RCMDSH(3) OpenBSD Programmer's Manual RCMDSH(3)NAMErcmdsh - 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, 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
numbers using rsh(1) or the value of rshprog (if non-null). rshprog may
be a fully-qualified path, a non-qualified command, or a command
containing space-separated command line arguments.
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 and stdout, and stderr.
DIAGNOSTICS
The rcmdsh() function returns a valid socket descriptor on success. It
returns -1 on error and prints a diagnostic message on the standard
error.
SEE ALSOrsh(1), socketpair(2), rcmd(3), rshd(8)HISTORY
The rcmdsh() function first appeared in OpenBSD 2.0.
BUGS
If rsh(1) encounters an error, a file descriptor is still returned
instead of -1.
OpenBSD 4.9 December 29, 2009 OpenBSD 4.9
