Re: Any comments on users/7883 ?

[Peter Stephenson <pws@xxxxxxx>]

=?iso-8859-1?q?Oliver=20Kiddle?= wrote:
>  --- Peter Stephenson <pws@xxxxxxx> wrote: 
> 
> > The error message for 'command -v blub' is now `no such builtin: -v'.
> > Is that correct?  I don't see any documentation for the fact that the
> > -v argument isn't handled when posixbuiltins is set.
> 
> The POSIX specification for command -v says: "Otherwise, no output
> shall be written and the exit status shall reflect that the name was
> not found." So it shouldn't print an error message.

That's just because command -v wasn't recognised as a command with an
option.  It works properly when the shell gets that far.

> I would have thought that -v should be handled when posixbuiltins is
> set. It is only there because of POSIX to begin with.

I think this is the answer.  It may be just an oversight.  The second
hunk now doesn't get reached, but the change seems right anyway.

The test hn == (HashNode)&commandbn now gets an error message about
`dereferencing type-punned pointer', even though it's obviously never
dereferenced.

I still don't properly understand the logic here.

Index: Src/exec.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/exec.c,v
retrieving revision 1.70
diff -u -r1.70 exec.c
--- Src/exec.c	3 Sep 2004 09:47:49 -0000	1.70
+++ Src/exec.c	6 Sep 2004 13:15:17 -0000
@@ -1939,8 +1939,18 @@
 		return;
 	    }
 
+	    /*
+	     * Quit looking for a command
+	     * - if there was an error, or
+	     * - if we have checked that the hash entry is suitable, or
+	     * - if we are using the command prefix and either
+	     *   - we are not using POSIXBUILTINS, or
+	     *   - we have determined there are options which would
+	     *     require us to use the command builtin.
+	     */
 	    if (errflag || checked ||
-		(unset(POSIXBUILTINS) && (cflags & BINF_COMMAND)))
+		((cflags & BINF_COMMAND) &&
+		 (unset(POSIXBUILTINS) || hn == (HashNode)&commandbn)))
 		break;
 
 	    cmdarg = (char *) peekfirst(args);
@@ -1950,7 +1960,7 @@
 		break;
 	    }
 	    if (!(hn = builtintab->getnode(builtintab, cmdarg))) {
-		if (cflags & BINF_BUILTIN) {
+		if ((cflags & BINF_BUILTIN) || is_builtin) {
 		    zwarn("no such builtin: %s", cmdarg, 0);
 		    lastval = 1;
                     opts[AUTOCONTINUE] = oautocont;

-- 
Peter Stephenson <pws@xxxxxxx>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


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