Add the `getppid()` function to glibc to retrieve a process's
parent process ID.  See POSIX:
http://pubs.opengroup.org/onlinepubs/009695399/functions/getppid.html

Rebuild and reinstall glibc.

Change-Id: I116129292da56bfd53cc2e6a23d9c9bb7c6246d1
Signed-off-by: Dan Cross <[email protected]>
---
 .../glibc-2.19-akaros/sysdeps/akaros/getppid.c     | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 
tools/compilers/gcc-glibc/glibc-2.19-akaros/sysdeps/akaros/getppid.c

diff --git 
a/tools/compilers/gcc-glibc/glibc-2.19-akaros/sysdeps/akaros/getppid.c 
b/tools/compilers/gcc-glibc/glibc-2.19-akaros/sysdeps/akaros/getppid.c
new file mode 100644
index 0000000..5d75f44
--- /dev/null
+++ b/tools/compilers/gcc-glibc/glibc-2.19-akaros/sysdeps/akaros/getppid.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 1991, 1995, 1996, 1997, 2002 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 <errno.h>
+#include <unistd.h>
+#include <ros/syscall.h>
+#include <ros/procinfo.h>
+
+/* Get the process ID of the calling process's parent. */
+int
+__getppid ()
+{
+  return __procinfo.ppid;
+}
+weak_alias(__getppid, getppid)
-- 
2.8.0.rc3.226.g39d4020

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