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Group vector changeable with $)

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Group vector changeable with $)

The $) special variable has always (well, in Perl 5, at least) reflected not only the current effective group, but also the group list as returned by the getgroups() C function (if there is one). However, until this release, there has not been a way to call the setgroups() C function from Perl.

In Perl 5.004, assigning to $) is exactly symmetrical with examining it: The first number in its string value is used as the effective gid; if there are any numbers after the first one, they are passed to the setgroups() C function (if there is one).

Source: what's new for perl5.004
Copyright: Larry Wall, et al.
Next: Fixed parsing of $$<digit>, &$<digit>, etc.

Previous: Subroutine arguments created only when they're modified

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