/* Copyright (C) 1995-2016 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 <errno.h> #include <sys/shm.h> #include <ipc_priv.h> #include <sysdep.h> #include <unistd.h> #include <sys/syscall.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) { INTERNAL_SYSCALL_DECL(err); unsigned long resultvar; void *raddr; resultvar = INTERNAL_SYSCALL (ipc, err, 5, IPCOP_shmat, shmid, shmflg, (long int) &raddr, (void *) shmaddr); if (INTERNAL_SYSCALL_ERROR_P (resultvar, err)) return (void *) INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (resultvar, err)); return raddr; }