2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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33 * @(#)sync.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/games/sail/sync.c,v 1.9 1999/11/30 03:49:38 billf Exp $
35 * $DragonFly: src/games/sail/sync.c,v 1.4 2006/09/03 17:33:13 pavalos Exp $
40 #include <sys/errno.h>
44 static char sync_buf[BUFSIZE];
45 static char *sync_bp = sync_buf;
46 static char sync_lock[25];
47 static char sync_file[25];
48 static long sync_seek;
50 #define SF "/tmp/#sailsink.%d"
51 #define LF "/tmp/#saillock.%d"
53 static int sync_update(int, struct ship *, long, long, long, long);
56 fmtship(char *buf, size_t len, const char *fmt, struct ship *ship)
63 if (*fmt == '$' && fmt[1] == '$') {
64 size_t l = snprintf(buf, len, "%s (%c%c)",
65 ship->shipname, colours(ship), sterncolour(ship));
80 makesignal(struct ship *from, const char *fmt, struct ship *ship, ...)
88 vsprintf(message, fmt, ap);
90 fmtship(format, sizeof(format), fmt, ship);
91 vsprintf(message, format, ap);
94 Write(W_SIGNAL, from, 1, (long)message, 0, 0, 0);
97 #include <sys/types.h>
100 sync_exists(int lgame)
102 char buf[sizeof sync_file];
106 sprintf(buf, SF, game);
108 if (stat(buf, &s) < 0)
110 if (s.st_mtime < t - 60*60*2) { /* 2 hours */
112 sprintf(buf, LF, lgame);
124 sprintf(sync_lock, LF, game);
125 sprintf(sync_file, SF, game);
126 if (access(sync_file, 0) < 0) {
127 int omask = umask(issetuid ? 077 : 011);
128 sync_fp = fopen(sync_file, "w+");
131 sync_fp = fopen(sync_file, "r+");
148 Write(int type, struct ship *ship, char isstr, int a, int b, int c, int d)
151 sprintf(sync_bp, "%d %d %d %s\n",
152 type, ship->file->index, isstr, (char *)a);
154 sprintf(sync_bp, "%d %d %d %d %d %d %d\n",
155 type, ship->file->index, isstr, a, b, c, d);
159 if (sync_bp >= &sync_buf[sizeof sync_buf])
161 sync_update(type, ship, a, b, c, d);
167 sig_t sighup, sigint;
169 int type, shipnum, isstr, a, b, c, d;
172 sighup = signal(SIGHUP, SIG_IGN);
173 sigint = signal(SIGINT, SIG_IGN);
174 for (n = TIMEOUT; --n >= 0;) {
176 if (flock(fileno(sync_fp), LOCK_EX|LOCK_NB) >= 0)
178 if (errno != EWOULDBLOCK)
181 if (link(sync_file, sync_lock) >= 0)
190 fseek(sync_fp, sync_seek, 0);
192 switch (fscanf(sync_fp, "%d%d%d", &type, &shipnum, &isstr)) {
200 if (shipnum < 0 || shipnum >= cc->vessels)
202 if (isstr != 0 && isstr != 1)
207 switch (*p++ = getc(sync_fp)) {
213 if (p >= buf + sizeof buf)
220 for (p = buf; *p == ' '; p++)
225 if (fscanf(sync_fp, "%d%d%d%d", &a, &b, &c, &d) != 4)
227 if (sync_update(type, SHIP(shipnum), a, b, c, d) < 0)
233 if (!erred && sync_bp != sync_buf) {
234 fseek(sync_fp, 0L, 2);
235 fwrite(sync_buf, sizeof *sync_buf, sync_bp - sync_buf,
240 sync_seek = ftell(sync_fp);
242 flock(fileno(sync_fp), LOCK_UN);
246 signal(SIGHUP, sighup);
247 signal(SIGINT, sigint);
248 return erred ? -1 : 0;
252 sync_update(int type, struct ship *ship, long a, long b, long c, long d)
256 struct BP *p = &ship->file->DBP[a];
263 struct BP *p = &ship->file->OBP[a];
270 struct snag *p = &ship->file->foul[a];
271 if (SHIP(a)->file->dir == 0)
273 if (p->sn_count++ == 0)
279 struct snag *p = &ship->file->grap[a];
280 if (SHIP(a)->file->dir == 0)
282 if (p->sn_count++ == 0)
288 struct snag *p = &ship->file->foul[a];
289 if (p->sn_count > 0) {
291 ship->file->nfoul -= p->sn_count;
301 struct snag *p = &ship->file->grap[a];
302 if (p->sn_count > 0) {
304 ship->file->ngrap -= p->sn_count;
314 if (mode == MODE_PLAYER) {
316 Signal("%s (%c%c): %s", ship, a);
318 Signal("\7%s (%c%c): %s", ship, a);
322 struct shipspecs *s = ship->specs;
329 strncpy(ship->file->captain, (char *)a,
330 sizeof ship->file->captain - 1);
331 ship->file->captain[sizeof ship->file->captain - 1] = 0;
335 ship->file->captured = 0;
337 ship->file->captured = SHIP(a);
340 ship->specs->class = a;
343 ship->file->drift = a;
346 if ((ship->file->explode = a) == 2)
353 struct shipspecs *s = ship->specs;
359 struct shipspecs *s = ship->specs;
365 ship->specs->hull = a;
368 strncpy(ship->file->movebuf, (char *)a,
369 sizeof ship->file->movebuf - 1);
370 ship->file->movebuf[sizeof ship->file->movebuf - 1] = 0;
373 ship->file->pcrew = a;
376 ship->file->points = a;
379 ship->specs->qual = a;
382 struct shipspecs *s = ship->specs;
390 ship->specs->rig1 = a;
393 ship->specs->rig2 = a;
396 ship->specs->rig3 = a;
399 ship->specs->rig4 = a;
411 if ((ship->file->sink = a) == 2)
415 ship->file->struck = a;
431 strcpy(ship->file->captain, "begin");
435 *ship->file->captain = 0;
436 ship->file->points = 0;
443 fprintf(stderr, "sync_update: unknown type %d\r\n", type);