在不使用睡眠命令的情况下找到经过的长时间工作时间或长期运行时间的持续时间

Question

我试图在Linux中捕获长期运行的时间。

我尝试了以下方法1，但是由于操作花费了4个小时，但仅在几分钟内显示持续时间

方法1：

$ TAR_STARTTIMESTAMP=$(date +%s)
$ TAR_STARTTIME=`date +"%d/%b/%Y %H:%M"`
$ tar -cvf /u05/expdpdump/exppdb/TAR_EXP_DUMP_Wallet.tar /u05/expdpdump/exppdb/*.dmp
tar: Removing leading '/' from member names
/u05/expdpdump/exppdb/NoTDE_PDB_FULL.dmp
tar: /u05/expdpdump/exppdb/NoTDE_PDB_FULL.dmp: file changed as we read it
/u05/expdpdump/exppdb/NoTDE_PDB_FULL_wallet_01.dmp
/u05/expdpdump/exppdb/NoTDE_PDB_FULL_wallet_02.dmp
$ TAR_TAR_ENDTIMESTAMP=$(date +%s)
$ TAR_ENDTIME=`date +"%d/%b/%Y %H:%M"`
$ TAR_DIFFTIMESTAMP=$(( ${TAR_ENDTIMESTAMP} - ${TAR_STARTTIMESTAMP} ))
$ TAR_DIFFTIME=`date -u -d @${TAR_DIFFTIMESTAMP} "+%H hours, %M minutes and %S seconds"`
$ echo "Tar Started: ${TAR_STARTTIME}" >> /u05/expdpdump/exppdb/EXP_TAR_DUMP.log
$ echo "Tar Finished: ${TAR_ENDTIME}" >> /u05/expdpdump/exppdb/EXP_TAR_DUMP.log
$ echo "Tar took ${TAR_DIFFTIME} to complete" >> /u05/expdpdump/exppdb/EXP_TAR_DUMP.log
$ less /u05/expdpdump/exppdb/EXP_TAR_DUMP.log
Tar Started: 19/Mar/2019 19:12
Tar Finished: 19/Mar/2019 20:29
Tar took 04 hours, 47 minutes and 30 seconds to complete

我尝试使用以下外壳进行更改以分配变量并创建日志

方法2

这是我的代码

### Code Starts Here ###
read -p "Enter the File Path: " FILE_PATH 
read -p "Enter the Log Name: " LOG_NAME
read -p "Enter the Activity Name: " ACTIVITY

touch $FILE_PATH/$LOG_NAME
"${ACTIVITY}"_START_TIMESTAMP=$(date +%s)
ACTIVITY_START_TIME=`date "+%Y/%m/%d %H:%M:%S"`
# run the desired long running activity
$ACTIVITY_END_TIMESTAMP=$(date +%s)
$ACTIVITY_END_TIME=`date "+%Y/%m/%d %H:%M:%S"`
$ACTIVITY_DIFF_TIMESTAMP=$(( ${ACTIVITY_END_TIMESTAMP} - ${ACTIVITY_START_TIMESTAMP} ))
$ACTIVITY_DIFF_TIME=`date -u -d @${ACTIVITY_DIFF_TIMESTAMP} "+%H hours, %M minutes and %S seconds"`

echo "$ACTIVITY Started: ${ACTIVITY_STARTTIME}" >>  $FILE_PATH/$LOG_NAME
echo "$ACTIVITY Finished: ${ACTIVITY_ENDTIME}" >> $FILE_PATH/$LOG_NAME
echo "$ACTIVITY took ${ACITIVITY_DIFFTIME} to complete" >> $FILE_PATH/$LOG_NAME
### Code Ends Here ###

当我尝试导出以下变量时，我会得到错误

$ ${ACTIVITY}_START_TIMESTAMP=$(date +%s)
-bash: TAR_START_TIMESTAMP=1553021544: command not found
$ '${ACTIVITY}'_START_TIMESTAMP=$(date +%s)
-bash: ${ACTIVITY}_START_TIMESTAMP=1553021623: command not found
$ "${ACTIVITY}"_START_TIMESTAMP=$(date +%s)
-bash: TAR_START_TIMESTAMP=1553021737: command not found
$ "${ACTIVITY}_START_TIMESTAMP=$(date +%s)"
-bash: TAR_START_TIMESTAMP=1553021808: command not found 

有人可以帮助修复我的第一个方法或第二种方法。

Answer 1

代码

#!/bin/bash
array=()
function dump () {
   timestamp=$(date +%s)
   object=${1}
   action=${2}
    if [ "${action}" == "start" ]; then
        array[object]=${timestamp}
    elif [ "${action}" == "end" ]; then
        spent=$(( ${timestamp} - ${array[${object}]} ))
        echo "Time report for ${object}"
        echo "Started: $(date -d @${array[${object}]})"
        echo "Ended: $(date -d @${timestamp})"
        printf "Spent: %dh:%dm:%dsn" $((${spent}/3600)) $((${spent}%3600/60)) $((${spent}%60))
    fi
}
# MAIN
dump "iter1" "start"
echo "iter1 started"
sleep 2
dump "iter1" "end"
echo "iter2 started"
dump "iter2" "start"
echo "iter3 started"
dump "iter3" "start"
sleep 2
dump "iter2" "end"
sleep 2
dump "iter3" "end"

输出

iter1 started
Time report for iter1
Started: Wed Mar 20 11:27:17 UTC 2019
Ended: Wed Mar 20 11:27:19 UTC 2019
Spent: 0h:0m:2s
iter2 started
iter3 started
Time report for iter2
Started: Wed Mar 20 11:27:19 UTC 2019
Ended: Wed Mar 20 11:27:21 UTC 2019
Spent: 0h:0m:2s
Time report for iter3
Started: Wed Mar 20 11:27:19 UTC 2019
Ended: Wed Mar 20 11:27:23 UTC 2019
Spent: 0h:0m:4s