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-rw-r--r--games/sail/sync.c421
1 files changed, 421 insertions, 0 deletions
diff --git a/games/sail/sync.c b/games/sail/sync.c
new file mode 100644
index 0000000..ca56e23
--- /dev/null
+++ b/games/sail/sync.c
@@ -0,0 +1,421 @@
+/*
+ * Copyright (c) 1983, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)sync.c 8.1 (Berkeley) 5/31/93";
+#endif /* not lint */
+
+#include "externs.h"
+#include <sys/file.h>
+#include <sys/errno.h>
+
+#define BUFSIZE 4096
+
+static char sync_buf[BUFSIZE];
+static char *sync_bp = sync_buf;
+static char sync_lock[25];
+static char sync_file[25];
+static long sync_seek;
+static FILE *sync_fp;
+#define SF "/tmp/#sailsink.%d"
+#define LF "/tmp/#saillock.%d"
+
+/*VARARGS3*/
+makesignal(from, fmt, ship, a, b, c)
+ struct ship *from;
+ char *fmt;
+ register struct ship *ship;
+{
+ char message[80];
+
+ if (ship == 0)
+ (void) sprintf(message, fmt, a, b, c);
+ else
+ (void) sprintf(message, fmt,
+ ship->shipname, colours(ship),
+ sterncolour(ship), a, b, c);
+ Write(W_SIGNAL, from, 1, (int)message, 0, 0, 0);
+}
+
+#include <sys/types.h>
+#include <sys/stat.h>
+sync_exists(game)
+{
+ char buf[sizeof sync_file];
+ struct stat s;
+ time_t t;
+
+ (void) sprintf(buf, SF, game);
+ (void) time(&t);
+ if (stat(buf, &s) < 0)
+ return 0;
+ if (s.st_mtime < t - 60*60*2) { /* 2 hours */
+ (void) unlink(buf);
+ (void) sprintf(buf, LF, game);
+ (void) unlink(buf);
+ return 0;
+ } else
+ return 1;
+}
+
+sync_open()
+{
+ if (sync_fp != NULL)
+ (void) fclose(sync_fp);
+ (void) sprintf(sync_lock, LF, game);
+ (void) sprintf(sync_file, SF, game);
+ if (access(sync_file, 0) < 0) {
+ int omask = umask(issetuid ? 077 : 011);
+ sync_fp = fopen(sync_file, "w+");
+ (void) umask(omask);
+ } else
+ sync_fp = fopen(sync_file, "r+");
+ if (sync_fp == NULL)
+ return -1;
+ sync_seek = 0;
+ return 0;
+}
+
+sync_close(remove)
+ char remove;
+{
+ if (sync_fp != 0)
+ (void) fclose(sync_fp);
+ if (remove)
+ (void) unlink(sync_file);
+}
+
+Write(type, ship, isstr, a, b, c, d)
+ int type;
+ struct ship *ship;
+ char isstr;
+ int a, b, c, d;
+{
+ if (isstr)
+ (void) sprintf(sync_bp, "%d %d %d %s\n",
+ type, ship->file->index, isstr, a);
+ else
+ (void) sprintf(sync_bp, "%d %d %d %d %d %d %d\n",
+ type, ship->file->index, isstr, a, b, c, d);
+ while (*sync_bp++)
+ ;
+ sync_bp--;
+ if (sync_bp >= &sync_buf[sizeof sync_buf])
+ abort();
+ (void) sync_update(type, ship, a, b, c, d);
+}
+
+Sync()
+{
+ sig_t sighup, sigint;
+ register n;
+ int type, shipnum, isstr, a, b, c, d;
+ char buf[80];
+ char erred = 0;
+ extern errno;
+
+ sighup = signal(SIGHUP, SIG_IGN);
+ sigint = signal(SIGINT, SIG_IGN);
+ for (n = TIMEOUT; --n >= 0;) {
+#ifdef LOCK_EX
+ if (flock(fileno(sync_fp), LOCK_EX|LOCK_NB) >= 0)
+ break;
+ if (errno != EWOULDBLOCK)
+ return -1;
+#else
+ if (link(sync_file, sync_lock) >= 0)
+ break;
+ if (errno != EEXIST)
+ return -1;
+#endif
+ sleep(1);
+ }
+ if (n <= 0)
+ return -1;
+ (void) fseek(sync_fp, sync_seek, 0);
+ for (;;) {
+ switch (fscanf(sync_fp, "%d%d%d", &type, &shipnum, &isstr)) {
+ case 3:
+ break;
+ case EOF:
+ goto out;
+ default:
+ goto bad;
+ }
+ if (shipnum < 0 || shipnum >= cc->vessels)
+ goto bad;
+ if (isstr != 0 && isstr != 1)
+ goto bad;
+ if (isstr) {
+ register char *p;
+ for (p = buf;;) {
+ switch (*p++ = getc(sync_fp)) {
+ case '\n':
+ p--;
+ case EOF:
+ break;
+ default:
+ if (p >= buf + sizeof buf)
+ p--;
+ continue;
+ }
+ break;
+ }
+ *p = 0;
+ for (p = buf; *p == ' '; p++)
+ ;
+ a = (int)p;
+ b = c = d = 0;
+ } else
+ if (fscanf(sync_fp, "%d%d%d%d", &a, &b, &c, &d) != 4)
+ goto bad;
+ if (sync_update(type, SHIP(shipnum), a, b, c, d) < 0)
+ goto bad;
+ }
+bad:
+ erred++;
+out:
+ if (!erred && sync_bp != sync_buf) {
+ (void) fseek(sync_fp, 0L, 2);
+ (void) fwrite(sync_buf, sizeof *sync_buf, sync_bp - sync_buf,
+ sync_fp);
+ (void) fflush(sync_fp);
+ sync_bp = sync_buf;
+ }
+ sync_seek = ftell(sync_fp);
+#ifdef LOCK_EX
+ (void) flock(fileno(sync_fp), LOCK_UN);
+#else
+ (void) unlink(sync_lock);
+#endif
+ (void) signal(SIGHUP, sighup);
+ (void) signal(SIGINT, sigint);
+ return erred ? -1 : 0;
+}
+
+sync_update(type, ship, a, b, c, d)
+ int type;
+ register struct ship *ship;
+ int a, b, c, d;
+{
+ switch (type) {
+ case W_DBP: {
+ register struct BP *p = &ship->file->DBP[a];
+ p->turnsent = b;
+ p->toship = SHIP(c);
+ p->mensent = d;
+ break;
+ }
+ case W_OBP: {
+ register struct BP *p = &ship->file->OBP[a];
+ p->turnsent = b;
+ p->toship = SHIP(c);
+ p->mensent = d;
+ break;
+ }
+ case W_FOUL: {
+ register struct snag *p = &ship->file->foul[a];
+ if (SHIP(a)->file->dir == 0)
+ break;
+ if (p->sn_count++ == 0)
+ p->sn_turn = turn;
+ ship->file->nfoul++;
+ break;
+ }
+ case W_GRAP: {
+ register struct snag *p = &ship->file->grap[a];
+ if (SHIP(a)->file->dir == 0)
+ break;
+ if (p->sn_count++ == 0)
+ p->sn_turn = turn;
+ ship->file->ngrap++;
+ break;
+ }
+ case W_UNFOUL: {
+ register struct snag *p = &ship->file->foul[a];
+ if (p->sn_count > 0)
+ if (b) {
+ ship->file->nfoul -= p->sn_count;
+ p->sn_count = 0;
+ } else {
+ ship->file->nfoul--;
+ p->sn_count--;
+ }
+ break;
+ }
+ case W_UNGRAP: {
+ register struct snag *p = &ship->file->grap[a];
+ if (p->sn_count > 0)
+ if (b) {
+ ship->file->ngrap -= p->sn_count;
+ p->sn_count = 0;
+ } else {
+ ship->file->ngrap--;
+ p->sn_count--;
+ }
+ break;
+ }
+ case W_SIGNAL:
+ if (mode == MODE_PLAYER)
+ if (nobells)
+ Signal("%s (%c%c): %s", ship, a);
+ else
+ Signal("\7%s (%c%c): %s", ship, a);
+ break;
+ case W_CREW: {
+ register struct shipspecs *s = ship->specs;
+ s->crew1 = a;
+ s->crew2 = b;
+ s->crew3 = c;
+ break;
+ }
+ case W_CAPTAIN:
+ (void) strncpy(ship->file->captain, (char *)a,
+ sizeof ship->file->captain - 1);
+ ship->file->captain[sizeof ship->file->captain - 1] = 0;
+ break;
+ case W_CAPTURED:
+ if (a < 0)
+ ship->file->captured = 0;
+ else
+ ship->file->captured = SHIP(a);
+ break;
+ case W_CLASS:
+ ship->specs->class = a;
+ break;
+ case W_DRIFT:
+ ship->file->drift = a;
+ break;
+ case W_EXPLODE:
+ if ((ship->file->explode = a) == 2)
+ ship->file->dir = 0;
+ break;
+ case W_FS:
+ ship->file->FS = a;
+ break;
+ case W_GUNL: {
+ register struct shipspecs *s = ship->specs;
+ s->gunL = a;
+ s->carL = b;
+ break;
+ }
+ case W_GUNR: {
+ register struct shipspecs *s = ship->specs;
+ s->gunR = a;
+ s->carR = b;
+ break;
+ }
+ case W_HULL:
+ ship->specs->hull = a;
+ break;
+ case W_MOVE:
+ (void) strncpy(ship->file->movebuf, (char *)a,
+ sizeof ship->file->movebuf - 1);
+ ship->file->movebuf[sizeof ship->file->movebuf - 1] = 0;
+ break;
+ case W_PCREW:
+ ship->file->pcrew = a;
+ break;
+ case W_POINTS:
+ ship->file->points = a;
+ break;
+ case W_QUAL:
+ ship->specs->qual = a;
+ break;
+ case W_RIGG: {
+ register struct shipspecs *s = ship->specs;
+ s->rig1 = a;
+ s->rig2 = b;
+ s->rig3 = c;
+ s->rig4 = d;
+ break;
+ }
+ case W_RIG1:
+ ship->specs->rig1 = a;
+ break;
+ case W_RIG2:
+ ship->specs->rig2 = a;
+ break;
+ case W_RIG3:
+ ship->specs->rig3 = a;
+ break;
+ case W_RIG4:
+ ship->specs->rig4 = a;
+ break;
+ case W_COL:
+ ship->file->col = a;
+ break;
+ case W_DIR:
+ ship->file->dir = a;
+ break;
+ case W_ROW:
+ ship->file->row = a;
+ break;
+ case W_SINK:
+ if ((ship->file->sink = a) == 2)
+ ship->file->dir = 0;
+ break;
+ case W_STRUCK:
+ ship->file->struck = a;
+ break;
+ case W_TA:
+ ship->specs->ta = a;
+ break;
+ case W_ALIVE:
+ alive = 1;
+ break;
+ case W_TURN:
+ turn = a;
+ break;
+ case W_WIND:
+ winddir = a;
+ windspeed = b;
+ break;
+ case W_BEGIN:
+ (void) strcpy(ship->file->captain, "begin");
+ people++;
+ break;
+ case W_END:
+ *ship->file->captain = 0;
+ ship->file->points = 0;
+ people--;
+ break;
+ case W_DDEAD:
+ hasdriver = 0;
+ break;
+ default:
+ fprintf(stderr, "sync_update: unknown type %d\r\n", type);
+ return -1;
+ }
+ return 0;
+}
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