X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/6f38c952b7128da97a7d4b52b68a82a01d53d242..fd88f5c5678c80ff5e338adc372d28a52ad20530:/usr/src/games/sail/sync.c

diff --git a/usr/src/games/sail/sync.c b/usr/src/games/sail/sync.c
index 57e4cf070e..8f8dc7dbb9 100644
--- a/usr/src/games/sail/sync.c
+++ b/usr/src/games/sail/sync.c
@@ -1,11 +1,48 @@
+/*
+ * 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	1.2 83/10/14";
-#endif
+static char sccsid[] = "@(#)sync.c	8.2 (Berkeley) 4/28/95";
+#endif /* not lint */
+
+#include <sys/file.h>
+#include <errno.h>
+#include "extern.h"
 
-#include "externs.h"
+#define BUFSIZE 4096
 
 static char sync_buf[BUFSIZE];
-static char *sync_bufp = sync_buf;
+static char *sync_bp = sync_buf;
 static char sync_lock[25];
 static char sync_file[25];
 static long sync_seek;
@@ -15,9 +52,9 @@ static FILE *sync_fp;
 
 /*VARARGS3*/
 makesignal(from, fmt, ship, a, b, c)
-struct ship *from;
-char *fmt;
-register struct ship *ship;
+	struct ship *from;
+	char *fmt;
+	register struct ship *ship;
 {
 	char message[80];
 
@@ -30,77 +67,117 @@ register struct ship *ship;
 	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);
-	return access(buf, 0) >= 0;
+	(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;
-#ifdef SETUID
-		omask = umask(077);
-#else
-		omask = umask(011);
-#endif
+		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 == 0)
+	if (sync_fp == NULL)
 		return -1;
-	sync_seek == 0;
+	sync_seek = 0;
+	return 0;
 }
 
 sync_close(remove)
-char remove;
+	char remove;
 {
-	(void) fclose(sync_fp);
+	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;
+	int type;
+	struct ship *ship;
+	char isstr;
+	int a, b, c, d;
 {
 	if (isstr)
-		(void) sprintf(sync_bufp, "%d %d %d %s\n",
-			type, ship-SHIP(0), isstr, a);
+		(void) sprintf(sync_bp, "%d %d %d %s\n",
+			type, ship->file->index, isstr, a);
 	else
-		(void) sprintf(sync_bufp, "%d %d %d %d %d %d %d\n",
-			type, ship-SHIP(0), isstr, a, b, c, d);
-	while (*sync_bufp++)
+		(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_bufp--;
-	if (sync_bufp >= &sync_buf[sizeof sync_buf])
+	sync_bp--;
+	if (sync_bp >= &sync_buf[sizeof sync_buf])
 		abort();
-	sync_update(type, ship, a, b, c, d);
+	(void) sync_update(type, ship, a, b, c, d);
 }
 
 Sync()
 {
-	int (*sig1)(), (*sig2)();
+	sig_t sighup, sigint;
+	register n;
 	int type, shipnum, isstr, a, b, c, d;
-	char buf[60];
-	register char *p = buf;
-	int n;
+	char buf[80];
+	char erred = 0;
+	extern errno;
 
-	sig1 = signal(SIGHUP, SIG_IGN);
-	sig2 = signal(SIGINT, SIG_IGN);
-	for (n = 0; link(sync_file, sync_lock) < 0 && n < 30; n++)
-		sleep(2);
+	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);
-	while (fscanf(sync_fp, "%d%d%d", &type, &shipnum, &isstr) != EOF) {
+	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':
@@ -108,6 +185,8 @@ Sync()
 				case EOF:
 					break;
 				default:
+					if (p >= buf + sizeof buf)
+						p--;
 					continue;
 				}
 				break;
@@ -118,25 +197,36 @@ Sync()
 			a = (int)p;
 			b = c = d = 0;
 		} else
-			(void) fscanf(sync_fp, "%d%d%d%d", &a, &b, &c, &d);
-		sync_update(type, SHIP(shipnum), a, b, c, d);
+			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;
 	}
-	if (sync_bufp != sync_buf) {
+bad:
+	erred++;
+out:
+	if (!erred && sync_bp != sync_buf) {
 		(void) fseek(sync_fp, 0L, 2);
-		(void) fputs(sync_buf, sync_fp);
+		(void) fwrite(sync_buf, sizeof *sync_buf, sync_bp - sync_buf,
+			sync_fp);
 		(void) fflush(sync_fp);
-		sync_bufp = sync_buf;
+		sync_bp = sync_buf;
 	}
 	sync_seek = ftell(sync_fp);
+#ifdef LOCK_EX
+	(void) flock(fileno(sync_fp), LOCK_UN);
+#else
 	(void) unlink(sync_lock);
-	(void) signal(SIGHUP, sig1);
-	(void) signal(SIGINT, sig2);
+#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;
+	int type;
+	register struct ship *ship;
+	int a, b, c, d;
 {
 	switch (type) {
 	case W_DBP: {
@@ -154,27 +244,53 @@ int a, b, c, d;
 		break;
 		}
 	case W_FOUL: {
-		register struct snag *p = &ship->file->fouls[a];
-		p->turnfoul = b;
-		p->toship = SHIP(c);
+		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->grapples[a];
-		p->turnfoul = b;
-		p->toship = SHIP(c);
+		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:
-		/*
-		(void) putchar('\7');
-		*/
-		Signal("%s (%c%c): %s", ship, a);
-		/*
-		(void) strncpy(ship->file->signal, (char *)a,
-			sizeof ship->file->signal - 1);
-		ship->file->signal[sizeof ship->file->signal - 1] = 0;
-		*/
+		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;
@@ -189,7 +305,10 @@ int a, b, c, d;
 		ship->file->captain[sizeof ship->file->captain - 1] = 0;
 		break;
 	case W_CAPTURED:
-		ship->file->captured = SHIP(a);
+		if (a < 0)
+			ship->file->captured = 0;
+		else
+			ship->file->captured = SHIP(a);
 		break;
 	case W_CLASS:
 		ship->specs->class = a;
@@ -219,10 +338,10 @@ int a, b, c, d;
 	case W_HULL:
 		ship->specs->hull = a;
 		break;
-	case W_LAST:
-		(void) strncpy(ship->file->last, (char *)a,
-			sizeof ship->file->last - 1);
-		ship->file->last[sizeof ship->file->last - 1] = 0;
+	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;
@@ -253,13 +372,13 @@ int a, b, c, d;
 	case W_RIG4:
 		ship->specs->rig4 = a;
 		break;
-	case W_SHIPCOL:
+	case W_COL:
 		ship->file->col = a;
 		break;
-	case W_SHIPDIR:
+	case W_DIR:
 		ship->file->dir = a;
 		break;
-	case W_SHIPROW:
+	case W_ROW:
 		ship->file->row = a;
 		break;
 	case W_SINK:
@@ -287,11 +406,16 @@ int a, b, c, d;
 		people++;
 		break;
 	case W_END:
-		(void) strcpy(ship->file->captain, "");
+		*ship->file->captain = 0;
+		ship->file->points = 0;
 		people--;
 		break;
-	default:
-		fprintf(stderr, "sync_update: unknown type %d\n", type);
+	case W_DDEAD:
+		hasdriver = 0;
 		break;
+	default:
+		fprintf(stderr, "sync_update: unknown type %d\r\n", type);
+		return -1;
 	}
+	return 0;
 }