13 lines
354 B
Bash
Executable file
13 lines
354 B
Bash
Executable file
#!/bin/bash
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set -e
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OldDir="$(pwd)"
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cd "$(dirname "$0")"
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if ! [ -e bookmark.txt ]; then
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echo "Please run $(dirname "$0")/init first to initialise the book"
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exit 1; fi
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N=$[ "$(cat bookmark.txt)" - 1 ]
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if [ "$N" == 0 ]; then
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echo "Cannot go back before the start of the book"; exit 1; fi
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echo $N > bookmark.txt
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cd "$OldDir"
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$(dirname "$0")/read
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