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Date: Mon, 16 Oct 1995 23:16:52 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199510161316.XAA28075@godzilla.zeta.org.au>
To: ache@astral.msk.su, bde@zeta.org.au, j@uriah.heep.sax.de
Subject: Re: A couple problems in FreeBSD 2.1.0-950922-SNAP
Cc: hackers@freefall.freebsd.org, kaleb@x.org
Sender: owner-hackers@FreeBSD.org
Precedence: bulk

>>programs in /bin and /sbin - grep shows "ctype.h" in only 25 out of 80
>>programs in /usr/src/[s]bin.

>It isn't accurate results. Many libc functions calls ctype
>indirecly, i.e. strtol, atoi, etc. You additionly need
>to grep ctype through libc and then grep function you got
>through bin/sbin. I suspect that 100% of programs use ctype
>for accurate results.

strtoul etc. assume the C locale, not to mention the ASCII collating
sequence for alpha characters.  From strtoul.c:

	register unsigned char c;
	...
		if (!isascii(c))
			break;
		if (isdigit(c))
			c -= '0';
		else if (isalpha(c))
			c -= isupper(c) ? 'A' - 10 : 'a' - 10;
			^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
		else
			break;
		if (c >= base)
			break;

The man page says that the base must be <= 36, but this isn't checked for.
The above would be less incorrect if it checked for c in the range
[a-z] or [A-Z].  Then it would only be assuming an ASCII collating sequence
and not the C locale.

>>[bloat]
>3) I don't see proper way to avoid it for statically compiled
>pgms, so I don't understand what we can discuss here. Yes
>it isn't very good. Alternatives?

Perhaps something can be done using linker tricks.  We need:

	if (ctype is really used (strtoul etc. don't count :-))
		link to current _startup_setlocale
	else
		link to dummy _startup_setlocale

Bruce