Perl Programming/Keywords/-X

The -X keyword

-X is a file test that returns true, if the file is executable by real uid/gid.

It takes one argument, either a FILENAME, a FILEHANDLE, or a DIRHANDLE to test the associated file to see, if the file has zero size. If the argument is omitted, it tests $_. -X returns 1 for true and an empty string for false. If the file doesn't exist or can't be examined, it returns undef and sets $! (errno).

Syntax

  -X FILENAME
  -X FILEHANDLE
  -X EXPRESSION
  -X DIRHANDLE
  -X