Programming Perl, 4th Edition

getgrgid

getgrgid GID

This function looks up a group file entry by group number. The return value in list context is:

#  0      1        2     3
($name, $passwd, $gid, $members)
    = getgrgid(0);

where $members contains a space-separated list of the login names of the members of the group. If you want to do this repeatedly, consider caching the data in a hash using getgrent.

In scalar context, getgrgid returns only the group name. The User::grent module supports a by-name interface to this function. See getgrgid(3).