.he 'FSTAT (II)'3/15/72'FSTAT (II)'
NAME fstat -- get status of open file
SYNOPSIS (file descriptor in r0)
sys fstat; buf / fstat = 28.
call is identical to stat
\b\b\b\b____, except that it operates
on open files instead of files given by name.
It is most often used to get the status
of the standard input and output files, whose names
DIAGNOSTICS The error bit
(c-bit) is set if the file descriptor is unknown.