From mboxrd@z Thu Jan  1 00:00:00 1970
To: 9fans@cse.psu.edu
Date: Wed,  2 Jan 2008 11:00:26 +0000
From: "smahapatra_ct@yahoo.com" <smahapatra_ct@yahoo.com>
Message-ID: <16287bc4-e635-4d1d-9ede-2f3f02c8e8ae@f52g2000hsa.googlegroups.com>
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Subject: [9fans] bungetc error
Topicbox-Message-UUID: 24e2b4cc-ead3-11e9-9d60-3106f5b1d025

I think after bgetc returns Beof, bungetc should change the state, but
not decrement bp->icount.

The correct code should be:

int
Bungetc(Biobufhdr *bp)
{
        if(bp->state != Bractive) {
                if (bp->state == Bracteof)
                         bp->state = Bractive;
                return Beof;
        }
	bp->icount--;
	return 1;
}

instead of the current code:

int
Bungetc(Biobufhdr *bp)
{

	if(bp->state == Bracteof)
		bp->state = Bractive;
	if(bp->state != Bractive)
		return Beof;
	bp->icount--;
	return 1;
}

Regards,
Saroj Mahapatra