43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
|
/* Copyright (C) 1995-2022 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
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
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#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
|
||
|
|
unsigned long resultvar;
|
||
|
|
void *raddr;
|
||
|
|
|
||
|
|
resultvar = INTERNAL_SYSCALL_CALL (ipc, IPCOP_shmat, shmid, shmflg,
|
||
|
|
&raddr, shmaddr);
|
||
|
|
if (INTERNAL_SYSCALL_ERROR_P (resultvar))
|
||
|
|
return (void *) INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (resultvar));
|
||
|
|
|
||
|
|
return raddr;
|
||
|
|
#endif
|
||
|
|
}
|