1 files changed, 105 insertions, 0 deletions
diff --git a/libc/posix/tst-preadwrite.c b/libc/posix/tst-preadwrite.c
new file mode 100644
index 000000000..281044858
--- /dev/null
+++ b/libc/posix/tst-preadwrite.c
@@ -0,0 +1,105 @@
+/* Tests for pread and pwrite.
+   Copyright (C) 1998, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <error.h>
+#include <string.h>
+#include <unistd.h>
+
+
+/* Allow testing of the 64-bit versions as well.  */
+#ifndef PREAD
+# define PREAD pread
+# define PWRITE pwrite
+#endif
+
+#define STRINGIFY(s) STRINGIFY2 (s)
+#define STRINGIFY2(s) #s
+
+/* 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;
+
+void
+do_prepare (int argc, char *argv[])
+{
+   char name_len;
+
+#define FNAME FNAME2(TRUNCATE)
+#define FNAME2(s) "/" STRINGIFY(s) "XXXXXX"
+
+   name_len = strlen (test_dir);
+   name = malloc (name_len + sizeof (FNAME));
+   if (name == NULL)
+     error (EXIT_FAILURE, errno, "cannot allocate file name");
+   mempcpy (mempcpy (name, test_dir, name_len), FNAME, sizeof (FNAME));
+   add_temp_file (name);
+
+   /* Open our test file.   */
+   fd = mkstemp (name);
+   if (fd == -1)
+     error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
+}
+
+
+int
+do_test (int argc, char *argv[])
+{
+  char buf[1000];
+  char res[1000];
+  int i;
+
+  memset (buf, '\0', sizeof (buf));
+  memset (res, '\xff', sizeof (res));
+
+  if (write (fd, buf, sizeof (buf)) != sizeof (buf))
+    error (EXIT_FAILURE, errno, "during write");
+
+  for (i = 100; i < 200; ++i)
+    buf[i] = i;
+  if (PWRITE (fd, buf + 100, 100, 100) != 100)
+    error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
+
+  for (i = 450; i < 600; ++i)
+    buf[i] = i;
+  if (PWRITE (fd, buf + 450, 150, 450) != 150)
+    error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PWRITE));
+
+  if (PREAD (fd, res, sizeof (buf) - 50, 50) != sizeof (buf) - 50)
+    error (EXIT_FAILURE, errno, "during %s", STRINGIFY (PREAD));
+
+  close (fd);
+  unlink (name);
+
+  return memcmp (buf + 50, res, sizeof (buf) - 50);
+}