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nixos/users: Increase maximum system uid/gid from 499 to 999

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This enlarges the system uid/gid range 6-fold, from 100 to 600 ids. This
is a preventative measure against running out of dynamically allocated
ids for NixOS services with isSystemUser, which should become the
preferred way of allocating uids for non-real users.
This commit is contained in:
Silvan Mosberger
2019-07-31 23:19:49 +02:00
parent 6c8aed6391
commit 23d920c8f0
3 changed files with 26 additions and 6 deletions
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4
nixos/modules/config/update-users-groups.pl
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@@ -56,12 +56,12 @@ sub allocGid {
$gidsUsed{$prevGid} = 1;
return $prevGid;
}
return allocId(\%gidsUsed, \%gidsPrevUsed, 400, 499, 0, sub { my ($gid) = @_; getgrgid($gid) });
return allocId(\%gidsUsed, \%gidsPrevUsed, 400, 999, 0, sub { my ($gid) = @_; getgrgid($gid) });
}
sub allocUid {
my ($name, $isSystemUser) = @_;
my ($min, $max, $up) = $isSystemUser ? (400, 499, 0) : (1000, 29999, 1);
my ($min, $max, $up) = $isSystemUser ? (400, 999, 0) : (1000, 29999, 1);
my $prevUid = $uidMap->{$name};
if (defined $prevUid && $prevUid >= $min && $prevUid <= $max && !defined $uidsUsed{$prevUid}) {
print STDERR "reviving user '$name' with UID $prevUid\n";