update.tproj/update.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*-
  26  * Copyright (c) 1987, 1990, 1993
  27  *     The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *     This product includes software developed by the University of
  40  *     California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #ifndef lint
  59 static char copyright[] =
  60 "@(#) Copyright (c) 1987, 1990, 1993\n\
  61        The Regents of the University of California.  All rights reserved.\n";
  62 #endif /* not lint */
  63
  64 #ifndef lint
  65 static char sccsid[] = "@(#)update.c   8.1 (Berkeley) 6/6/93";
  66 #endif /* not lint */
  67
  68 #include <stdlib.h>
  69 #include <stdio.h>
  70 #include <unistd.h>
  71 #include <getopt.h>
  72
  73 #include "power_mgmt.h"
  74 #include "disk_power.h"
  75
  76 extern char *optarg;
  77
  78 static void usage(const char *argv0) __attribute__((noreturn));
  79 static int parsetime(const char *arg);
  80
  81 int main(int argc, char *const argv[])
  82 {
  83         int normal_intr = 30;
  84         int save_pwr_intr = 30;
  85         int on_bat, disk_up, last_sync = 0, current_sync_interval = 0;
  86
  87         if (argc > 3)
  88                 usage(argv[0]);
  89         if (argc > 2)
  90                 save_pwr_intr = parsetime(argv[2]);
  91         if (argc > 1)
  92                 normal_intr = parsetime(argv[1]);
  93
  94         if (normal_intr == -1 || save_pwr_intr == -1)
  95                 usage(argv[0]);
  96
  97         if (normal_intr > save_pwr_intr)
  98                 normal_intr = save_pwr_intr;
  99
 100         daemon(0, 0);
 101
 102         for (;;) {
 103                 if (last_sync >= current_sync_interval) {
 104                         sync();
 105                         last_sync = 0;
 106                 }
 107                 sleep(30);
 108                 last_sync += 30;
 109
 110                 on_bat = on_battery_power();
 111                 disk_up = is_disk_awake();
 112
 113                 current_sync_interval = normal_intr;
 114                 if (on_bat && !disk_up)
 115                         current_sync_interval = save_pwr_intr;
 116
 117         }
 118
 119 }
 120
 121 static int parsetime(const char *arg)
 122 {
 123         char *q = NULL;
 124         int r;
 125
 126         r = strtol(arg, &q, 10);
 127
 128         if (r < 1)
 129                 return -1;
 130         if (arg == q)
 131                 return -1;
 132
 133         switch (*q) {
 134         case 'h':
 135                 r *= 60;
 136         case 'm':
 137                 r *= 60;
 138         case 's':
 139         case '\0':
 140                 break;
 141         default:
 142                 return -1;
 143         }
 144
 145         return r;
 146 }
 147
 148 static void usage(const char *argv0)
 149 {
 150         fprintf(stderr, "usage: %s [normal_interval [power_saving_interval]]\n", argv0);
 151         exit(EXIT_FAILURE);
 152 }