Date: Wed, 15 Jun 2005 10:14:47 -0400 From: Ed Maste <emaste@phaedrus.sandvine.ca> To: freebsd-current@freebsd.org Subject: Re: savecore(8) increments /var/crash/bounds on each boot Message-ID: <20050615141447.GD95217@sandvine.com> In-Reply-To: <20050615023600.GA20721@dragon.NUXI.org> References: <20050613192308.GA87640@sandvine.com> <20050614082039.GA2038@dragon.NUXI.org> <20050614224704.Y75797@mp2.macomnet.net> <20050614190854.GA12928@dragon.NUXI.org> <20050614235132.L76669@mp2.macomnet.net> <20050615023600.GA20721@dragon.NUXI.org>
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[-- Attachment #1 --]
On Tue, Jun 14, 2005 at 07:36:00PM -0700, David O'Brien wrote:
> Do you understand the fix? How does lying in printheader() fix anything?
> Moving the call to getbounds() back to the original location is the "fix"
> but then it negates -vv. We shouldn't lie in printheader().
Fair enough, on dwhite's suggestion here's another try that splits the
increment-and-write out from getbounds() so that the bounds value can
be shown with -vv.
--
Ed Maste, Sandvine Incorporated
[-- Attachment #2 --]
--- savecore.c.orig 2005-06-13 16:19:41.000000000 -0400
+++ savecore.c 2005-06-15 09:41:52.000000000 -0400
@@ -145,35 +145,36 @@
if ((fp = fopen("bounds", "r")) == NULL) {
syslog(LOG_WARNING, "unable to open bounds file, using 0");
- goto newfile;
+ return (ret);
}
if (fgets(buf, sizeof buf, fp) == NULL) {
syslog(LOG_WARNING, "unable to read from bounds, using 0");
fclose(fp);
- goto newfile;
+ return (ret);
}
errno = 0;
ret = (int)strtol(buf, NULL, 10);
if (ret == 0 && (errno == EINVAL || errno == ERANGE))
syslog(LOG_WARNING, "invalid value found in bounds, using 0");
+ return (ret);
+}
-newfile:
+static void
+writebounds(int bounds) {
+ FILE *fp;
if ((fp = fopen("bounds", "w")) == NULL) {
syslog(LOG_WARNING, "unable to write to bounds file: %m");
- goto done;
+ return;
}
if (verbose)
- printf("bounds number: %d\n", ret);
+ printf("bounds number: %d\n", bounds);
- fprintf(fp, "%d\n", (ret + 1));
+ fprintf(fp, "%d\n", bounds);
fclose(fp);
-
-done:
- return (ret);
}
/*
@@ -373,6 +374,8 @@
goto closefd;
}
+ writebounds(bounds+1);
+
sprintf(buf, "info.%d", bounds);
/*
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