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42 lines
1.4 KiB
Plaintext
42 lines
1.4 KiB
Plaintext
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#!/bin/bash
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# switch-wm — choose which window manager lightdm boots you into.
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# Flips the autologin + default session between i3 and dwm in both lightdm
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# config files (main lightdm.conf overrides the conf.d drop-in, so keep both in
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# sync). Reboot or log out to apply.
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# switch-wm show the current boot session
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# switch-wm dwm boot into dwm next time
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# switch-wm i3 boot into i3 next time
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# Recovery: if a session misbehaves at boot, go to a TTY (Ctrl+Alt+F3),
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# log in, run `switch-wm i3`, then `reboot`.
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set -euo pipefail
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readonly CONFS=(
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/etc/lightdm/lightdm.conf
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/etc/lightdm/lightdm.conf.d/50-autologin.conf
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)
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show_current() {
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grep -hE '^autologin-session=' /etc/lightdm/lightdm.conf 2>/dev/null \
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| tail -1 | cut -d= -f2
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}
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target="${1:-}"
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case "$target" in
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"") echo "boot session: $(show_current)"; exit 0 ;;
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i3|dwm) ;;
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*) echo "Usage: $(basename "$0") {i3|dwm} (no arg = show current)" >&2; exit 1 ;;
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esac
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if [[ ! -f "/usr/share/xsessions/${target}.desktop" ]]; then
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echo "Error: /usr/share/xsessions/${target}.desktop not found — is '${target}' installed?" >&2
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exit 1
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fi
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for f in "${CONFS[@]}"; do
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[[ -f "$f" ]] || continue
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sudo sed -i -E \
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"s/^(autologin-session=).*/\1${target}/; s/^(user-session=).*/\1${target}/" "$f"
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done
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echo "Boot session set to '${target}'. Reboot (or log out) to apply."
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