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 #include <mach/mach.h>
  24 #include <mach/mach_error.h>
  25
  26 #include <SystemConfiguration/SCD.h>
  27 #include "config.h"             /* MiG generated file */
  28 #include "SCDPrivate.h"
  29
  30
  31 SCDStatus
  32 SCDNotifierInformViaSignal(SCDSessionRef session, pid_t pid, int sig)
  33 {
  34         SCDSessionPrivateRef    sessionPrivate = (SCDSessionPrivateRef)session;
  35
  36         kern_return_t   status;
  37         SCDStatus       scd_status;
  38         task_t          task;
  39
  40         SCDLog(LOG_DEBUG, CFSTR("SCDNotifierInformViaSignal:"));
  41         SCDLog(LOG_DEBUG, CFSTR("  pid = %d"), pid);
  42         SCDLog(LOG_DEBUG, CFSTR("  sig = %d"), sig);
  43
  44         if ((session == NULL) || (sessionPrivate->server == MACH_PORT_NULL)) {
  45                 return SCD_NOSESSION;   /* you must have an open session to play */
  46         }
  47
  48         if (SCDOptionGet(NULL, kSCDOptionIsServer)) {
  49                 /* sorry, neither the server nor any plug-ins can "wait" */
  50                 return SCD_FAILED;
  51         }
  52
  53         if (sessionPrivate->notifyStatus != NotifierNotRegistered) {
  54                 /* sorry, you can only have one notification registered at once */
  55                 return SCD_NOTIFIERACTIVE;
  56         }
  57
  58         if ((sig <= 0) || (sig > NSIG)) {
  59                 /* sorry, you must specify a valid signal */
  60                 return SCD_INVALIDARGUMENT;
  61         }
  62
  63         status = task_for_pid(mach_task_self(), pid, &task);
  64         if (status != KERN_SUCCESS) {
  65                 SCDLog(LOG_DEBUG, CFSTR("task_for_pid(): %s"), mach_error_string(status));
  66                 return SCD_FAILED;
  67         }
  68
  69         status = notifyviasignal(sessionPrivate->server, task, sig, (int *)&scd_status);
  70
  71         if (status != KERN_SUCCESS) {
  72                 if (status != MACH_SEND_INVALID_DEST)
  73                         SCDLog(LOG_DEBUG, CFSTR("notifyviasignal(): %s"), mach_error_string(status));
  74                 (void) mach_port_destroy(mach_task_self(), sessionPrivate->server);
  75                 sessionPrivate->server = MACH_PORT_NULL;
  76                 return SCD_NOSERVER;
  77         }
  78
  79         /* set notifier active */
  80         sessionPrivate->notifyStatus = Using_NotifierInformViaSignal;
  81
  82         return scd_status;
  83 }