Signal, ver. 0.7 Alpha
(copyleft) Chuck Geigner, 2001

The kill command is used to kill jobs using their PID and a signal
(SIGHUP, SIGKILL, etc). This is useful when one knows the PID.
But what if you wanted to signal all jobs belonging to user foobar?
What if you wanted to kill all programs by name? This usually
requires one to use the ps command to get a listing of those
processes in order to figure out their PIDs, ownership, what they
are named, etc. The signal utility attempts to fill in this need.

Usage: signal -[type] -[c|o|p|u|x] [name] {name} {-q} OR signal [-v|-h]

signal by PID (normal)                           -p --pid
signal by command name (CMD)                     -c --cmd
signal by username                               -u --user
combine 2 and 4a                                 -o --cmdby
option 9 except leave newest proc alone          -x --exceptnewest
no user interaction req (for scripted use)       -q --quiet
print the version of signal                      -v --version
print out a helpful message                      -h --help

Do NOT use this utility on ps, grep, or sed processes. Since I use these
heavily in processing the data, if one "signal'd" any of these, the
program would behave unpredictably. Mainly, this was created to be run as
"root" and to send signals to daemons, services, processes with children,
processes that spawn other processes, that sort of thing - ctg


Examples:
To get some basic info about signal:
  # signal -v

To get some help with signal:
  # signal --help

To kill a process with a PID of 12345:
  # signal -KILL -p 12345

To send SIGHUP to all httpd processes:
  # signal 1 --cmd httpd

To nuke all processes owned by username "sgenung":
  # signal -9 -u sgenung

To kill all commands named "vi" owned by user "sgenung":
  # signal KILL --cmdby vi sgenung

To send HUP to all processes named "mwm" owned by user "print01" except
the newest process:
  # signal -1 -x mwm print01

To send SIGKILL to all processes owned by user "sagenung" with no prompting:
  # signal KILL --user sagenung -q