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Fix rmt for use with Solaris 2.7 and others. The deal here is that for

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version 0 RMT protocol, the query of status makes no sense (send back, in
binary, the mtget structure), but systems sometimes use it anyway. And when
they use it, they get upset if they get back something that is a different
size from what they expect. The original mtget structure in BSD 4.3 is
24 bytes in size, and that seems to be what they can cope with.

The correct fix would be to go to Version 1 RMT, but that's a horse of
another color...
This commit is contained in:
mjacob 2000-02-08 18:00:05 +00:00
parent 2a2d421881
commit dcdf7ba2cd
1 changed files with 6 additions and 4 deletions
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10
usr.sbin/rmt/rmt.c
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@ -1,4 +1,4 @@
/* $NetBSD: rmt.c,v 1.9 1997/10/17 13:03:25 lukem Exp $ */
/* $NetBSD: rmt.c,v 1.10 2000/02/08 18:00:05 mjacob Exp $ */
/*
* Copyright (c) 1983, 1993
@ -43,7 +43,7 @@ __COPYRIGHT("@(#) Copyright (c) 1983, 1993\n\
#if 0
static char sccsid[] = "@(#)rmt.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: rmt.c,v 1.9 1997/10/17 13:03:25 lukem Exp $");
__RCSID("$NetBSD: rmt.c,v 1.10 2000/02/08 18:00:05 mjacob Exp $");
#endif
#endif /* not lint */
@ -189,10 +189,12 @@ top:
if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0)
goto ioerror;
rval = sizeof (mtget);
/* limit size to 'original' mtget size */
if (rval > 24)
rval = 24;
(void)sprintf(resp, "A%d\n", rval);
(void)write(STDOUT_FILENO, resp, strlen(resp));
(void)write(STDOUT_FILENO, (char *)&mtget,
sizeof (mtget));
(void)write(STDOUT_FILENO, (char *)&mtget, rval);
goto top;
}