12 lines
322 B
Plaintext
12 lines
322 B
Plaintext
init() { if [ -e stack ]; then rm stack; fi } # force pop to blow up if empty
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push() { echo $1 >> stack; }
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pop() {
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tail -1 stack;
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x=`head -n -1 stack | wc -c`
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if [ $x -eq '0' ]; then rm stack; else
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truncate -s `head -n -1 stack | wc -c` stack
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fi
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}
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empty() { head -n -1 stack |wc -l; }
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stack_top() { tail -1 stack; }
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