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the allow command now takes an optional uid argument for the user
to be granted temporary god status on the fileserver for maintenance.
this was kenji okomotos idea, so thanks :)
remove wstatallow and writeallow flags. instead, we have global:
int allowed;
that contains the uid of the currently allowed user id or -1
if permission checking is globally disabled for the fileserver.
when zero, normal permission checking takes place.
added int isallowed(File*) function that returns non-zero when the
context is the console, or the allowed user. this is also used internally
by iaccess(), so all the extra code of in the callers of iaccess()
is gone now.
dont conflate allowed user with noauth flag and auto-allow on ream.
the installer already knows about noauth and allow flags so theres no
problem with bootstraping.
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the malloc pool allocator is limited in its allocation
size. as almost all data structures in cwfs are never
freed, use brk() in ialloc() instead of mallocalign().
this means memory returned by ialloc() cannot be freed!
to make sure we do not call free by accident, remove
the #define malloc(n) ialloc(n, 0) macro and use ialloc()
directly as in the original code to show the intend
of permanent allocations.
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allow attach as none. (this was supposed to work but it
doesnt for 9p2000 because we have to check for
afid being NOFID instead of checking the uname string).
and add "nonone" flag to disable this.
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and nvram
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