[unix-history] / usr / src / games / sail / sync.c

#ifndef lint
static	char *sccsid = "@(#)sync.c	2.5 84/02/23";
#endif

#include "externs.h"
#include <sys/file.h>
#include <sys/errno.h>

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()
{
	(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
		sync_fp = fopen(sync_file, "w+");
		(void) umask(omask);
	} else
		sync_fp = fopen(sync_file, "r+");
	if (sync_fp == 0)
		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()
{
	int (*sig1)(), (*sig2)();
	int n;
	int type, shipnum, isstr, a, b, c, d;
	char buf[80];
	char erred = 0;
	extern errno;

	sig1 = signal(SIGHUP, SIG_IGN);
	sig2 = signal(SIGINT, SIG_IGN);
	for (n = 0; n < 30; n++) {
#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(2);
	}
	if (n >= 30)
		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) fputs(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, sig1);
	(void) signal(SIGINT, sig2);
	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 (isplayer)
			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;
}
Commit	Line	Data
15e30c53	1	#ifndef lint
61aabc59	2	static char *sccsid = "@(#)sync.c 2.5 84/02/23";
15e30c53 EW	3	#endif
	4
	5	#include "externs.h"
61aabc59 EW	6	#include <sys/file.h>
61aabc59 EW	7	#include <sys/errno.h>
15e30c53 EW	8
15e30c53 EW	9	static char sync_buf[BUFSIZE];
0022de6e	10	static char *sync_bp = sync_buf;
15e30c53 EW	11	static char sync_lock[25];
	12	static char sync_file[25];
	13	static long sync_seek;
	14	static FILE *sync_fp;
	15	#define SF "/tmp/#sailsink.%d"
	16	#define LF "/tmp/#saillock.%d"
	17
	18	/VARARGS3/
	19	makesignal(from, fmt, ship, a, b, c)
	20	struct ship *from;
	21	char *fmt;
	22	register struct ship *ship;
	23	{
	24	char message[80];
	25
	26	if (ship == 0)
	27	(void) sprintf(message, fmt, a, b, c);
	28	else
	29	(void) sprintf(message, fmt,
	30	ship->shipname, colours(ship),
	31	sterncolour(ship), a, b, c);
	32	Write(W_SIGNAL, from, 1, (int)message, 0, 0, 0);
	33	}
	34
30d1a80b EW	35	#include <sys/types.h>
30d1a80b EW	36	#include <sys/stat.h>
15e30c53 EW	37	sync_exists(game)
	38	{
	39	char buf[sizeof sync_file];
30d1a80b EW	40	struct stat s;
30d1a80b EW	41	time_t t;
15e30c53 EW	42
15e30c53 EW	43	(void) sprintf(buf, SF, game);
6ca45914	44	(void) time(&t);
30d1a80b EW	45	if (stat(buf, &s) < 0)
	46	return 0;
	47	if (s.st_mtime < t - 60602) { /* 2 hours */
61aabc59 EW	48	(void) unlink(buf);
61aabc59 EW	49	(void) sprintf(buf, LF, game);
6ca45914	50	(void) unlink(buf);
30d1a80b EW	51	return 0;
	52	} else
	53	return 1;
15e30c53 EW	54	}
	55
	56	sync_open()
	57	{
	58	(void) sprintf(sync_lock, LF, game);
	59	(void) sprintf(sync_file, SF, game);
	60	if (access(sync_file, 0) < 0) {
	61	int omask;
	62	#ifdef SETUID
	63	omask = umask(077);
	64	#else
	65	omask = umask(011);
	66	#endif
	67	sync_fp = fopen(sync_file, "w+");
	68	(void) umask(omask);
	69	} else
	70	sync_fp = fopen(sync_file, "r+");
	71	if (sync_fp == 0)
	72	return -1;
	73	sync_seek == 0;
9224751f	74	return 0;
15e30c53 EW	75	}
	76
	77	sync_close(remove)
	78	char remove;
	79	{
7cd3d9ac EW	80	if (sync_fp != 0)
7cd3d9ac EW	81	(void) fclose(sync_fp);
15e30c53 EW	82	if (remove)
	83	(void) unlink(sync_file);
	84	}
	85
	86	Write(type, ship, isstr, a, b, c, d)
	87	int type;
	88	struct ship *ship;
	89	char isstr;
	90	int a, b, c, d;
	91	{
	92	if (isstr)
0022de6e	93	(void) sprintf(sync_bp, "%d %d %d %s\n",
6ca45914	94	type, ship->file->index, isstr, a);
15e30c53	95	else
0022de6e	96	(void) sprintf(sync_bp, "%d %d %d %d %d %d %d\n",
6ca45914	97	type, ship->file->index, isstr, a, b, c, d);
0022de6e	98	while (*sync_bp++)
15e30c53	99	;
0022de6e EW	100	sync_bp--;
0022de6e EW	101	if (sync_bp >= &sync_buf[sizeof sync_buf])
15e30c53	102	abort();
61aabc59	103	(void) sync_update(type, ship, a, b, c, d);
15e30c53 EW	104	}
	105
	106	Sync()
	107	{
	108	int (sig1)(), (sig2)();
15e30c53	109	int n;
61aabc59 EW	110	int type, shipnum, isstr, a, b, c, d;
	111	char buf[80];
	112	char erred = 0;
	113	extern errno;
15e30c53 EW	114
	115	sig1 = signal(SIGHUP, SIG_IGN);
	116	sig2 = signal(SIGINT, SIG_IGN);
61aabc59 EW	117	for (n = 0; n < 30; n++) {
	118	#ifdef LOCK_EX
	119	if (flock(fileno(sync_fp), LOCK_EX\|LOCK_NB) >= 0)
	120	break;
	121	if (errno != EWOULDBLOCK)
	122	return -1;
	123	#else
	124	if (link(sync_file, sync_lock) >= 0)
	125	break;
	126	if (errno != EEXIST)
	127	return -1;
	128	#endif
15e30c53	129	sleep(2);
61aabc59 EW	130	}
	131	if (n >= 30)
	132	return -1;
15e30c53	133	(void) fseek(sync_fp, sync_seek, 0);
61aabc59 EW	134	for (;;) {
	135	switch (fscanf(sync_fp, "%d%d%d", &type, &shipnum, &isstr)) {
	136	case 3:
	137	break;
	138	case EOF:
	139	goto out;
	140	default:
	141	goto bad;
	142	}
	143	if (shipnum < 0 \|\| shipnum >= cc->vessels)
	144	goto bad;
	145	if (isstr != 0 && isstr != 1)
	146	goto bad;
15e30c53	147	if (isstr) {
61aabc59	148	register char *p;
15e30c53 EW	149	for (p = buf;;) {
	150	switch (*p++ = getc(sync_fp)) {
	151	case '\n':
	152	p--;
	153	case EOF:
	154	break;
	155	default:
61aabc59 EW	156	if (p >= buf + sizeof buf)
61aabc59 EW	157	p--;
15e30c53 EW	158	continue;
	159	}
	160	break;
	161	}
	162	*p = 0;
	163	for (p = buf; *p == ' '; p++)
	164	;
	165	a = (int)p;
	166	b = c = d = 0;
	167	} else
61aabc59 EW	168	if (fscanf(sync_fp, "%d%d%d%d", &a, &b, &c, &d) != 4)
	169	goto bad;
	170	if (sync_update(type, SHIP(shipnum), a, b, c, d) < 0)
	171	goto bad;
15e30c53	172	}
61aabc59 EW	173	bad:
	174	erred++;
	175	out:
	176	if (!erred && sync_bp != sync_buf) {
15e30c53 EW	177	(void) fseek(sync_fp, 0L, 2);
	178	(void) fputs(sync_buf, sync_fp);
	179	(void) fflush(sync_fp);
0022de6e	180	sync_bp = sync_buf;
15e30c53 EW	181	}
15e30c53 EW	182	sync_seek = ftell(sync_fp);
61aabc59 EW	183	#ifdef LOCK_EX
	184	(void) flock(fileno(sync_fp), LOCK_UN);
	185	#else
15e30c53	186	(void) unlink(sync_lock);
61aabc59	187	#endif
15e30c53 EW	188	(void) signal(SIGHUP, sig1);
15e30c53 EW	189	(void) signal(SIGINT, sig2);
61aabc59	190	return erred ? -1 : 0;
15e30c53 EW	191	}
	192
	193	sync_update(type, ship, a, b, c, d)
	194	int type;
	195	register struct ship *ship;
	196	int a, b, c, d;
	197	{
	198	switch (type) {
	199	case W_DBP: {
	200	register struct BP *p = &ship->file->DBP[a];
	201	p->turnsent = b;
	202	p->toship = SHIP(c);
	203	p->mensent = d;
	204	break;
	205	}
	206	case W_OBP: {
	207	register struct BP *p = &ship->file->OBP[a];
	208	p->turnsent = b;
	209	p->toship = SHIP(c);
	210	p->mensent = d;
	211	break;
	212	}
	213	case W_FOUL: {
6ca45914 EW	214	register struct snag *p = &ship->file->foul[a];
	215	if (SHIP(a)->file->dir == 0)
	216	break;
	217	if (p->sn_count++ == 0)
	218	p->sn_turn = turn;
	219	ship->file->nfoul++;
15e30c53 EW	220	break;
	221	}
	222	case W_GRAP: {
6ca45914 EW	223	register struct snag *p = &ship->file->grap[a];
	224	if (SHIP(a)->file->dir == 0)
	225	break;
	226	if (p->sn_count++ == 0)
	227	p->sn_turn = turn;
	228	ship->file->ngrap++;
	229	break;
	230	}
	231	case W_UNFOUL: {
	232	register struct snag *p = &ship->file->foul[a];
	233	if (p->sn_count > 0)
	234	if (b) {
	235	ship->file->nfoul -= p->sn_count;
	236	p->sn_count = 0;
	237	} else {
	238	ship->file->nfoul--;
	239	p->sn_count--;
	240	}
	241	break;
	242	}
	243	case W_UNGRAP: {
	244	register struct snag *p = &ship->file->grap[a];
	245	if (p->sn_count > 0)
	246	if (b) {
	247	ship->file->ngrap -= p->sn_count;
	248	p->sn_count = 0;
	249	} else {
	250	ship->file->ngrap--;
	251	p->sn_count--;
	252	}
15e30c53 EW	253	break;
	254	}
	255	case W_SIGNAL:
6ca45914	256	if (isplayer)
fe0cae24	257	Signal("\7%s (%c%c): %s", ship, a);
15e30c53 EW	258	break;
	259	case W_CREW: {
	260	register struct shipspecs *s = ship->specs;
	261	s->crew1 = a;
	262	s->crew2 = b;
	263	s->crew3 = c;
	264	break;
	265	}
	266	case W_CAPTAIN:
	267	(void) strncpy(ship->file->captain, (char *)a,
	268	sizeof ship->file->captain - 1);
	269	ship->file->captain[sizeof ship->file->captain - 1] = 0;
	270	break;
	271	case W_CAPTURED:
66e5ed8a EW	272	if (a < 0)
	273	ship->file->captured = 0;
	274	else
	275	ship->file->captured = SHIP(a);
15e30c53 EW	276	break;
	277	case W_CLASS:
	278	ship->specs->class = a;
	279	break;
	280	case W_DRIFT:
	281	ship->file->drift = a;
	282	break;
	283	case W_EXPLODE:
	284	if ((ship->file->explode = a) == 2)
	285	ship->file->dir = 0;
	286	break;
	287	case W_FS:
	288	ship->file->FS = a;
	289	break;
	290	case W_GUNL: {
	291	register struct shipspecs *s = ship->specs;
	292	s->gunL = a;
	293	s->carL = b;
	294	break;
	295	}
	296	case W_GUNR: {
	297	register struct shipspecs *s = ship->specs;
	298	s->gunR = a;
	299	s->carR = b;
	300	break;
	301	}
	302	case W_HULL:
	303	ship->specs->hull = a;
	304	break;
6ca45914 EW	305	case W_MOVE:
	306	(void) strncpy(ship->file->movebuf, (char *)a,
	307	sizeof ship->file->movebuf - 1);
	308	ship->file->movebuf[sizeof ship->file->movebuf - 1] = 0;
15e30c53 EW	309	break;
	310	case W_PCREW:
	311	ship->file->pcrew = a;
	312	break;
	313	case W_POINTS:
	314	ship->file->points = a;
	315	break;
	316	case W_QUAL:
	317	ship->specs->qual = a;
	318	break;
	319	case W_RIGG: {
	320	register struct shipspecs *s = ship->specs;
	321	s->rig1 = a;
	322	s->rig2 = b;
	323	s->rig3 = c;
	324	s->rig4 = d;
	325	break;
	326	}
	327	case W_RIG1:
	328	ship->specs->rig1 = a;
	329	break;
	330	case W_RIG2:
	331	ship->specs->rig2 = a;
	332	break;
	333	case W_RIG3:
	334	ship->specs->rig3 = a;
	335	break;
	336	case W_RIG4:
	337	ship->specs->rig4 = a;
	338	break;
6ca45914	339	case W_COL:
15e30c53 EW	340	ship->file->col = a;
15e30c53 EW	341	break;
6ca45914	342	case W_DIR:
15e30c53 EW	343	ship->file->dir = a;
15e30c53 EW	344	break;
6ca45914	345	case W_ROW:
15e30c53 EW	346	ship->file->row = a;
	347	break;
	348	case W_SINK:
	349	if ((ship->file->sink = a) == 2)
	350	ship->file->dir = 0;
	351	break;
	352	case W_STRUCK:
	353	ship->file->struck = a;
	354	break;
	355	case W_TA:
	356	ship->specs->ta = a;
	357	break;
	358	case W_ALIVE:
	359	alive = 1;
	360	break;
	361	case W_TURN:
	362	turn = a;
	363	break;
	364	case W_WIND:
	365	winddir = a;
	366	windspeed = b;
	367	break;
	368	case W_BEGIN:
	369	(void) strcpy(ship->file->captain, "begin");
	370	people++;
	371	break;
	372	case W_END:
61aabc59 EW	373	*ship->file->captain = 0;
61aabc59 EW	374	ship->file->points = 0;
15e30c53 EW	375	people--;
15e30c53 EW	376	break;
61aabc59 EW	377	case W_DDEAD:
61aabc59 EW	378	hasdriver = 0;
15e30c53	379	break;
61aabc59 EW	380	default:
	381	fprintf(stderr, "sync_update: unknown type %d\r\n", type);
	382	return -1;
15e30c53	383	}
61aabc59	384	return 0;
15e30c53	385	}