4.4BSD/usr/share/man/cat3/rexec.0

REXEC(3)                    BSD Programmer's Manual                   REXEC(3)

NNAAMMEE
     rreexxeecc - return stream to a remote command

SSYYNNOOPPSSIISS
     _i_n_t
     rreexxeecc(_a_h_o_s_t, _i_n_t _i_n_p_o_r_t, _c_h_a_r _*_u_s_e_r, _c_h_a_r _*_p_a_s_s_w_d, _c_h_a_r _*_c_m_d, _i_n_t _*_f_d_2_p);

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     ppaattiibbiilliittyy lliibbrraarryy,, lliibbccoommppaatt..

     The rreexxeecc() function looks up the host _*_a_h_o_s_t using gethostbyname(3),
     returning -1 if the host does not exist.  Otherwise _*_a_h_o_s_t is set to the
     standard name of the host.  If a username and password are both speci-
     fied, then these are used to authenticate to the foreign host; otherwise
     the environment and then the user's _._n_e_t_r_c file in his home directory are
     searched for appropriate information.  If all this fails, the user is
     prompted for the information.

     The port _i_n_p_o_r_t 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
     _s_t_d_i_n and _s_t_d_o_u_t. If _f_d_2_p is non-zero, then an auxiliary channel to a
     control process will be setup, and a descriptor for it will be placed in
     _*_f_d_2_p. 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 au-
     thorization failure, as the secondary connection is set up after autho-
     rization has been verified.  If _f_d_2_p is 0, then the _s_t_d_e_r_r (unit 2 of the
     remote command) will be made the same as the _s_t_d_o_u_t 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.

SSEEEE AALLSSOO
     rcmd(3),  rexecd(8)

HHIISSTTOORRYY
     The rreexxeecc() function appeared in 4.2BSD.

4.2 Berkeley Distribution        June 4, 1993                                1