The ipcrun command uses ipccommand and ipcclient to connect to the ipcexec server (specified at compile time). It makes request a request to execute prog with the highest privilege permitted by the server.
The ipcrun program sends any input it receives on standard input to the ipcexec server, and prints any data it receives from the server to standard output. The usage above is equivalent to the following ipcdo invocation
ipcdo root prog
William Baxter <firstname.lastname@example.org>