| REXEC(3) | Library Functions Manual | REXEC(3) | 
rexec —
rexec(char
  **ahost, int inport,
  char *user,
  char *passwd,
  char *cmd,
  int *fd2p);
The rexec() 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. If a
    username and password are both specified, then these are used to
    authenticate to the foreign host; otherwise the environment and then the
    user's .netrc file in his home directory are
    searched for appropriate information. If all this fails, the user is
    prompted for the information.
The port inport specifies which well-known
    DARPA Internet port to use for the connection; the call
    ‘getservbyname("exec",
    "tcp")’ (see
    getservent(3)) will return
    a pointer to a structure, which contains the necessary port. The protocol
    for connection is described in detail in
    rexecd(8).
If the connection succeeds, a socket in the Internet domain of
    type SOCK_STREAM is returned to the caller, and
    given to the remote command as stdin and
    stdout. If fd2p is non-zero, then an
    auxiliary channel to a control process will be set up, and a descriptor for
    it will be placed in *fd2p. The control process will
    return diagnostic output from the command (unit 2) on this channel, and will
    also accept bytes on this channel as being UNIX
    signal numbers, to be forwarded to the process group of the command. The
    diagnostic information returned does not include remote authorization
    failure, as the secondary connection is set up after authorization has been
    verified. If fd2p is 0, then the
    stderr (unit 2 of the remote command) will be made the
    same as the stdout and no provision is made for sending
    arbitrary signals to the remote process, although you may be able to get its
    attention by using out-of-band data.
rexec() function appeared in
  4.2BSD.
| June 4, 1993 | NetBSD 9.3 |