Declares which signal is sent to the job.
The signal argument is either a signal name, e.g. SIGKILL, the signal name without the SIG prefix, e.g. KILL, or an unsigned signal number, e.g. 9. The signal name SIGNULL is allowed; the server will send the signal 0 to the job which will have no effect on the job, but will cause an obituary to be sent if the job is no longer executing. Not all signal names will be recognized by qsig. If it doesn't recognize the signal name, try issuing the signal number instead.
Two special signal names, "suspend" and "resume", are used to suspend and resume jobs. Cray systems use the Cray-specific suspend()/resume() calls.
On non-Cray system, suspend causes a SIGTSTP to be sent to all processes in the job's top task, wait 5 seconds, and then send a SIGSTOP to all processes in all tasks on all nodes in the job. This differs from TORQUE 2.0.0 which did not have the ability to propagate signals to sister nodes. Resume sends a SIGCONT to all processes in all tasks on all nodes.
When suspended, a job continues to occupy system resources but is not executing and is not charged for walltime. The job will be listed in the "S" state. Manager or operator privilege is required to suspend or resume a job.
Interactive jobs may not resume properly because the top-level shell will background the suspended child process.
