Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 229 insertions, 0 deletions

diff --git a/REORG.TODO/stdlib/tst-environ.c b/REORG.TODO/stdlib/tst-environ.c
new file mode 100644
index 0000000000..b2301641f5
--- /dev/null
+++ b/REORG.TODO/stdlib/tst-environ.c
@@ -0,0 +1,229 @@
+/* Copyright (C) 1999-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <libc-diag.h>
+
+#define VAR "FOOBAR"
+
+char putenv_val[100] = VAR "=some longer value";
+
+static int
+do_test (void)
+{
+  int result = 0;
+  const char *valp;
+
+  /* First test: remove entry FOOBAR, whether it exists or not.  */
+  unsetenv (VAR);
+
+  /* Now getting the value should fail.  */
+  if (getenv (VAR) != NULL)
+    {
+      printf ("There should be no `%s' value\n", VAR);
+      result = 1;
+    }
+
+  /* Now add a value, with the replace flag cleared.  */
+  if (setenv (VAR, "one", 0) != 0)
+    {
+      printf ("setenv #1 failed: %m\n");
+      result = 1;
+    }
+
+  /* Getting this value should now be possible.  */
+  valp = getenv (VAR);
+  if (valp == NULL || strcmp (valp, "one") != 0)
+    {
+      puts ("getenv #2 failed");
+      result = 1;
+    }
+
+  /* Try to replace without the replace flag set.  This should fail.  */
+  if (setenv (VAR, "two", 0) != 0)
+    {
+      printf ("setenv #2 failed: %m\n");
+      result = 1;
+    }
+
+  /* The value shouldn't have changed.  */
+  valp = getenv (VAR);
+  if (valp == NULL || strcmp (valp, "one") != 0)
+    {
+      puts ("getenv #3 failed");
+      result = 1;
+    }
+
+  /* Now replace the value using putenv.  */
+  if (putenv (putenv_val) != 0)
+    {
+      printf ("putenv #1 failed: %m\n");
+      result = 1;
+    }
+
+  /* The value should have changed now.  */
+  valp = getenv (VAR);
+  if (valp == NULL || strcmp (valp, "some longer value") != 0)
+    {
+      printf ("getenv #4 failed (is \"%s\")\n", valp);
+      result = 1;
+    }
+
+  /* Now one tricky check: changing the variable passed in putenv should
+     change the environment.  */
+  strcpy (&putenv_val[sizeof VAR], "a short one");
+
+  /* The value should have changed again.  */
+  valp = getenv (VAR);
+  if (valp == NULL || strcmp (valp, "a short one") != 0)
+    {
+      puts ("getenv #5 failed");
+      result = 1;
+    }
+
+  /* It should even be possible to rename the variable.  */
+  strcpy (putenv_val, "XYZZY=some other value");
+
+  /* Now a lookup using the old name should fail.  */
+  if (getenv (VAR) != NULL)
+    {
+      puts ("getenv #6 failed");
+      result = 1;
+    }
+
+  /* But using the new name it should work.  */
+  valp = getenv ("XYZZY");
+  if (valp == NULL || strcmp (valp, "some other value") != 0)
+    {
+      puts ("getenv #7 failed");
+      result = 1;
+    }
+
+  /* Create a new variable with the old name.  */
+  if (setenv (VAR, "a new value", 0) != 0)
+    {
+      printf ("setenv #3 failed: %m\n");
+      result = 1;
+    }
+
+  /* At this point a getenv call must return the new value.  */
+  valp = getenv (VAR);
+  if (valp == NULL || strcmp (valp, "a new value") != 0)
+    {
+      puts ("getenv #8 failed");
+      result = 1;
+    }
+
+  /* Black magic: rename the variable we added using putenv back.  */
+  strcpy (putenv_val, VAR "=old name new value");
+
+  /* This is interesting.  We have two variables with the same name.
+     Getting a value should return one of them.  */
+  valp = getenv (VAR);
+  if (valp == NULL
+      || (strcmp (valp, "a new value") != 0
+	  && strcmp (valp, "old name new value") != 0))
+    {
+      puts ("getenv #9 failed");
+      result = 1;
+    }
+
+  /* More fun ahead: we are now removing the variable.  This should remove
+     both values.  The cast is ok: this call should never put the string
+     in the environment and it should never modify it.  */
+  putenv ((char *) VAR);
+
+  /* Getting the value should now fail.  */
+  if (getenv (VAR) != NULL)
+    {
+      printf ("getenv #10 failed (\"%s\" found)\n", getenv (VAR));
+      result = 1;
+    }
+
+  /* Now a test with an environment variable that's one character long.
+     This is to test a special case in the getenv implementation.  */
+  strcpy (putenv_val, "X=one character test");
+  if (putenv (putenv_val) != 0)
+    {
+      printf ("putenv #2 failed: %m\n");
+      result = 1;
+    }
+
+  valp = getenv ("X");
+  if (valp == NULL || strcmp (valp, "one character test") != 0)
+    {
+      puts ("getenv #11 failed");
+      result = 1;
+    }
+
+  /* Both setenv and unsetenv should return -1/EINVAL for NULL or "" name
+     or if name contains '=' character.  */
+  errno = 0;
+  if (setenv (NULL, "val", 1) >= 0 || errno != EINVAL)
+    {
+      puts ("setenv #4 failed");
+      result = 1;
+    }
+
+  errno = 0;
+  if (setenv ("", "val", 0) >= 0 || errno != EINVAL)
+    {
+      puts ("setenv #5 failed");
+      result = 1;
+    }
+
+  errno = 0;
+  if (setenv ("var=val", "val", 1) >= 0 || errno != EINVAL)
+    {
+      puts ("setenv #6 failed");
+      result = 1;
+    }
+
+  /* This deliberately tests supplying a null pointer to a function whose
+     argument is marked __attribute__ ((nonnull)). */
+  DIAG_PUSH_NEEDS_COMMENT;
+  DIAG_IGNORE_NEEDS_COMMENT(5, "-Wnonnull");
+  errno = 0;
+  if (unsetenv (NULL) >= 0 || errno != EINVAL)
+    {
+      puts ("unsetenv #1 failed");
+      result = 1;
+    }
+  DIAG_POP_NEEDS_COMMENT;
+
+  errno = 0;
+  if (unsetenv ("") >= 0 || errno != EINVAL)
+    {
+      puts ("unsetenv #2 failed");
+      result = 1;
+    }
+
+  errno = 0;
+  if (unsetenv ("x=y") >= 0 || errno != EINVAL)
+    {
+      puts ("unsetenv #3 failed");
+      result = 1;
+    }
+
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"