Date: Thu, 6 Sep 2001 16:08:54 +0300 From: Ruslan Ermilov <ru@FreeBSD.org> To: Kris Kennaway <kris@obsecurity.org> Cc: hackers@FreeBSD.org Subject: Re: undocumented wall(1) feature Message-ID: <20010906160854.K18362@sunbay.com> In-Reply-To: <20010906030656.C2453@xor.obsecurity.org>; from kris@obsecurity.org on Thu, Sep 06, 2001 at 03:06:57AM -0700 References: <20010906030656.C2453@xor.obsecurity.org>
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On Thu, Sep 06, 2001 at 03:06:57AM -0700, Kris Kennaway wrote:
> Does anyone object to this?
>
Just a bit of history. This has been added with this CSRG
commit:
: D 4.5 81/06/12 13:23:15 root 5 4 00003/00001/00129
: MRs:
: COMMENTS:
: I suppressed wall messages to the sleeper program
Not sure what does it mean. Perhaps, at that times,
the sleeper existed as a user process and was run
under the sleeper user.
> Index: wall.c
> ===================================================================
> RCS file: /mnt/ncvs/src/usr.bin/wall/wall.c,v
> retrieving revision 1.19
> diff -u -r1.19 wall.c
> --- wall.c 2001/05/08 11:11:42 1.19
> +++ wall.c 2001/09/06 10:06:06
> @@ -71,8 +71,6 @@
> static void usage(void);
> char *ttymsg(struct iovec *, int, const char *, int);
>
> -#define IGNOREUSER "sleeper"
> -
> struct wallgroup {
> struct wallgroup *next;
> char *name;
> @@ -140,8 +138,7 @@
> iov.iov_len = mbufsize;
> /* NOSTRICT */
> while (fread((char *)&utmp, sizeof(utmp), 1, fp) == 1) {
> - if (!utmp.ut_name[0] ||
> - !strncmp(utmp.ut_name, IGNOREUSER, sizeof(utmp.ut_name)))
> + if (!utmp.ut_name[0])
> continue;
> if (grouplist) {
> strlcpy(username, utmp.ut_name, sizeof(utmp.ut_name));
--
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+380.652.512.251 Simferopol, Ukraine
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