Any previously scheduled alarm is canceled (only one alarm can
be scheduled at any time). The returned value is then the number of
seconds before any previously set alarm was to have been delivered.
- If \var{time} is zero, no alarm id scheduled, and any scheduled
+ If \var{time} is zero, no alarm is scheduled, and any scheduled
alarm is canceled. The return value is the number of seconds
remaining before a previously scheduled alarm. If the return value
is zero, no alarm is currently scheduled. (See the \UNIX{} man page