On 2021-11-10 15:22, Ken Brown wrote:
On 11/10/2021 3:32 PM, corinna-cyg...@cygwin.com wrote:
From: Corinna Vinschen <cori...@vinschen.de>
As I told Takashi in PM, I will try to more often send patches to the
cygwin-patches ML before pushing them, so there's a chance to chime in.
LGTM.
This patch series is supposed to address the `rm -rf' problem reported
in https://cygwin.com/pipermail/cygwin/2021-November/249837.html
It was always frustrating, having to allow DOS drive letter paths for
backward compatibility. This here is another case of ambiguity,
triggered by the `isabspath' macro handling "X:" as absolute path, even
without the trailing slash or backslash.
Check out the 2nd patch for a more detailed description.
While at it, I wonder if we might have a chance to fix these ambiguities
in a better way. For instance, consider this:
$ mkdir -p test/c:
$ cd test
As non-admin:
$ touch c:/foo
touch: cannot touch 'c:/foo': Permission denied
As admin, even worse:
$ touch c:/foo
$ ls /cygdrive/c/foo
foo
As long as we support DOS paths as input, I have a hard time to see how
to fix this, but maybe we can at least minimize the ambiguity somehow.
I can't immediately think of anything. But is it really impossible to
phase out DOS path support over a period of time? We could start with a
HEADS-UP, asking for comments, then a deprecation announcement, then
something like the old dosfilewarning option, then a more forceful
warning that can't be turned off, and finally removal of support. This
could be done over a period of several years (not sure how many).
We could also put lines like
# C:/ on /c type ntfs (binary,posix=0)
into the default /etc/fstab.
NO! BTDT GTS.
Try getting help from any DOS/cmd type command or subcommand.
Shell expands /? to list of all mapped drives /c /d ... /s /v /y which
gives you a bunch of potentially destructive switches.
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in binary units and prefixes, physical quantities in SI.]
