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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 numbers 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 connec-
tion 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. Otherwise, -1 is re-
turned and a diagnostic message is printed on the standard error.
SEE ALSO
rsh(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
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