Validate names passed to 'export'.

core/builtin.py

@@ -574,12 +574,11 @@ def Export(argv, mem):
  arg, i = EXPORT_SPEC.Parse(argv)
  if arg.n:
    for name in argv[i:]:
      # TODO: Validate variable name
      m = lex.VAR_NAME_RE.match(name)
      if not m:
        raise args.UsageError('export: Invalid variable name %r' % name)

      # NOTE: bash does not care if it wasn't found
      # NOTE: bash doesn't care if it wasn't found.
      _ = mem.ClearFlag(name, var_flags_e.Exported, scope_e.Dynamic)
  else:
    for arg in argv[i:]:
@@ -591,6 +590,10 @@ def Export(argv, mem):
        name, s = parts
        val = runtime.Str(s)

      m = lex.VAR_NAME_RE.match(name)
      if not m:
        raise args.UsageError('export: Invalid variable name %r' % name)

      #log('%s %s', name, val)
      mem.SetVar(
          runtime.LhsName(name), val, (var_flags_e.Exported,), scope_e.Dynamic)