Whenever I use a specific regular expression for exclusion, I still get a value returned. Here is a snippet... 
while(($name,$pass,$uid,$gid,$quota,$comment,$gcos,$dir,$shell) = getp
+went()) {
  if(!($shell =~ m/false/ || m/null/ || m//)) {
  print blah...
  }
}

[download]
The users with "false" and "" shells are excluded, but "null" shells still get printed; However, the exclusion works if I populate the variables by using split... 
...
while(<PW>) {
  ($name,$pass,$uid,$gid,$quota,$comment,$gcos,$dir,$shell) = split(/:
+/);
   print blah...
}

[download]
Can anyone offer me a bit of insight as to what's happening here?

In reply to regex and getpwent()... by penguinfuz

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