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, 137 insertions, 0 deletions

diff --git a/REORG.TODO/libio/tst-mmap2-eofsync.c b/REORG.TODO/libio/tst-mmap2-eofsync.c
new file mode 100644
index 0000000000..05dedb8c20
--- /dev/null
+++ b/REORG.TODO/libio/tst-mmap2-eofsync.c
@@ -0,0 +1,137 @@
+/* Test program for synchronization of stdio state with file after EOF.  */
+
+#include <stdio.h>
+#include <error.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+static void do_prepare (void);
+#define PREPARE(argc, argv) do_prepare ()
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+#include <test-skeleton.c>
+
+static char *temp_file;
+static int temp_fd;
+
+static char *pages;
+
+static void
+do_prepare (void)
+{
+  pages = xmalloc (getpagesize () * 2);
+  memset (pages, 'a', getpagesize ());
+  memset (pages + getpagesize (), 'b', getpagesize ());
+
+  temp_fd = create_temp_file ("tst-mmap2-eofsync.", &temp_file);
+  if (temp_fd == -1)
+    error (1, errno, "cannot create temporary file");
+  else
+    {
+      ssize_t cc = write (temp_fd, pages, getpagesize ());
+      if (cc != getpagesize ())
+	error (1, errno, "cannot write to temporary file");
+    }
+}
+
+static int
+do_test (void)
+{
+  const size_t pagesize = getpagesize ();
+  FILE *f;
+  char buf[pagesize];
+  int result = 0;
+  int c;
+
+  f = fopen (temp_file, "rm");
+  if (f == NULL)
+    {
+      perror (temp_file);
+      return 1;
+    }
+
+  if (fread (buf, pagesize, 1, f) != 1)
+    {
+      perror ("fread");
+      return 1;
+    }
+
+  if (memcmp (buf, pages, pagesize))
+    {
+      puts ("data mismatch in page 1");
+      result = 1;
+    }
+
+  printf ("feof = %d, ferror = %d immediately after fread\n",
+	  feof (f), ferror (f));
+
+  c = fgetc (f);
+  if (c == EOF)
+    printf ("fgetc -> EOF (feof = %d, ferror = %d)\n",
+	    feof (f), ferror (f));
+  else
+    {
+      printf ("fgetc returned %o (feof = %d, ferror = %d)\n",
+	      c, feof (f), ferror (f));
+      result = 1;
+    }
+
+  c = write (temp_fd, pages + pagesize, pagesize);
+  if (c == (ssize_t) pagesize)
+    printf ("wrote more to file\n");
+  else
+    {
+      printf ("wrote %d != %zd (%m)\n", c, pagesize);
+      result = 1;
+    }
+
+  if (fread (buf, pagesize, 1, f) != 1)
+    {
+      printf ("second fread fails: feof = %d, ferror = %d (%m)\n",
+	      feof (f), ferror (f));
+      clearerr (f);
+      if (fread (buf, pagesize, 1, f) != 1)
+	{
+	  printf ("retry fread fails: feof = %d, ferror = %d (%m)\n",
+		  feof (f), ferror (f));
+	  result = 1;
+	}
+    }
+  if (result == 0 && memcmp (buf, pages + pagesize, pagesize))
+    {
+      puts ("data mismatch in page 2");
+      result = 1;
+    }
+
+  fseek (f, pagesize - 1, SEEK_SET);
+  c = fgetc (f);
+  if (c != 'a')
+    {
+      printf ("fgetc at end of page 1 read '%c' (%m)\n", c);
+      result = 1;
+    }
+
+  if (ftruncate (temp_fd, pagesize) < 0)
+    {
+      printf ("ftruncate failed: %m\n");
+      result = 1;
+    }
+
+  fflush (f);
+
+  c = fgetc (f);
+  if (c == EOF)
+    printf ("after truncate fgetc -> EOF (feof = %d, ferror = %d)\n",
+	    feof (f), ferror (f));
+  else
+    {
+      printf ("after truncate fgetc returned '%c' (feof = %d, ferror = %d)\n",
+	      c, feof (f), ferror (f));
+      result = 1;
+    }
+
+  fclose (f);
+
+  return result;
+}