SystemConfiguration.fproj/SCDNotifierInformViaFD.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*
  25  * Modification History
  26  *
  27  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  28  * - public API conversion
  29  *
  30  * April 5, 2000                Allan Nathanson <ajn@apple.com>
  31  * - initial revision
  32  */
  33
  34 #include <mach/mach.h>
  35 #include <mach/mach_error.h>
  36
  37 #include <SystemConfiguration/SystemConfiguration.h>
  38 #include <SystemConfiguration/SCPrivate.h>
  39 #include "SCDynamicStoreInternal.h"
  40 #include "config.h"             /* MiG generated file */
  41
  42 #include <paths.h>
  43 #include <unistd.h>
  44 #include <sys/types.h>
  45 #include <sys/socket.h>
  46 #include <sys/un.h>
  47
  48 Boolean
  49 SCDynamicStoreNotifyFileDescriptor(SCDynamicStoreRef    store,
  50                                    int32_t              identifier,
  51                                    int                  *fd)
  52 {
  53         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  54         kern_return_t                   status;
  55         int                             sc_status;
  56         struct sockaddr_un              un;
  57         int                             sock;
  58
  59         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("SCDynamicStoreNotifyFileDescriptor:"));
  60
  61         if (!store) {
  62                 /* sorry, you must provide a session */
  63                 _SCErrorSet(kSCStatusNoStoreSession);
  64                 return FALSE;
  65         }
  66
  67         if (storePrivate->server == MACH_PORT_NULL) {
  68                 /* sorry, you must have an open session to play */
  69                 _SCErrorSet(kSCStatusNoStoreServer);
  70                 return FALSE;
  71         }
  72
  73         if (storePrivate->notifyStatus != NotifierNotRegistered) {
  74                 /* sorry, you can only have one notification registered at once */
  75                 _SCErrorSet(kSCStatusNotifierActive);
  76                 return FALSE;
  77         }
  78
  79         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
  80                 _SCErrorSet(errno);
  81                 SCLog(_sc_verbose, LOG_NOTICE, CFSTR("socket: %s"), strerror(errno));
  82                 return FALSE;
  83         }
  84
  85         /* establish a UNIX domain socket for server->client notification */
  86         bzero(&un, sizeof(un));
  87         un.sun_family = AF_UNIX;
  88         snprintf(un.sun_path,
  89                  sizeof(un.sun_path)-1,
  90                  "%s%s-%d",
  91                  _PATH_VARTMP,
  92                  "SCDynamicStoreNotifyFileDescriptor",
  93                  storePrivate->server);
  94
  95         if (bind(sock, (struct sockaddr *)&un, sizeof(un)) == -1) {
  96                 _SCErrorSet(errno);
  97                 SCLog(_sc_verbose, LOG_NOTICE, CFSTR("bind: %s"), strerror(errno));
  98                 (void) close(sock);
  99                 return FALSE;
 100         }
 101
 102         if (listen(sock, 0) == -1) {
 103                 _SCErrorSet(errno);
 104                 SCLog(_sc_verbose, LOG_NOTICE, CFSTR("listen: %s"), strerror(errno));
 105                 (void) close(sock);
 106                 return FALSE;
 107         }
 108
 109         status = notifyviafd(storePrivate->server,
 110                              un.sun_path,
 111                              strlen(un.sun_path),
 112                              identifier,
 113                              (int *)&sc_status);
 114
 115         if (status != KERN_SUCCESS) {
 116                 if (status != MACH_SEND_INVALID_DEST)
 117                         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("notifyviafd(): %s"), mach_error_string(status));
 118                 (void) mach_port_destroy(mach_task_self(), storePrivate->server);
 119                 storePrivate->server = MACH_PORT_NULL;
 120                 _SCErrorSet(status);
 121                 return FALSE;
 122         }
 123
 124         *fd = accept(sock, 0, 0);
 125         if (*fd == -1) {
 126                 _SCErrorSet(errno);
 127                 SCLog(_sc_verbose, LOG_NOTICE, CFSTR("accept: %s"), strerror(errno));
 128                 (void) close(sock);
 129                 return FALSE;
 130         }
 131         (void) close(sock);
 132
 133         /* set notifier active */
 134         storePrivate->notifyStatus = Using_NotifierInformViaFD;
 135
 136         return TRUE;
 137 }