RCMDSH(3) BSD Library Functions Manual RCMDSH(3)NAME
rcmdsh — return a stream to a remote command without superuser
SYNOPSIS
#include <unistd.h>
int
rcmdsh(char **ahost, int inport, const char *locuser,
const char *remuser, const char *cmd, const char *rshprog);
DESCRIPTION
The rcmdsh() function is used by normal users to execute a command on a
remote machine using an authentication scheme based on reserved port num‐
bers using rshd(8) or the value of rshprog (if non-NULL).
The rcmdsh() function looks up the host *ahost using gethostbyname(3),
returning -1 if the host does not exist. Otherwise *ahost is set to the
standard name of the host and a connection is established to a server
residing at the well-known Internet port “shell/tcp” (or whatever port is
used by rshprog). The parameter inport is ignored; it is only included
to provide an interface similar to rcmd(3).
If the connection succeeds, a socket in the UNIX domain of type
SOCK_STREAM is returned to the caller, and given to the remote command as
stdin, stdout, and stderr.
RETURN VALUES
The rcmdsh() function returns a valid socket descriptor on success. Oth‐
erwise, -1 is returned and a diagnostic message is printed on the stan‐
dard error.
SEE ALSOrsh(1), socketpair(2), rcmd(3), rshd(8)BUGS
If rsh(1) encounters an error, a file descriptor is still returned
instead of -1.
HISTORY
The rcmdsh() function first appeared in OpenBSD 2.0, and made its way
into FreeBSD 5.0.
BSD September 1, 1996 BSD