Unexpected operator error [duplicate]

Question

What is wrong in my code?

#!/bin/sh  LOOK_FOR="$1"  for i in `find $2 -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

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 ... 

Answer 1

You need to use = instead of == in the [ $? == 0 ] line.