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, 200 insertions, 0 deletions

diff --git a/REORG.TODO/posix/tst-mmap.c b/REORG.TODO/posix/tst-mmap.c
new file mode 100644
index 0000000000..5e52b49e35
--- /dev/null
+++ b/REORG.TODO/posix/tst-mmap.c
@@ -0,0 +1,200 @@
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+
+static int
+do_test (void)
+{
+  int result = 0;
+  FILE *fp;
+  size_t c;
+  char buf[1000];
+  int fd;
+  unsigned char *ptr;
+  size_t ps = sysconf (_SC_PAGESIZE);
+  void *mem;
+
+  /* Create a file and put some data in it.  */
+  fp = tmpfile ();
+  if (fp == NULL)
+    {
+      printf ("Cannot create temporary file: %m\n");
+      return 1;
+    }
+  fd = fileno (fp);
+
+  for (c = 0; c < sizeof (buf); ++c)
+    buf[c] = '0' + (c % 10);
+
+  for (c = 0; c < (ps * 4) / sizeof (buf); ++c)
+    if (fwrite (buf, 1, sizeof (buf), fp) != sizeof (buf))
+      {
+	printf ("`fwrite' failed: %m\n");
+	return 1;
+      }
+  fflush (fp);
+  assert (ps + 1000 < c * sizeof (buf));
+
+  /* First try something which is not allowed: map at an offset which is
+     not modulo the pagesize.  */
+  ptr = mmap (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps - 1);
+  if (ptr != MAP_FAILED)
+    {
+      puts ("mapping at offset with mod pagesize != 0 succeeded!");
+      result = 1;
+    }
+  else if (errno != EINVAL && errno != ENOSYS)
+    {
+      puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
+      result = 1;
+    }
+
+  /* Try the same for mmap64.  */
+  ptr = mmap64 (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps - 1);
+  if (ptr != MAP_FAILED)
+    {
+      puts ("mapping at offset with mod pagesize != 0 succeeded!");
+      result = 1;
+    }
+  else if (errno != EINVAL && errno != ENOSYS)
+    {
+      puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
+      result = 1;
+    }
+
+  /* And the same for private mapping.  */
+  ptr = mmap (NULL, 1000, PROT_READ, MAP_PRIVATE, fd, ps - 1);
+  if (ptr != MAP_FAILED)
+    {
+      puts ("mapping at offset with mod pagesize != 0 succeeded!");
+      result = 1;
+    }
+  else if (errno != EINVAL && errno != ENOSYS)
+    {
+      puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
+      result = 1;
+    }
+
+  /* Try the same for mmap64.  */
+  ptr = mmap64 (NULL, 1000, PROT_READ, MAP_PRIVATE, fd, ps - 1);
+  if (ptr != MAP_FAILED)
+    {
+      puts ("mapping at offset with mod pagesize != 0 succeeded!");
+      result = 1;
+    }
+  else if (errno != EINVAL && errno != ENOSYS)
+    {
+      puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
+      result = 1;
+    }
+
+  /* Get a valid address.  */
+  mem = malloc (2 * ps);
+  if (mem != NULL)
+    {
+      /* Now we map at an address which is not mod pagesize.  */
+      ptr = mmap (mem + 1, 1000, PROT_READ, MAP_SHARED | MAP_FIXED, fd, ps);
+      if (ptr != MAP_FAILED)
+	{
+	  puts ("mapping at address with mod pagesize != 0 succeeded!");
+	  result = 1;
+	}
+      else  if (errno != EINVAL && errno != ENOSYS)
+	{
+	  puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
+	  result = 1;
+	}
+
+      /* Try the same for mmap64.  */
+      ptr = mmap64 (mem + 1, 1000, PROT_READ, MAP_SHARED | MAP_FIXED, fd, ps);
+      if (ptr != MAP_FAILED)
+	{
+	  puts ("mapping at address with mod pagesize != 0 succeeded!");
+	  result = 1;
+	}
+      else  if (errno != EINVAL && errno != ENOSYS)
+	{
+	  puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
+	  result = 1;
+	}
+
+      /* And again for MAP_PRIVATE.  */
+      ptr = mmap (mem + 1, 1000, PROT_READ, MAP_PRIVATE | MAP_FIXED, fd, ps);
+      if (ptr != MAP_FAILED)
+	{
+	  puts ("mapping at address with mod pagesize != 0 succeeded!");
+	  result = 1;
+	}
+      else  if (errno != EINVAL && errno != ENOSYS)
+	{
+	  puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
+	  result = 1;
+	}
+
+      /* Try the same for mmap64.  */
+      ptr = mmap64 (mem + 1, 1000, PROT_READ, MAP_PRIVATE | MAP_FIXED, fd, ps);
+      if (ptr != MAP_FAILED)
+	{
+	  puts ("mapping at address with mod pagesize != 0 succeeded!");
+	  result = 1;
+	}
+      else  if (errno != EINVAL && errno != ENOSYS)
+	{
+	  puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
+	  result = 1;
+	}
+
+      free (mem);
+    }
+
+  /* Now map the memory and see whether the content of the mapped area
+     is correct.  */
+  ptr = mmap (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps);
+  if (ptr == MAP_FAILED)
+    {
+      if (errno != ENOSYS)
+	{
+	  printf ("cannot mmap file: %m\n");
+	  result = 1;
+	}
+    }
+  else
+    {
+      for (c = ps; c < ps + 1000; ++c)
+	if (ptr[c - ps] != '0' + (c % 10))
+	  {
+	    printf ("wrong data mapped at offset %zd\n", c);
+	    result = 1;
+	  }
+    }
+
+  /* And for mmap64. */
+  ptr = mmap64 (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps);
+  if (ptr == MAP_FAILED)
+    {
+      if (errno != ENOSYS)
+	{
+	  printf ("cannot mmap file: %m\n");
+	  result = 1;
+	}
+    }
+  else
+    {
+      for (c = ps; c < ps + 1000; ++c)
+	if (ptr[c - ps] != '0' + (c % 10))
+	  {
+	    printf ("wrong data mapped at offset %zd\n", c);
+	    result = 1;
+	  }
+    }
+
+  /* That's it.  */
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"