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by yuubi
3886 days ago
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The vax had 4 modes: kernel, executive, supervisor, user. I just read[0] that kernel and executive had implicit SETPRV privilege (and thus access to those modes would be tightly controlled because SETPRV allows bypassing all access controls); and I think I heard a while back that normal programs ran in user mode but the shell-equivalent ran in supervisor mode (and [1] sort of implies this). [0] http://h30266.www3.hp.com/odl/vax/opsys/vmsos73/vmsos73/5841... [1] "If you created the name with a DCL command, the access mode defaults to supervisor mode. If you created the name with a program, the access mode typically defaults to user mode." http://h71000.www7.hp.com/doc/731final/4477/4477pro_007.html |
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