tree c7908cf7ea05af2af22729fe6094d6784685ded3
parent 9366089a491a867f912338660ae836212c055876
author Patrick Rudolph <patrick.rudolph@9elements.com> 1697193298 +0200
committer Josh Lehan <krellan@google.com> 1707782778 +0000

main: Gracefully handle SIGTERM

When systemd stops phosphor-pid-control.service it sends a SIGTERM.
Catch SIGTERM in the existing boost signal handler and stop the all
control loops to make sure the destructor is called in each of them.

This functionality will be used in the following commit.

Tested: systemctl stop phosphor-pid-control.service and see dtor
        being invoked before process terminates.

Change-Id: I5b1fe8f9191d703351b96e7ae19348f7ccab03d4
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>