.pa 1
.he 'TTYN (III)'1/15/73'TTYN (III)'
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NAME		ttyn -- return name of current tty
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SYNOPSIS	jsr pc,ttyn
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DESCRIPTION	The routine hunts up the name of the
input tty attached to the process (one byte from the set
{012345678abc} at present) and returns it in r0.
.sp
"x" is returned if no genuine input tty is attached to the process.
.sp
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FILES		kept in /lib/liba.a
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SEE ALSO	fstat(II)
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DIAGNOSTICS	--
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BUGS		--
