SystemConfiguration.fproj/SCDNotifierInformViaFD.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  * April 5, 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 #include <paths.h>
  42 #include <unistd.h>
  43 #include <sys/types.h>
  44 #include <sys/socket.h>
  45 #include <sys/un.h>
  46
  47 Boolean
  48 SCDynamicStoreNotifyFileDescriptor(SCDynamicStoreRef    store,
  49                                    int32_t              identifier,
  50                                    int                  *fd)
  51 {
  52         SCDynamicStorePrivateRef        storePrivate = (SCDynamicStorePrivateRef)store;
  53         kern_return_t                   status;
  54         int                             sc_status;
  55         struct sockaddr_un              un;
  56         int                             sock;
  57
  58         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("SCDynamicStoreNotifyFileDescriptor:"));
  59
  60         if (!store) {
  61                 /* sorry, you must provide a session */
  62                 _SCErrorSet(kSCStatusNoStoreSession);
  63                 return FALSE;
  64         }
  65
  66         if (storePrivate->server == MACH_PORT_NULL) {
  67                 /* sorry, you must have an open session to play */
  68                 _SCErrorSet(kSCStatusNoStoreServer);
  69                 return FALSE;
  70         }
  71
  72         if (storePrivate->notifyStatus != NotifierNotRegistered) {
  73                 /* sorry, you can only have one notification registered at once */
  74                 _SCErrorSet(kSCStatusNotifierActive);
  75                 return FALSE;
  76         }
  77
  78         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
  79                 _SCErrorSet(errno);
  80                 SCLog(_sc_verbose, LOG_NOTICE, CFSTR("socket: %s"), strerror(errno));
  81                 return FALSE;
  82         }
  83
  84         /* establish a UNIX domain socket for server->client notification */
  85         bzero(&un, sizeof(un));
  86         un.sun_family = AF_UNIX;
  87         snprintf(un.sun_path,
  88                  sizeof(un.sun_path)-1,
  89                  "%s%s-%d",
  90                  _PATH_VARTMP,
  91                  "SCDynamicStoreNotifyFileDescriptor",
  92                  storePrivate->server);
  93
  94         if (bind(sock, (struct sockaddr *)&un, sizeof(un)) == -1) {
  95                 _SCErrorSet(errno);
  96                 SCLog(_sc_verbose, LOG_NOTICE, CFSTR("bind: %s"), strerror(errno));
  97                 (void) close(sock);
  98                 return FALSE;
  99         }
 100
 101         if (listen(sock, 0) == -1) {
 102                 _SCErrorSet(errno);
 103                 SCLog(_sc_verbose, LOG_NOTICE, CFSTR("listen: %s"), strerror(errno));
 104                 (void) close(sock);
 105                 return FALSE;
 106         }
 107
 108         status = notifyviafd(storePrivate->server,
 109                              un.sun_path,
 110                              strlen(un.sun_path),
 111                              identifier,
 112                              (int *)&sc_status);
 113
 114         if (status != KERN_SUCCESS) {
 115                 if (status != MACH_SEND_INVALID_DEST)
 116                         SCLog(_sc_verbose, LOG_DEBUG, CFSTR("notifyviafd(): %s"), mach_error_string(status));
 117                 (void) mach_port_destroy(mach_task_self(), storePrivate->server);
 118                 storePrivate->server = MACH_PORT_NULL;
 119                 _SCErrorSet(status);
 120                 return FALSE;
 121         }
 122
 123         *fd = accept(sock, 0, 0);
 124         if (*fd == -1) {
 125                 _SCErrorSet(errno);
 126                 SCLog(_sc_verbose, LOG_NOTICE, CFSTR("accept: %s"), strerror(errno));
 127                 (void) close(sock);
 128                 return FALSE;
 129         }
 130         (void) close(sock);
 131
 132         /* set notifier active */
 133         storePrivate->notifyStatus = Using_NotifierInformViaFD;
 134
 135         return TRUE;
 136 }