#!./perl
+BEGIN {
+ if ( $^O eq 'VMS' ) {
+ my $p = "/bin:/usr/bin:/usr/xpg4/bin:/usr/ucb";
+ if ( $ENV{PATH} ) {
+ $p .= ":$ENV{PATH}";
+ }
+ $ENV{PATH} = $p;
+ }
+ $ENV{LC_ALL} = "C"; # so that external utilities speak English
+ $ENV{LANGUAGE} = 'C'; # GNU locale extension
+
+ chdir 't';
+ @INC = '../lib';
+}
+use 5.010;
+use strict;
+use Config ();
+use POSIX ();
+
+unless (eval { my($foo) = getgrgid(0); 1 }) {
+ quit( "getgrgid() not implemented" );
+}
+
+quit("No `id' or `groups'") if
+ $^O eq 'MSWin32'
+ || $^O eq 'NetWare'
+ || $^O eq 'VMS'
+ || $^O =~ /lynxos/i;
+
+Test();
+exit;
+
+
-$ENV{PATH} ="/bin:/usr/bin:/usr/xpg4/bin:/usr/ucb" .
- exists $ENV{PATH} ? ":$ENV{PATH}" : "";
-$ENV{LC_ALL} = "C"; # so that external utilities speak English
-$ENV{LANGUAGE} = 'C'; # GNU locale extension
+sub Test {
+
+ # Get our supplementary groups from the system by running commands
+ # like `id -a'.
+ my ( $groups_command, $groups_string ) = system_groups()
+ or quit( "No `id' or `groups'" );
+ my @extracted_groups = extract_system_groups( $groups_string )
+ or quit( "Can't parse `${groups_command}'" );
+
+ my $pwgid = $( + 0;
+ my ($pwgnam) = getgrgid($pwgid);
+ $pwgnam //= '';
+ print "# pwgid=$pwgid pwgnam=$pwgnam \$(=$(\n";
+
+ # Get perl's supplementary groups by looking at $(
+ my ( $gid_count, $all_perl_groups ) = perl_groups();
+ my %basegroup = basegroups( $pwgid, $pwgnam );
+ my @extracted_supplementary_groups = remove_basegroup( \ %basegroup, \ @extracted_groups );
+
+ print "1..2\n";
+
+
+ # Test: The supplementary groups in $( should match the
+ # getgroups(2) kernal API call.
+ #
+ my $ngroups_max = posix_ngroups_max();
+ if ( defined $ngroups_max && $ngroups_max < @extracted_groups ) {
+ # Some OSes (like darwin)but conceivably others might return
+ # more groups from `id -a' than can be handled by the
+ # kernel. On darwin, NGROUPS_MAX is 16 and 12 are taken up for
+ # the system already.
+ #
+ # There is more fall-out from this than just Perl's unit
+ # tests. You may be a member of a group according to Active
+ # Directory (or whatever) but the OS won't respect it because
+ # it's the 17th (or higher) group and there's no space to
+ # store your membership.
+ print "ok 1 # SKIP Your platform's `$groups_command' is broken\n";
+ }
+
+ elsif ( darwin() ) {
+ # darwin uses getgrouplist(3) or an Open Directory API within
+ # /usr/bin/id and /usr/bin/groups which while "nice" isn't
+ # accurate for this test. The hard, real, list of groups we're
+ # running in derives from getgroups(2) and is not dynamic but
+ # the Libc API getgrouplist(3) is.
+ #
+ # In practical terms, this meant that while `id -a' can be
+ # relied on in other OSes to purely use getgroups(2) and show
+ # us what's real, darwin will use getgrouplist(3) to show us
+ # what might be real if only we'd open a new console.
+ #
+ print "ok 1 # SKIP darwin's `${groups_command}' can't be trusted\n";
+ }
+ else {
+
+ # Read $( but ignore any groups in $( that we failed to parse
+ # successfully out of the `id -a` mess.
+ #
+ my @perl_groups = remove_unparsed_entries( \ @extracted_groups,
+ \ @$all_perl_groups );
+ my @supplementary_groups = remove_basegroup( \ %basegroup,
+ \ @perl_groups );
+
+ my $ok1 = 0;
+ if ( match_groups( \ @supplementary_groups,
+ \ @extracted_supplementary_groups,
+ $pwgid ) ) {
+ print "ok 1\n";
+ $ok1 = 1;
+ }
+ elsif ( cygwin_nt() ) {
+ %basegroup = unixy_cygwin_basegroups();
+ @extracted_supplementary_groups = remove_basegroup( \ %basegroup, \ @extracted_groups );
+
+ if ( match_groups( \ @supplementary_groups,
+ \ @extracted_supplementary_groups,
+ $pwgid ) ) {
+ print "ok 1 # This Cygwin behaves like Unix (Win2k?)\n";
+ $ok1 = 1;
+ }
+ }
+
+ unless ( $ok1 ) {
+
+ }
+ }
+
+ # multiple 0's indicate GROUPSTYPE is currently long but should be short
+ $gid_count->{0} //= 0;
+ if ( 0 == $pwgid || $gid_count->{0} < 2 ) {
+ print "ok 2\n";
+ }
+ else {
+ print "not ok 2 (groupstype should be type short, not long)\n";
+ }
+
+ return;
+}
+
+# Cleanly abort this entire test file
sub quit {
- print "1..0 # Skip: no `id` or `groups`\n";
+ print "1..0 # SKIP: @_\n";
exit 0;
}
-quit() if (($^O eq 'MSWin32' || $^O eq 'NetWare') or $^O =~ /lynxos/i);
+# Get the system groups and the command used to fetch them.
+#
+sub system_groups {
+ my ( $cmd, $groups_string ) = _system_groups();
+
+ if ( $groups_string ) {
+ chomp $groups_string;
+ diag_variable( groups => $groups_string );
+ }
+
+ return ( $cmd, $groups_string );
+}
# We have to find a command that prints all (effective
# and real) group names (not ids). The known commands are:
# foo bar zot # accept
# foo 22 42 bar zot # accept
# 1 22 42 2 3 # reject
-# groups=(42),foo(1),bar(2),zot me(3) # parse
-# groups=22,42,1(foo),2(bar),3(zot me) # parse
+# groups=(42),foo(1),bar(2),zot me(3) # parsed by $GROUP_RX1
+# groups=22,42,1(foo),2(bar),3(zot(me)) # parsed by $GROUP_RX2
#
# and the groups= might be after, before, or between uid=... and gid=...
+use constant GROUP_RX1 => qr/
+ ^
+ (?<gr_name>.+)
+ \(
+ (?<gid>\d+)
+ \)
+ $
+/x;
+use constant GROUP_RX2 => qr/
+ ^
+ (?<gid>\d+)
+ \(
+ (?<gr_name>.+)
+ \)
+ $
+/x;
+sub _system_groups {
+ my $cmd;
+ my $str;
-GROUPS: {
# prefer 'id' over 'groups' (is this ever wrong anywhere?)
# and 'id -a' over 'id -Gn' (the former is good about spaces in group names)
- if (($groups = `id -a 2>/dev/null`) ne '') {
- # $groups is of the form:
- # uid=39957(gsar) gid=22(users) groups=33536,39181,22(users),0(root),1067(dev)
- last GROUPS if $groups =~ /groups=/;
+
+ $cmd = 'id -a 2>/dev/null';
+ $str = `$cmd`;
+ if ( $str && $str =~ /groups=/ ) {
+ # $str is of the form:
+ # uid=39957(gsar) gid=22(users) groups=33536,39181,22(users),0(root),1067(dev)
+ # FreeBSD since 6.2 has a fake id -a:
+ # uid=1001(tobez) gid=20(staff) groups=20(staff), 0(wheel), 68(dialer)
+ return ( $cmd, $str );
}
- if (($groups = `id -Gn 2>/dev/null`) ne '') {
- # $groups could be of the form:
- # users 33536 39181 root dev
- last GROUPS if $groups !~ /^(\d|\s)+$/;
+
+ $cmd = 'id -Gn 2>/dev/null';
+ $str = `$cmd`;
+ if ( $str && $str !~ /^[\d\s]$/ ) {
+ # $str could be of the form:
+ # users 33536 39181 root dev
+ return ( $cmd, $str );
}
- if (($groups = `groups 2>/dev/null`) ne '') {
- # may not reflect all groups in some places, so do a sanity check
- if (-d '/afs') {
- print <<EOM;
+
+ $cmd = 'groups 2>/dev/null';
+ $str = `$cmd`;
+ if ( $str ) {
+ # may not reflect all groups in some places, so do a sanity check
+ if (-d '/afs') {
+ print <<EOM;
# These test results *may* be bogus, as you appear to have AFS,
# and I can't find a working 'id' in your PATH (which I have set
# to '$ENV{PATH}').
#
# If these tests fail, report the particular incantation you use
# on this platform to find *all* the groups that an arbitrary
-# luser may belong to, using the 'perlbug' program.
+# user may belong to, using the 'perlbug' program.
EOM
- }
- last GROUPS;
+ }
+ return ( $cmd, $str );
}
- # Okay, not today.
- quit();
+
+ return ();
}
-unless (eval { getgrgid(0); 1 }) {
- print "1..0 # Skip: getgrgid() not implemented\n";
- exit 0;
+# Convert the strings produced by parsing `id -a' into a list of group
+# names
+sub extract_system_groups {
+ my ( $groups_string ) = @_;
+
+ # Remember that group names can contain whitespace, '-', '(parens)',
+ # et cetera. That is: do not \w, do not \S.
+ my @extracted;
+ if ($groups_string =~ /groups=(.+)( [ug]id=|$)/) {
+ my $gr = $1;
+
+ my @g = split m{, ?}, $gr;
+ # prefer names over numbers
+ for (@g) {
+ if ( $_ =~ GROUP_RX1() || $_ =~ GROUP_RX2() ) {
+ push @extracted, $+{gr_name} || $+{gid};
+ }
+ else {
+ print "# ignoring group entry [$_]\n";
+ }
+ }
+
+ diag_variable( gr => $gr );
+ diag_variable( g => join ',', @g );
+ diag_variable( ex_gr => join ',', @extracted );
+ }
+
+ return @extracted;
+}
+
+# Get the POSIX value NGROUPS_MAX.
+sub posix_ngroups_max {
+ return eval {
+ POSIX::NGROUPS_MAX();
+ };
+}
+
+# Test if this is Apple's darwin
+sub darwin {
+ # Observed 'darwin-2level'
+ return $Config::Config{myuname} =~ /^darwin/;
+}
+
+# Test if this is Cygwin
+sub cygwin_nt {
+ return $Config::Config{myuname} =~ /^cygwin_nt/i;
}
-# Remember that group names can contain whitespace, '-', et cetera.
-# That is: do not \w, do not \S.
-if ($groups =~ /groups=(.+)( [ug]id=|$)/) {
- my $gr = $1;
- my @g0 = split /,/, $gr;
- my @g1;
- # prefer names over numbers
- for (@g0) {
- # 42(zot me)
- if (/^(\d+)(?:\(([^)]+)\))?/) {
- push @g1, ($2 || $1);
- }
- # zot me(42)
- elsif (/^([^(]*)\((\d+)\)/) {
- push @g1, ($1 || $2);
- }
- else {
- print "# ignoring group entry [$_]\n";
- }
+# Get perl's supplementary groups and the number of times each gid
+# appeared.
+sub perl_groups {
+ # Lookup perl's own groups from $(
+ my @gids = split ' ', $(;
+ my %gid_count;
+ my @gr_name;
+ for my $gid ( @gids ) {
+ ++ $gid_count{$gid};
+
+ my ($group) = getgrgid $gid;
+
+ # Why does this test prefer to not test groups which we don't have
+ # a name for? One possible answer is that my primary group comes
+ # from from my entry in the user database but isn't mentioned in
+ # the group database. Are there more reasons?
+ next if ! defined $group;
+
+
+ push @gr_name, $group;
}
- print "# groups=$gr\n";
- print "# g0 = @g0\n";
- print "# g1 = @g1\n";
- $groups = "@g1";
+
+ diag_variable( gr_name => join ',', @gr_name );
+
+ return ( \ %gid_count, \ @gr_name );
}
-print "1..2\n";
+# Remove entries from our parsing of $( that don't appear in our
+# parsing of `id -a`.
+sub remove_unparsed_entries {
+ my ( $extracted_groups, $perl_groups ) = @_;
-$pwgid = $( + 0;
-($pwgnam) = getgrgid($pwgid);
-if ($^O eq 'cygwin') { # basegroup on Cygwin has id = 0.
- @basegroup{$pwgid,$pwgnam} = (0,0);
-} else {
- @basegroup{$pwgid,$pwgnam} = (1,1);
+ my %was_extracted =
+ map { $_ => 1 }
+ @$extracted_groups;
+
+ return
+ grep { $was_extracted{$_} }
+ @$perl_groups;
}
-$seen{$pwgid}++;
-for (split(' ', $()) {
- next if $seen{$_}++;
- ($group) = getgrgid($_);
- if (defined $group) {
- push(@gr, $group);
+# Get a list of base groups. I'm not sure why cygwin by default is
+# skipped here.
+sub basegroups {
+ my ( $pwgid, $pwgnam ) = @_;
+
+ if ( cygwin_nt() ) {
+ return;
}
else {
- push(@gr, $_);
+ return (
+ $pwgid => 1,
+ $pwgnam => 1,
+ );
}
-}
+}
-if ($^O =~ /^(?:uwin|solaris)$/) {
- # Or anybody else who can have spaces in group names.
- $gr1 = join(' ', grep(!$did{$_}++, sort split(' ', join(' ', @gr))));
-} else {
- $gr1 = join(' ', sort @gr);
+# Cygwin might have another form of basegroup which we should actually use
+sub unixy_cygwin_basegroups {
+ my ( $pwgid, $pwgnam ) = @_;
+ return (
+ $pwgid => 1,
+ $pwgnam => 1,
+ );
}
-$gr2 = join(' ', grep(!$basegroup{$_}++, sort split(' ',$groups)));
+# Filter a full list of groups and return only the supplementary
+# gorups.
+sub remove_basegroup {
+ my ( $basegroups, $groups ) = @_;
-if ($gr1 eq $gr2) {
- print "ok 1\n";
+ return
+ grep { ! $basegroups->{$_} }
+ @$groups;
}
-else {
- print "#gr1 is <$gr1>\n";
- print "#gr2 is <$gr2>\n";
- print "not ok 1\n";
+
+# Test supplementary groups to see if they're a close enough match or
+# if there aren't any supplementary groups then validate the current
+# group against $(.
+sub match_groups {
+ my ( $supplementary_groups, $extracted_supplementary_groups, $pwgid ) = @_;
+
+ # Compare perl vs system groups
+ my %g;
+ $g{$_}[0] = 1 for @$supplementary_groups;
+ $g{$_}[1] = 1 for @$extracted_supplementary_groups;
+
+ # Find any mismatches
+ my @misses =
+ grep { ! ( $g{$_}[0] && $g{$_}[1] ) }
+ sort keys %g;
+
+ return
+ ! @misses
+ || ( ! @$supplementary_groups
+ && 1 == @$extracted_supplementary_groups
+ && $pwgid == $extracted_supplementary_groups->[0] );
}
-# multiple 0's indicate GROUPSTYPE is currently long but should be short
+# Print a nice little diagnostic.
+sub diag_variable {
+ my ( $label, $content ) = @_;
-if ($pwgid == 0 || $seen{0} < 2) {
- print "ok 2\n";
+ printf "# %-11s=%s\n", $label, $content;
+ return;
}
-else {
- print "not ok 2 (groupstype should be type short, not long)\n";
+
+# Removes duplicates from a list
+sub uniq {
+ my %seen;
+ return
+ grep { ! $seen{$_}++ }
+ @_;
}
+
+# Local variables:
+# indent-tabs-mode: nil
+# End:
+#
+# ex: set ts=8 sts=4 sw=4 noet:
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