On Thursday 04 October 2007, Paul Eggert wrote: > However, the naive implementation of "chmod 755" had undesirable > effects in SunOS 4.x (late 1980s), an operating system that used the > setgid bit to switch between V7 and 4.2BSD semantics. That is because > "chmod 755" cleared the setgid bit on directories, which messes up > permissions of files that are later created in that directory, and > makes files harder to share. So in SunOS 4.x Sun changed "chmod 755 > dir" to leave the setgid bit alone.
ok, but this discussion is about 0755, not 755 ... can i extrapolate based on the "sharing" idea that SunOS treats 0755 and 755 the same for directories ? -mike
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