48f20655ac
- new call names, message field aliases, call tables; - initialize all ABI request messages to zero; - format callnr.h in the same way as com.h; - remove param.h namespace pollution in servers; - make brk(2) go to VM directly, rather than through PM; - remove obsolete WAIT and BRK calls from PM; - remove obsolete UTIME call from VFS; - clean up path copying routine in VFS; - move system calls from libminlib to libc; - correct some errno-related mistakes in libc routines; Change-Id: I2d8ec5d061cd7e0b30c51ffd77aa72ebf84e2565
48 lines
874 B
C
48 lines
874 B
C
#define _SYSTEM 1
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#include <sys/cdefs.h>
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#include <lib.h>
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#include "namespace.h"
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#include <minix/rs.h>
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#include <lib.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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static int get_ipc_endpt(endpoint_t *pt)
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{
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return minix_rs_lookup("ipc", pt);
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}
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/* Shared memory control operation. */
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int shmctl(int shmid, int cmd, struct shmid_ds *buf)
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{
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message m;
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endpoint_t ipc_pt;
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int r;
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if (get_ipc_endpt(&ipc_pt) != OK) {
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errno = ENOSYS;
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return -1;
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}
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memset(&m, 0, sizeof(m));
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m.SHMCTL_ID = shmid;
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m.SHMCTL_CMD = cmd;
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m.SHMCTL_BUF = (long) buf;
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r = _syscall(ipc_pt, IPC_SHMCTL, &m);
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if ((cmd == IPC_INFO || cmd == SHM_INFO || cmd == SHM_STAT)
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&& (r == OK))
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return m.SHMCTL_RET;
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return r;
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}
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#if defined(__minix) && defined(__weak_alias)
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__weak_alias(shmctl, __shmctl50)
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#endif
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