bash 意外的操作员错误
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时间：2020-09-09 18:50:11 来源:igfitidea点击:
Unexpected operator error
提问by wearetherock
What is wrong in my code?
我的代码有什么问题？
#!/bin/sh
LOOK_FOR=""
for i in `find -name "*jar"`; do
echo "Looking in $i ..."
#jar tvf $i | grep $LOOK_FOR > /dev/null
jar tvf "$i" | grep "$LOOK_FOR"
if [ $? == 0 ] ; then
echo "==> Found \"$LOOK_FOR\" in $i"
fi
done #line 13
Output
输出
wk@wk-laptop:$ sh lookjar.sh org/apache/axis/message/addressing/EndpointReference /media/0C06E20B06E1F61C/uengine/uengine
Looking in /media/0C06E20B06E1F61C/uengine/uengine/defaultcompany/build/uengine_settings.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/defaultcompany/WebContent/uengine-web/lib/FCKeditor/WEB-INF/lib/commons-fileupload.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/defaultcompany/WebContent/uengine-web/lib/FCKeditor/WEB-INF/lib/FCKeditor-2.3.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/defaultcompany/WebContent/uengine-web/processmanager/signedmetaworks.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/hsqldb/lib/hsqldb.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/hsqldb/lib/servlet.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/src/lib/commons-discovery.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/src/lib/google.jar ...
[: 13: 1: unexpected operator
Looking in /media/0C06E20B06E1F61C/uengine/uengine/src/lib/jxl.jar ...
回答by Chris Jester-Young
You need to use =instead of ==in the [ $? == 0 ]line.
你需要使用=，而不是==在[ $? == 0 ]行。
回答by R Samuel Klatchko
You should change that to:
您应该将其更改为：
if [ $? -eq 0 ]; then
...
-eqdoes a numeric comparison.
-eq进行数字比较。
You can also take advantage of the fact that in shell a return value of 0 is considered success and write your code like this:
您还可以利用在 shell 中返回值 0 被认为是成功的事实，并像这样编写代码：
if jar tvf "$i" | grep "$LOOK_FOR"; then
...
回答by ghostdog74
#!/bin/sh
LOOK_FOR=""
find -name "*jar"`| while read -r file
echo "Looking in $file ..."
jar tvf "$file" | grep "$LOOK_FOR"
if [ $? -eq 0 ] ; then
echo "==> Found \"$LOOK_FOR\" in $file"
fi
done
回答by slebetman
Try:
尝试：
if [[ $? == 0 ]]; then
echo "==> Found \"$LOOK_FOR\" in $i"
fi
