first pass at implementing *at funcs

Tested basic functionality with coreutils and things seem to work.  At
least gives us a basis to jump from.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/mknodat.c b/libc/sysdeps/linux/common/mknodat.c
new file mode 100644
index 000000000..93b9e6e75
--- /dev/null
+++ b/libc/sysdeps/linux/common/mknodat.c
@@ -0,0 +1,25 @@
+/*
+ * mknodat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/stat.h>
+
+#ifdef __NR_mknodat
+int mknodat(int fd, const char *path, mode_t mode, dev_t dev)
+{
+	unsigned long long int k_dev;
+
+	/* We must convert the value to dev_t type used by the kernel.  */
+	k_dev = (dev) & ((1ULL << 32) - 1);
+
+	return INLINE_SYSCALL(mknodat, 4, fd, path, mode, (unsigned int)k_dev);
+}
+libc_hidden_def(mknodat)
+#else
+/* should add emulation with mknod() and /proc/self/fd/ ... */
+#endif