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| Date: | Mon, 7 Feb 2022 10:01:33 +0300 |
| From: | Andrey Repin <anrdaemon AT yandex DOT ru> |
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| To: | Jay K <jayk123 AT hotmail DOT com>, cygwin AT cygwin DOT com |
| Subject: | Re: Cygwin making files inaccessible? |
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Greetings, Jay K! > I looked at this a while. I tried various recent cygwin1.dlls as there were two ACL changes recently. > I tried building cygwin1.dll with those changes reverted, but failed to build it. > For one thing it took me a while to find shilka..it is in cocom, but that wasn't the entire problem. > Eventually.. I noticed the behavior was not the same for every > file/directory/volume. Sometimes it worked ok. > Though I think the ACLs still get changed quite a bit: "full" expands to "many". > Of course it has worked plenty for me and everyone else. > Eventually I tried chmod -R 777 * and this seems to have worked. > I speculate that some "bad" Cygwin ACLs got created at some point. > And maybe cacls wasn't deleting them?? That parts seems wierd. Maybe on directories? > Possibly due to those two recent changes, or maybe user error, I don't know. This may happen outside Cygwin tree, when initial ACL's are set in some interesting way. One possible solution is to tweak /cygdrive mount point to include "noacl" flag, deferring all ACL modifications to Windows. (Please bottom post in this list. Thank you.) > From: Jay K > Sent: Saturday, February 5, 2022 12:16 PM > To: cygwin AT cygwin DOT com <cygwin AT cygwin DOT com> > Subject: Cygwin making files inaccessible? > > Cygwin making files inaccessible? > i.e. when Cygwin copies or writes to them, not random files. > C:\t>dir /s/b/a > C:\t>dir /q . > 02/05/2022 04:11 AM <DIR> BUILTIN\Administrators . > 02/05/2022 04:11 AM <DIR> NT SERVICE\TrustedInsta.. > C:\t>cacls . > C:\t Everyone:(OI)(CI)F > C:\t>echo > 1.txt > C:\t>cacls 1.txt > C:\t\1.txt Everyone:F > C:\t>copy 1.txt 2.txt > 1 file(s) copied. > C:\t>cacls 2.txt > C:\t\2.txt Everyone:F > C:\t>del 2.txt > C:\t>uname -a > CYGWIN_NT-10.0-WOW DESKTOP-BCFUMJ4 3.3.4(0.341/5/3) 2022-01-31 19:31 i686 Cygwin > C:\t>cp 1.txt 2.txt > C:\t>which cp > /usr/bin/cp > C:\t>cacls 2.txt > C:\t\2.txt NULL SID:(DENY)(special access:) > READ_CONTROL > DESKTOP-BCFUMJ4\jay:(DENY)(special access:) > FILE_READ_DATA > FILE_READ_EA > FILE_EXECUTE > DESKTOP-BCFUMJ4\jay:(special access:) > STANDARD_RIGHTS_ALL > DELETE > READ_CONTROL > WRITE_DAC > WRITE_OWNER > SYNCHRONIZE > STANDARD_RIGHTS_REQUIRED > FILE_READ_ATTRIBUTES > FILE_WRITE_ATTRIBUTES > DESKTOP-BCFUMJ4\None:R > Everyone:R > C:\t>more 1.txt > ECHO is on. > C:\t>more 2.txt > Cannot access file C:\t\2.txt > Same behavior from cygwin64. > C:\t>\cygwin64\bin\uname -a > CYGWIN_NT-10.0 DESKTOP-BCFUMJ4 3.3.3(0.341/5/3) 2021-12-03 16:35 x86_64 Cygwin > Huh? > I would hope Cygwin could/would just copy the ACLs asis. > I am guessing there is some failed attempt to translate them > to an internal form and then back to NT form. > My real scenario was open/write/read, not cp.exe. > - Jay -- With best regards, Andrey Repin Monday, February 7, 2022 9:59:12 Sorry for my terrible english... -- 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
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