1 files changed, 79 insertions, 0 deletions
diff --git a/libc/misc/sysvipc/sem.c b/libc/misc/sysvipc/sem.c
new file mode 100644
index 000000000..83724d4c6
--- /dev/null
+++ b/libc/misc/sysvipc/sem.c
@@ -0,0 +1,79 @@
+/* Copyright (C) 1995, 1997, 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <sys/sem.h>
+#include "ipc.h"
+
+#ifdef L_semctl
+/* Return identifier for array of NSEMS semaphores associated with
+   KEY.  */
+#include <stdarg.h>
+/* Define a `union semun' suitable for Linux here.  */
+union semun
+{
+    int val;			/* value for SETVAL */
+    struct semid_ds *buf;		/* buffer for IPC_STAT & IPC_SET */
+    unsigned short int *array;	/* array for GETALL & SETALL */
+    struct seminfo *__buf;	/* buffer for IPC_INFO */
+};
+
+
+int
+semctl (int semid, int semnum, int cmd, ...)
+{
+    union semun arg;
+    va_list ap;
+
+    va_start (ap, cmd);
+
+    /* Get the argument.  */
+    arg = va_arg (ap, union semun);
+
+    va_end (ap);
+
+    return __ipc(IPCOP_semctl, semid, semnum, cmd, &arg);
+}    
+#endif
+
+#ifdef L_semget
+#include <stdlib.h>		/* for definition of NULL */
+/* Return identifier for array of NSEMS semaphores associated with
+   KEY.  */
+int
+semget (key, nsems, semflg)
+    key_t key;
+    int nsems;
+    int semflg;
+{
+    return __ipc(IPCOP_semget, key, nsems, semflg, NULL);
+}
+#endif
+
+#ifdef L_semop
+/* Perform user-defined atomical operation of array of semaphores.  */
+int
+semop (semid, sops, nsops)
+    int semid;
+    struct sembuf *sops;
+    unsigned int nsops;
+{
+    return __ipc(IPCOP_semop, semid, (int) nsops, 0, sops);
+}
+#endif