411 REFERENCE · Wikibooks
Perl Programming/Keywords/-g
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Perl -f -k Keywords
The -g keyword
-g is a file test that tests, if the file has its setgid bit set.
It takes one argument, either a FILENAME, a FILEHANDLE, or a DIRHANDLE to test the associated file to see, if something is true about it. If the argument is omitted, it tests $_. -g 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
-g DIRHANDLE
-g EXPRESSION
-g FILEHANDLE
-g FILENAME
-g
Perl -f -k Keywords
</noinclude>