jobcntl.c is a program which job controls
job (source job.c). Change
the SRCDIR definition in jobctnl.c to suit.
Make sure you have a console window open so you can read the trace messages.
(On SUN's CDE use the workspace menu to open a console window; the window
should have name ``console'' not ``terminal''.)
sigmask.c shows how to mask a signal.
All the the signal demos use reliable signalling, not signal( ).
sigtmpfile.c shows how to remove a temporary file
prior to an interupt, and also shows
a library function that does something similar and is easier to use.
Nevertheless, the function is not always what you want.
sigmenu.c
shows how a siglongjmp can be used with signals to abort
from within some code. An editor might want to do something similar.