update.tproj/update.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*-
  25  * Copyright (c) 1987, 1990, 1993
  26  *     The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *     This product includes software developed by the University of
  39  *     California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #ifndef lint
  58 static char copyright[] =
  59 "@(#) Copyright (c) 1987, 1990, 1993\n\
  60        The Regents of the University of California.  All rights reserved.\n";
  61 #endif /* not lint */
  62
  63 #ifndef lint
  64 static char sccsid[] = "@(#)update.c   8.1 (Berkeley) 6/6/93";
  65 #endif /* not lint */
  66
  67 #include <stdlib.h>
  68 #include <stdio.h>
  69 #include <unistd.h>
  70 #include <getopt.h>
  71
  72 #include "power_mgmt.h"
  73 #include "disk_power.h"
  74
  75 extern char *optarg;
  76
  77 static void usage(const char *argv0) __attribute__((noreturn));
  78 static int parsetime(const char *arg);
  79
  80 int main(int argc, char *const argv[])
  81 {
  82         int normal_intr = 30;
  83         int save_pwr_intr = 30;
  84         int on_bat, disk_up, last_sync = 0, current_sync_interval = 0;
  85
  86         if (argc > 3)
  87                 usage(argv[0]);
  88         if (argc > 2)
  89                 save_pwr_intr = parsetime(argv[2]);
  90         if (argc > 1)
  91                 normal_intr = parsetime(argv[1]);
  92
  93         if (normal_intr == -1 || save_pwr_intr == -1)
  94                 usage(argv[0]);
  95
  96         if (normal_intr > save_pwr_intr)
  97                 normal_intr = save_pwr_intr;
  98
  99         daemon(0, 0);
 100
 101         for (;;) {
 102                 if (last_sync >= current_sync_interval) {
 103                         sync();
 104                         last_sync = 0;
 105                 }
 106                 sleep(30);
 107                 last_sync += 30;
 108
 109                 on_bat = on_battery_power();
 110                 disk_up = is_disk_awake();
 111
 112                 current_sync_interval = normal_intr;
 113                 if (on_bat && !disk_up)
 114                         current_sync_interval = save_pwr_intr;
 115
 116         }
 117
 118 }
 119
 120 static int parsetime(const char *arg)
 121 {
 122         char *q = NULL;
 123         int r;
 124
 125         r = strtol(arg, &q, 10);
 126
 127         if (r < 1)
 128                 return -1;
 129         if (arg == q)
 130                 return -1;
 131
 132         switch (*q) {
 133         case 'h':
 134                 r *= 60;
 135         case 'm':
 136                 r *= 60;
 137         case 's':
 138         case '\0':
 139                 break;
 140         default:
 141                 return -1;
 142         }
 143
 144         return r;
 145 }
 146
 147 static void usage(const char *argv0)
 148 {
 149         fprintf(stderr, "usage: %s [normal_interval [power_saving_interval]]\n", argv0);
 150         exit(EXIT_FAILURE);
 151 }