Initial revision

diff --git a/tests/chmod/usage b/tests/chmod/usage
new file mode 100755 (executable)
index 0000000..cc807c8
--- /dev/null
+++ b/tests/chmod/usage
@@ -0,0 +1,90 @@
+#!/bin/sh
+# Verify that chmod works correctly with odd option combinations.
+
+if test "$VERBOSE" = yes; then
+  set -x
+  chmod --version
+fi
+
+. $srcdir/../lang-default
+
+pwd=`pwd`
+tmp=equals.$$
+trap 'status=$?; cd $pwd; rm -rf $tmp && exit $status' 0
+trap '(exit $?); exit' 1 2 13 15
+
+framework_failure=0
+mkdir $tmp || framework_failure=1
+cd $tmp || framework_failure=1
+
+if test $framework_failure = 1; then
+  echo "$0: failure in testing framework" 1>&2
+  (exit 1); exit 1
+fi
+
+fail=0
+
+# Each line in this list is a set of arguments, followed by :,
+# followed by the set of files it will attempt to chmod,
+# or empty if the usage is erroneous.
+# Many of these test cases are due to Glenn Fowler.
+# These test cases assume GNU behavior for "options" like -w.
+cases='
+  --         :
+  -- --      :
+  -- -- -- f : -- f
+  -- -- -w f : -w f
+  -- -- f    : f
+  -- -w      :
+  -- -w -- f : -- f
+  -- -w -w f : -w f
+  -- -w f    : f
+  -- f       :
+  -w         :
+  -w --      :
+  -w -- -- f : -- f
+  -w -- -w f : -w f
+  -w -- f    : f
+  -w -w      :
+  -w -w -- f : f
+  -w -w -w f : f
+  -w -w f    : f
+  -w f       : f
+  f          :
+  f --       :
+  f -w       : f
+  f f        :
+'
+
+all_files=`echo "$cases" | sed 's/.*://'`
+
+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=1
+    chmod $args 2>/dev/null && fail=1
+    ;;
+  ?*)
+    touch -- $files || framework_failure=1
+    chmod $args || fail=1
+    for file in $files; do
+      rm -f -- $files && touch -- $files && rm -- $file || framework_failure=1
+      chmod $args 2>/dev/null && fail=1
+    done
+    ;;
+  esac
+done
+
+if test $framework_failure = 1; then
+  echo "$0: failure in testing framework" 1>&2
+  fail=1
+fi
+
+(exit $fail); exit $fail