From ce4e0d023bd28ef449ea4656b6860c96d76f5599 Mon Sep 17 00:00:00 2001
From: Lubos Dolezel <lubos@dolezel.info>
Date: Wed, 1 Feb 2017 23:47:05 +0100
Subject: [PATCH] Implement sys_faccessat()

---
 src/kernel/emulation/linux/CMakeLists.txt     |  1 +
 src/kernel/emulation/linux/syscalls.c         |  2 ++
 src/kernel/emulation/linux/unistd/faccessat.c | 17 +++++++++++++++++
 src/kernel/emulation/linux/unistd/faccessat.h |  7 +++++++
 4 files changed, 27 insertions(+)
 create mode 100644 src/kernel/emulation/linux/unistd/faccessat.c
 create mode 100644 src/kernel/emulation/linux/unistd/faccessat.h

diff --git a/src/kernel/emulation/linux/CMakeLists.txt b/src/kernel/emulation/linux/CMakeLists.txt
index cb6efbc6a..302536a67 100644
--- a/src/kernel/emulation/linux/CMakeLists.txt
+++ b/src/kernel/emulation/linux/CMakeLists.txt
@@ -59,6 +59,7 @@ set(emulation_sources
 	unistd/ftruncate.c
 	unistd/truncate.c
 	unistd/access.c
+	unistd/faccessat.c
 	unistd/readlink.c
 	unistd/symlink.c
 	unistd/link.c
diff --git a/src/kernel/emulation/linux/syscalls.c b/src/kernel/emulation/linux/syscalls.c
index 6409793e2..0f78f20e1 100644
--- a/src/kernel/emulation/linux/syscalls.c
+++ b/src/kernel/emulation/linux/syscalls.c
@@ -25,6 +25,7 @@
 #include "unistd/pwrite.h"
 #include "unistd/getpid.h"
 #include "unistd/access.h"
+#include "unistd/faccessat.h"
 #include "unistd/lseek.h"
 #include "unistd/truncate.h"
 #include "unistd/ftruncate.h"
@@ -340,6 +341,7 @@ void* __bsd_syscall_table[600] = {
 	[463] = sys_openat,
 	[464] = sys_openat_nocancel,
 	[465] = sys_renameat,
+	[466] = sys_faccessat,
 	[469] = sys_fstatat,
 	[470] = sys_fstatat64,
 	[500] = sys_getentropy,
diff --git a/src/kernel/emulation/linux/unistd/faccessat.c b/src/kernel/emulation/linux/unistd/faccessat.c
new file mode 100644
index 000000000..5d7fc50a1
--- /dev/null
+++ b/src/kernel/emulation/linux/unistd/faccessat.c
@@ -0,0 +1,17 @@
+#include "faccessat.h"
+#include "../base.h"
+#include "../errno.h"
+#include <linux-syscalls/linux.h>
+#include "../common_at.h"
+
+long sys_faccessat(int fd, const char* filename, int amode, int flag)
+{
+	int ret;
+
+	ret = LINUX_SYSCALL(__NR_faccessat, atfd(fd), filename, amode, atflags_bsd_to_linux(flag));
+
+	if (ret < 0)
+		ret = errno_linux_to_bsd(ret);
+
+	return ret;
+}
diff --git a/src/kernel/emulation/linux/unistd/faccessat.h b/src/kernel/emulation/linux/unistd/faccessat.h
new file mode 100644
index 000000000..297647245
--- /dev/null
+++ b/src/kernel/emulation/linux/unistd/faccessat.h
@@ -0,0 +1,7 @@
+#ifndef LINUX_FACCESSAT_H
+#define LINUX_FACCESSAT_H
+
+long sys_faccessat(int fd, const char* filename, int amode, int flag);
+
+#endif
+
-- 
2.51.2