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December 12, 2015 05:08
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| LOCK="file.lock" | |
| FILENAME="prob15.txt" | |
| TEMPFILE="temp_file.txt" | |
| count=5 | |
| one=1 | |
| i=1 | |
| end=1000 | |
| while [ $i -lt $end ] | |
| do | |
| if [ ! -e $LOCK ]; | |
| then | |
| echo "lock file" > "$LOCK" | |
| value=$(tail -1 $FILENAME) | |
| count=`expr $value + $one` | |
| echo "$count" >> "$FILENAME" | |
| $i=`expr $i + $one` | |
| rm "$LOCK" | |
| fi | |
| done | |
| exit 0 |
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