SystemConfiguration.fproj/SCDNotifierInformViaSignal.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 /*
  24  * Modification History
  25  *
  26  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  27  * - public API conversion
  28  *
  29  * March 31, 2000               Allan Nathanson <ajn@apple.com>
  30  * - initial revision
  31  */
  32
  33 #include <mach/mach.h>
  34 #include <mach/mach_error.h>
  35
  36 #include <SystemConfiguration/SystemConfiguration.h>
  37 #include <SystemConfiguration/SCPrivate.h>
  38 #include "SCDynamicStoreInternal.h"
  39 #include "config.h"             /* MiG generated file */
  40
  41 Boolean
  42 SCDynamicStoreNotifySignal(SCDynamicStoreRef store, pid_t pid, int sig)
  43 {
  44         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  45         kern_return_t                   status;
  46         int                             sc_status;
  47         task_t                          task;
  48
  49         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("SCDynamicStoreNotifySignal:"));
  50         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("  pid = %d"), pid);
  51         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("  sig = %d"), sig);
  52
  53         if (!store) {
  54                 /* sorry, you must provide a session */
  55                 _SCErrorSet(kSCStatusNoStoreSession);
  56                 return FALSE;
  57         }
  58
  59         if (storePrivate->server == MACH_PORT_NULL) {
  60                 /* sorry, you must have an open session to play */
  61                 _SCErrorSet(kSCStatusNoStoreServer);
  62                 return FALSE;
  63         }
  64
  65         if (storePrivate->notifyStatus != NotifierNotRegistered) {
  66                 /* sorry, you can only have one notification registered at once */
  67                 _SCErrorSet(kSCStatusNotifierActive);
  68                 return FALSE;
  69         }
  70
  71         status = task_for_pid(mach_task_self(), pid, &task);
  72         if (status != KERN_SUCCESS) {
  73                 SCLog(_sc_verbose, LOG_DEBUG, CFSTR("task_for_pid(): %s"), mach_error_string(status));
  74                 _SCErrorSet(status);
  75                 return FALSE;
  76         }
  77
  78         status = notifyviasignal(storePrivate->server, task, sig, (int *)&sc_status);
  79
  80         if (status != KERN_SUCCESS) {
  81                 if (status != MACH_SEND_INVALID_DEST)
  82                         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("notifyviasignal(): %s"), mach_error_string(status));
  83                 (void) mach_port_destroy(mach_task_self(), storePrivate->server);
  84                 storePrivate->server = MACH_PORT_NULL;
  85                 _SCErrorSet(status);
  86                 return FALSE;
  87         }
  88
  89         /* set notifier active */
  90         storePrivate->notifyStatus = Using_NotifierInformViaSignal;
  91
  92         return TRUE;
  93 }