1 files changed, 51 insertions, 0 deletions
diff --git a/tests/chmod/c-option.sh b/tests/chmod/c-option.sh
new file mode 100755
index 0000000..12adedf
--- /dev/null
+++ b/tests/chmod/c-option.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+# Verify that chmod's --changes (-c) option works.
+
+# Copyright (C) 2000-2020 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_ chmod
+
+umask 0
+file=f
+touch $file || framework_failure_
+chmod 444 $file || framework_failure_
+
+skip_if_setgid_
+
+
+chmod u=rwx $file || fail=1
+chmod -c g=rwx $file > out || fail=1
+chmod -c g=rwx $file > empty || fail=1
+
+compare /dev/null empty || fail=1
+case "$(cat out)" in
+  "mode of 'f' changed from 0744 "?rwxr--r--?" to 0774 "?rwxrwxr--?) ;;
+  *) cat out; fail=1 ;;
+esac
+
+# From V5.1.0 to 8.22 this would stat the wrong file and
+# give an erroneous ENOENT diagnostic
+mkdir -p a/b || framework_failure_
+# chmod g+s might fail as detailed in setgid.sh
+# but we don't care about those edge cases here
+chmod g+s a/b
+# This should never warn, but it did when special
+# bits are set on b (the common case under test)
+chmod -c -R g+w a 2>err
+compare /dev/null err || fail=1
+
+Exit $fail