1 files changed, 86 insertions, 0 deletions
diff --git a/tests/chmod/usage.sh b/tests/chmod/usage.sh
new file mode 100755
index 0000000..daa22d6
--- /dev/null
+++ b/tests/chmod/usage.sh
@@ -0,0 +1,86 @@
+#!/bin/sh
+# Verify that chmod works correctly with odd option combinations.
+
+# Copyright (C) 2004-2020 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/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ chmod
+
+
+# Each line in this list is a set of arguments, followed by :,
+# followed by the set of files it will attempt to chmod,
+# or empty if the usage is erroneous.
+# Many of these test cases are due to Glenn Fowler.
+# These test cases assume GNU behavior for "options" like -w.
+cases='
+  --         :
+  -- --      :
+  -- -- -- f : -- f
+  -- -- -w f : -w f
+  -- -- f    : f
+  -- -w      :
+  -- -w -- f : -- f
+  -- -w -w f : -w f
+  -- -w f    : f
+  -- f       :
+  -w         :
+  -w --      :
+  -w -- -- f : -- f
+  -w -- -w f : -w f
+  -w -- f    : f
+  -w -w      :
+  -w -w -- f : f
+  -w -w -w f : f
+  -w -w f    : f
+  -w f       : f
+  f          :
+  f --       :
+  f -w       : f
+  f f        :
+  u+gr f     :
+  ug,+x f    :
+'
+
+all_files=$(echo "$cases" | sed 's/.*://'|sort -u)
+
+old_IFS=$IFS
+IFS='
+'
+for case in $cases; do
+  IFS=$old_IFS
+  args=$(expr "$case" : ' *\(.*[^ ]\) *:')
+  files=$(expr "$case" : '.*: *\(.*\)')
+
+  case $files in
+  '')
+    touch -- $all_files || framework_failure_
+    returns_ 1 chmod $args 2>/dev/null || fail=1
+    ;;
+  ?*)
+    touch -- $files || framework_failure_
+    chmod $args || fail=1
+    for file in $files; do
+      # Test for misparsing args by creating all $files but $file.
+      # chmod has a bug if it succeeds even though $file is absent.
+      rm -f -- $all_files && touch -- $files && rm -- $file \
+          || framework_failure_
+      returns_ 1 chmod $args 2>/dev/null || fail=1
+    done
+    ;;
+  esac
+done
+
+Exit $fail