386BSD 0.1 development

[unix-history] / usr / src / usr.sbin / update / update.c

diff --git a/usr/src/usr.sbin/update/update.c b/usr/src/usr.sbin/update/update.c
index f389219..8d6ddda 100644 (file)
--- a/usr/src/usr.sbin/update/update.c
+++ b/usr/src/usr.sbin/update/update.c
@@ -1,37 +1,75 @@
-static char *sccsid = "@(#)update.c    4.1 (Berkeley) %G%";
-/*
- * Update the file system every 30 seconds.
- * For cache benefit, open certain system directories.
+/*-
+ * Copyright (c) 1987, 1990 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
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    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.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.

  */
 
  */
 

-#include <signal.h>
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1987, 1990 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)update.c   5.1 (Berkeley) 6/6/91";
+#endif /* not lint */

 
 

-char *fillst[] = {
-       "/bin",
-       "/usr",
-       "/usr/bin",
-       0,
-};
+#include <sys/time.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>

 
 main()
 {
 
 main()
 {

-       char **f;
-
-       if(fork())
-               exit(0);
-       close(0);
-       close(1);
-       close(2);
-       for(f = fillst; *f; f++)
-               open(*f, 0);
-       dosync();
-       for(;;)
-               pause();
+       struct itimerval value;
+       void mysync();
+
+       daemon(0, 0);
+
+       (void)signal(SIGALRM, mysync);
+
+       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);
+       }
+       for (;;)
+               sigpause(sigblock(0L));
+       /* NOTREACHED */

 }
 
 }
 

-dosync()
+void
+mysync()

 {
 {

-       sync();
-       signal(SIGALRM, dosync);
-       alarm(30);
+       (void)sync();

 }
 }