DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 555CoxrK1719827
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org DDDE93858C98
Date: Thu, 5 Jun 2025 14:49:37 +0200 (CEST)
To: Robert Fensterman <minnmass@gmail.com>
cc: cygwin@cygwin.com
Subject: Re: cygin 3.6.2-1 under Win11 24H2: Cannot launch: no available
 terminals
In-Reply-To: <0c47bb62-84e1-0828-7e03-c0e7b7583e11@gmx.de>
Message-ID: <cedfcad2-2b94-86af-1f91-b3a850c6c75d@gmx.de>
References: <CAL148o6i=r+G=cEQzs5e+KmMt07FxJHhMnoNnquhM0JJuyrwtA@mail.gmail.com>
 <145533698.20250528134347@yandex.ru>
 <CAL148o78xauJxEeF20g2JsH2od0EAskwAhb1K-s5P4gPZdTVZg@mail.gmail.com>
 <0c47bb62-84e1-0828-7e03-c0e7b7583e11@gmx.de>
MIME-Version: 1.0
UI-OutboundReport: notjunk:1;M01:P0:7EAPHTN4hBE=;Jk8Qc+EhrxiiFD6JXzWg+wplZJN
 5lnKvVadRAxqJLqxF99QIEUlzZLNq57j/Zr/kXYzPjlr4t7RYj/DlD/aoHWVMPk7vnxr2YV2m
 j63Tpjq8DRq9bNcT64ffG60HyQQYbuts+KcywLVxQmsmSpvIzZq5zfefE02BrYskH55OMNWAn
 00iEwmPgAV8bDrc4s6iDu3u1jO2hJHtun+9d0XU3sG8oOg+ZN6kFhV7mISgoCkXfiTP3y+EW1
 0A7G9gtCmnyFku2RfoPjaD0cVdLR7NfytF3LpajOUw5wWq/cJTaLVwJCFJ7pITLfi6bRY8x5m
 HFxwc1fKA6arD+dd4AECARBHSPBiPlTE2hY9SlN/f7Zxpp6cA9V0UyVvsOz1FOagZWquogiQS
 bVJtVdEX4LbtNjafuKYwRrsDwAG4+5nLdz/7IV3CQa/3Njm3NaMW6Im/smWhYbZuOnPHLp+OU
 UjbyEyecoU+Fm9wM9R2PUDw2RlOu3cyWTeWPz8PyAAo/tUdqRiGG89JBgHZ+FQ2y7jNBv+MUI
 Atvf6ulhsUqB4oEpZp6e3uppFiKSuW1NEu8pt+qwu5/dAg2bMLBhnbACXjuDlBtZpYlggzxBN
 VWydrb5DQNRf3WFUpG1Ms2XBnj1SjAY23w6Nw9e8AjYuODFIWTC00TV8aPDC3ZRJD8ZQKCa+L
 PCbNuc+jJFOyQvn6/RDd0bZIoq435Iz472ypF82tlFJEkFATeQif2HfKFfHgy2b6Oe+hUh58v
 TINHMrLwnp6LV0E1WpE/2h4w5OvEsYi9Nv51Seu/VD1pP81lC+wxCp7YAa+xbANJEpbZ3O/08
 /OX9SZlw5uYf3oimSXjPfc789TJHZ5XaReakwooCm/+YC7sAJK9RLIkX26d3vTiRJAAohe9yb
 lnBppcuvjV/cl1l3Z6FTTaS0jHme9u+9D6MtXtZ67uSSCUiGJo1UwFJdcgJDEl+UvODH7Z9vh
 gXFGWiF8jCeIiKXUiTMwmJCqd0br6UVRMRIYVHEt8a3U5mNmFh6LICPGssNQsYWxeBARs0FJb
 IhONx7FKAq+N0G9VQGb4lrkS9eYxNHJZlOkedHfa/7Lg6AVaDL9mF/jolP6ot2vPqz8NP75My
 +VcC3uxkyNW7ZMsC/ZvQBDWtcsWRbX5FUs4HdM+Xo/4qTK7QcJRkcz0B3UVhWiHTSbCtYc6jW
 5IJ1ekvJTPaoYhSSlDQ/RSVIlm4Gy4xN/KnPXGN33oVskCxTkjDO2UQk1AGViZtTqSZHGsXmD
 pXYjcgesL7jgM5VdVCEYW1ALD0TxcmNUOGvRMKJ1NKUtyDUEXRO6RjhXQXbAPpBm5+THN7phz
 w8wHKT2apQgvcn/7QjvIDhr+KOXt/SICpPpmWyP2RTYGRCThPNB/Z8/5RonrhHKRc1WV0mZZH
 WIoyh0XUzvYiADpiWUCWBvSaiDuvlK6/IdifMcTi76fZmbMiuUC6YZ4YH0VyrAx6deKeTg6At
 ahK/WY+c043t3etf2ZJ+kEzKoVpRP8zSiPuPnA+6vH0uDNaGtz8gbzlQSbnVKUb/6anMh2S20
 7mc+Es6P/jfFVEXNBdvjNg5qQnGpPLHsre1IiFgF/y8Z/yXms7Ca0v7gomp2bVcgdopVlU1uL
 sULMGkesORVefV+9Yz6XMKjKzGIZBOs31U7zjdoFrrISBgwfpwT9FiSn4ygMtt+rlguZiF8pO
 o4hYJo3QmPAgpSbxvBtcM4SiST0JCXh+PwoKrraiSeOn1VAhgwnXn6PL4aLP2Pv7/5TCAYbbI
 yKf8Fh2DgbLFLJY3SGlQgqUH3ne/bxtXbdviuvjtyhKb9lUebWwh5IrcJDpqV76BDUwBLMG3L
 4bLynGIIeDTFCQYW4smv2tlDYZc1b3rCVIhD/StCAa/jTNzIGmPCcwgGynaN6cdAfZEW6XjPI
 ToCH8g2wKrKIaeTdVLQSNx9ghO3PbIIflSCKO5hAyfwRhrzCTR8xxsggNQPBJa4yiD3pFyY9m
 vzQXX2OHBFssV6hSNHLmfFHJCYEL/PlahDIJK1fFUjcEwTDoT3B/+/cbbOKrqLmYcQ+43swWF
 nKYBO0lAopGRSkRXM/qE2e5dzxcx9YCYWRBV33a1ZVkqli91eN7QraM9uNHdQRfPMbD5pMzJV
 W/4VsYVsYpI6DR/2mD9wvrZuyxfQ4kMsRBp0ljpoLqn6lcCc4iuqLTDbOMKpVIlVtahs+4r3S
 YmRNwqUzisVOaG7vtauC2/ETViwEDPeKPJjIPr9jtgK7EfXR/zUitmMME6xK+/P9gD5uZHxy7
 0uw4eFgomY3aFKzuKzNkHr/B2EygXnRWPzKrhAHAnHs/vxQ48uIvq+2nICJuhA235UeOBF2tO
 OX6ThFkEZXFg44Ryw3igSBOAjMDMQKfGOjLOGeTkiPnIrysUAHp9gTHBbKpY8JLw/c3ZbC3Yn
 G/5ikYPaVFKH70AAtsntve95kOoBtHqX3MudE1jsBldaX6oZA3x/pA8AEIqjX50KmufiWuj+u
 0vszbqX2NeEaPptIXMQsGjU3mB7WuP6BwcehY6kAdZOUhm7PgB/G+zZoUiBDLxbuwS+5t2MyT
 Dwc15DVLlW/ZCN9GjBObVHl14Z+HlWHIzb6pAusrAz7Gh2XvM4BbPZ4JbhAha1ctUlFLdU27k
 I5bOedPblulz/YLGv559LTPsXZy0LJbdSY5Z3/vaVSBsb0Eg4r9kByFDTcRfvRQZJpCQeXktu
 M0y/MF6SyTt+gnONKXnUW6LUTg7M4fLAf9BJ1JohbROgwuG7WNJCiOb73hv5n5dq/u2Bo3WV/
 M1GyhC2yjdzucT773PXVZm9G/gVKTH5XMcXdNKS6lJPO+rVJiaRDFq2KkoiJClkRcaGCE2e7Z
 qj1NN0VSLJKeT0r72RsH34EpWjUcZJId0ibmsXSBOQd26T3ePqig+I9sb53j6twQEQfXHoXBt
 6r356m/Bj90Sa2da/KLkcJMmX4jk2bEHBnOSK4cQLK7xT7vgmMD83UCN3lIJusmRNzMyH67Ry
 jVgzGhUhXqZ6R0c6FlkZbQ39Awnzzyyj6y5duQamNbTOs5bqmVUZUeswbEhGnwwY2p1uQE5xy
 MfUtIXWrGXHVCpFzoX0BYWyROCKqvpuPcpj8naO3rCik8lOCC/nyxygNrVI3AdWF+8uTM1oMA
 TaTmwhWfApoL9/jZAoFXC2AzjX2mwWQg47qSDpSwKVl4XOAVnDjwj9Va5UrPQ3nplGXmm9M3T
 PxRp4ceCWnlqU6VA4cf3VviY5wtANp+MrauCAxggBxd/HA4F9jeCxxGYUwCtYIbt3xTWO1nVZ
 2BcsyoPJrJDmblQx7EPnpyJId6ATCIBUpDKjwWLHZvb25U4bs22i/Nxv8+u7UGLaNnXuuAkgy
 XYXPifixhkCclTC3BKEtqmdPxlYRSbzF91liFKqpRGrtYxxvQQ=
Precedence: list
From: Johannes Schindelin via Cygwin <cygwin@cygwin.com>
Reply-To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Content-Type: text/plain; charset="utf-8"
Errors-To: cygwin-bounces~archive-cygwin=delorie.com@cygwin.com
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie.com@cygwin.com>
Content-Transfer-Encoding: 8bit

Hi Robert,

this patch has now been released as Cygwin v3.6.3. Would you kindly verify
that it fixes your problem?

Thanks,
Johannes

On Mon, 2 Jun 2025, Johannes Schindelin wrote:

> Hi Robert,
> 
> On Wed, 28 May 2025, Robert Fensterman wrote:
> 
> > getent passwd %USERNAME%
> > is blank
> 
> I _think_ that you are running this in a Bash, therefore you'd need to run
> `getent passwd $USER`.
> 
> As it were, I did reproduce the issue on my end, and this command-line
> reports a SID that starts with `S-1-12-1`. Together with this information:
> 
> > With cygwin 3.6.2-1, I can start bash directly from a CMD window (though it
> > can't find programs, just built-ins).
> > Interestingly: after that test, that and reverting back to .1, my
> > .bash_history permissions seem to be wrong: instead of my AzureAD user as
> > the owner, Windows sees some other SID as owning the file and bash (in
> > cygwin) can't read it (eg., up-arrow doesn't go up past the start of the
> > instance of the shell, where it normally goes quite a bit further back in
> > time). As a workaround, I've given "everyone" rwx permissions, and it seems
> > to be working fine.
> 
> and bisecting my problem to
> https://github.com/cygwin/cygwin/commit/48e7d632689313106d16b0de035fb955c54492b2,
> the following diff (which partially reverts that commit) fixes it for me:
> 
> ```diff
> diff --git a/winsup/cygwin/uinfo.cc b/winsup/cygwin/uinfo.cc
> index 83883f9f65..795a00cc1a 100644
> --- a/winsup/cygwin/uinfo.cc
> +++ b/winsup/cygwin/uinfo.cc
> @@ -1996,10 +1996,12 @@ pwdgrp::fetch_account_from_windows (fetch_user_arg_t &arg, cyg_ldap *pldap)
>        if (sid_id_auth (sid) == 5 /* SECURITY_NT_AUTHORITY */
>  	  && sid_sub_auth (sid, 0) == SECURITY_APPPOOL_ID_BASE_RID)
>  	break;
> +#if 0
>        /* AzureAD SIDs */
>        if (sid_id_auth (sid) == 12 /* AzureAD ID */
>  	  && sid_sub_auth (sid, 0) == 1 /* Azure ID base RID */)
>  	break;
> +#endif
>        /* Samba user/group SIDs */
>        if (sid_id_auth (sid) == 22)
>  	break;
> ```
> 
> Now, the commit message of that commit includes the name of the reporter,
> which helped me find
> https://inbox.sourceware.org/cygwin/pbli6jecn5go2h7heebwivkwz6xf5h2stvq5fxna4u6pql6uht@7xpentpxjiak/
> as the original reason for that commit. That request only talked about
> `S-1-15-3-*`, though, and not about `S-1-12-1-*`. And the commit message
> makes it sound as if my SID would never resolve by `LookupAccountSid()`,
> but it clearly does.
> 
> So I am not quite sure what to make of this finding... Should the
> `S-1-12-1-*` part of 48e7d63268 (Cygwin: fetch_account_from_windows: skip
> LookupAccountSid for SIDs known to fail, 2025-04-10) simply be dropped? Or
> was there another clever idea to exploit a shortcut that would side-step
> the need to call `LookupAccountSid()` for those SIDs and set `ret = TRUE`?
> 
> Puzzled,
> Johannes
> 
> > 
> > On Wed, May 28, 2025 at 5:50 AM Andrey Repin <anrdaemon@yandex.ru> wrote:
> > 
> > > Greetings, Robert Fensterman!
> > >
> > > > When I try to launch Cygwin 3.6.2-1 - be it from the taskbar shortcut,
> > > > double-clicking on mintty.exe, or running mintty.exe from CMD - I get an
> > > > error message:
> > >
> > > >> Error: Could not fork child process: There are no available terminals
> > > (-1)
> > >
> > > > The resulting window is titled "-nologin".
> > >
> > > What's your /etc/shells and what is the output of `getent passwd
> > > %USERNAME%` ?
> > > Can you start bash.exe directly?
> > >
> > > > The taskbar shortcut is:
> > > >> C:\cygwin64\bin\mintty.exe -i /Cygwin-Terminal.ico -
> > >
> > > > I ran setup this morning to update whatever had updates; this included
> > > the
> > > > base cygwin package. As last week, it warned me that there was a point
> > > > update; I've since downloaded that and re-run setup (without reverting
> > > > anything; just letting it do its normal cleanup) to no avail. I've
> > > attached
> > > > the portion of setup.log with those two runs.
> > >
> > > > I did also update several other Windows apps Windows first thing this
> > > > morning, before I'd tried to open a Cygwin terminal; I don't recall that
> > > > list including anything that should have affected terminals, but I
> > > suppose
> > > > it's possible.
> > >
> > > > Google searches suggest killing several programs (ssh, ssh-agent, bash,
> > > sh,
> > > > git, node etc.); none are running. I have tried rebooting a couple of
> > > > times, launching Cygwin (from the taskbar shortcut) as soon as I can
> > > after
> > > > reboot, and I still get the error.
> > >
> > > > Other terminal-ey apps work: git-bash launches and appears to work
> > > > normally; similarly, CMD and PowerShell both seem to be just fine.
> > >
> > > > Reverting to v 3.6.1-1 seems to work: Cygwin launches and is acting
> > > > normally. Updating cygwin through the current version of setup results in
> > > > the same error condition (and, reverting a second time is still working).
> > >
> > > > Running on Win11 24H2 (OS Build 26100.4061).
> > >
> > >
> > >
> > > --
> > > With best regards,
> > > Andrey Repin
> > > Wednesday, May 28, 2025 13:20:56
> > >
> > > Sorry for my terrible english...
> > >
> > >
> > 
> > -- 
> > Robert F.
> > 

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple