#242 NTFS file attribute letters in 7-zip
This is a support request and not a bug report.
I wonder if 7-zip developers (Igor Pavlov and others) are interested in updating the NTFS attributes letters in 7-zip UI?
Because I maintain this answer in Super User and ntfs_attr.sh shell script (gitlab.com), and I tried very hard in keeping the letters in sync with the (upstream) use in Windows Explorer and attrib.exe in Windows. I would like to share the information so that you can save time figuring out yourselves.
I've seen the "CPP/7zip/UI/Common/PropIDUtils.cpp" in the 7-zip source code, and it seems like the list is slightly out of date, so I propose these:
- FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS (0x400000) has been showing as letter 'M' in file explorer.
- FILE_ATTRIBUTE_STRICTLY_SEQUENTIAL seems to be defined as 0x20000000 in various sources on the Web (so your code comments look inaccurate). There are articles like this claiming that the "B", "SMR Blob attribute" in attrib.exe corresponds to this bit, but I cannot confirm it personally by myself.
This is the list of all attribute letters:
"RHSvDAxNTpLCOIEv.x.PU.M......b.."
Uppercase are the letters currently shown in File Explorer, and lowercase ones are either obsolete and unknown. And yes there are same letter assigned to two attributes.
(In ntfs_attr.sh I use a different list "rhsvdaxntplcoieV.X.PU.M......B.." as Unix/Linux systems favor using lowercase letters first.)
Looks like the p7zip project has been abandoned, and I reported the request to the wrong place.
Forwarded to here: https://sourceforge.net/p/sevenzip/bugs/2499/