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-rw-r--r--REORG.TODO/io/test-lfs.c241
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diff --git a/REORG.TODO/io/test-lfs.c b/REORG.TODO/io/test-lfs.c
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+/* Some basic tests for LFS.
+   Copyright (C) 2000-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Jaeger <aj@suse.de>, 2000.
+
+   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 <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <error.h>
+#include <errno.h>
+#include <sys/resource.h>
+
+/* Prototype for our test function.  */
+extern void do_prepare (int argc, char *argv[]);
+extern int do_test (int argc, char *argv[]);
+
+/* We have a preparation function.  */
+#define PREPARE do_prepare
+
+/* We might need a bit longer timeout.  */
+#define TIMEOUT 20 /* sec */
+
+/* This defines the `main' function and some more.  */
+#include <test-skeleton.c>
+
+/* These are for the temporary file we generate.  */
+char *name;
+int fd;
+
+/* 2^31 = 2GB.  */
+#define TWO_GB 2147483648LL
+
+void
+do_prepare (int argc, char *argv[])
+{
+  size_t name_len;
+  struct rlimit64 rlim;
+
+  name_len = strlen (test_dir);
+  name = xmalloc (name_len + sizeof ("/lfsXXXXXX"));
+  mempcpy (mempcpy (name, test_dir, name_len),
+           "/lfsXXXXXX", sizeof ("/lfsXXXXXX"));
+
+  /* Open our test file.   */
+  fd = mkstemp64 (name);
+  if (fd == -1)
+    {
+      if (errno == ENOSYS)
+	{
+	  /* Fail silently.  */
+	  error (0, 0, "open64 is not supported");
+	  exit (EXIT_SUCCESS);
+	}
+      else
+	error (EXIT_FAILURE, errno, "cannot create temporary file");
+    }
+  add_temp_file (name);
+
+  if (getrlimit64 (RLIMIT_FSIZE, &rlim) != 0)
+    {
+      error (0, errno, "cannot get resource limit");
+      exit (0);
+    }
+  if (rlim.rlim_cur < TWO_GB + 200)
+    {
+      rlim.rlim_cur = TWO_GB + 200;
+      if (setrlimit64 (RLIMIT_FSIZE, &rlim) != 0)
+	{
+	  error (0, errno, "cannot reset file size limits");
+	  exit (0);
+	}
+    }
+}
+
+static void
+test_ftello (void)
+{
+  FILE *f;
+  int ret;
+  off64_t pos;
+
+  f = fopen64 (name, "w");
+
+  ret = fseeko64 (f, TWO_GB+100, SEEK_SET);
+  if (ret == -1 && errno == ENOSYS)
+    {
+      error (0, 0, "fseeko64 is not supported.");
+      exit (EXIT_SUCCESS);
+    }
+  if (ret == -1 && errno == EINVAL)
+    {
+      error (0, 0, "LFS seems not to be supported");
+      exit (EXIT_SUCCESS);
+    }
+  if (ret == -1)
+    {
+      error (0, errno, "fseeko64 failed with error");
+      exit (EXIT_FAILURE);
+    }
+
+  ret = fwrite ("Hello", 1, 5, f);
+  if (ret == -1 && errno == EFBIG)
+    {
+      error (0, errno, "LFS seems not to be supported");
+      exit (EXIT_SUCCESS);
+    }
+
+  if (ret == -1 && errno == ENOSPC)
+    {
+      error (0, 0, "Not enough space to write file.");
+      exit (EXIT_SUCCESS);
+    }
+
+  if (ret != 5)
+    error (EXIT_FAILURE, errno, "Cannot write test string to large file");
+
+  pos = ftello64 (f);
+
+  if (pos != TWO_GB+105)
+    {
+      error (0, 0, "ftello64 gives wrong result.");
+      exit (EXIT_FAILURE);
+    }
+
+  fclose (f);
+}
+
+int
+do_test (int argc, char *argv[])
+{
+  int ret, fd2;
+  struct stat64 statbuf;
+
+  ret = lseek64 (fd, TWO_GB+100, SEEK_SET);
+  if (ret == -1 && errno == ENOSYS)
+    {
+      error (0, 0, "lseek64 is not supported.");
+      exit (EXIT_SUCCESS);
+    }
+  if (ret == -1 && errno == EINVAL)
+    {
+      error (0, 0, "LFS seems not to be supported.");
+      exit (EXIT_SUCCESS);
+    }
+  if (ret == -1)
+    {
+      error (0, errno, "lseek64 failed with error");
+      exit (EXIT_FAILURE);
+    }
+  off64_t offset64 = lseek64 (fd, 0, SEEK_CUR);
+  if (offset64 != TWO_GB + 100)
+    {
+      error (0, 0, "lseek64 did not return expected offset");
+      exit (EXIT_FAILURE);
+    }
+  off_t offset = lseek (fd, 0, SEEK_CUR);
+  if (sizeof (off_t) < sizeof (off64_t))
+    {
+      if (offset != -1 || errno != EOVERFLOW)
+	{
+	  error (0, 0, "lseek did not fail with EOVERFLOW");
+	  exit (EXIT_FAILURE);
+	}
+    }
+  else
+    if (offset != TWO_GB + 100)
+      {
+	error (0, 0, "lseek did not return expected offset");
+	exit (EXIT_FAILURE);
+      }
+
+  ret = write (fd, "Hello", 5);
+  if (ret == -1 && errno == EFBIG)
+    {
+      error (0, 0, "LFS seems not to be supported.");
+      exit (EXIT_SUCCESS);
+    }
+
+  if (ret == -1 && errno == ENOSPC)
+    {
+      error (0, 0, "Not enough space to write file.");
+      exit (EXIT_SUCCESS);
+    }
+
+  if (ret != 5)
+    error (EXIT_FAILURE, errno, "cannot write test string to large file");
+
+  ret = close (fd);
+
+  if (ret == -1)
+    error (EXIT_FAILURE, errno, "error closing file");
+
+  ret = stat64 (name, &statbuf);
+
+  if (ret == -1 && (errno == ENOSYS || errno == EOVERFLOW))
+    error (0, 0, "stat64 is not supported.");
+  else if (ret == -1)
+    error (EXIT_FAILURE, errno, "cannot stat file `%s'", name);
+  else if (statbuf.st_size != (TWO_GB + 100 + 5))
+    error (EXIT_FAILURE, 0, "stat reported size %lld instead of %lld.",
+	   (long long int) statbuf.st_size, (TWO_GB + 100 + 5));
+
+  fd2 = openat64 (AT_FDCWD, name, O_RDWR);
+  if (fd2 == -1)
+    {
+      if (errno == ENOSYS)
+	{
+	  /* Silently ignore this test.  */
+	  error (0, 0, "openat64 is not supported");
+	}
+      else
+	error (EXIT_FAILURE, errno, "openat64 failed to open big file");
+    }
+  else
+    {
+      ret = close (fd2);
+
+      if (ret == -1)
+	error (EXIT_FAILURE, errno, "error closing file");
+    }
+
+  test_ftello ();
+
+  return 0;
+}