[PATCH] Cygwin: console: Make the console accessible from other terminals.

[Takashi Yano]

On Wed, 21 Dec 2022 13:56:25 +0100
Corinna Vinschen wrote:
> However, there's something broken with these patches in terms of
> debugging:
> 
> With current origin/master:
> 
>   $ ls -l  /dev/cons0
>   crw-rw-rw- 4 corinna vinschen 3, 0 Dec 21 13:46 /dev/cons0
>   $ strace -o xxx /bin/ls /dev/cons0
>   /dev/cons0
> 
> After applying "pinfo: Align CTTY behavior to the statement of POSIX."
> 
>   $ ls -l /dev/cons0
>   crw-rw-rw- 4 corinna vinschen 3, 0 Dec 21 13:51 /dev/cons0
>   $ strace -o xxx /bin/ls /dev/cons0
>   /usr/bin/ls: cannot access '/dev/cons0': No such device or address
> 
> "devices: Make generic console devices invisible from pty." doesn't
> change this, but after applying "console: Make the console accessible
> from other terminals.":
> 
>   $ ls -l /dev/cons0
>   crw------- 4 corinna vinschen 3, 0 Dec 21 13:55 /dev/cons0
>   $ strace -o xxx /bin/ls /dev/cons0
>    670400 [main] ls 1630 C:\cygwin64\bin\ls.exe: *** fatal error - MapViewOfFileEx '(null)'(0x54), Win32 error 487.  Terminating.
>    674526 [main] ls 1630 cygwin_exception::open_stackdumpfile: Dumping stack trace to ls.exe.stackdump
> 
> FWIW:
> 
>   $ strace -o xxx /bin/ls
>    673796 [main] ls 1633 C:\cygwin64\bin\ls.exe: *** fatal error - MapViewOfFileEx '(null)'(0x54), Win32 error 487.  Terminating.
>    676814 [main] ls 1633 cygwin_exception::open_stackdumpfile: Dumping stack trace to ls.exe.stackdump

Thank you for finding this. I think this can be easily fixed.
Please see v3 patch.

[PATCH v3] Cygwin: pinfo: Align CTTY behavior to the statement of POSIX.

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>