It looks like Perl, but it's heavily accented. Consider:

while (<BPCONF>)
{
     my ($server) = unpack ("@10 A10", $_);

     if (($server eq "SERVER = cluster") && ($ps ne "daemon"))
     {
          print "Server entry is correct\n";
          exit (110);
     }
     else
     {
          print "Server entry is incorrect\n";
          exit (100);
     }
}
[download]

Notes on the changes:

• ${ps} is the same as $ps. The braces are used when you are trying to specify where the variable stops and other data starts. "$psfoo" references $psfoo, not $ps like "${ps}foo" would.
• That is some truly bizarre indentation.
• A single equals makes an assignment, not a comparison. A standard comparision is eq which tests for string equivalence. == tests for numerical equivalence.
• The while{} block does not require to be terminated with a semicolon. You can put one there if you like, but it is functionally useless.
• You are comparing against $_ and not your extracted $server variable.
• $ps must be defined somewhere else in your code.
• Instead of using unpack you might want to use a regular expression, or perhaps substr.

Other than that, make sure you use strict and -w.

Here's a few ways to get your $server value, all pretty much equivalent:

my $server = substr($_, 10, 10);
my ($server) = /^.{10}(.{10})/;
[download]

Using a regular expression is generally better, especially if you're not sure precisely where the data is going to be, index wise. If you were looking for "SERVER", your code might resemble this:

while (<BPCONF>)
{
     if (/SERVER = cluster/ && $ps eq "daemon")
     {
           print "Server entry is correct\n";
           exit (110);
     }
     else
     {
           print "Server entry is incorrect\n";
           exit (100);
     }
}
[download]

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