minix/lib/libc/sys-minix/shmctl.c
Ben Gras 3f38115c7b _MINIX_SYSTEM - fixes for in-minix crossbuild
. define _MINIX_SYSTEM for all system code from minix.service.mk
	. hide some system-level declarations and definitions
	  behind _MINIX_SYSTEM to cleanly fix host tool build problems on
	  Minix (such as: NONE being defined and paddr_t being used but not
	  declared)
	. the similar definition _SYSTEM is unsuitable as it changes the
	  values of errno definitions

Change-Id: I407de79e2575115243a074b16e79546a279cfa3e
2014-07-28 17:05:14 +02:00

48 lines
898 B
C

#define _SYSTEM 1
#define _MINIX_SYSTEM 1
#include <sys/cdefs.h>
#include <lib.h>
#include "namespace.h"
#include <minix/rs.h>
#include <lib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
static int get_ipc_endpt(endpoint_t *pt)
{
return minix_rs_lookup("ipc", pt);
}
/* Shared memory control operation. */
int shmctl(int shmid, int cmd, struct shmid_ds *buf)
{
message m;
endpoint_t ipc_pt;
int r;
if (get_ipc_endpt(&ipc_pt) != OK) {
errno = ENOSYS;
return -1;
}
memset(&m, 0, sizeof(m));
m.SHMCTL_ID = shmid;
m.SHMCTL_CMD = cmd;
m.SHMCTL_BUF = (long) buf;
r = _syscall(ipc_pt, IPC_SHMCTL, &m);
if ((cmd == IPC_INFO || cmd == SHM_INFO || cmd == SHM_STAT)
&& (r == OK))
return m.SHMCTL_RET;
return r;
}
#if defined(__minix) && defined(__weak_alias)
__weak_alias(shmctl, __shmctl50)
#endif