[27.x backport] docs/reference: stop, restart: add flag descriptions

docs/reference/commandline/container_restart.md

@@ -9,10 +9,10 @@ Restart one or more containers
 
 ### Options
 
-| Name             | Type     | Default | Description                                  |
-|:-----------------|:---------|:--------|:---------------------------------------------|
-| `-s`, `--signal` | `string` |         | Signal to send to the container              |
-| `-t`, `--time`   | `int`    | `0`     | Seconds to wait before killing the container |
+| Name                                   | Type     | Default | Description                                  |
+|:---------------------------------------|:---------|:--------|:---------------------------------------------|
+| [`-s`](#signal), [`--signal`](#signal) | `string` |         | Signal to send to the container              |
+| [`-t`](#time), [`--time`](#time)       | `int`    | `0`     | Seconds to wait before killing the container |
 
 
 <!---MARKER_GEN_END-->
@@ -22,3 +22,34 @@ Restart one or more containers
 ```console
 $ docker restart my_container
 ```
+
+
+### <a name="signal"></a> Stop container with signal (-s, --signal)
+
+The `--signal` flag sends the system call signal to the container to exit.
+This signal can be a signal name in the format `SIG<NAME>`, for instance
+`SIGKILL`, or an unsigned number that matches a position in the kernel's
+syscall table, for instance `9`. Refer to [signal(7)](https://man7.org/linux/man-pages/man7/signal.7.html)
+for available signals.
+
+The default signal to use is defined by the image's [`StopSignal`](https://github.com/opencontainers/image-spec/blob/v1.1.0/config.md),
+which can be set through the [`STOPSIGNAL`](https://docs.docker.com/reference/dockerfile/#stopsignal)
+Dockerfile instruction when building the image, or configured using the
+[`--stop-signal`](https://docs.docker.com/reference/cli/docker/container/run/#stop-signal)
+option when creating the container. If no signal is configured for the
+container, `SIGTERM` is used as default.
+
+### <a name="time"></a> Stop container with timeout (-t, --timeout)
+
+The `--time` flag sets the number of seconds to wait for the container
+to stop after sending the pre-defined (see [`--signal`]{#signal)) system call signal.
+If the container does not exit after the timeout elapses, it's forcibly killed
+with a `SIGKILL` signal.
+
+If you set `--time` to `-1`, no timeout is applied, and the daemon
+waits indefinitely for the container to exit.
+
+The default timeout can be specified using the [`--stop-timeout`](https://docs.docker.com/reference/cli/docker/container/run/#stop-timeout)
+option when creating the container. If no default is configured for the container,
+the Daemon determines the default, and is 10 seconds for Linux containers, and
+30 seconds for Windows containers.

docs/reference/commandline/container_stop.md

@@ -9,10 +9,10 @@ Stop one or more running containers
 
 ### Options
 
-| Name             | Type     | Default | Description                                  |
-|:-----------------|:---------|:--------|:---------------------------------------------|
-| `-s`, `--signal` | `string` |         | Signal to send to the container              |
-| `-t`, `--time`   | `int`    | `0`     | Seconds to wait before killing the container |
+| Name                                   | Type     | Default | Description                                  |
+|:---------------------------------------|:---------|:--------|:---------------------------------------------|
+| [`-s`](#signal), [`--signal`](#signal) | `string` |         | Signal to send to the container              |
+| [`-t`](#time), [`--time`](#time)       | `int`    | `0`     | Seconds to wait before killing the container |
 
 
 <!---MARKER_GEN_END-->
@@ -22,10 +22,40 @@ Stop one or more running containers
 The main process inside the container will receive `SIGTERM`, and after a grace
 period, `SIGKILL`. The first signal can be changed with the `STOPSIGNAL`
 instruction in the container's Dockerfile, or the `--stop-signal` option to
-`docker run`.
+`docker run` and `docker create`.
 
 ## Examples
 
 ```console
 $ docker stop my_container
 ```
+
+### <a name="signal"></a> Stop container with signal (-s, --signal)
+
+The `--signal` flag sends the system call signal to the container to exit.
+This signal can be a signal name in the format `SIG<NAME>`, for instance
+`SIGKILL`, or an unsigned number that matches a position in the kernel's
+syscall table, for instance `9`. Refer to [signal(7)](https://man7.org/linux/man-pages/man7/signal.7.html)
+for available signals.
+
+The default signal to use is defined by the image's [`StopSignal`](https://github.com/opencontainers/image-spec/blob/v1.1.0/config.md),
+which can be set through the [`STOPSIGNAL`](https://docs.docker.com/reference/dockerfile/#stopsignal)
+Dockerfile instruction when building the image, or configured using the
+[`--stop-signal`](https://docs.docker.com/reference/cli/docker/container/run/#stop-signal)
+option when creating the container. If no signal is configured for the
+container, `SIGTERM` is used as default.
+
+### <a name="time"></a> Stop container with timeout (-t, --timeout)
+
+The `--time` flag sets the number of seconds to wait for the container
+to stop after sending the pre-defined (see [`--signal`]{#signal)) system call signal.
+If the container does not exit after the timeout elapses, it's forcibly killed
+with a `SIGKILL` signal.
+
+If you set `--time` to `-1`, no timeout is applied, and the daemon
+waits indefinitely for the container to exit.
+
+The default timeout can be specified using the [`--stop-timeout`](https://docs.docker.com/reference/cli/docker/container/run/#stop-timeout)
+option when creating the container. If no default is configured for the container,
+the Daemon determines the default, and is 10 seconds for Linux containers, and
+30 seconds for Windows containers.