subyte man page on DigitalUNIX

subyte man page on DigitalUNIX

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subyte(9r)							    subyte(9r)

NAME
       subyte - General: Writes a byte into user address space

SYNOPSIS
       int subyte(
	       char *user_dest,
	       char byte );

ARGUMENTS
       Specifies  the  address in user space to write the byte.	 Specifies the
       byte to be written.

DESCRIPTION
       The subyte routine copies 1 byte	 from  the  protected  kernel  address
       space to the unprotected user address space.

RETURN VALUES
       Upon  successful completion, subyte returns the value 0 (zero).	Other‐
       wise, it returns a -1, indicating that the user	address	 specified  in
       user_dest could not be accessed.

SEE ALSO
       Routines:    copyout(9r),   copyoutstr(9r),   fubyte(9r),   fuword(9r),
       suword(9r)

								    subyte(9r)

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