---
name: "getrpcport"
section: "3"
platform: "macos"
package: "Libinfo"
version: "600"
release: "macOS 26.5"
platforms: ["linux", "freebsd", "macos"]
url: "https://new.carta.tech/getrpcport"
---

# getrpcport(3)

get RPC port number

## NAME

**getrpcport** – get RPC port number

## LIBRARY

Standard C Library (libc, -lc)

## SYNOPSIS

**#include \<rpc/rpc.h\>**

*int*\

**getrpcport**(*char \*host*, *int prognum*, *int versnum*, *int proto*);

## DESCRIPTION

The **getrpcport**() function returns the port number for version *versnum* of the RPC program *prognum* running on *host* and using protocol *proto*. It returns 0 if it cannot contact the portmapper, or if *prognum* is not registered. If *prognum* is registered but not with version *versnum*, it will still return a port number (for some version of the program) indicating that the program is indeed registered. The version mismatch will be detected upon the first call to the service.