SystemConfiguration.fproj/SCDNotifierInformViaSignal.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 /*
  27  * Modification History
  28  *
  29  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  30  * - public API conversion
  31  *
  32  * March 31, 2000               Allan Nathanson <ajn@apple.com>
  33  * - initial revision
  34  */
  35
  36 #include <mach/mach.h>
  37 #include <mach/mach_error.h>
  38
  39 #include <SystemConfiguration/SystemConfiguration.h>
  40 #include <SystemConfiguration/SCPrivate.h>
  41 #include "SCDynamicStoreInternal.h"
  42 #include "config.h"             /* MiG generated file */
  43
  44 Boolean
  45 SCDynamicStoreNotifySignal(SCDynamicStoreRef store, pid_t pid, int sig)
  46 {
  47         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  48         kern_return_t                   status;
  49         int                             sc_status;
  50         task_t                          task;
  51
  52         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("SCDynamicStoreNotifySignal:"));
  53         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("  pid = %d"), pid);
  54         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("  sig = %d"), sig);
  55
  56         if (!store) {
  57                 /* sorry, you must provide a session */
  58                 _SCErrorSet(kSCStatusNoStoreSession);
  59                 return FALSE;
  60         }
  61
  62         if (storePrivate->server == MACH_PORT_NULL) {
  63                 /* sorry, you must have an open session to play */
  64                 _SCErrorSet(kSCStatusNoStoreServer);
  65                 return FALSE;
  66         }
  67
  68         if (storePrivate->notifyStatus != NotifierNotRegistered) {
  69                 /* sorry, you can only have one notification registered at once */
  70                 _SCErrorSet(kSCStatusNotifierActive);
  71                 return FALSE;
  72         }
  73
  74         status = task_for_pid(mach_task_self(), pid, &task);
  75         if (status != KERN_SUCCESS) {
  76                 SCLog(_sc_verbose, LOG_DEBUG, CFSTR("task_for_pid(): %s"), mach_error_string(status));
  77                 _SCErrorSet(status);
  78                 return FALSE;
  79         }
  80
  81         status = notifyviasignal(storePrivate->server, task, sig, (int *)&sc_status);
  82
  83         if (status != KERN_SUCCESS) {
  84                 if (status != MACH_SEND_INVALID_DEST)
  85                         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("notifyviasignal(): %s"), mach_error_string(status));
  86                 (void) mach_port_destroy(mach_task_self(), storePrivate->server);
  87                 storePrivate->server = MACH_PORT_NULL;
  88                 _SCErrorSet(status);
  89                 return FALSE;
  90         }
  91
  92         /* set notifier active */
  93         storePrivate->notifyStatus = Using_NotifierInformViaSignal;
  94
  95         return TRUE;
  96 }