Re: 3.0.7(0.338/5/3): Possible reference to Developer's instances of dev files in deployed build

[Corinna Vinschen <corinna-cygwin@cygwin.com>]

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On Dec  7 21:03, Ken Brown wrote:
> I don't have any words of wisdom here, but I need to correct something I said 
> earlier.
> 
> On 12/4/2019 3:50 PM, Ken Brown wrote:
> > The assertion fails because 'Z:' doesn't contain a backslash.
> 
> This is not quite right.  It's true that path_conv::check strips the trailing 
> backslash from Z:\, but then it adds it back before calling symlink_info::check:
> 
>        /* If path is only a drivename, Windows interprets it as the
> 	 current working directory on this drive instead of the root
> 	 dir which is what we want. So we need the trailing backslash
> 	 in this case. */
>        if (full_path[0] && full_path[1] == ':' && full_path[2] == '\0')
> 	{
> 	  full_path[2] = '\\';
> 	  full_path[3] = '\0';
> 	}
> 
> Thus symlink_info::check is in fact called on Z:\, but the assertion fails 
> because the code at path.cc:2905 is looking for a backslash prior to the 
> trailing backslash.  So maybe the right fix for the assertion failure is the 
> following:
> 
> --- a/winsup/cygwin/path.cc
> +++ b/winsup/cygwin/path.cc
> @@ -2895,7 +2895,8 @@ restart:
>               slow down normal operation.  This extra check only kicks in if
>               we encountered a STATUS_OBJECT_NAME_NOT_FOUND *and* we didn't
>               already attach a suffix. */
> -         if (!restarted && !*ext_here && !(mount_flags & MOUNT_DOS))
> +         if (!restarted && !*ext_here && ext_here[-1] != '\\'
> +             && !(mount_flags & MOUNT_DOS))
>              {
>                /* Check for trailing dot or space or leading space in
>                   last component. */

Ok, please push that.  I'll create a snapshot so Wilfed can test this.


Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer

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