34 lines
626 B
Plaintext
34 lines
626 B
Plaintext
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#!/bin/sh
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set -e
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ROTATION_FILE="$HOME/.rotation"
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SCREEN="$1"
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_core(){
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case "$1" in
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1) xrandr --output "$SCREEN" --rotate normal ;;
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2) xrandr --output "$SCREEN" --rotate left ;;
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3) xrandr --output "$SCREEN" --rotate inverted ;;
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4) xrandr --output "$SCREEN" --rotate right ;;
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*) return 1
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esac
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return 0
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}
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if [ -e "$ROTATION_FILE" ]
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then ROTATION="$(dd <"$ROTATION_FILE" 2>/dev/null)"
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if ! _core "$ROTATION"
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then _core 1
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ROTATION=2
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else ROTATION=$(printf "%s + 1\n" "$ROTATION" | bc)
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! [ "$ROTATION" -gt 4 ] \
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|| ROTATION=1
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fi
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else _core 1
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ROTATION=2
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fi
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printf "%s\n" "$ROTATION" >"$ROTATION_FILE"
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exit 0
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