ssize_t

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025                            MONGOC_STREAM_READV(3)

       • stream: A mongoc_stream_t.

       • iov: A vector of mongoc_iovec_t.

       • iovcnt: The number of items in iov.

       • min_bytes: The minimum number of bytes to read or failure will be indicated.

       • timeout_msec:  A  timeout in milliseconds, or 0 to indicate non-blocking. A negative value with use the
         default timeout.

       This function is identical to mongoc_stream_read() except that  it  takes  a  mongoc_iovec_t  to  perform
       gathered I/O.

       WARNING:
          The  "default  timeout"  indicated  by  a  negative  value  is  both  unspecified and unrelated to the
          documented default values for *TimeoutMS URI options.  To  specify  a  default  timeout  value  for  a
          *TimeoutMS URI option, use the MONGOC_DEFAULT_* constants defined in mongoc-client.h.

>=0 on success, -1 on failure and errno is set.

       SEEALSO:mongoc_stream_read()mongoc_stream_write()mongoc_stream_writev()

          ssize_t
          mongoc_stream_readv (mongoc_stream_t *stream,
                               mongoc_iovec_t *iov,
                               size_t iovcnt,
                               size_t min_bytes,
                               int32_t timeout_msec);