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, 235 insertions, 0 deletions

diff --git a/REORG.TODO/stdlib/test-canon.c b/REORG.TODO/stdlib/test-canon.c
new file mode 100644
index 0000000000..d664f73c45
--- /dev/null
+++ b/REORG.TODO/stdlib/test-canon.c
@@ -0,0 +1,235 @@
+/* Test program for returning the canonical absolute name of a given file.
+   Copyright (C) 1996-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David Mosberger <davidm@azstarnet.com>.
+
+   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/>.  */
+
+/* This file must be run from within a directory called "stdlib".  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+
+/* Prototype for our test function.  */
+extern int do_test (int argc, char *argv[]);
+#include <test-skeleton.c>
+
+#ifndef PATH_MAX
+# define PATH_MAX 4096
+#endif
+static char	cwd[PATH_MAX];
+static size_t	cwd_len;
+
+struct {
+  const char *	name;
+  const char *	value;
+} symlinks[] = {
+  {"SYMLINK_LOOP",	"SYMLINK_LOOP"},
+  {"SYMLINK_1",		"."},
+  {"SYMLINK_2",		"//////./../../etc"},
+  {"SYMLINK_3",		"SYMLINK_1"},
+  {"SYMLINK_4",		"SYMLINK_2"},
+  {"SYMLINK_5",		"doesNotExist"},
+};
+
+struct {
+  const char * in, * out, * resolved;
+  int error;
+} tests[] = {
+  /*  0 */
+  {"/",					"/"},
+  {"/////////////////////////////////",	"/"},
+  {"/.././.././.././..///",		"/"},
+  {"/etc",				"/etc"},
+  {"/etc/../etc",			"/etc"},
+  /*  5 */
+  {"/doesNotExist/../etc",		0, "/doesNotExist", ENOENT},
+  {"./././././././././.",		"."},
+  {"/etc/.//doesNotExist",		0, "/etc/doesNotExist", ENOENT},
+  {"./doesExist",			"./doesExist"},
+  {"./doesExist/",			"./doesExist"},
+  /* 10 */
+  {"./doesExist/../doesExist",		"./doesExist"},
+  {"foobar",				0, "./foobar", ENOENT},
+  {".",					"."},
+  {"./foobar",				0, "./foobar", ENOENT},
+  {"SYMLINK_LOOP",			0, "./SYMLINK_LOOP", ELOOP},
+  /* 15 */
+  {"./SYMLINK_LOOP",			0, "./SYMLINK_LOOP", ELOOP},
+  {"SYMLINK_1",				"."},
+  {"SYMLINK_1/foobar",			0, "./foobar", ENOENT},
+  {"SYMLINK_2",				"/etc"},
+  {"SYMLINK_3",				"."},
+  /* 20 */
+  {"SYMLINK_4",				"/etc"},
+  {"../stdlib/SYMLINK_1",		"."},
+  {"../stdlib/SYMLINK_2",		"/etc"},
+  {"../stdlib/SYMLINK_3",		"."},
+  {"../stdlib/SYMLINK_4",		"/etc"},
+  /* 25 */
+  {"./SYMLINK_5",			0, "./doesNotExist", ENOENT},
+  {"SYMLINK_5",				0, "./doesNotExist", ENOENT},
+  {"SYMLINK_5/foobar",			0, "./doesNotExist", ENOENT},
+  {"doesExist/../../stdlib/doesExist",	"./doesExist"},
+  {"doesExist/.././../stdlib/.",	"."},
+  /* 30 */
+  {"./doesExist/someFile/",		0, "./doesExist/someFile", ENOTDIR},
+  {"./doesExist/someFile/..",		0, "./doesExist/someFile", ENOTDIR},
+};
+
+
+static int
+check_path (const char * result, const char * expected)
+{
+  int good;
+
+  if (!result)
+    return (expected == NULL);
+
+  if (!expected)
+    return 0;
+
+  if (expected[0] == '.' && (expected[1] == '/' || expected[1] == '\0'))
+    good = (strncmp (result, cwd, cwd_len) == 0
+	    && strcmp (result + cwd_len, expected + 1) == 0);
+  else
+    good = (strcmp (expected, result) == 0);
+
+  return good;
+}
+
+
+int
+do_test (int argc, char ** argv)
+{
+  char * result;
+  int i, errors = 0;
+  char buf[PATH_MAX];
+
+  getcwd (cwd, sizeof(buf));
+  cwd_len = strlen (cwd);
+
+  errno = 0;
+  if (realpath (NULL, buf) != NULL || errno != EINVAL)
+    {
+      printf ("%s: expected return value NULL and errno set to EINVAL"
+	      " for realpath(NULL,...)\n", argv[0]);
+      ++errors;
+    }
+
+#if 0
+  /* This is now allowed.  The test is invalid.  */
+  errno = 0;
+  if (realpath ("/", NULL) != NULL || errno != EINVAL)
+    {
+      printf ("%s: expected return value NULL and errno set to EINVAL"
+	      " for realpath(...,NULL)\n", argv[0]);
+      ++errors;
+    }
+#endif
+
+  errno = 0;
+  if (realpath ("", buf) != NULL || errno != ENOENT)
+    {
+      printf ("%s: expected return value NULL and set errno to ENOENT"
+	      " for realpath(\"\",...)\n", argv[0]);
+      ++errors;
+    }
+
+  for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
+    symlink (symlinks[i].value, symlinks[i].name);
+
+  int has_dir = mkdir ("doesExist", 0777) == 0;
+
+  int fd = has_dir ? creat ("doesExist/someFile", 0777) : -1;
+
+  for (i = 0; i < (int) (sizeof (tests) / sizeof (tests[0])); ++i)
+    {
+      buf[0] = '\0';
+      result = realpath (tests[i].in, buf);
+
+      if (!check_path (result, tests[i].out))
+	{
+	  printf ("%s: flunked test %d (expected `%s', got `%s')\n",
+		  argv[0], i, tests[i].out ? tests[i].out : "NULL",
+		  result ? result : "NULL");
+	  ++errors;
+	  continue;
+	}
+
+      if (!check_path (buf, tests[i].out ? tests[i].out : tests[i].resolved))
+	{
+	  printf ("%s: flunked test %d (expected resolved `%s', got `%s')\n",
+		  argv[0], i, tests[i].out ? tests[i].out : tests[i].resolved,
+		  buf);
+	  ++errors;
+	  continue;
+	}
+
+      if (!tests[i].out && errno != tests[i].error)
+	{
+	  printf ("%s: flunked test %d (expected errno %d, got %d)\n",
+		  argv[0], i, tests[i].error, errno);
+	  ++errors;
+	  continue;
+	}
+
+      char *result2 = realpath (tests[i].in, NULL);
+      if ((result2 == NULL && result != NULL)
+	  || (result2 != NULL && strcmp (result, result2) != 0))
+	{
+	  printf ("\
+%s: realpath(..., NULL) produced different result than realpath(..., buf): '%s' vs '%s'\n",
+		  argv[0], result2, result);
+	  ++errors;
+	}
+      free (result2);
+    }
+
+  getcwd (buf, sizeof(buf));
+  if (strcmp (buf, cwd))
+    {
+      printf ("%s: current working directory changed from %s to %s\n",
+	      argv[0], cwd, buf);
+      ++errors;
+    }
+
+  if (fd >= 0)
+    {
+      close (fd);
+      unlink ("doesExist/someFile");
+    }
+
+  if (has_dir)
+    rmdir ("doesExist");
+
+  for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
+    unlink (symlinks[i].name);
+
+  if (errors != 0)
+    {
+      printf ("%d errors.\n", errors);
+      return EXIT_FAILURE;
+    }
+
+  puts ("No errors.");
+  return EXIT_SUCCESS;
+}