s3cmd-signed-url -b bucket -o object_uri [-a access_key] [-s seconds] [-v verb] [-c scheme]

-b bucket_name: bucket name (example: my-bucket)
-o object_uri: URI part of object in S3 bucket (example: somefolder/somefile.ext)
-v http_verb: HTTP verb to access a object in S3 bucket (default ${HTTP_VERB})
-c scheme: Scheme of url (default ${S3_SCHEME})
-a access_key: S3 Access Key (default: Access key in ${HOME}/.s3cfg: ${S3_ACCESS_KEY})
-s seconds: how long the signed url will be valid (default 3600)
-h: see this usage information