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fsck_ffs(8): fix divide by zero when debug messages are enabled

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Only print buffer cache debug message when a cache lookup has been done.

When running `fsck_ffs -d` on a gjournal'ed filesystem, it's possible
that totalreads is greater than zero when no cache lookup has been
done - causing a divide by zero. This commit fixes the following error:

    Floating point exception (core dumped)

Reviewed by:    mckusick
Differential Revision:  https://reviews.freebsd.org/D30370
This commit is contained in:
Robert Wing 2021-05-20 12:53:52 -08:00
parent cf74b2be53
commit 20123b25ee
1 changed files with 1 additions and 1 deletions
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2
sbin/fsck_ffs/fsutil.c
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@ -576,7 +576,7 @@ ckfini(int markclean)
rerun = 1;
}
}
if (debug && totalreads > 0)
if (debug && cachelookups > 0)
printf("cache with %d buffers missed %d of %d (%d%%)\n",
numbufs, cachereads, cachelookups,
(int)(cachereads * 100 / cachelookups));