2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2008, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * recvclient.c: Receive input from the client
30 * Known contributors to this file:
39 #include "prototypes.h"
42 * Receive a line of input from the current player.
43 * If the player's eof flag is set, return -1 without receiving input.
44 * If the player's aborted flag is set, return -2 without receiving
46 * Else receive one line and store it in CMD[SIZE].
47 * This may block for input, yielding the processor. Flush buffered
48 * output when blocking, to make sure player sees the prompt.
49 * If the player's connection has the I/O error indicator set, or the
50 * line is "aborted", set the player's aborted flag and return -2.
51 * If the player's connection has the EOF indicator set, or the line
52 * is "ctld", set the player's eof flag and return -1.
53 * Else return the length of the line.
54 * Design bug: there is no way to indicate truncation of a long line.
57 recvclient(char *cmd, int size)
62 while (!player->aborted && !player->eof) {
63 /* Try to get a line of input */
64 count = io_gets(player->iop, cmd, size);
67 if (strcmp(cmd, "ctld") == 0)
69 if (strcmp(cmd, "aborted") == 0)
75 /* Make sure player sees prompt */
76 io_output_all(player->iop);
79 * If io_output_all() blocked and got unblocked by command
80 * abortion, we must return without blocking in io_input().
85 /* Await more input */
86 io_input(player->iop, IO_WAIT);
87 if (io_error(player->iop))
89 else if (io_eof(player->iop))
93 if (player->aborted || player->eof) {
95 if (player->recvfail > 255) {
97 * Looks like the thread is stuck in a loop that fails to
98 * check errors; oops once, then slow it down drastically.
100 CANT_HAPPEN(player->recvfail == 256);
101 empth_sleep(time(NULL) + 60);
103 return player->eof ? -1 : -2;
106 player->recvfail = 0;