add posix_fadvise / posix_fadvise64 support

1 files changed, 34 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/posix_fadvise.c b/libc/sysdeps/linux/common/posix_fadvise.c
new file mode 100644
index 000000000..b75a6c313
--- /dev/null
+++ b/libc/sysdeps/linux/common/posix_fadvise.c
@@ -0,0 +1,34 @@
+/* vi: set sw=4 ts=4: */
+/* 
+ * posix_fadvise() for uClibc
+ * http://www.opengroup.org/onlinepubs/009695399/functions/posix_fadvise.html
+ *
+ * Copyright (C) 2000-2005 by Erik Andersen <andersen@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ */
+
+#include "syscalls.h"
+#include <fcntl.h>
+
+#ifdef __NR_fadvise64
+#define __NR___syscall_fadvise64 __NR_fadvise64
+_syscall4(int, __syscall_fadvise64, int, fd, off_t, offset, 
+          off_t, len, int, advice);
+int __libc_posix_fadvise(int fd, off_t offset, off_t len, int advice)
+{
+	return (__syscall_fadvise64(fd, offset, len, advice));
+}
+weak_alias(__libc_posix_fadvise, posix_fadvise);
+
+#else
+int posix_fadvise(int fd, off_t offset, off_t len, int advice)
+{
+    __set_errno(ENOSYS);
+    return -1;
+}
+#endif
+
+#if ! defined __NR_fadvise64_64 && defined __UCLIBC_HAS_LFS__
+weak_alias(__libc_posix_fadvise, posix_fadvise64);
+#endif