
          my $dir = getcwd;
          open my $cmd,    '-|', './db2ilist';
          while ($line = <$cmd>) {
        say    "Current instance \n$line";
        my $user="$line"; my $action="db2 list db directory";
#########################
###  This doesn't works #
#########################
        system ("su    -l - $user -c \'$action    > DBlist.txt && cat 
+ DBlist.txt\'");

###########################
#                         #
#   this works ! XD       #
###########################
#system ("su -l - MyRealuser -c \'$action > DBlist.txt && cat  DBlist.
+txt\'");
#######
          }
          close $cmd;
    }
    }
  }
  close(EXEC);
}
&check_for_instance;

[download]

btw ,I tried to use sudo - $user -c 'command', sudo su - $user "command", sudo - $user -c "command". but when i use directly the userid su - "Myrealuser" 'comman' works as i waiting.

I hope someone can give me some light

In reply to run shell command as another user by ox1d0

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