Manual Page Result
0
Command: rcmdsh | Section: 3 | Source: OpenBSD | File: rcmdsh.3
RCMDSH(3) FreeBSD 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, 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 ssh(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 getaddrinfo(3) and,
if the host exists, *ahost is set to the canonical name of the host. A
connection is then 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 ALSO
ssh(1), socketpair(2), rcmd(3)
HISTORY
The rcmdsh() function first appeared in OpenBSD 2.0.
BUGS
If ssh(1) encounters an error, a file descriptor is still returned
instead of -1.
FreeBSD 14.1-RELEASE-p8 May 28, 2016 FreeBSD 14.1-RELEASE-p8