rexec(3x)                  DG/UX 4.30                   rexec(3x)



     NAME
          rexec - return stream to a remote command

     SYNOPSIS
          rem = rexec(ahost, inport, user, passwd, cmd, fd2p);
          char **ahost;
          ushort inport;
          char *user, *passwd, *cmd;
          int *fd2p;

     DESCRIPTION
          Rexec looks up the host *ahost using gethostbyname(3N),
          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; it will normally be the
          value returned from the call ``getservbyname("exec",
          "tcp")'' (see getservent(3N)).  The protocol for connection
          is described in detail in rexecd(1M).

          If the call succeeds, a socket 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 a auxiliary
          channel to a control process will be setup, 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
          DG/UX system signal numbers, to be forwarded to the process
          group of the command.  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.

     SEE ALSO
          rcmd(3X), rexecd(1M)

     BUGS
          There is no way to specify options to the socket call which
          rexec makes.









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