static int
kill_cmd(void)
{
struct player *other;
if (!may_play())
return RET_FAIL;
other = getplayer(player->cnum);
if (!other) {
pr_id(player, C_EXIT, "country not in use\n");
return RET_FAIL;
}
logerror("%s killed country #%d", praddr(player), player->cnum);
pr_flash(other, "Disconnected by %s\n", praddr(player));
io_set_eof(other->iop);
other->aborted = 1;
other->may_sleep = PLAYER_SLEEP_NEVER;
empth_wakeup(other->proc);
pr_id(player, C_EXIT, "terminated %s's connection\n", praddr(other));
return RET_OK;
}
/*
* Receive a line of input from the current player.
* If the player's aborted flag is set, return -1 without receiving
* input.
* Else receive one line and store it in CMD[SIZE].
* This may block for input, yielding the processor. Flush buffered
* output when blocking, to make sure player sees the prompt.
* If the player's connection has the I/O error or EOF indicator set,
* or the line is "aborted", set the player's aborted flag and return
* -1.
* If we block and time out, set the EOF indicator on the player's
* connection, set the player's aborted flag, and return -1.
* If the line is "ctld", set the player's eof and aborted flag and
* return -1.
* Else return the length of the line.
* Design bug: there is no way to indicate truncation of a long line.
*/
int
recvclient(char *cmd, int size)
{
int count, res;
time_t deadline;
count = -1;
while (!player->aborted) {
/* Try to get a line of input */
count = io_gets(player->iop, cmd, size);
if (count >= 0) {
/* got it */
if (strcmp(cmd, "ctld") == 0)
player->aborted = player->got_ctld = 1;
if (strcmp(cmd, "aborted") == 0)
player->aborted = 1;
journal_input(cmd);
break;
}
/*
* Flush all queued output before potentially sleeping in
* io_input(), to make sure player sees the prompt.
*/
deadline = player_io_deadline(player, 0);
while (io_output(player->iop, deadline) > 0)
;
/*
* Try to receive some input. Need to recompute deadline;
* command abortion during io_output() might have changed it.
*/
deadline = player_io_deadline(player, 0);
res = io_input(player->iop, deadline);
if (res > 0)
;
else if (res < 0)
player->aborted = 1;
else if (io_eof(player->iop))
player->aborted = 1;
else if (!player->aborted) {
pr_flash(player, "idle connection terminated\n");
io_set_eof(player->iop);
player->aborted = 1;
}
}
if (player->aborted) {
player->recvfail++;
if (player->recvfail > 255) {
/*
* Looks like the thread is stuck in a loop that fails to
* check errors; oops once, then slow it down drastically.
*/
CANT_HAPPEN(player->recvfail == 256);
empth_sleep(time(NULL) + 60);
}
return -1;
}
player->recvfail = 0;
return count;
}
