Hi Andrew and Corinna, Yep, something about FAT32 appears to be the problem. As Corinna correctly notes, permissions are faked on FAT32. Doesn't matter what chmod I run, it's all 644 or 755. Apparently, GNU screen does not like this, but apparently it also doesn't give any error message that that's the problem. Might be worth adding a few lines to the source to provide somewhat more diagnostic error messages re: when socket files cannot be found or opened?!?
At any rate, it works great now -- thanks!!! I set SCREENDIR=/cygdrive/c/tmp (an NTFS volume). Bingo, I can reattach. From same tty or different tty, whether console or remote. It's just like the old SCO Xenix days with Wyse 60 terminals -- woo-hoo! :) Only I'd take SCO Xenix over cmd.exe any day. :) Perhaps one for the FAQs...? Thanks again, Doug P.S., BTW, gotta love the Romans: we're just like 'em! :) :) On Tue, May 10, 2011 at 03:07:03PM -0400, Andrew Schulman wrote: > > 1. Output of 'cygcheck -svr' appended to the end of this message. > > Thanks, looks okay. > > > 2. I have the problem whether I run GNU screen from a cmd.exe prompt or > > under rxvt. I tried Peter Li's suggestion of trying to run screen under > > mintty -- still no joy. It does not matter if I running GNU screen from > > the console or if I'm logged in remotely, or if I try to detach and > > re-attach from the same tty or different ones. All efforts yield the > > same result: GNU screen cannot find anything to which to re-attach, even > > a session that I detached on the same tty just seconds before. > > > > 3. chmod 666 on the socket file did not work (its permissions were > > already 644, owned my 'morse', as shown in my original session long). > > No, I suggested that you try 0600, on the theory that your 0640 permissions > might be too permissive, and screen would refuse to use the socket. > Unlikely, but worth a try. > > However, if your socket is on a FAT file system, I don't know if you can > set 0600 permissions. > > > HOWEVER, I am wondering: my Cygin /tmp *IS* on a FAT32 filesystem, *NOT* > > an NTFS filesystem. Would that matter? Are socket files properly > > handled by Cygwin on FAT32? (I've never used a socket-based Cygwin > > program on this host before, at least not to my knowledge.) > > Hm, that could explain it. I don't recall this coming up before. > > Looking at screen(1), it says that sockets can go in "any mode 0700 > directory", and that you can set that in $SCREENDIR. So, I suggest trying > the following in order: > > (1) Run > > chmod 0700 /tmp/uscreens/S-morse > chmod 0600 /tmp/uscreens/S-morse/* > > then try to reattach. > > (2) If you can't set the above permissions because /tmp is on a FAT file > system, then find an NTFS directory and run > > export SCREENDIR=/path/to/ntfs/directory > > then start a new screen session, and see if you can reattach to it. > -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
