V3/usr/man/man2/chmod.2

Find at most related files.
including files from this version of Unix. 
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NAME		chmod  --  change mode of file
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SYNOPSIS	sys chmod; name; mode  / chmod = 15.
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DESCRIPTION	The file whose name
is given as the null-terminated string pointed to by name____
has its mode changed to mode____.
Modes are constructed by or__ing together some
combination of the following:
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.in +3
 01 write, non-owner
 02 read, non-owner
 04 write, owner
 10 read, owner
 20 executable
 40 set user ID on execution
.in -3
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Only the owner of a file (or the super-user) may change the mode.
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SEE ALSO	chmod(I)
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DIAGNOSTICS	Error bit
(c-bit) set if name____ cannot be found or if current user
is neither the owner of the file nor the super-user.
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BUGS		--