1 files changed, 42 insertions, 0 deletions

diff --git a/lib/libc/gen/semctl.c b/lib/libc/gen/semctl.c
new file mode 100644
index 000000000000..03ecdbc8ce6e
--- /dev/null
+++ b/lib/libc/gen/semctl.c
@@ -0,0 +1,42 @@
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+#include <stdlib.h>
+
+#if __STDC__
+int semctl(int semid, int semnum, int cmd, ...)
+#else
+int semctl(semid, semnum, cmd, va_alist)
+	int semid, semnum;
+	int cmd;
+	va_dcl
+#endif
+{
+	va_list ap;
+	union semun semun;
+	union semun *semun_ptr;
+#if __STDC__
+	va_start(ap, cmd);
+#else
+	va_start(ap);
+#endif
+	if (cmd == IPC_SET || cmd == IPC_STAT || cmd == GETALL
+	    || cmd == SETVAL || cmd == SETALL) {
+		semun = va_arg(ap, union semun);
+		semun_ptr = &semun;
+	} else {
+		semun_ptr = NULL;
+	}
+	va_end(ap);
+
+#ifdef	__NETBSD_SYSCALLS
+	return (__semctl(semid, semnum, cmd, semun_ptr));
+#else
+	return (semsys(0, semid, semnum, cmd, semun_ptr));
+#endif
+}