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/* msg.cc: XSI IPC interface for Cygwin.
Copyright 2003 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include "cygerrno.h"
#include <signal.h>
#ifdef USE_SERVER
#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include "sigproc.h"
#include "cygserver_ipc.h"
#include "cygserver_msg.h"
/*
* client_request_msg Constructors
*/
client_request_msg::client_request_msg (int msqid,
int cmd,
struct msqid_ds *buf)
: client_request (CYGSERVER_REQUEST_MSG, &_parameters, sizeof (_parameters))
{
_parameters.in.msgop = MSGOP_msgctl;
ipc_set_proc_info (_parameters.in.ipcblk);
_parameters.in.ctlargs.msqid = msqid;
_parameters.in.ctlargs.cmd = cmd;
_parameters.in.ctlargs.buf = buf;
msglen (sizeof (_parameters.in));
}
client_request_msg::client_request_msg (key_t key,
int msgflg)
: client_request (CYGSERVER_REQUEST_MSG, &_parameters, sizeof (_parameters))
{
_parameters.in.msgop = MSGOP_msgget;
ipc_set_proc_info (_parameters.in.ipcblk);
_parameters.in.getargs.key = key;
_parameters.in.getargs.msgflg = msgflg;
msglen (sizeof (_parameters.in));
}
client_request_msg::client_request_msg (int msqid,
void *msgp,
size_t msgsz,
long msgtyp,
int msgflg)
: client_request (CYGSERVER_REQUEST_MSG, &_parameters, sizeof (_parameters))
{
_parameters.in.msgop = MSGOP_msgrcv;
ipc_set_proc_info (_parameters.in.ipcblk);
_parameters.in.rcvargs.msqid = msqid;
_parameters.in.rcvargs.msgp = msgp;
_parameters.in.rcvargs.msgsz = msgsz;
_parameters.in.rcvargs.msgtyp = msgtyp;
_parameters.in.rcvargs.msgflg = msgflg;
msglen (sizeof (_parameters.in));
}
client_request_msg::client_request_msg (int msqid,
const void *msgp,
size_t msgsz,
int msgflg)
: client_request (CYGSERVER_REQUEST_MSG, &_parameters, sizeof (_parameters))
{
_parameters.in.msgop = MSGOP_msgsnd;
ipc_set_proc_info (_parameters.in.ipcblk);
_parameters.in.sndargs.msqid = msqid;
_parameters.in.sndargs.msgp = msgp;
_parameters.in.sndargs.msgsz = msgsz;
_parameters.in.sndargs.msgflg = msgflg;
msglen (sizeof (_parameters.in));
}
#endif /* USE_SERVER */
/*
* XSI message queue API. These are exported by the DLL.
*/
extern "C" int
msgctl (int msqid, int cmd, struct msqid_ds *buf)
{
#ifdef USE_SERVER
syscall_printf ("msgctl (msqid = %d, cmd = 0x%x, buf = %p)",
msqid, cmd, buf);
switch (cmd)
{
case IPC_STAT:
if (__check_null_invalid_struct_errno (buf, sizeof *buf))
return -1;
break;
case IPC_SET:
if (__check_invalid_read_ptr_errno (buf, sizeof *buf))
return -1;
break;
case IPC_RMID:
break;
case IPC_INFO:
/* msqid == 0: Request for msginfo struct. */
if (!msqid
&& __check_null_invalid_struct_errno (buf, sizeof (struct msginfo)))
return -1;
/* Otherwise, request msqid entries from internal msqid_ds array. */
if (msqid)
if (__check_null_invalid_struct_errno (buf, msqid * sizeof (struct msqid_ds)))
return -1;
break;
case MSG_INFO:
if (__check_null_invalid_struct_errno (buf, sizeof (struct msg_info)))
return -1;
break;
default:
syscall_printf ("-1 [%d] = msgctl ()", EINVAL);
set_errno (EINVAL);
return -1;
}
client_request_msg request (msqid, cmd, buf);
if (request.make_request () == -1 || request.retval () == -1)
{
syscall_printf ("-1 [%d] = msgctl ()", request.error_code ());
set_errno (request.error_code ());
if (request.error_code () == ENOSYS)
raise (SIGSYS);
return -1;
}
return request.retval ();
#else
set_errno (ENOSYS);
raise (SIGSYS);
return -1;
#endif
}
extern "C" int
msgget (key_t key, int msgflg)
{
#ifdef USE_SERVER
syscall_printf ("msgget (key = %U, msgflg = 0x%x)", key, msgflg);
client_request_msg request (key, msgflg);
if (request.make_request () == -1 || request.retval () == -1)
{
syscall_printf ("-1 [%d] = msgget ()", request.error_code ());
set_errno (request.error_code ());
if (request.error_code () == ENOSYS)
raise (SIGSYS);
return -1;
}
return request.retval ();
#else
set_errno (ENOSYS);
raise (SIGSYS);
return -1;
#endif
}
extern "C" ssize_t
msgrcv (int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg)
{
#ifdef USE_SERVER
syscall_printf ("msgrcv (msqid = %d, msgp = %p, msgsz = %d, "
"msgtyp = %d, msgflg = 0x%x)",
msqid, msgp, msgsz, msgtyp, msgflg);
if (__check_null_invalid_struct_errno (msgp, msgsz))
return -1;
client_request_msg request (msqid, msgp, msgsz, msgtyp, msgflg);
if (request.make_request () == -1 || request.rcvval () == -1)
{
syscall_printf ("-1 [%d] = msgrcv ()", request.error_code ());
set_errno (request.error_code ());
if (request.error_code () == ENOSYS)
raise (SIGSYS);
return -1;
}
return request.rcvval ();
#else
set_errno (ENOSYS);
raise (SIGSYS);
return -1;
#endif
}
extern "C" int
msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg)
{
#ifdef USE_SERVER
syscall_printf ("msgsnd (msqid = %d, msgp = %p, msgsz = %d, msgflg = 0x%x)",
msqid, msgp, msgsz, msgflg);
if (__check_invalid_read_ptr_errno (msgp, msgsz))
return -1;
client_request_msg request (msqid, msgp, msgsz, msgflg);
if (request.make_request () == -1 || request.retval () == -1)
{
syscall_printf ("-1 [%d] = msgsnd ()", request.error_code ());
set_errno (request.error_code ());
if (request.error_code () == ENOSYS)
raise (SIGSYS);
return -1;
}
return request.retval ();
#else
set_errno (ENOSYS);
raise (SIGSYS);
return -1;
#endif
}
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