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authorErik Andersen2000-03-04 21:19:32 +0000
committerErik Andersen2000-03-04 21:19:32 +0000
commit029011b9eeaf491d00fda1d072c4c6094df96c3a (patch)
tree7c49f1fc1547a2f9cee812472f422a5c1a5c448b /miscutils/update.c
parent7c4b2f3fe5cb6b9a5c6bd089c18279c5ce29dc21 (diff)
downloadbusybox-029011b9eeaf491d00fda1d072c4c6094df96c3a.zip
busybox-029011b9eeaf491d00fda1d072c4c6094df96c3a.tar.gz
A few updates (including the cp fix the Craig has been looking for)
-Erik
Diffstat (limited to 'miscutils/update.c')
-rw-r--r--miscutils/update.c86
1 files changed, 66 insertions, 20 deletions
diff --git a/miscutils/update.c b/miscutils/update.c
index fef188b..bb77c5f 100644
--- a/miscutils/update.c
+++ b/miscutils/update.c
@@ -1,9 +1,11 @@
/* vi: set sw=4 ts=4: */
/*
- * Mini update implementation for busybox
+ * Mini update implementation for busybox; much pasted from update-2.11
*
*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
+ * Copyright (c) 1996, 1997, 1999 Torsten Poulin.
+ * Copyright (c) 2000 by Karl M. Hegbloom <karlheg@debian.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -23,6 +25,8 @@
#include "internal.h"
#include <linux/unistd.h>
+#include <sys/param.h>
+#include <sys/syslog.h>
#if defined(__GLIBC__)
#include <sys/kdaemon.h>
@@ -30,37 +34,79 @@
_syscall2(int, bdflush, int, func, int, data);
#endif /* __GLIBC__ */
+static char update_usage[] =
+ "update [options]\n"
+ " -S\tforce use of sync(2) instead of flushing\n"
+ " -s SECS\tcall sync this often (default 30)\n"
+ " -f SECS\tflush some buffers this often (default 5)\n";
+
+static unsigned int sync_duration = 30;
+static unsigned int flush_duration = 5;
+static int use_sync = 0;
+
extern int update_main(int argc, char **argv)
{
- /*
- * Update is actually two daemons, bdflush and update.
- */
int pid;
+ while (**argv == '-') {
+ while (*++(*argv)) {
+ switch (**argv) {
+ case 'S':
+ use_sync = 1;
+ break;
+ case 's':
+ if (--argc < 1) usage(update_usage);
+ sync_duration = atoi(*(++argv));
+ break;
+ case 'f':
+ if (--argc < 1) usage(update_usage);
+ flush_duration = atoi(*(++argv));
+ break;
+ }
+ }
+ argc--;
+ argv++;
+ }
+
pid = fork();
if (pid < 0)
- return pid;
+ exit(FALSE);
else if (pid == 0) {
+ /* Become a proper daemon */
+ setsid();
+ chdir("/");
+ for (pid = 0; pid < OPEN_MAX; pid++) close(pid);
+
/*
* This is no longer necessary since 1.3.5x, but it will harmlessly
* exit if that is the case.
*/
- strcpy(argv[0], "bdflush (update)");
- argv[1] = 0;
- argv[2] = 0;
- bdflush(1, 0);
- _exit(0);
- }
- pid = fork();
- if (pid < 0)
- return pid;
- else if (pid == 0) {
- argv[0] = "update";
+ argv[0] = "bdflush (update)";
+ argv[1] = NULL;
+ argv[2] = NULL;
for (;;) {
- sync();
- sleep(30);
+ if (use_sync) {
+ sleep(sync_duration);
+ sync();
+ } else {
+ sleep(flush_duration);
+ if (bdflush(1, 0) < 0) {
+ openlog("update", LOG_CONS, LOG_DAEMON);
+ syslog(LOG_INFO,
+ "This kernel does not need update(8). Exiting.");
+ closelog();
+ exit(TRUE);
+ }
+ }
}
}
-
- return 0;
+ return TRUE;
}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/