bootlog.tproj/bootlog.c

   1 /*
   2  * Copyright (c) 2006 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 OR NON-INFRINGEMENT.  Please see the
  18  * License for the specific language governing rights and limitations
  19  * under the License."
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <string.h>
  25 #include <sys/types.h>
  26 #include <sys/socket.h>
  27 #include <sys/sysctl.h>
  28 #include <sys/time.h>
  29 #include <sys/un.h>
  30 #include <fcntl.h>
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <utmpx.h>
  34
  35 #define _PATH_ASL_IN "/var/run/asl_input"
  36
  37 #define REPEAT  100
  38 #define SLEEP   2
  39
  40 static void
  41 asl_running(void)
  42 {
  43         int sock, i;
  44         struct sockaddr_un server;
  45         socklen_t len;
  46         int status;
  47
  48         sock = socket(AF_UNIX, SOCK_STREAM, 0);
  49         if (sock < 0)
  50                 exit(1);
  51
  52         memset(&server, 0, sizeof(struct sockaddr_un));
  53         server.sun_family = AF_UNIX;
  54
  55         strcpy(server.sun_path, _PATH_ASL_IN);
  56         server.sun_len = strlen(server.sun_path) + 1;
  57         len = sizeof(server.sun_len) + sizeof(server.sun_family) + server.sun_len;
  58
  59         i = REPEAT;
  60         for(;;) {
  61             status = connect(sock, (const struct sockaddr *)&server, len);
  62             if (status >= 0)
  63                 break;
  64             if(--i <= 0)
  65                 exit(1);
  66             sleep(SLEEP);
  67         }
  68
  69         close(sock);
  70 }
  71
  72 int
  73 main()
  74 {
  75     int mib[2] = {CTL_KERN, KERN_BOOTTIME};
  76     struct utmpx utx;
  77     size_t len;
  78
  79     bzero(&utx, sizeof(utx));
  80     utx.ut_type = BOOT_TIME;
  81     utx.ut_pid = 1; // on behave of launchd
  82
  83     /* get the boot time */
  84     len = sizeof(struct timeval);
  85     if(sysctl(mib, 2, &utx.ut_tv, &len, NULL, 0) < 0)
  86         gettimeofday(&utx.ut_tv, NULL); /* fallback to now */
  87
  88     /* wait for asl before logging */
  89     asl_running();
  90     pututxline(&utx);
  91     return 0;
  92 }