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Subject: Re: cleanup of in-use files moved to recycle bin
To: Jeremy Drake <cygwin AT jdrake DOT com>
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Is the format of /proc/mounts changing from being space delimited to being
null delimited?
where can I read more about this change?

On Sun, Mar 2, 2025 at 10:57 PM Jeremy Drake via Cygwin <cygwin AT cygwin DOT com>
wrote:

> On Sun, 2 Mar 2025, Jeremy Drake via Cygwin wrote:
>
> > > 2) assuming there is not, I want to make a script using only things
> > > present in a "base system" to clean them up.
> >
> > Now that the mount points are escaped and contain the Windows volume
> roots
> > starting with 3.6, here's my script.  It uses bash/find/gawk.  I'd
> welcome
> > any ideas on improving it, I've only just started messing with gawk.
> (I'd
> > started out doing grep/cut then xargs printf "%b\0" to unescape, but with
> > gawk I can do that all in one program).
> >
> > It's in
> > https://gist.github.com/jeremyd2019/4984ff0fa1f6fd8c99d7b8b244c52088
>
> I decided to try the grep/cut/xargs/printf method again, and found it
> shorter, so here it is.  I also set up LC_CTYPE and LC_COLLATE to C.UTF-8
> up front, in case some other locale/encoding is set up.  I still have to
> override this to C for the find, because it doesn't seem to like the
> invalid unicode used by older Cygwin/MSYS2 versions for the binned files.
>
> #!/bin/bash -ex
>
> export LC_CTYPE=C.UTF-8 LC_COLLATE=C.UTF-8
>
> IFS=. read -r cygmajor cygminor _ < <(uname -r)
>
> declare -a roots
>
> if [ "${cygmajor}" -gt 3 -o "${cygmajor}" -eq 3 -a "${cygminor}" -ge 6 ];
> then
>   # as of cygwin 3.6, volume roots are parsable from /proc/mounts
>   # (noumount is the option that indicates a cygdrive mount)
>   readarray -t -d $'\0' roots < <(
>     cut -d' ' -f2,4 /proc/mounts | grep '\<noumount\>[^ ]*$' |
>     cut -d' ' -f1 | xargs -d'\n' printf '%b\0')
> else
>   # before that, just punt and look at the root of the drive / is mounted
> on
>   root="$(cygpath -w /)"
>   roots=("$(cygpath -u "${root:0:2}")")
>   unset root
> fi
>
> declare -a trash
> readarray -t -d $'\0' trash < <(
>   LC_CTYPE=C LC_COLLATE=C \
>   find "${roots[@]}" -maxdepth 1 -iname '$Recycle.Bin' -print0 |
>   LC_CTYPE=C LC_COLLATE=C \
>   find -files0-from - -maxdepth 2 \( -name $'.\uDC6D\uDC73\uDC79\uDC73*'
> -o \
>                                      -name $'.\uF76D\uF773\uF779\uF773*'
> -o \
>                                      -name '.msys*' -o \
>                                      -name $'.\uDC63\uDC79\uDC67*' -o \
>                                      -name $'.\uF763\uF779\uF767*' -o \
>                                      -name '.cyg*' \) -print0)
> if (( ${#trash[@]} )); then
>   ls -la "${trash[@]}"
>   read -r -p "Remove? (y/N) "
>
>   if [[ "${REPLY^^}" == "Y" ]]; then
>     rm -f "${trash[@]}"
>   fi
> fi
>
> --
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