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+/* Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+ Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Library General Public License as
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+ published by the Free Software Foundation; either version 2 of the
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+ License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Library General Public License for more details.
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+
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+ You should have received a copy of the GNU Library General Public
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+ License along with the GNU C Library; see the file COPYING.LIB. If not,
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+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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+ Boston, MA 02111-1307, USA. */
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+
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+#include <errno.h>
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+#include <sys/shm.h>
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+#include "ipc.h"
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+
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+#ifdef L_shmat
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+/* Attach the shared memory segment associated with SHMID to the data
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+ segment of the calling process. SHMADDR and SHMFLG determine how
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+ and where the segment is attached. */
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+
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+void *
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+shmat (shmid, shmaddr, shmflg)
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+ int shmid;
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+ const void *shmaddr;
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+ int shmflg;
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+{
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+ int retval;
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+ unsigned long raddr;
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+
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+ retval = __ipc(IPCOP_shmat, shmid, shmflg, (int) &raddr, (void *) shmaddr);
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+ return ((unsigned long int) retval > -(unsigned long int) SHMLBA
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+ ? (void *) retval : (void *) raddr);
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+}
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+#endif
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+
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+#ifdef L_shmctl
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+/* Provide operations to control over shared memory segments. */
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+
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+int
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+shmctl (shmid, cmd, buf)
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+ int shmid;
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+ int cmd;
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+ struct shmid_ds *buf;
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+{
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+ return __ipc(IPCOP_shmctl, shmid, cmd, 0, buf);
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+}
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+#endif
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+
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+
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+#ifdef L_shmdt
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+/* Detach shared memory segment starting at address specified by SHMADDR
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+ from the caller's data segment. */
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+
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+int
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+shmdt (shmaddr)
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+ const void *shmaddr;
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+{
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+ return __ipc(IPCOP_shmdt, 0, 0, 0, (void *) shmaddr);
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+}
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+#endif
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+
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+#ifdef L_shmget
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+/* Return an identifier for an shared memory segment of at least size SIZE
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+ which is associated with KEY. */
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+
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+int
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+shmget (key, size, shmflg)
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+ key_t key;
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+ size_t size;
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+ int shmflg;
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+{
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+ return __ipc(IPCOP_shmget, key, size, shmflg, NULL);
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+}
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+#endif
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