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         if (store == NULL) {
  60                 /* sorry, you must provide a session */
  61                 _SCErrorSet(kSCStatusNoStoreSession);
  62                 return FALSE;
  63         }
  64
  65         if (storePrivate->server == MACH_PORT_NULL) {
  66                 /* sorry, you must have an open session to play */
  67                 _SCErrorSet(kSCStatusNoStoreServer);
  68                 return FALSE;
  69         }
  70
  71         if (storePrivate->notifyStatus != NotifierNotRegistered) {
  72                 /* sorry, you can only have one notification registered at once */
  73                 _SCErrorSet(kSCStatusNotifierActive);
  74                 return FALSE;
  75         }
  76
  77         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
  78                 _SCErrorSet(errno);
  79                 SCLog(TRUE, LOG_NOTICE, CFSTR("SCDynamicStoreNotifyFileDescriptor socket(): %s"), strerror(errno));
  80                 return FALSE;
  81         }
  82
  83         /* establish a UNIX domain socket for server->client notification */
  84         bzero(&un, sizeof(un));
  85         un.sun_family = AF_UNIX;
  86         snprintf(un.sun_path,
  87                  sizeof(un.sun_path)-1,
  88                  "%s%s-%d",
  89                  _PATH_VARTMP,
  90                  "SCDynamicStoreNotifyFileDescriptor",
  91                  storePrivate->server);
  92
  93         if (bind(sock, (struct sockaddr *)&un, sizeof(un)) == -1) {
  94                 _SCErrorSet(errno);
  95                 SCLog(TRUE, LOG_NOTICE, CFSTR("SCDynamicStoreNotifyFileDescriptor bind(): %s"), strerror(errno));
  96                 (void) close(sock);
  97                 return FALSE;
  98         }
  99
 100         if (listen(sock, 0) == -1) {
 101                 _SCErrorSet(errno);
 102                 SCLog(TRUE, LOG_NOTICE, CFSTR("SCDynamicStoreNotifyFileDescriptor listen(): %s"), strerror(errno));
 103                 (void) close(sock);
 104                 return FALSE;
 105         }
 106
 107         status = notifyviafd(storePrivate->server,
 108                              un.sun_path,
 109                              strlen(un.sun_path),
 110                              identifier,
 111                              (int *)&sc_status);
 112
 113         if (status != KERN_SUCCESS) {
 114 #ifdef  DEBUG
 115                 if (status != MACH_SEND_INVALID_DEST)
 116                         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("SCDynamicStoreNotifyFileDescriptor notifyviafd(): %s"), mach_error_string(status));
 117 #endif  /* DEBUG */
 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(TRUE, LOG_NOTICE, CFSTR("SCDynamicStoreNotifyFileDescriptor 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 }