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#!/usr/bin/env bash
# max25d-session — run max25d inside tmux or GNU screen (operator attach/detach).
#
# max25d-session start [--tmux|--screen] [-c /etc/max25/max25d.ini]
# max25d-session attach [--tmux|--screen]
# max25d-session status
# max25d-session stop
#
# Environment overrides:
# MAX25D_SESSION session name (default: max25d)
# MAX25D_SESSION_BACKEND tmux | screen (default: tmux)
# MAX25D_INI config path
set -euo pipefail
SESSION_NAME="${MAX25D_SESSION:-max25d}"
BACKEND="${MAX25D_SESSION_BACKEND:-tmux}"
CONFIG="${MAX25D_INI:-/etc/max25/max25d.ini}"
MAX25D_BIN="${MAX25D_BIN:-max25d}"
usage() {
cat <<'EOF'
max25d-session — persistent max25d in tmux or screen
Commands:
start [--tmux|--screen] [-c ini] start detached session
attach [--tmux|--screen] attach to running session
status show session + max25d hint
stop kill session
Examples:
max25d-session start -c /etc/max25/max25d.ini
max25d-session attach
MAX25D_SESSION_BACKEND=screen max25d-session start
EOF
}
have_tmux() { command -v tmux >/dev/null 2>&1; }
have_screen() { command -v screen >/dev/null 2>&1; }
pick_backend() {
case "${1:-$BACKEND}" in
tmux)
if ! have_tmux; then
echo "max25d-session: tmux not installed" >&2
exit 1
fi
echo tmux
;;
screen)
if ! have_screen; then
echo "max25d-session: screen not installed" >&2
exit 1
fi
echo screen
;;
*)
echo "max25d-session: unknown backend '$1' (use tmux or screen)" >&2
exit 1
;;
esac
}
session_running() {
local b="$1"
case "$b" in
tmux) tmux has-session -t "$SESSION_NAME" 2>/dev/null ;;
screen) screen -ls | grep -q "[[:space:]]*[0-9]*\.${SESSION_NAME}[[:space:]]" ;;
esac
}
cmd_start() {
local b
b="$(pick_backend "$BACKEND")"
if session_running "$b"; then
echo "max25d-session: session '$SESSION_NAME' already running ($b)" >&2
echo " attach: max25d-session attach --$b" >&2
exit 1
fi
local cmd="${MAX25D_BIN} -c ${CONFIG}"
case "$b" in
tmux)
tmux new-session -d -s "$SESSION_NAME" \
"${MAX25D_BIN} -c ${CONFIG}; echo; echo max25d exited \$?; read -r _"
;;
screen)
screen -dmS "$SESSION_NAME" bash -lc "${cmd}"
;;
esac
echo "max25d-session: started ($b) name=$SESSION_NAME config=$CONFIG"
echo "max25d-session: attach with: max25d-session attach --$b"
}
cmd_attach() {
local b
b="$(pick_backend "$BACKEND")"
if ! session_running "$b"; then
echo "max25d-session: no session '$SESSION_NAME' ($b)" >&2
exit 1
fi
case "$b" in
tmux) exec tmux attach -t "$SESSION_NAME" ;;
screen) exec screen -r "$SESSION_NAME" ;;
esac
}
cmd_status() {
local b
b="$(pick_backend "$BACKEND")"
if session_running "$b"; then
echo "max25d-session: running backend=$b name=$SESSION_NAME"
case "$b" in
tmux) tmux list-panes -t "$SESSION_NAME" -F 'pane #{pane_index}: #{pane_current_command}' 2>/dev/null || true ;;
screen) screen -ls | grep "${SESSION_NAME}" || true ;;
esac
else
echo "max25d-session: not running (backend=$b name=$SESSION_NAME)"
fi
if command -v pgrep >/dev/null 2>&1 && pgrep -x max25d >/dev/null 2>&1; then
echo "max25d-session: max25d process: $(pgrep -xa max25d || true)"
fi
}
cmd_stop() {
local b
b="$(pick_backend "$BACKEND")"
if ! session_running "$b"; then
echo "max25d-session: not running" >&2
exit 0
fi
case "$b" in
tmux) tmux kill-session -t "$SESSION_NAME" ;;
screen) screen -S "$SESSION_NAME" -X quit ;;
esac
echo "max25d-session: stopped ($b) name=$SESSION_NAME"
}
CMD="${1:-}"
shift || true
while [[ $# -gt 0 ]]; do
case "$1" in
--tmux) BACKEND=tmux; shift ;;
--screen) BACKEND=screen; shift ;;
-c|--config)
CONFIG="${2:?config path required}"
shift 2
;;
-h|--help) usage; exit 0 ;;
*) echo "max25d-session: unknown option: $1" >&2; usage >&2; exit 1 ;;
esac
done
case "$CMD" in
start) cmd_start ;;
attach) cmd_attach ;;
status) cmd_status ;;
stop) cmd_stop ;;
""|-h|--help) usage ;;
*) echo "max25d-session: unknown command: $CMD" >&2; usage >&2; exit 1 ;;
esac
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