Pytanie o znaczenie "0xffff & system"

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Article #52267

#52267

From: Scottie
Date: Sun, 17 Jul 2011 09:14

22 lines
1829 bytes

Hej!
W jednym skrypcie znalazlem takie oto wywolanie:
----------------8<----------------
if ($file_only ne "true")
      {
        $rc = 0xffff & system("${ORACLE_HOME}/bin/sqlplus -silent
$rep_user/$rep_pwd@\"$rep_alias\" \@$outfile");
        $rc >>= 8;
        return $rc;
      }
----------------8<----------------

Czy ktos moglby mnie oswiecic, co oznacza zwlaszcza to wyrazenie:
"0xffff & system"? Co tu robi i do czego sluzy ten kod szesnastkowy?
Nastepna linia tez jest ciekawa: "$rc >>= 8;", ale tez nie rozumiem
jej znaczenia... :-/

Z gory wielkie dzieki!

Pzdr,
--
Scottie

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From: Scottie <scottie383@gmail.com>
Newsgroups: pl.comp.lang.perl
Subject: Pytanie o znaczenie "0xffff & system"
Date: Sun, 17 Jul 2011 02:14:43 -0700 (PDT)
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