1 files changed, 139 insertions, 0 deletions
diff --git a/tests/cp/preserve-gid.sh b/tests/cp/preserve-gid.sh
new file mode 100755
index 0000000..fa949dd
--- /dev/null
+++ b/tests/cp/preserve-gid.sh
@@ -0,0 +1,139 @@
+#!/bin/sh
+# Verify that cp -p preserves GID when it is possible.
+
+# Copyright (C) 2007-2018 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ cp
+
+require_perl_
+require_root_
+
+# Some of the tests expect a umask that grants group and/or world read access.
+working_umask_or_skip_
+
+# Record primary group number, usually 0.
+# This is the group ID used when cp (without -p) creates a new file.
+primary_group_num=$(id -g)
+
+create() {
+  echo "$1" > "$1" || exit 1
+  chown "+$2:+$3" "$1" || exit 1
+}
+
+t0() {
+  f=$1; shift
+  u=$1; shift
+  g=$1; shift
+  rm -f b || exit 1
+  "$@" "$f" b || exit 1
+  s=$(stat -c '%u %g' b)
+  if test "x$s" != "x$u $g"; then
+    # Allow the actual group to match that of the parent directory
+    # (it was set to 0 above).
+    if test "x$s" = "x$u $primary_group_num"; then
+      :
+    else
+      echo "$0: $* $f b: $u $g != $s" 1>&2
+      Exit 1
+    fi
+  fi
+}
+
+nameless_uid=$($PERL -le '
+  foreach my $i (1000..16*1024-1)
+    {
+      getpwuid $i or (print $i), exit
+    }
+')
+nameless_gid1=$($PERL -le '
+  foreach my $i (1000..16*1024)
+    {
+      getgrgid $i or (print $i), exit
+    }
+')
+nameless_gid2=$($PERL -le '
+  foreach my $i ('"$nameless_gid1"'+1..16*1024)
+    {
+      getgrgid $i or (print $i), exit
+    }
+')
+
+if test -z "$nameless_uid" \
+    || test -z "$nameless_gid1" \
+    || test -z "$nameless_gid2"; then
+  skip_ "couldn't find a nameless UID or GID"
+fi
+
+chown "+$nameless_uid:+0" .
+
+create a0 0 0
+create b0 "$nameless_uid" "$nameless_gid1"
+create b1 "$nameless_uid" "$nameless_gid2"
+create c0 0 "$nameless_gid1"
+create c1 0 "$nameless_gid2"
+
+t0 a0 0 0 cp
+t0 b0 0 0 cp
+t0 b1 0 0 cp
+t0 c0 0 0 cp
+t0 c1 0 0 cp
+
+t0 a0 0 0 cp -p
+t0 b0 "$nameless_uid" "$nameless_gid1" cp -p
+t0 b1 "$nameless_uid" "$nameless_gid2" cp -p
+t0 c0 0 "$nameless_gid1" cp -p
+t0 c1 0 "$nameless_gid2" cp -p
+
+# For the remaining tests, we need a cp binary that is accessible to a user
+# with UID of $nameless_uid.  The build directory may not be accessible,
+# so create a temporary directory and copy cp into it, ensure that
+# $nameless_uid can access it and then make that directory the search path.
+tmp_path=
+cleanup_() { rm -rf "$tmp_path"; }
+
+# Cause mktemp to create a directory directly under /tmp.
+# Setting TMPDIR explicitly is required here, in case $TMPDIR
+# is not readable by our nameless IDs.
+test -d /tmp && TMPDIR=/tmp
+tmp_path=$(mktemp -d) || fail_ "failed to create temporary directory"
+cp "$abs_path_dir_/cp" "$tmp_path"
+chmod -R a+rx "$tmp_path"
+
+t1() {
+  f=$1; shift
+  u=$1; shift
+  g=$1; shift
+  t0 "$f" "$u" "$g" \
+      chroot --skip-chdir \
+             --user=+$nameless_uid:+$nameless_gid1 \
+             --groups="+$nameless_gid1,+$nameless_gid2" \
+        / env PATH="$tmp_path" "$@"
+}
+
+t1 a0 "$nameless_uid" "$nameless_gid1" cp
+t1 b0 "$nameless_uid" "$nameless_gid1" cp
+t1 b1 "$nameless_uid" "$nameless_gid1" cp
+t1 c0 "$nameless_uid" "$nameless_gid1" cp
+t1 c1 "$nameless_uid" "$nameless_gid1" cp
+
+t1 a0 "$nameless_uid" "$nameless_gid1" cp -p
+t1 b0 "$nameless_uid" "$nameless_gid1" cp -p
+t1 b1 "$nameless_uid" "$nameless_gid2" cp -p
+t1 c0 "$nameless_uid" "$nameless_gid1" cp -p
+t1 c1 "$nameless_uid" "$nameless_gid2" cp -p
+
+Exit $fail