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-rw-r--r--sysdeps/unix/sysv/linux/semctl.c31
1 files changed, 24 insertions, 7 deletions
diff --git a/sysdeps/unix/sysv/linux/semctl.c b/sysdeps/unix/sysv/linux/semctl.c
index 3d95e08d98..c87b407d2c 100644
--- a/sysdeps/unix/sysv/linux/semctl.c
+++ b/sysdeps/unix/sysv/linux/semctl.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995, 1997 Free Software Foundation, Inc.
+/* 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.
@@ -17,17 +17,34 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
+#include <stdarg.h>
#include <sys/sem.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 */
+};
+
+
/* Return identifier for array of NSEMS semaphores associated with
KEY. */
int
-semctl (semid, semnum, cmd, arg)
- int semid;
- int semnum;
- int cmd;
- union semun arg;
+semctl (int semid, int semnum, int cmd, ...)
{
- return __ipc (IPCOP_semctl, semid, semnum, cmd, &arg);
+ union semun *arg;
+ va_list ap;
+
+ va_start (ap, cmd);
+
+ /* Get a pointer the argument. */
+ arg = &va_arg (ap, union semun);
+
+ va_end (ap);
+
+ return __ipc (IPCOP_semctl, semid, semnum, cmd, arg);
}