On Tue, 14 Mar 2000, Cameron Simpson wrote:
> On Tue, Mar 14, 2000 at 03:13:23AM -0500, Eddie Strohmier wrote:
> | Thank you! After looking over the old script I see I was using kill -9. Not
> | a standard kill. I simply took out the -9 and yes it will allow the next
> | user to connect with a network connection on that killed modem connection.
> | Apparently I am killing off much more than needed with the kill -9 approach.
>
> A 9 signal prevents the receiving process from doing any kind of
> cleanup, since it may not be intercepted. As such, it should almost
> NEVER be the first signal you send a process you want to terminate.
> Instead, sent SIGTERM (15), which as it happens is the default signal
> the kill command sends. This lets the receiving process catch it, tidy
> up and _then_ exit.
i've always wondered about this, since i recall seeing some old
SCO UNIX scripts that explicitly caught signal 9 in the "trap"
statement at the top of the script. did this actually do anything?
rday
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