Re: [HACKERS] Postgres process invoking exit resulting in sh-QUIT core

On 2017-07-07 15:25:07 +0800, Craig Ringer wrote:
> Can't immediately explain the exit code, and SIGQUIT should _not_ generate a
> core file.

Yes, it should. The default action of SIGQUIT is to terminate the
process with a core file.

From signal(7):

| First the signals described in the original POSIX.1-1990 standard.
|
| Signal Value Action Comment
| ──────────────────────────────────────────────────────────────────────
| SIGHUP 1 Term Hangup detected on controlling terminal
| or death of controlling process
|
| SIGINT 2 Term Interrupt from keyboard
| SIGQUIT 3 Core Quit from keyboard
| SIGILL 4 Core Illegal Instruction
...

You can also easily test this by pressing Ctrl-\ in the shell while a
program is running:

% sleep 10
^\zsh: quit (core dumped) sleep 10
%

hp

--
_ | Peter J. Holzer | we build much bigger, better disasters now
|_|_) | | because we have much more sophisticated
| | | hjp(at)hjp(dot)at | management tools.
__/ | http://www.hjp.at/ | -- Ross Anderson <https://www.edge.org/>