system_cmds-336.tar.gz

[apple/system_cmds.git] / update.tproj / update.c

diff --git a/update.tproj/update.c b/update.tproj/update.c
index 980a7da11d0bc8d240d4a0ab73689fa1b946c75b..8e2638d06ae24c2c25f2b466b7c84d3a73ea11a6 100644 (file)
--- a/update.tproj/update.c
+++ b/update.tproj/update.c
@@ -23,7 +23,7 @@
  */
 /*-
  * Copyright (c) 1987, 1990, 1993
- *     The Regents of the University of California.  All rights reserved.
+ *     The Regents of the University of California.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -35,8 +35,8 @@
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
- *     This product includes software developed by the University of
- *     California, Berkeley and its contributors.
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
@@ -57,42 +57,95 @@
 #ifndef lint
 static char copyright[] =
 "@(#) Copyright (c) 1987, 1990, 1993\n\
-       The Regents of the University of California.  All rights reserved.\n";
+       The Regents of the University of California.  All rights reserved.\n";
 #endif /* not lint */
 
 #ifndef lint
-static char sccsid[] = "@(#)update.c   8.1 (Berkeley) 6/6/93";
+static char sccsid[] = "@(#)update.c   8.1 (Berkeley) 6/6/93";
 #endif /* not lint */
 
-#include <sys/time.h>
-#include <signal.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <getopt.h>
 
-main()
+#include "power_mgmt.h"
+#include "disk_power.h"
+
+extern char *optarg;
+
+static void usage(const char *argv0) __attribute__((noreturn));
+static int parsetime(const char *arg);
+
+int main(int argc, char *const argv[])
 {
-       struct itimerval value;
-       void mysync();
+       int normal_intr = 30;
+       int save_pwr_intr = 30;
+       int on_bat, disk_up, last_sync = 0, current_sync_interval = 0;
+
+       if (argc > 3)
+               usage(argv[0]);
+       if (argc > 2)
+               save_pwr_intr = parsetime(argv[2]);
+       if (argc > 1)
+               normal_intr = parsetime(argv[1]);
+
+       if (normal_intr == -1 || save_pwr_intr == -1)
+               usage(argv[0]);
+
+       if (normal_intr > save_pwr_intr)
+               normal_intr = save_pwr_intr;
 
        daemon(0, 0);
 
-       (void)signal(SIGALRM, mysync);
+       for (;;) {
+               if (last_sync >= current_sync_interval) {
+                       sync();
+                       last_sync = 0;
+               }
+               sleep(30);
+               last_sync += 30;
+
+               on_bat = on_battery_power();
+               disk_up = is_disk_awake();
+
+               current_sync_interval = normal_intr;
+               if (on_bat && !disk_up)
+                       current_sync_interval = save_pwr_intr;
+               
+       }
+
+}
+
+static int parsetime(const char *arg)
+{
+       char *q = NULL;
+       int r;
+
+       r = strtol(arg, &q, 10);
 
-       value.it_interval.tv_sec = 30;
-       value.it_interval.tv_usec = 0;
-       value.it_value = value.it_interval;
-       if (setitimer(ITIMER_REAL, &value, NULL)) {
-               perror("update: setitimer");
-               exit(1);
+       if (r < 1)
+               return -1;
+       if (arg == q)
+               return -1;
+
+       switch (*q) {
+       case 'h':
+               r *= 60;
+       case 'm':
+               r *= 60;
+       case 's':
+       case '\0':
+               break;
+       default:
+               return -1;
        }
-       for (;;)
-               sigpause(sigblock(0L));
-       /* NOTREACHED */
+
+       return r;
 }
 
-void
-mysync()
+static void usage(const char *argv0)
 {
-       (void)sync();
+       fprintf(stderr, "usage: %s [normal_interval [power_saving_interval]]\n", argv0);
+       exit(EXIT_FAILURE);
 }