503 lines
10 KiB
C
503 lines
10 KiB
C
/* $NetBSD: sync.c,v 1.20 2001/02/05 01:10:11 christos Exp $ */
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)sync.c 8.2 (Berkeley) 4/28/95";
|
|
#else
|
|
__RCSID("$NetBSD: sync.c,v 1.20 2001/02/05 01:10:11 christos Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#include "extern.h"
|
|
#include "pathnames.h"
|
|
|
|
#define BUFSIZE 4096
|
|
|
|
static int sync_update(int, struct ship *, const char *, long, long, long, long);
|
|
|
|
static const char SF[] = _PATH_SYNC;
|
|
static const char LF[] = _PATH_LOCK;
|
|
static char sync_buf[BUFSIZE];
|
|
static char *sync_bp = sync_buf;
|
|
static char sync_lock[sizeof SF];
|
|
static char sync_file[sizeof LF];
|
|
static long sync_seek;
|
|
static FILE *sync_fp;
|
|
|
|
void
|
|
fmtship(char *buf, size_t len, const char *fmt, struct ship *ship)
|
|
{
|
|
while (*fmt) {
|
|
if (len-- == 0) {
|
|
*buf = '\0';
|
|
return;
|
|
}
|
|
if (*fmt == '$' && fmt[1] == '$') {
|
|
size_t l = snprintf(buf, len, "%s (%c%c)",
|
|
ship->shipname, colours(ship), sterncolour(ship));
|
|
buf += l;
|
|
len -= l - 1;
|
|
fmt += 2;
|
|
}
|
|
else
|
|
*buf++ = *fmt++;
|
|
}
|
|
|
|
if (len > 0)
|
|
*buf = '\0';
|
|
}
|
|
|
|
|
|
/*VARARGS3*/
|
|
void
|
|
makesignal(struct ship *from, const char *fmt, struct ship *ship, ...)
|
|
{
|
|
char message[BUFSIZ];
|
|
char format[BUFSIZ];
|
|
va_list ap;
|
|
|
|
va_start(ap, ship);
|
|
fmtship(format, sizeof(format), fmt, ship);
|
|
vsprintf(message, format, ap);
|
|
va_end(ap);
|
|
Writestr(W_SIGNAL, from, message);
|
|
}
|
|
|
|
/*VARARGS2*/
|
|
void
|
|
makemsg(struct ship *from, const char *fmt, ...)
|
|
{
|
|
char message[BUFSIZ];
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vsprintf(message, fmt, ap);
|
|
va_end(ap);
|
|
Writestr(W_SIGNAL, from, message);
|
|
}
|
|
|
|
int
|
|
sync_exists(int game)
|
|
{
|
|
char buf[sizeof sync_file];
|
|
struct stat s;
|
|
time_t t;
|
|
|
|
sprintf(buf, SF, game);
|
|
time(&t);
|
|
setegid(egid);
|
|
if (stat(buf, &s) < 0) {
|
|
setegid(gid);
|
|
return 0;
|
|
}
|
|
if (s.st_mtime < t - 60*60*2) { /* 2 hours */
|
|
unlink(buf);
|
|
sprintf(buf, LF, game);
|
|
unlink(buf);
|
|
setegid(gid);
|
|
return 0;
|
|
} else {
|
|
setegid(gid);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
int
|
|
sync_open(void)
|
|
{
|
|
struct stat tmp;
|
|
if (sync_fp != NULL)
|
|
fclose(sync_fp);
|
|
sprintf(sync_lock, LF, game);
|
|
sprintf(sync_file, SF, game);
|
|
setegid(egid);
|
|
if (stat(sync_file, &tmp) < 0) {
|
|
mode_t omask = umask(002);
|
|
sync_fp = fopen(sync_file, "w+");
|
|
umask(omask);
|
|
} else
|
|
sync_fp = fopen(sync_file, "r+");
|
|
setegid(gid);
|
|
if (sync_fp == NULL)
|
|
return -1;
|
|
sync_seek = 0;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
sync_close(int remove)
|
|
{
|
|
if (sync_fp != 0)
|
|
fclose(sync_fp);
|
|
if (remove) {
|
|
setegid(egid);
|
|
unlink(sync_file);
|
|
setegid(gid);
|
|
}
|
|
}
|
|
|
|
void
|
|
Write(int type, struct ship *ship, long a, long b, long c, long d)
|
|
{
|
|
|
|
sprintf(sync_bp, "%d %d 0 %ld %ld %ld %ld\n",
|
|
type, ship->file->index, a, b, c, d);
|
|
while (*sync_bp++)
|
|
;
|
|
sync_bp--;
|
|
if (sync_bp >= &sync_buf[sizeof sync_buf])
|
|
abort();
|
|
sync_update(type, ship, NULL, a, b, c, d);
|
|
}
|
|
|
|
void
|
|
Writestr(int type, struct ship *ship, const char *a)
|
|
{
|
|
sprintf(sync_bp, "%d %d 1 %s\n", type, ship->file->index, a);
|
|
while (*sync_bp++)
|
|
;
|
|
sync_bp--;
|
|
if (sync_bp >= &sync_buf[sizeof sync_buf])
|
|
abort();
|
|
sync_update(type, ship, a, 0, 0, 0, 0);
|
|
}
|
|
|
|
int
|
|
Sync(void)
|
|
{
|
|
sig_t sighup, sigint;
|
|
int n;
|
|
int type, shipnum, isstr;
|
|
char *astr;
|
|
long a, b, c, d;
|
|
char buf[80];
|
|
char erred = 0;
|
|
|
|
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
|
|
setegid(egid);
|
|
if (link(sync_file, sync_lock) >= 0) {
|
|
setegid(gid);
|
|
break;
|
|
}
|
|
setegid(gid);
|
|
if (errno != EEXIST)
|
|
return -1;
|
|
#endif
|
|
sleep(1);
|
|
}
|
|
if (n <= 0)
|
|
return -1;
|
|
fseek(sync_fp, sync_seek, SEEK_SET);
|
|
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) {
|
|
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++)
|
|
;
|
|
astr = p;
|
|
a = b = c = d = 0;
|
|
} else {
|
|
if (fscanf(sync_fp, "%ld%ld%ld%ld", &a, &b, &c, &d) != 4)
|
|
goto bad;
|
|
astr = NULL;
|
|
}
|
|
if (sync_update(type, SHIP(shipnum), astr, a, b, c, d) < 0)
|
|
goto bad;
|
|
}
|
|
bad:
|
|
erred++;
|
|
out:
|
|
if (!erred && sync_bp != sync_buf) {
|
|
fseek(sync_fp, 0L, SEEK_END);
|
|
fwrite(sync_buf, sizeof *sync_buf, sync_bp - sync_buf,
|
|
sync_fp);
|
|
fflush(sync_fp);
|
|
sync_bp = sync_buf;
|
|
}
|
|
sync_seek = ftell(sync_fp);
|
|
#ifdef LOCK_EX
|
|
flock(fileno(sync_fp), LOCK_UN);
|
|
#else
|
|
setegid(egid);
|
|
unlink(sync_lock);
|
|
setegid(gid);
|
|
#endif
|
|
signal(SIGHUP, sighup);
|
|
signal(SIGINT, sigint);
|
|
return erred ? -1 : 0;
|
|
}
|
|
|
|
static int
|
|
sync_update(int type, struct ship *ship, const char *astr, long a, long b, long c, long d)
|
|
{
|
|
switch (type) {
|
|
case W_DBP: {
|
|
struct BP *p = &ship->file->DBP[a];
|
|
p->turnsent = b;
|
|
p->toship = SHIP(c);
|
|
p->mensent = d;
|
|
break;
|
|
}
|
|
case W_OBP: {
|
|
struct BP *p = &ship->file->OBP[a];
|
|
p->turnsent = b;
|
|
p->toship = SHIP(c);
|
|
p->mensent = d;
|
|
break;
|
|
}
|
|
case W_FOUL: {
|
|
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: {
|
|
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: {
|
|
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: {
|
|
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("$$: %s", ship, astr);
|
|
else
|
|
Signal("\7$$: %s", ship, astr);
|
|
}
|
|
break;
|
|
case W_CREW: {
|
|
struct shipspecs *s = ship->specs;
|
|
s->crew1 = a;
|
|
s->crew2 = b;
|
|
s->crew3 = c;
|
|
break;
|
|
}
|
|
case W_CAPTAIN:
|
|
strncpy(ship->file->captain, astr,
|
|
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: {
|
|
struct shipspecs *s = ship->specs;
|
|
s->gunL = a;
|
|
s->carL = b;
|
|
break;
|
|
}
|
|
case W_GUNR: {
|
|
struct shipspecs *s = ship->specs;
|
|
s->gunR = a;
|
|
s->carR = b;
|
|
break;
|
|
}
|
|
case W_HULL:
|
|
ship->specs->hull = a;
|
|
break;
|
|
case W_MOVE:
|
|
strncpy(ship->file->movebuf, astr,
|
|
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: {
|
|
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:
|
|
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;
|
|
}
|