1 /* msg.cc: Single unix specification IPC interface for Cygwin.
3 Copyright 2003, 2004 Red Hat, Inc.
5 This file is part of Cygwin.
7 This software is a copyrighted work licensed under the terms of the
8 Cygwin license. Please consult the file "CYGWIN_LICENSE" for
11 #ifdef __OUTSIDE_CYGWIN__
21 #include "cygserver.h"
23 #include "transport.h"
25 #include "cygserver_ipc.h"
26 #include "cygserver_msg.h"
28 client_request_msg::client_request_msg ()
29 : client_request (CYGSERVER_REQUEST_MSG,
30 &_parameters, sizeof (_parameters))
35 client_request_msg::serve (transport_layer_base *const conn,
36 process_cache *const cache)
38 if (msglen () != sizeof (_parameters.in))
40 syscall_printf ("bad request body length: expecting %lu bytes, got %lu",
41 sizeof (_parameters), msglen ());
46 if (support_msgqueues == TUN_FALSE)
48 syscall_printf ("Message queue support not started");
50 if (_parameters.in.msgop == MSGOP_msgrcv)
51 _parameters.out.rcv = -1;
53 _parameters.out.ret = -1;
54 msglen (sizeof (_parameters.out));
57 process *const client = cache->process (_parameters.in.ipcblk.cygpid,
58 _parameters.in.ipcblk.winpid,
59 _parameters.in.ipcblk.signal_arrived);
66 if (!conn->impersonate_client ())
73 if (!adjust_identity_info (&_parameters.in.ipcblk))
76 conn->revert_to_self ();
81 /* Early revert_to_self since IPC code runs in kernel mode. */
82 conn->revert_to_self ();
83 /* sysv_msg.cc takes care of itself. */
85 thread td = { client, &_parameters.in.ipcblk, {-1, -1} };
87 msgop_t msgop = _parameters.in.msgop; /* Get's overwritten otherwise. */
91 res = msgctl (&td, &_parameters.in.ctlargs);
94 res = msgget (&td, &_parameters.in.getargs);
97 res = msgrcv (&td, &_parameters.in.rcvargs);
100 res = msgsnd (&td, &_parameters.in.sndargs);
104 td.td_retval[0] = -1;
107 /* Allocated by the call to adjust_identity_info(). */
108 if (_parameters.in.ipcblk.gidlist)
109 free (_parameters.in.ipcblk.gidlist);
111 if (msgop == MSGOP_msgrcv)
112 _parameters.out.rcv = td.td_retval[0];
114 _parameters.out.ret = td.td_retval[0];
115 msglen (sizeof (_parameters.out));
117 #endif /* __OUTSIDE_CYGWIN__ */