The default signal is already determined by the daemon, so the CLI should not send a signal. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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The docker kill subcommand kills one or more containers. The main process
inside the container is sent SIGKILL signal (default), or the signal that is
specified with the --signal option. You can reference a container by its
ID, ID-prefix, or name.
The --signal flag sets the system call signal that is sent to the container.
This signal can be a signal name in the format SIG<NAME>, for instance SIGINT,
or an unsigned number that matches a position in the kernel's syscall table,
for instance 2.
While the default (SIGKILL) signal will terminate the container, the signal
set through --signal may be non-terminal, depending on the container's main
process. For example, the SIGHUP signal in most cases will be non-terminal,
and the container will continue running after receiving the signal.
Note
ENTRYPOINTandCMDin the shell form run as a child process of/bin/sh -c, which does not pass signals. This means that the executable is not the container’s PID 1 and does not receive Unix signals.