sub files_differ {
  system "cmp file1 file2";
 return $? >> 8;
}

[download]

Windows has no "cmp" command. $? is set to 0x0100, files_differ always returns 1, even with missing files, even with identical files. Instant fail.

H:\>perl -e "system 'cmp file1 file2';print $?,' ',$? >> 8"
'cmp' is not recognized as an internal or external command,
operable program or batch file.
256 1
H:\>

[download]

And by the way: Omitting quotes around the file name begs for trouble as soon as you replace the constants with variables. Using the multiple argument form of system would prevent that problem.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^2: Compare Binary Files by afoken
in thread Compare Binary Files by drodinthe559

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