Errore imprevisto dell’operatore

Cosa c’è di sbagliato nel mio codice?

#!/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 

Produzione

 [email protected]:$ 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 ...