--- ../busybox-1.23.2.orig/libbb/missing_syscalls.c	2015-03-23 06:06:55.000000000 +0300
+++ ./libbb/missing_syscalls.c	2015-09-27 12:54:00.630566524 +0300
@@ -39,4 +39,58 @@
 {
 	return syscall(__NR_pivot_root, new_root, put_old);
 }
+
+int swapoff(const char *path)
+{
+  return syscall(__NR_swapoff, path);
+}
+
+int swapon(const char *path, int swapflags)
+{
+  return syscall(__NR_swapon, path, swapflags);
+}
+
+int shmget(key_t key, size_t size, int shmflg)
+{
+  return syscall(__NR_shmget, key, size, shmflg);
+}
+
+int shmdt(const void *shmaddr)
+{
+  return syscall(__NR_shmdt, shmaddr);
+}
+
+void *shmat(int shmid, const void *shmaddr, int shmflg)
+{
+  return (void *)syscall(__NR_shmat, shmid, shmaddr, shmflg);
+}
+
+int msgget(key_t key, int msgflg)
+{
+  return syscall(__NR_msgget, key, msgflg);
+}
+
+int semget(key_t key, int nsems, int semflg)
+{
+  return syscall(__NR_semget, key, nsems, semflg);
+}
+
+struct msqid_ds; /* #include <linux/msg.h> */
+int msgctl(int msqid, int cmd, struct msqid_ds *buf)
+{
+  return syscall(__NR_msgctl, msqid, cmd, buf);
+}
+
+struct shmid_ds; /* #include <linux/shm.h> */
+// NOTE: IPC_INFO takes a struct shminfo64
+int shmctl(int shmid, int cmd, struct shmid_ds *buf)
+{
+  return syscall(__NR_shmctl, shmid, cmd, buf);
+}
+
+struct sembuf; /* #include <linux/sem.h> */
+int semop(int semid, struct sembuf *sops, unsigned nsops)
+{
+  return syscall(__NR_semop, semid, sops, nsops);
+}
 #endif
--- ../busybox-1.23.2.orig/libbb/semctl.c	1970-01-01 03:00:00.000000000 +0300
+++ ./libbb/semctl.c	2015-09-27 12:50:17.231609427 +0300
@@ -0,0 +1,58 @@
+/* Copyright (C) 1995,1997,1998,2000,2003,2004,2006
+        Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+   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.  */
+/* originally from glibc-2.14/sysdeps/unix/sysv/linux/semctl.c, modified */
+
+// syscall used by syslogd, ipcrm, ipcs
+//kbuild:lib-y += semctl.o
+
+#include <sys/syscall.h>   /* For __NR_xxx definitions */
+#include <stdarg.h>
+#include <linux/sem.h>
+#include "libbb.h"
+
+/* code from GLIBC */
+int semctl(int semid, int semnum, int cmd, ...) {
+  union semun arg;
+  va_list ap;
+
+  va_start (ap, cmd);
+
+  /* Get the argument only if required.  */
+  arg.buf = NULL;
+  switch (cmd)
+  {
+    case SETVAL:        /* arg.val */
+    case GETALL:        /* arg.array */
+    case SETALL:
+    case IPC_STAT:      /* arg.buf */
+    case IPC_SET:
+    case SEM_STAT:
+    case IPC_INFO:      /* arg.__buf */
+    case SEM_INFO:
+      va_start (ap, cmd);
+      arg = va_arg (ap, union semun);
+      va_end (ap);
+      break;
+  }
+
+  va_end (ap);
+
+  return syscall(__NR_semctl, semid, semnum, cmd, arg);
+}