thorpej
Tue Jul 28 19:07:19 PDT 1998
Update of /cvsroot/src/sys/kern
In directory nb00:/tmp/cvs-serv21768

Modified Files:
	uipc_syscalls.c 
Log Message:
When checking for overflow in the residual count, test against SSIZE_MAX.
The read/write system calls return ssize_t because -1 is used to indicate
error, therefore the transfer size MUST be limited to SSIZE_MAX, otherwise
garbage can be returned to the user.

There is NO change from existing behavior here, only a more precise
definition of that the semantics are, except in the Alpha case, where
the full SSIZE_MAX transfer size can now be realized (ssize_t is 64-bit
on the Alpha).