uci-docker-build/core/rootfs/opt/bin/entrypoint-help

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#!/bin/bash
cat <<HELP
--------- ENTRYPOINT HELP ----------
entrypoint commands are shell, maphostid, help, image, script and a custom command (start, by default)
otherwise you can pass any shell command such as 'ls -la'
----- Custom Command (start) -------------
the current container custom command is > ${ENTRYPOINT_CMD:-start}
and the script/binary that command runs is ${ENTRYPOINT_CMD_PATH:-$BIN_DIR/start}
you can replace this start script with your own or any binary
placed at init/opt/bin/start in your build source directory
or set the \$ENTRYPOINT_CMD_PATH and (optionally) the \$ENTRYPOINT_CMD variables
---------- script ---------------
you can pipe a script from the host to container with this command
script < test.sh
if you use a heredoc you can delay variable substition
until the command is run in container.
script << "SCRIPT"
echo $BIN_DIR
SCRIPT
----- Overwrite Entrypoint
It is also possible to completely override the container entrypoint with your own
$BIN_DIR/entrypoint script but is not recommmended as then a bash login shell is
assured (unless you see to it) and thus critical runtime environment variables
will not be set
HELP