读取文件外壳脚本时无法读取十进制值

Question

我在Unix中有一个文件，其行如下：

INFO    29-4-2015 20:22:56  NOD_VMT01-32    DIRECTOR    VAR_27028   Use override value [850848.000000000000000] for user-defined workflow/worklet variable:[$$mplt_PROCESS_KEY].
INFO    29-4-2015 20:22:56  NOD_VMT01-32    DIRECTOR    VAR_27028   Use override value [850851.000000000000000] for user-defined workflow/worklet variable:[$$mplt_PROCESS_KEY1].
INFO    29-4-2015 20:22:56  NOD_VMT01-32    DIRECTOR    VAR_27028   Use override value [850852.000000000000000] for user-defined workflow/worklet variable:[$$mplt_PROCESS_KEY10].
INFO    29-4-2015 20:22:56  NOD_VMT01-32    DIRECTOR    VAR_27028   Use override value [850860.000000000000000] for user-defined workflow/worklet variable:[$$mplt_PROCESS_KEY11].

在读取.sh文件中的文件时，回送打印如下

INFO 29-4-2015 20:22:56 NOD_VMT01-32 DIRECTOR VAR_27028 Use override value 0 for user-defined workflow/worklet variable:[$$mplt_PROCESS_KEY9].

[850852.000000000000000]变成0。

代码：

#!/bin/bash
while read line
do  
if [[ $line == *"Use override value"* ]]
then
    echo $line 
    SUBSTRING=`echo $line| cut -d '[' -f 3 | cut -d ']' -f 1`
    SUBSTRING1=`echo $line| cut -d '[' -f 2 | cut -d ']' -f 1`
    echo $SUBSTRING" = "$SUBSTRING1
fi
done < $1

有人能帮我解决这个问题吗？

Answer 1

你没有引用你的"$variables"

while read line; do   
    if [[ $line == *"Use override value"* ]]; then     
        echo "$line"
        sub1=$(cut -d '[' -f 3 <<< "$line" | cut -d ']' -f 1)
        sub2=$(cut -d '[' -f 2 <<< "$line" | cut -d ']' -f 1)    
        echo "$sub1 = $sub2"
    fi
done < "$1"

INFO    29-4-2015 20:22:56  NOD_VMT01-32    DIRECTOR    VAR_27028   Use override value [850848.000000000000000] for user-defined workflow/worklet variable:[$$mplt_PROCESS_KEY].
$$mplt_PROCESS_KEY = 850848.000000000000000
INFO    29-4-2015 20:22:56  NOD_VMT01-32    DIRECTOR    VAR_27028   Use override value [850851.000000000000000] for user-defined workflow/worklet variable:[$$mplt_PROCESS_KEY1].
$$mplt_PROCESS_KEY1 = 850851.000000000000000
INFO    29-4-2015 20:22:56  NOD_VMT01-32    DIRECTOR    VAR_27028   Use override value [850852.000000000000000] for user-defined workflow/worklet variable:[$$mplt_PROCESS_KEY10].
$$mplt_PROCESS_KEY10 = 850852.000000000000000
INFO    29-4-2015 20:22:56  NOD_VMT01-32    DIRECTOR    VAR_27028   Use override value [850860.000000000000000] for user-defined workflow/worklet variable:[$$mplt_PROCESS_KEY11].
$$mplt_PROCESS_KEY11 = 850860.000000000000000

如果在shell提示符下执行echo [850860.000000000000000]，会发生什么情况？

您的当前目录中有名为"0“的文件吗？