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Date: Tue, 16 Sep 1997 18:04:37 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199709160804.SAA24027@godzilla.zeta.org.au>
To: bde@zeta.org.au, j@uriah.heep.sax.de
Subject: Re: kern/4550
Cc: davidg@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG, ortmann@sparc.isl.net
Sender: owner-freebsd-bugs@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

>> >Synopsis: /proc/curproc/{mem,status} are 0 size
>> >...
>> >The size is intentionally 0.
>> 
>> The bug is that "regular" files are irregular.
>
>You mean, it should better display as:
>
>i-w-------  1 root  wheel                      ctl
>ir--r--r--  1 root  wheel                      etype

I mean, so that little things like stdio can work.

Bruce

>From fseek.c:

	/*
	 * Can only optimise if:
	 *	reading (and not reading-and-writing);
	 *	not unbuffered; and
	 *	this is a `regular' Unix file (and hence seekfn==__sseek).
[and regular files are actually regular]
	 * We must check __NBF first, because it is possible to have __NBF
	 * and __SOPT both set.
	 */
	if (fp->_bf._base == NULL)
		__smakebuf(fp);
	if (fp->_flags & (__SWR | __SRW | __SNBF | __SNPT))
		goto dumb;
	if ((fp->_flags & __SOPT) == 0) {
		if (seekfn != __sseek ||
		    fp->_file < 0 || fstat(fp->_file, &st) ||
		    (st.st_mode & S_IFMT) != S_IFREG) {
			fp->_flags |= __SNPT;
			goto dumb;
		}
		fp->_blksize = st.st_blksize;
		fp->_flags |= __SOPT;
	}