rem = rexec(ahost, inport, user, passwd, cmd, fd2p); char **ahost; int inport; char *user, *passwd, *cmd; int *fd2p;
The port inport specifies which well-known DARPA Internet port to use for the connection; the call ``getservbyname("exec", "tcp")'' (see getservent.3n will return a pointer to a structure, which contains the necessary port. The protocol for connection is described in detail in rexecd.8c
If the connection succeeds, a socket in the Internet domain of type SOCK_STREAM is returned to the caller, and given to the remote command as stdin and stdout. If fd2p is non-zero, then an auxiliary channel to a control process will be setup, and a descriptor for it will be placed in *fd2p. The control process will return diagnostic output from the command (unit 2) on this channel, and will also accept bytes on this channel as being UNIX signal numbers, to be forwarded to the process group of the command. The diagnostic information returned does not include remote authorization failure, as the secondary connection is set up after authorization has been verified. If fd2p is 0, then the stderr (unit 2 of the remote command) will be made the same as the stdout and no provision is made for sending arbitrary signals to the remote process, although you may be able to get its attention by using out-of-band data.
Created by unroff & hp-tools. © by Hans-Peter Bischof. All Rights Reserved (1997).
Last modified 21/April/97