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1972 Unix V2 "Beta" Resurrected

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414 points henry_flower | 2 comments | 19 Feb 25 21:41 UTC | HN request time: 0s | source
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JeffTickle ◴[20 Feb 25 12:39 UTC] No.43113995[source]▶
Can anyone provide a reference on what those file permissions mean? I can make a guess but when I searched around, could not find anything about unix v2 permissions. ls output looks so familiar, except for the sdrwrw!
replies(1): >>43114249 #
1. b0in ◴[20 Feb 25 13:15 UTC] No.43114249[source]▶
Someone in the mailing list thread linked the man pages that they were able to extract out

https://gitlab.com/segaloco/v1man/-/blob/master/man1/stat.1?...

for sdrwrw:

- column 1 is s or l meaning small or large

- column 2 is d, x, u, -; meaning directory, executable, setuid, or nothing.

- the rest are read-write bits for owner and non-owner.

replies(1): >>43120028 #
2. Postosuchus ◴[20 Feb 25 20:52 UTC] No.43120028[source]▶
Pretty interesting. I guess it was way later, when they came up with the SUID semantics and appropriated the first character for symlinks (l) or setuid binaries (s)...