Here's a job control conundrum for you.

[Ben Scott]

On 4/10/07, Bill Freeman <f at ke1g.mv.com> wrote:
> My man page says that, unlike kill, killall doesn't accept a
> negative first argument as a signal number (and even the kill
> man page doesn't interpretet -1 this way).

  I didn't know off the top of my head, so I checked:

$ cat

[1]+  Stopped                 cat
$ killall -1 cat
$ fg
cat
Hangup
$ killall --version
killall (psmisc) 21.3

-- Ben