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
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 1.3 2005/04/29 09:22:57 joerg 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"
54 makesignal(from, fmt, ship, a, b, c)
62 (void) sprintf(message, fmt, a, b, c);
64 (void) sprintf(message, fmt,
65 ship->shipname, colours(ship),
66 sterncolour(ship), a, b, c);
67 Write(W_SIGNAL, from, 1, (long)message, 0, 0, 0);
70 #include <sys/types.h>
75 char buf[sizeof sync_file];
79 (void) sprintf(buf, SF, game);
81 if (stat(buf, &s) < 0)
83 if (s.st_mtime < t - 60*60*2) { /* 2 hours */
85 (void) sprintf(buf, LF, game);
95 (void) fclose(sync_fp);
96 (void) sprintf(sync_lock, LF, game);
97 (void) sprintf(sync_file, SF, game);
98 if (access(sync_file, 0) < 0) {
99 int omask = umask(issetuid ? 077 : 011);
100 sync_fp = fopen(sync_file, "w+");
103 sync_fp = fopen(sync_file, "r+");
114 (void) fclose(sync_fp);
116 (void) unlink(sync_file);
119 Write(type, ship, isstr, a, b, c, d)
126 (void) sprintf(sync_bp, "%d %d %d %s\n",
127 type, ship->file->index, isstr, (char *)a);
129 (void) sprintf(sync_bp, "%d %d %d %d %d %d %d\n",
130 type, ship->file->index, isstr, a, b, c, d);
134 if (sync_bp >= &sync_buf[sizeof sync_buf])
136 (void) sync_update(type, ship, a, b, c, d);
141 sig_t sighup, sigint;
143 int type, shipnum, isstr, a, b, c, d;
146 sighup = signal(SIGHUP, SIG_IGN);
147 sigint = signal(SIGINT, SIG_IGN);
148 for (n = TIMEOUT; --n >= 0;) {
150 if (flock(fileno(sync_fp), LOCK_EX|LOCK_NB) >= 0)
152 if (errno != EWOULDBLOCK)
155 if (link(sync_file, sync_lock) >= 0)
164 (void) fseek(sync_fp, sync_seek, 0);
166 switch (fscanf(sync_fp, "%d%d%d", &type, &shipnum, &isstr)) {
174 if (shipnum < 0 || shipnum >= cc->vessels)
176 if (isstr != 0 && isstr != 1)
181 switch (*p++ = getc(sync_fp)) {
187 if (p >= buf + sizeof buf)
194 for (p = buf; *p == ' '; p++)
199 if (fscanf(sync_fp, "%d%d%d%d", &a, &b, &c, &d) != 4)
201 if (sync_update(type, SHIP(shipnum), a, b, c, d) < 0)
207 if (!erred && sync_bp != sync_buf) {
208 (void) fseek(sync_fp, 0L, 2);
209 (void) fwrite(sync_buf, sizeof *sync_buf, sync_bp - sync_buf,
211 (void) fflush(sync_fp);
214 sync_seek = ftell(sync_fp);
216 (void) flock(fileno(sync_fp), LOCK_UN);
218 (void) unlink(sync_lock);
220 (void) signal(SIGHUP, sighup);
221 (void) signal(SIGINT, sigint);
222 return erred ? -1 : 0;
225 sync_update(type, ship, a, b, c, d)
232 struct BP *p = &ship->file->DBP[a];
239 struct BP *p = &ship->file->OBP[a];
246 struct snag *p = &ship->file->foul[a];
247 if (SHIP(a)->file->dir == 0)
249 if (p->sn_count++ == 0)
255 struct snag *p = &ship->file->grap[a];
256 if (SHIP(a)->file->dir == 0)
258 if (p->sn_count++ == 0)
264 struct snag *p = &ship->file->foul[a];
265 if (p->sn_count > 0) {
267 ship->file->nfoul -= p->sn_count;
277 struct snag *p = &ship->file->grap[a];
278 if (p->sn_count > 0) {
280 ship->file->ngrap -= p->sn_count;
290 if (mode == MODE_PLAYER) {
292 Signal("%s (%c%c): %s", ship, a);
294 Signal("\7%s (%c%c): %s", ship, a);
298 struct shipspecs *s = ship->specs;
305 (void) strncpy(ship->file->captain, (char *)a,
306 sizeof ship->file->captain - 1);
307 ship->file->captain[sizeof ship->file->captain - 1] = 0;
311 ship->file->captured = 0;
313 ship->file->captured = SHIP(a);
316 ship->specs->class = a;
319 ship->file->drift = a;
322 if ((ship->file->explode = a) == 2)
329 struct shipspecs *s = ship->specs;
335 struct shipspecs *s = ship->specs;
341 ship->specs->hull = a;
344 (void) strncpy(ship->file->movebuf, (char *)a,
345 sizeof ship->file->movebuf - 1);
346 ship->file->movebuf[sizeof ship->file->movebuf - 1] = 0;
349 ship->file->pcrew = a;
352 ship->file->points = a;
355 ship->specs->qual = a;
358 struct shipspecs *s = ship->specs;
366 ship->specs->rig1 = a;
369 ship->specs->rig2 = a;
372 ship->specs->rig3 = a;
375 ship->specs->rig4 = a;
387 if ((ship->file->sink = a) == 2)
391 ship->file->struck = a;
407 (void) strcpy(ship->file->captain, "begin");
411 *ship->file->captain = 0;
412 ship->file->points = 0;
419 fprintf(stderr, "sync_update: unknown type %d\r\n", type);