From 55c0eeaa795e54ef50825fb03784da9635bb0b85 Mon Sep 17 00:00:00 2001
From: Lubos Dolezel <lubos@dolezel.info>
Date: Wed, 4 Nov 2015 14:38:54 +0100
Subject: [PATCH] Add sys_getppid()

---
 src/kernel/emulation/linux/CMakeLists.txt   |  1 +
 src/kernel/emulation/linux/syscalls.c       |  2 ++
 src/kernel/emulation/linux/unistd/getppid.c | 16 ++++++++++++++++
 src/kernel/emulation/linux/unistd/getppid.h |  7 +++++++
 4 files changed, 26 insertions(+)
 create mode 100644 src/kernel/emulation/linux/unistd/getppid.c
 create mode 100644 src/kernel/emulation/linux/unistd/getppid.h

diff --git a/src/kernel/emulation/linux/CMakeLists.txt b/src/kernel/emulation/linux/CMakeLists.txt
index 4d1c24d0a..80432d02a 100644
--- a/src/kernel/emulation/linux/CMakeLists.txt
+++ b/src/kernel/emulation/linux/CMakeLists.txt
@@ -55,6 +55,7 @@ set(emulation_sources
 	unistd/umask.c
 	unistd/chroot.c
 	unistd/getgid.c
+	unistd/getppid.c
 	process/vfork.c
 	process/fork.c
 	process/wait4.c
diff --git a/src/kernel/emulation/linux/syscalls.c b/src/kernel/emulation/linux/syscalls.c
index 6b89ffec3..a912cec03 100644
--- a/src/kernel/emulation/linux/syscalls.c
+++ b/src/kernel/emulation/linux/syscalls.c
@@ -41,6 +41,7 @@
 #include "unistd/chmod.h"
 #include "unistd/chown.h"
 #include "unistd/getgid.h"
+#include "unistd/getppid.h"
 #include "signal/kill.h"
 #include "signal/sigaltstack.h"
 #include "signal/sigaction.h"
@@ -125,6 +126,7 @@ void* __bsd_syscall_table[512] = {
 	[33] = sys_access,
 	[36] = sys_sync,
 	[37] = sys_kill,
+	[39] = sys_getppid,
 	[41] = sys_dup,
 	[43] = sys_getegid,
 	[46] = sys_sigaction,
diff --git a/src/kernel/emulation/linux/unistd/getppid.c b/src/kernel/emulation/linux/unistd/getppid.c
new file mode 100644
index 000000000..42e559bd6
--- /dev/null
+++ b/src/kernel/emulation/linux/unistd/getppid.c
@@ -0,0 +1,16 @@
+#include "getppid.h"
+#include "../base.h"
+#include "../errno.h"
+#include <asm/unistd.h>
+
+long sys_getppid(void)
+{
+	int ret;
+
+	ret = LINUX_SYSCALL0(__NR_getppid);
+	if (ret < 0)
+		ret = errno_linux_to_bsd(ret);
+
+	return ret;
+}
+
diff --git a/src/kernel/emulation/linux/unistd/getppid.h b/src/kernel/emulation/linux/unistd/getppid.h
new file mode 100644
index 000000000..1bd5fe2ab
--- /dev/null
+++ b/src/kernel/emulation/linux/unistd/getppid.h
@@ -0,0 +1,7 @@
+#ifndef LINUX_GETPPID_H
+#define LINUX_GETPPID_H
+
+long sys_getppid(void);
+
+#endif
+
-- 
2.51.2