2 * TCP/IP stream emulation for GNU Emacs.
3 * Copyright (C) 1988, 1989, 1992, 1993 Free Software Foundation, Inc.
5 * Author: Masanobu Umeda
6 * Maintainer: umerin@mse.kyutech.ac.jp
8 This file is part of GNU Emacs.
10 GNU Emacs is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 GNU Emacs is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with GNU Emacs; see the file COPYING. If not, write to
22 the Free the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA.
26 * Yasunari, Itoh at PFU limited contributed for Fujitsu UTS and SX/A.
28 * Thu Apr 6 13:47:37 JST 1989
29 * USG fixes by Sakaeda <saka@mickey.trad.pf.fujitsu.junet>
31 * For Fujitsu UTS compile with:
32 * cc -O -o tcp tcp.c -DFUJITSU_UTS -lu -lsocket
38 #include <sys/types.h>
42 #include <sys/ucbtypes.h>
43 #include <sys/tisp/socket.h>
45 #include <sys/tisp/in.h>
47 #include <sys/socket.h>
49 #include <netinet/in.h>
62 fcntl (fileno (stdin), F_SETFL, 0);
72 struct sockaddr_in sockin, sockme;
74 char *hostname = NULL;
75 char *service = "nntp";
79 int server; /* NNTP Server */
80 int emacsIn = fileno (stdin); /* Emacs intput */
81 int emacsOut = fileno (stdout); /* Emacs output */
83 int nbuffer; /* Number of bytes in buffer */
85 char *retry; /* retry bufferp */
86 int false = 0; /* FALSE flag for setsockopt () */
90 fprintf (stderr, "Usage: %s HOST [SERVICE]\n", argv[0]);
98 if ((host = gethostbyname (hostname)) == NULL)
100 perror ("gethostbyname");
103 if (isdigit (service[0]))
104 port = atoi (service);
107 serv = getservbyname (service, "tcp");
110 perror ("getservbyname");
116 memset (&sockin, 0, sizeof (sockin));
117 sockin.sin_family = host->h_addrtype;
118 memcpy (&sockin.sin_addr, host->h_addr, host->h_length);
119 sockin.sin_port = port;
120 if ((server = socket (AF_INET, SOCK_STREAM, 0)) < 0)
125 if (setsockopt (server, SOL_SOCKET, SO_REUSEADDR, &false, sizeof (false)))
127 perror ("setsockopt");
130 memset (&sockme, 0, sizeof (sockme));
131 sockme.sin_family = sockin.sin_family;
132 sockme.sin_addr.s_addr = INADDR_ANY;
133 if (bind (server, &sockme, sizeof (sockme)) < 0)
138 if (connect (server, &sockin, sizeof (sockin)) < 0)
146 fcntl (server, F_SETFL, O_NDELAY);
149 /* USG pipe cannot not select emacsIn */
152 fstat (emacsIn, &statbuf);
153 if (statbuf.st_mode & 010000)
157 signal (SIGINT, sigout);
158 fcntl (emacsIn, F_SETFL, O_NDELAY);
164 /* Connection established. */
167 readfds = (1 << server) | (1 << emacsIn);
168 if (select (32, &readfds, NULL, NULL, (struct timeval *)NULL) == -1)
173 if (readfds & (1 << emacsIn))
176 nbuffer = read (emacsIn, buffer, sizeof buffer -1);
179 if (selectable && nbuffer == 0)
183 else if (!(readfds & (1 << server)) && nbuffer == 0)
192 for (retry = buffer; nbuffer > 0; nbuffer -= wret, retry += wret)
194 writefds = 1 << server;
195 if (select (server+1, NULL, &writefds, NULL, (struct timeval*)NULL) == -1)
200 wret = write (server, retry, nbuffer);
201 if (wret < 0) goto finish;
204 if (readfds & (1 << server))
206 /* From NNTP server */
207 nbuffer = read (server, buffer, sizeof buffer -1);
210 for (retry = buffer; nbuffer > 0; nbuffer -= wret, retry += wret)
212 writefds = 1 << emacsOut;
216 if (select (emacsOut+1, NULL, &writefds, NULL, (struct timeval*)NULL) == -1)
221 wret = write (emacsOut, retry, nbuffer);
222 if (wret < 0) goto finish;
227 /* End of communication. */
231 if (!selectable) fcntl (emacsIn, F_SETFL, 0);