一个计算程式执行时间的 Shell Script :

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#!/bin/sh
T1_maj=`date +%s`
T1_min=`tcsh -c time | awk '{print $3}' | awk -F: '{print $2}' | awk -F. '{print $2}'`


# ============ Put your Caculating Code ==================
sleep 3
# ============ Put your Caculating Code ==================


T2_maj=`date +%s`
T2_min=`tcsh -c time | awk '{print $3}' | awk -F: '{print $2}' | awk -F. '{print $2}'`


if [ $T2_min -ge $T1_min ] ; then
Td_maj=`expr $T2_maj - $T1_maj`
Td_min=`expr $T2_min - $T1_min`
else
Td_maj=`expr $T2_maj - $T1_maj - 1`
Td_min=`expr $T2_min - $T1_min + 100`
fi

echo "T1 : $T1_maj.$T1_min"

echo "T2 : $T2_maj.$T2_min"

echo "Td = T2 - T1 : $Td_maj.$Td_min"