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.\" -*- nroff -*- .\" .TH UMAD_OPEN_PORT 3 "May 21, 2007" "OpenIB" "OpenIB Programmer\'s Manual" .SH "NAME" umad_open_port \- open InfiniBand device port for umad access .SH "SYNOPSIS" .nf .B #include <infiniband/umad.h> .sp .BI "int umad_open_port(char " "*ca_name" ", int " "portnum" ); .fi .SH "DESCRIPTION" .B umad_open_port() opens the port .I portnum of the IB device .I ca_name for umad access. The port is selected by the library if not all parameters are provided (see .B umad_get_port() for details). .fi .SH "RETURN VALUE" .B umad_open_port() returns 0 or an unique positive value of umad device descriptor on success, and a negative value on error as follows: -ENODEV IB device can\'t be resolved -EINVAL port is not valid (bad .I portnum\fR or no umad device) -EIO umad device for this port can\'t be opened .SH "SEE ALSO" .BR umad_close_port (3), .BR umad_get_cas_names (3), .BR umad_get_port (3) .SH "AUTHOR" .TP Hal Rosenstock <halr@voltaire.com>