Very Computer

I have a shell script (ksh) that sources some stuff then starts a
process.

The process is run in the foreground so it waits for the process to
complete. The problem I'm having is that if you send a kill -10 (BUS)
signal to the shell script process - the script and child both die
correctly.

However - If I send a kill -11 (SEGV) signal to the script pid then
the script dies but the child is left running.

Anyone know what the reason is for this?

Thanks,

Darrell

I just tried this and the child process didn't die.

tools:~#189% ./test.ksh &
[1] 10612
tools:~#191% ps t pts/8
   PID TT       S  TIME COMMAND
   487 pts/8    S  0:00 /bin/tcsh -i
 10612 pts/8    S  0:00 /bin/ksh ./test.ksh
 10613 pts/8    S  0:00 sleep 100
 10615 pts/8    O  0:00 ps t pts/8
tools:~#192% kill -BUS 10612
tools:~#193%
[1]    Bus error              ./test.ksh

tools:~#193% ps 10613
   PID TT       S  TIME COMMAND
 10613 pts/8    S  0:00 sleep 100
tools:~#195% cat test.ksh
#!/bin/ksh
sleep 100

I'm running Solaris 2.6 if it matters.

Quote:>However - If I send a kill -11 (SEGV) signal to the script pid then
>the script dies but the child is left running.

>Anyone know what the reason is for this?

I don't think there's any reason for *either* of them to kill the child
process.  Child processes are not normally killed when their parent
terminates; instead they're adopted by init (pid 1).  The only reason they
might be killed is if the parent has a handler for the signal, and that
handler causes it to kill its children.

If you instead send the signal to the process *group* rather than just the
parent process, it should kill both of them.  You send to a process group
by specifying the target as a negative number:

tools:~#197% ./test.ksh &
[1] 10624
tools:~#198% ps t pts/8
   PID TT       S  TIME COMMAND
   487 pts/8    R  0:00 /bin/tcsh -i
 10624 pts/8    S  0:00 /bin/ksh ./test.ksh
 10625 pts/8    S  0:00 sleep 100
 10626 pts/8    O  0:00 ps t pts/8
tools:~#199% kill -BUS -10624
tools:~#200%
[1]    Bus error              ./test.ksh

tools:~#200% ps 10625
   PID TT       S  TIME COMMAND

--

Genuity, Woburn, MA
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