rcmdsh - return a stream to a remote command without superuser
rcmdsh(char **ahost, int inport, const char *locuser,
const char *remuser, const char *cmd, char
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
to provide an interface similar to rcmd(3).
If the connection succeeds, a socket in the UNIX domain of
SOCK_STREAM is returned to the caller, and given to the remote command as
stdin and stdout, and stderr.
The rcmdsh() function returns a valid socket descriptor on
returns -1 on error and prints a diagnostic message on the
rsh(1), socketpair(2), rcmd(3), rshd(8)
The rcmdsh() function first appeared in OpenBSD 2.0.
If rsh(1) encounters an error, a file descriptor is still
OpenBSD 3.6 May 5, 2003
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