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bash循环未正确更新输出

echo loops bash

souki · 技术社区 · 6 年前

我在bash中编写了一个测试脚本来测试我的服务器。测试进度百分比将被更新并替换为测试状态,或者 OK ,或 KO

Test 1/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 2/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 3/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 4/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 5/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 6/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 7/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 8/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)

Test 1/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 2/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 3/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 4/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 5/8 : 10 channel(s) and 100 stream(s) : OK (3000/3000)
Test 6/8 : 10 channel(s) and 100 stream(s) : Processing...
                                              0%
                                              10.00%
                                              20.00%
                                              30.00%
                                              40.00%
                                              50.00%
                                              60.00%
                                              70.00%
                                              80.00%
                                              90.00%
                                              OK (3000/3000)
Test 7/8 : 10 channel(s) and 100 stream(s) : Processing...
                                              0%
                                              10.00%
                                              20.00%
                                              30.00%
                                              40.00%
                                              50.00%
                                              60.00%
                                              70.00%
                                              80.00%
                                              90.00%
                                              OK (3000/3000)
Test 8/8 : 10 channel(s) and 100 stream(s) : Processing...
                                              0%
                                              10.00%
                                              20.00%
                                              30.00%
                                              40.00%
                                              50.00%
                                              60.00%
                                              70.00%
                                              80.00%
                                              90.00%
                                              OK (3000/3000)

正如您所看到的,一旦图形错误出现,它就会继续发生。还要注意,它发生在随机的时刻,有时,它根本不会出现。

for ((i=0; i < d; i++));
do
        echo "Test $((${i} + 1))/${d} : ${channelTab[i]} channel(s) and ${streamTab[i]} stream(s) : ${saveCursor}Processing..."
        sent=0
        received=0
        errors=0
        e=0
        for ((idx = 0; idx < ${channelTab[i]}; idx++));
        do
                /u/ecmg/bin/simulator ${fileNameTab[i]} > /dev/null 2<&1 &
                pourcentage=$(bc <<< "scale=2;((${idx}))/${channelTab[i]} *100")
                echo ${restoreCursor}${eraseEndOfLine}${saveCursor}${pourcentage}%
                pids[idx]=$!
                sleep .5
        done
        for pid in ${pids[*]}; do
                wait $pid
                results[e]=$(grep -a "stats" "${fileNameTab[i]}.out")
                ((e=e+1))
        done
        for ((f=0; f < e; f++));
        do
                res=$(echo "${results[f]}" | grep -o -E '[0-9]+')
                resArray=($res)
                ((sent=sent + ${resArray[0]}))
                ((received=received + ${resArray[1]}))
                ((errors=errors + ${resArray[2]}))
        done
        if [ "$sent" != "$received" ];
        then
                echo -e "${restoreCursor}${eraseEndOfLine}${red}KO${normal} --> ${errors} errors (${received}/${sent})"
        fi
        if [ "$sent" == "$received" ];
        then
                echo -e "${restoreCursor}${eraseEndOfLine}${green}OK${normal} (${received}/${sent})"
        fi
done

${restorCursor} ${eraseEndOfLine} ${saveCursor} 定义:

saveCursor=$'\033[s'
restoreCursor=$'\033[u'
eraseEndOfLine=$'\033[K'

1 回复 | 直到 6 年前

Nahuel Fouilleul 6 年前

似乎是由于终端的滚动,当在屏幕底部打印新行时,行会移动到顶部。

解决方法可能是 printf 或 echo -n 以避免打印换行。