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- /* Copyright (C) 1995-2019 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, see
- <http://www.gnu.org/licenses/>. */
- #include <sys/msg.h>
- #include <ipc_priv.h>
- #include <sysdep.h>
- #include <errno.h>
- /* Attach the shared memory segment associated with SHMID to the data
- segment of the calling process. SHMADDR and SHMFLG determine how
- and where the segment is attached. */
- void *
- shmat (int shmid, const void *shmaddr, int shmflg)
- {
- #ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
- return (void*) INLINE_SYSCALL_CALL (shmat, shmid, shmaddr, shmflg);
- #else
- INTERNAL_SYSCALL_DECL(err);
- unsigned long resultvar;
- void *raddr;
- resultvar = INTERNAL_SYSCALL_CALL (ipc, err, IPCOP_shmat, shmid, shmflg,
- &raddr, shmaddr);
- if (INTERNAL_SYSCALL_ERROR_P (resultvar, err))
- return (void *) INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (resultvar,
- err));
- return raddr;
- #endif
- }
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