SOAP POST Request with Body & Anonymous Attachments possible through Curl?

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I wanted to check, if a Curl command to create a SOAP Post request with a body i.e. request.xml and an anonymous attachment i.e. test.eml is possible? If yes then what options to use? 
I have successfully tested this scenario in SOAPUI for my web service. But somehow, i am unable to find options to generate a curl command to meet this particular scenario. Thanks for your help