1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/posix_fallocate.c b/sysdeps/unix/sysv/linux/posix_fallocate.c
new file mode 100644
index 0000000000..9cfade60ca
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/posix_fallocate.c
@@ -0,0 +1,60 @@
+/* Copyright (C) 2007 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <fcntl.h>
+#include <kernel-features.h>
+#include <sysdep.h>
+
+#define posix_fallocate static internal_fallocate
+#include <sysdeps/posix/posix_fallocate.c>
+#undef posix_fallocate
+
+#if !defined __ASSUME_FALLOCATE && defined __NR_fallocate
+int __have_fallocate attribute_hidden;
+#endif
+
+
+/* Reserve storage for the data of the file associated with FD.  */
+int
+posix_fallocate (int fd, __off_t offset, __off_t len)
+{
+#ifdef __NR_fallocate
+# ifndef __ASSUME_FALLOCATE
+  if (__builtin_expect (__have_fallocate >= 0, 1))
+# endif
+    {
+      INTERNAL_SYSCALL_DECL (err);
+      int res = INTERNAL_SYSCALL (fallocate, err, 4, fd, 0,
+				  __LONG_LONG_PAIR (offset >> 31, offset),
+				  __LONG_LONG_PAIR (len >> 31, len));
+
+      if (! INTERNAL_SYSCALL_ERROR_P (res, err))
+	return 0;
+
+# ifndef __ASSUME_FALLOCATE
+      if (__builtin_expect (INTERNAL_SYSCALL_ERRNO (res, err) == ENOSYS, 0))
+	__have_fallocate = -1;
+      else
+# endif
+	if (INTERNAL_SYSCALL_ERRNO (res, err) != EOPNOTSUPP)
+	  return INTERNAL_SYSCALL_ERRNO (res, err);
+    }
+#endif
+
+  return internal_fallocate (fd, offset, len);
+}