add preadv/pwritev test

1 files changed, 125 insertions, 0 deletions

diff --git a/test/misc/tst-preadvwritev.c b/test/misc/tst-preadvwritev.c
new file mode 100644
index 0000000..e9818d4
--- /dev/null
+++ b/test/misc/tst-preadvwritev.c
@@ -0,0 +1,125 @@
+/* Tests for preadv and pwritev.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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/>.  */
+
+#define __USE_MISC
+#include <sys/uio.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_filename;
+static int temp_fd;
+
+static void
+do_prepare (void)
+{
+  temp_fd = create_temp_file ("tst-preadvwritev.", &temp_filename);
+  if (temp_fd == -1)
+    {
+      printf ("cannot create temporary file: %m\n");
+      exit (1);
+    }
+}
+
+#if defined(preadv) && defined(pwritev)
+
+#define FAIL(str) \
+  do { printf ("error: %s (line %d)\n", str, __LINE__); return 1; } while (0)
+
+static int
+do_test_with_offset (off_t offset)
+{
+  struct iovec iov[2];
+  ssize_t ret;
+
+  char buf1[32];
+  char buf2[64];
+
+  memset (buf1, 0xf0, sizeof buf1);
+  memset (buf2, 0x0f, sizeof buf2);
+
+  /* Write two buffer with 32 and 64 bytes respectively.  */
+  memset (iov, 0, sizeof iov);
+  iov[0].iov_base = buf1;
+  iov[0].iov_len = sizeof buf1;
+  iov[1].iov_base = buf2;
+  iov[1].iov_len = sizeof buf2;
+
+  ret = pwritev (temp_fd, iov, 2, offset);
+  if (ret == -1)
+    FAIL ("first pwritev returned -1");
+  if (ret != (sizeof buf1 + sizeof buf2))
+    FAIL ("first pwritev returned an unexpected value");
+
+  ret = pwritev (temp_fd, iov, 2, sizeof buf1 + sizeof buf2 + offset);
+  if (ret == -1)
+    FAIL ("second pwritev returned -1");
+  if (ret != (sizeof buf1 + sizeof buf2))
+    FAIL ("second pwritev returned an unexpected value");
+
+  char buf3[32];
+  char buf4[64];
+
+  memset (buf3, 0x0f, sizeof buf3);
+  memset (buf4, 0xf0, sizeof buf4);
+
+  iov[0].iov_base = buf3;
+  iov[0].iov_len = sizeof buf3;
+  iov[1].iov_base = buf4;
+  iov[1].iov_len = sizeof buf4;
+
+  /* Now read two buffer with 32 and 64 bytes respectively.  */
+  ret = preadv (temp_fd, iov, 2, offset);
+  if (ret == -1)
+    FAIL ("first preadv returned -1");
+  if (ret != (sizeof buf3 + sizeof buf4))
+    FAIL ("first preadv returned an unexpected value");
+
+  if (memcmp (buf1, buf3, sizeof buf1) != 0)
+    FAIL ("first buffer from first preadv different than expected");
+  if (memcmp (buf2, buf4, sizeof buf2) != 0)
+    FAIL ("second buffer from first preadv different than expected");
+
+  ret = preadv (temp_fd, iov, 2, sizeof buf3 + sizeof buf4 + offset);
+  if (ret == -1)
+    FAIL ("second preadv returned -1");
+  if (ret != (sizeof buf3 + sizeof buf4))
+    FAIL ("second preadv returned an unexpected value");
+
+  /* And compare the buffers read and written to check if there are equal.  */
+  if (memcmp (buf1, buf3, sizeof buf1) != 0)
+    FAIL ("first buffer from second preadv different than expected");
+  if (memcmp (buf2, buf4, sizeof buf2) != 0)
+    FAIL ("second buffer from second preadv different than expected");
+
+  return 0;
+}
+#endif
+
+static int
+do_test (void)
+{
+#if defined(preadv) && defined(pwritev)
+  return do_test_with_offset (0);
+#else
+  return 23;
+#endif
+}