1 files changed, 98 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tst-fallocate-common.c b/sysdeps/unix/sysv/linux/tst-fallocate-common.c
new file mode 100644
index 0000000000..a6ba403c62
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tst-fallocate-common.c
@@ -0,0 +1,98 @@
+/* Basic fallocate test (no specific flags is checked).
+   Copyright (C) 2016-2018 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/>.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <support/support.h>
+#include <support/check.h>
+#include <support/temp_file.h>
+
+#define XSTR(s) STR(S)
+#define STR(s)  #s
+
+static char *temp_filename;
+static int temp_fd;
+
+static void
+do_prepare (int argc, char **argv)
+{
+  temp_fd = create_temp_file ("tst-fallocate.", &temp_filename);
+  if (temp_fd == -1)
+    FAIL_EXIT1 ("cannot create temporary file: %m");
+}
+#define PREPARE do_prepare
+
+static int
+do_test_with_offset (off_t offset)
+{
+  int ret;
+  struct stat finfo;
+#define BLK_SIZE 1024
+  char bwrite[BLK_SIZE] = { 0xf0 };
+  char bread[BLK_SIZE];
+
+  /* It tries to fallocate 1024 bytes from 'offset' and then write 1024 bytes.
+     After both operation rewind the file descriptor and read 1024 bytes
+     and check if both buffer have the same contents.  */
+  ret = fallocate (temp_fd, 0, offset, BLK_SIZE);
+  if (ret == -1)
+    {
+      /* fallocate might not be fully supported by underlying filesystem (for
+	 instance some NFS versions).   */
+      if (errno == EOPNOTSUPP)
+	FAIL_EXIT (77, "fallocate not supported");
+      FAIL_EXIT1 ("fallocate failed");
+    }
+
+  ret = fstat (temp_fd, &finfo);
+  if (ret == -1)
+    FAIL_EXIT1 ("fstat failed");
+
+  if (finfo.st_size < (offset + BLK_SIZE))
+    FAIL_EXIT1 ("size of first fallocate less than expected (%llu)",
+		(long long unsigned int)offset + BLK_SIZE);
+
+  if (lseek (temp_fd, offset, SEEK_SET) == (off_t) -1)
+    FAIL_EXIT1 ("fseek (0, SEEK_SET) failed");
+
+  if (write (temp_fd, bwrite, BLK_SIZE) != BLK_SIZE)
+    FAIL_EXIT1 ("fail trying to write " XSTR (BLK_SIZE) " bytes");
+
+  if (lseek (temp_fd, offset, SEEK_SET) == (off_t) -1)
+    FAIL_EXIT1 ("fseek (0, SEEK_SET) failed");
+
+  if (read (temp_fd, bread, BLK_SIZE) != BLK_SIZE)
+    FAIL_EXIT1 ("fail trying to read " XSTR (BLK_SIZE) " bytes");
+
+  if (memcmp (bwrite, bread, BLK_SIZE) != 0)
+    FAIL_EXIT1 ("buffer written different than buffer readed");
+
+  return 0;
+}
+
+/* This function is defined by the individual tests.  */
+static int do_test (void);
+
+#include <support/test-driver.c>