vim-patch:7.4.1516

Problem:    Cannot change file permissions.
Solution:   Add setfperm().

8049253b96

test/functional/legacy/file_perm_spec.lua

@@ -0,0 +1,38 @@
+-- Test getting and setting file permissions.
+require('os')
+
+local helpers = require('test.functional.helpers')
+local clear, call, eq = helpers.clear, helpers.call, helpers.eq
+local neq, exc_exec = helpers.neq, helpers.exc_exec
+
+describe('Test getting and setting file permissions', function()
+  local tempfile = os.tmpname()
+
+  before_each(function()
+    os.remove(tempfile)
+    clear()
+  end)
+
+  it('file permissions', function()
+    eq('', call('getfperm', tempfile))
+    eq(0, call('setfperm', tempfile, 'r------'))
+
+    call('writefile', {'one'}, tempfile)
+    eq(9, call('len', call('getfperm', tempfile)))
+
+    eq(1, call('setfperm', tempfile, 'rwx------'))
+    eq('rwx------', call('getfperm', tempfile))
+
+    eq(1, call('setfperm', tempfile, 'r--r--r--'))
+    eq('r--r--r--', call('getfperm', tempfile))
+
+    local err = exc_exec(('call setfperm("%s", "---")'):format(tempfile))
+    neq(err:find('E475:'), nil)
+
+    eq(1, call('setfperm', tempfile, 'rwx------'))
+  end)
+
+  after_each(function()
+    os.remove(tempfile)
+  end)
+end)