SystemConfiguration.fproj/helper/SCHelper_client.c

   1 /*
   2  * Copyright (c) 2005-2007 Apple 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 #include <fcntl.h>
  25 #include <paths.h>
  26 #include <signal.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <sys/param.h>
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #include <sys/un.h>
  35 #include <sys/wait.h>
  36
  37 #include <CoreFoundation/CoreFoundation.h>
  38 #include <SystemConfiguration/SCPrivate.h>
  39
  40 #include "SCHelper_client.h"
  41 #include "helper_comm.h"
  42
  43
  44 #define HELPER                                  "SCHelper"
  45 #define HELPER_LEN                              (sizeof(HELPER) - 1)
  46
  47 #define SUFFIX_SYM                              "~sym"
  48 #define SUFFIX_SYM_LEN                          (sizeof(SUFFIX_SYM) - 1)
  49
  50
  51 __private_extern__
  52 int
  53 _SCHelperOpen(CFDataRef authorizationData)
  54 {
  55         Boolean                 ok;
  56         int                     sock;
  57         struct sockaddr_un      sun;
  58         uint32_t                status  = 0;
  59         static int              yes     = 1;
  60
  61         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
  62                 perror("_SCHelperOpen socket() failed");
  63                 return -1;
  64         }
  65
  66         sun.sun_family = AF_UNIX;
  67         strlcpy(sun.sun_path, "/var/run/SCHelper", sizeof(sun.sun_path));
  68         if (connect(sock, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
  69                 perror("_SCHelperOpen connect() failed");
  70                 close(sock);
  71                 return -1;
  72         }
  73
  74         if (setsockopt(sock, SOL_SOCKET, SO_NOSIGPIPE, (const void *)&yes, sizeof(yes)) == -1) {
  75                 perror("_SCHelperOpen setsockopt() failed");
  76                 close(sock);
  77                 return -1;
  78         }
  79
  80         ok = _SCHelperExec(sock, SCHELPER_MSG_AUTH, authorizationData, &status, NULL);
  81         if (!ok) {
  82                 SCLog(TRUE, LOG_INFO, CFSTR("_SCHelperOpen: could not send authorization"));
  83                 close(sock);
  84                 return -1;
  85         }
  86
  87         ok = (status == 0);
  88         if (!ok) {
  89                 SCLog(TRUE, LOG_INFO, CFSTR("could not start \"" HELPER "\", status = %u"), status);
  90                 close(sock);
  91                 return -1;
  92         }
  93
  94         return sock;
  95 }
  96
  97
  98 __private_extern__
  99 void
 100 _SCHelperClose(int helper)
 101 {
 102         if (!_SCHelperExec(helper, SCHELPER_MSG_EXIT, NULL, NULL, NULL)) {
 103                 SCLog(TRUE, LOG_INFO, CFSTR("_SCHelperOpen: could not send exit request"));
 104         }
 105
 106         (void)close(helper);
 107         return;
 108 }