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. - Jay From: Jay K Sent: Saturday, February 5, 2022 12:16 PM To: cygwin@cygwin.com <cygwin@cygwin.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 -- 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
