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NetBSD/games/sail/sync.c
christos 193b880fad fix unused variable warnings
2013-10-19 17:19:30 +00:00

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/* $NetBSD: sync.c,v 1.34 2013/10/19 17:23:08 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. 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 1.34 2013/10/19 17:23:08 christos Exp $");
#endif
#endif /* not lint */
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.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
/* Message types */
#define W_CAPTAIN 1
#define W_CAPTURED 2
#define W_CLASS 3
#define W_CREW 4
#define W_DBP 5
#define W_DRIFT 6
#define W_EXPLODE 7
/* W_FILE 8 not used */
#define W_FOUL 9
#define W_GUNL 10
#define W_GUNR 11
#define W_HULL 12
#define W_MOVE 13
#define W_OBP 14
#define W_PCREW 15
#define W_UNFOUL 16
#define W_POINTS 17
#define W_QUAL 18
#define W_UNGRAP 19
#define W_RIGG 20
#define W_COL 21
#define W_DIR 22
#define W_ROW 23
#define W_SIGNAL 24
#define W_SINK 25
#define W_STRUCK 26
#define W_TA 27
#define W_ALIVE 28
#define W_TURN 29
#define W_WIND 30
#define W_FS 31
#define W_GRAP 32
#define W_RIG1 33
#define W_RIG2 34
#define W_RIG3 35
#define W_RIG4 36
#define W_BEGIN 37
#define W_END 38
#define W_DDEAD 39
static void recv_captain(struct ship *ship, const char *astr);
static void recv_captured(struct ship *ship, long a);
static void recv_class(struct ship *ship, long a);
static void recv_crew(struct ship *ship, long a, long b, long c);
static void recv_dbp(struct ship *ship, long a, long b, long c, long d);
static void recv_drift(struct ship *ship, long a);
static void recv_explode(struct ship *ship, long a);
static void recv_foul(struct ship *ship, long a);
static void recv_gunl(struct ship *ship, long a, long b);
static void recv_gunr(struct ship *ship, long a, long b);
static void recv_hull(struct ship *ship, long a);
static void recv_move(struct ship *ship, const char *astr);
static void recv_obp(struct ship *ship, long a, long b, long c, long d);
static void recv_pcrew(struct ship *ship, long a);
static void recv_unfoul(struct ship *ship, long a, long b);
static void recv_points(struct ship *ship, long a);
static void recv_qual(struct ship *ship, long a);
static void recv_ungrap(struct ship *ship, long a, long b);
static void recv_rigg(struct ship *ship, long a, long b, long c, long d);
static void recv_col(struct ship *ship, long a);
static void recv_dir(struct ship *ship, long a);
static void recv_row(struct ship *ship, long a);
static void recv_signal(struct ship *ship, const char *astr);
static void recv_sink(struct ship *ship, long a);
static void recv_struck(struct ship *ship, long a);
static void recv_ta(struct ship *ship, long a);
static void recv_alive(void);
static void recv_turn(long a);
static void recv_wind(long a, long b);
static void recv_fs(struct ship *ship, long a);
static void recv_grap(struct ship *ship, long a);
static void recv_rig1(struct ship *ship, long a);
static void recv_rig2(struct ship *ship, long a);
static void recv_rig3(struct ship *ship, long a);
static void recv_rig4(struct ship *ship, long a);
static void recv_begin(struct ship *ship);
static void recv_end(struct ship *ship);
static void recv_ddead(void);
static void Write(int, struct ship *, long, long, long, long);
static void Writestr(int, struct ship *, const char *);
static int sync_update(int, struct ship *, const char *,
long, long, long, long);
static char sync_buf[BUFSIZE];
static char *sync_bp = sync_buf;
static long sync_seek;
static FILE *sync_fp;
static const char *
get_sync_file(int scenario_number)
{
static char sync_file[NAME_MAX];
snprintf(sync_file, sizeof(sync_file), _FILE_SYNC, scenario_number);
return sync_file;
}
static const char *
get_lock_file(int scenario_number)
{
static char sync_lock[NAME_MAX];
snprintf(sync_lock, sizeof(sync_lock), _FILE_LOCK, scenario_number);
return sync_lock;
}
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);
vsnprintf(message, sizeof(message), format, ap);
va_end(ap);
send_signal(from, message);
}
/*VARARGS2*/
void
makemsg(struct ship *from, const char *fmt, ...)
{
char message[BUFSIZ];
va_list ap;
va_start(ap, fmt);
vsnprintf(message, sizeof(message), fmt, ap);
va_end(ap);
send_signal(from, message);
}
int
sync_exists(int gamenum)
{
const char *path;
struct stat s;
time_t t;
path = get_sync_file(gamenum);
time(&t);
setegid(egid);
if (stat(path, &s) < 0) {
setegid(gid);
return 0;
}
if (s.st_mtime < t - 60*60*2) { /* 2 hours */
unlink(path);
path = get_lock_file(gamenum);
unlink(path);
setegid(gid);
return 0;
} else {
setegid(gid);
return 1;
}
}
int
sync_open(void)
{
const char *sync_file;
struct stat tmp;
if (sync_fp != NULL)
fclose(sync_fp);
sync_file = get_sync_file(game);
(void)get_lock_file(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 doremove)
{
const char *sync_file;
if (sync_fp != 0)
fclose(sync_fp);
if (doremove) {
sync_file = get_sync_file(game);
setegid(egid);
unlink(sync_file);
setegid(gid);
}
}
static void
Write(int type, struct ship *ship, long a, long b, long c, long d)
{
size_t max = sizeof(sync_buf) - (sync_bp - sync_buf);
int shipindex = (ship == NULL) ? 0 : ship->file->index;
snprintf(sync_bp, max, "%d %d 0 %ld %ld %ld %ld\n",
type, shipindex, 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);
}
static void
Writestr(int type, struct ship *ship, const char *a)
{
size_t max = sizeof(sync_buf) - (sync_bp - sync_buf);
int shipindex = (ship == NULL) ? 0 : ship->file->index;
snprintf(sync_bp, max, "%d %d 1 %s\n", type, shipindex, 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;
#ifndef LOCK_EX
const char *sync_file;
const char *sync_lock;
#endif
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
sync_file = get_sync_file(game);
sync_lock = get_lock_file(game);
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) {
int ch;
char *p;
for (p = buf;;) {
ch = getc(sync_fp);
*p++ = ch;
switch (ch) {
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_CAPTAIN: recv_captain(ship, astr); break;
case W_CAPTURED: recv_captured(ship, a); break;
case W_CLASS: recv_class(ship, a); break;
case W_CREW: recv_crew(ship, a, b, c); break;
case W_DBP: recv_dbp(ship, a, b, c, d); break;
case W_DRIFT: recv_drift(ship, a); break;
case W_EXPLODE: recv_explode(ship, a); break;
case W_FOUL: recv_foul(ship, a); break;
case W_GUNL: recv_gunl(ship, a, b); break;
case W_GUNR: recv_gunr(ship, a, b); break;
case W_HULL: recv_hull(ship, a); break;
case W_MOVE: recv_move(ship, astr); break;
case W_OBP: recv_obp(ship, a, b, c, d); break;
case W_PCREW: recv_pcrew(ship, a); break;
case W_UNFOUL: recv_unfoul(ship, a, b); break;
case W_POINTS: recv_points(ship, a); break;
case W_QUAL: recv_qual(ship, a); break;
case W_UNGRAP: recv_ungrap(ship, a, b); break;
case W_RIGG: recv_rigg(ship, a, b, c, d); break;
case W_COL: recv_col(ship, a); break;
case W_DIR: recv_dir(ship, a); break;
case W_ROW: recv_row(ship, a); break;
case W_SIGNAL: recv_signal(ship, astr); break;
case W_SINK: recv_sink(ship, a); break;
case W_STRUCK: recv_struck(ship, a); break;
case W_TA: recv_ta(ship, a); break;
case W_ALIVE: recv_alive(); break;
case W_TURN: recv_turn(a); break;
case W_WIND: recv_wind(a, b); break;
case W_FS: recv_fs(ship, a); break;
case W_GRAP: recv_grap(ship, a); break;
case W_RIG1: recv_rig1(ship, a); break;
case W_RIG2: recv_rig2(ship, a); break;
case W_RIG3: recv_rig3(ship, a); break;
case W_RIG4: recv_rig4(ship, a); break;
case W_BEGIN: recv_begin(ship); break;
case W_END: recv_end(ship); break;
case W_DDEAD: recv_ddead(); break;
default:
fprintf(stderr, "sync_update: unknown type %d\r\n", type);
return -1;
}
return 0;
}
/*
* Messages to send
*/
void
send_captain(struct ship *ship, const char *astr)
{
Writestr(W_CAPTAIN, ship, astr);
}
void
send_captured(struct ship *ship, long a)
{
Write(W_CAPTURED, ship, a, 0, 0, 0);
}
void
send_class(struct ship *ship, long a)
{
Write(W_CLASS, ship, a, 0, 0, 0);
}
void
send_crew(struct ship *ship, long a, long b, long c)
{
Write(W_CREW, ship, a, b, c, 0);
}
void
send_dbp(struct ship *ship, long a, long b, long c, long d)
{
Write(W_DBP, ship, a, b, c, d);
}
void
send_drift(struct ship *ship, long a)
{
Write(W_DRIFT, ship, a, 0, 0, 0);
}
void
send_explode(struct ship *ship, long a)
{
Write(W_EXPLODE, ship, a, 0, 0, 0);
}
void
send_foul(struct ship *ship, long a)
{
Write(W_FOUL, ship, a, 0, 0, 0);
}
void
send_gunl(struct ship *ship, long a, long b)
{
Write(W_GUNL, ship, a, b, 0, 0);
}
void
send_gunr(struct ship *ship, long a, long b)
{
Write(W_GUNR, ship, a, b, 0, 0);
}
void
send_hull(struct ship *ship, long a)
{
Write(W_HULL, ship, a, 0, 0, 0);
}
void
send_move(struct ship *ship, const char *astr)
{
Writestr(W_MOVE, ship, astr);
}
void
send_obp(struct ship *ship, long a, long b, long c, long d)
{
Write(W_OBP, ship, a, b, c, d);
}
void
send_pcrew(struct ship *ship, long a)
{
Write(W_PCREW, ship, a, 0, 0, 0);
}
void
send_unfoul(struct ship *ship, long a, long b)
{
Write(W_UNFOUL, ship, a, b, 0, 0);
}
void
send_points(struct ship *ship, long a)
{
Write(W_POINTS, ship, a, 0, 0, 0);
}
void
send_qual(struct ship *ship, long a)
{
Write(W_QUAL, ship, a, 0, 0, 0);
}
void
send_ungrap(struct ship *ship, long a, long b)
{
Write(W_UNGRAP, ship, a, b, 0, 0);
}
void
send_rigg(struct ship *ship, long a, long b, long c, long d)
{
Write(W_RIGG, ship, a, b, c, d);
}
void
send_col(struct ship *ship, long a)
{
Write(W_COL, ship, a, 0, 0, 0);
}
void
send_dir(struct ship *ship, long a)
{
Write(W_DIR, ship, a, 0, 0, 0);
}
void
send_row(struct ship *ship, long a)
{
Write(W_ROW, ship, a, 0, 0, 0);
}
void
send_signal(struct ship *ship, const char *astr)
{
Writestr(W_SIGNAL, ship, astr);
}
void
send_sink(struct ship *ship, long a)
{
Write(W_SINK, ship, a, 0, 0, 0);
}
void
send_struck(struct ship *ship, long a)
{
Write(W_STRUCK, ship, a, 0, 0, 0);
}
void
send_ta(struct ship *ship, long a)
{
Write(W_TA, ship, a, 0, 0, 0);
}
void
send_alive(void)
{
Write(W_ALIVE, NULL, 0, 0, 0, 0);
}
void
send_turn(long a)
{
Write(W_TURN, NULL, a, 0, 0, 0);
}
void
send_wind(long a, long b)
{
Write(W_WIND, NULL, a, b, 0, 0);
}
void
send_fs(struct ship *ship, long a)
{
Write(W_FS, ship, a, 0, 0, 0);
}
void
send_grap(struct ship *ship, long a)
{
Write(W_GRAP, ship, a, 0, 0, 0);
}
void
send_rig1(struct ship *ship, long a)
{
Write(W_RIG1, ship, a, 0, 0, 0);
}
void
send_rig2(struct ship *ship, long a)
{
Write(W_RIG2, ship, a, 0, 0, 0);
}
void
send_rig3(struct ship *ship, long a)
{
Write(W_RIG3, ship, a, 0, 0, 0);
}
void
send_rig4(struct ship *ship, long a)
{
Write(W_RIG4, ship, a, 0, 0, 0);
}
void
send_begin(struct ship *ship)
{
Write(W_BEGIN, ship, 0, 0, 0, 0);
}
void
send_end(struct ship *ship)
{
Write(W_END, ship, 0, 0, 0, 0);
}
void
send_ddead(void)
{
Write(W_DDEAD, NULL, 0, 0, 0, 0);
}
/*
* Actions upon message receipt
*/
static void
recv_captain(struct ship *ship, const char *astr)
{
strlcpy(ship->file->captain, astr, sizeof ship->file->captain);
}
static void
recv_captured(struct ship *ship, long a)
{
if (a < 0)
ship->file->captured = 0;
else
ship->file->captured = SHIP(a);
}
static void
recv_class(struct ship *ship, long a)
{
ship->specs->class = a;
}
static void
recv_crew(struct ship *ship, long a, long b, long c)
{
struct shipspecs *s = ship->specs;
s->crew1 = a;
s->crew2 = b;
s->crew3 = c;
}
static void
recv_dbp(struct ship *ship, long a, long b, long c, long d)
{
struct BP *p = &ship->file->DBP[a];
p->turnsent = b;
p->toship = SHIP(c);
p->mensent = d;
}
static void
recv_drift(struct ship *ship, long a)
{
ship->file->drift = a;
}
static void
recv_explode(struct ship *ship, long a)
{
if ((ship->file->explode = a) == 2)
ship->file->dir = 0;
}
static void
recv_foul(struct ship *ship, long a)
{
struct snag *p = &ship->file->foul[a];
if (SHIP(a)->file->dir == 0)
return;
if (p->sn_count++ == 0)
p->sn_turn = turn;
ship->file->nfoul++;
}
static void
recv_gunl(struct ship *ship, long a, long b)
{
struct shipspecs *s = ship->specs;
s->gunL = a;
s->carL = b;
}
static void
recv_gunr(struct ship *ship, long a, long b)
{
struct shipspecs *s = ship->specs;
s->gunR = a;
s->carR = b;
}
static void
recv_hull(struct ship *ship, long a)
{
ship->specs->hull = a;
}
static void
recv_move(struct ship *ship, const char *astr)
{
strlcpy(ship->file->movebuf, astr, sizeof ship->file->movebuf);
}
static void
recv_obp(struct ship *ship, long a, long b, long c, long d)
{
struct BP *p = &ship->file->OBP[a];
p->turnsent = b;
p->toship = SHIP(c);
p->mensent = d;
}
static void
recv_pcrew(struct ship *ship, long a)
{
ship->file->pcrew = a;
}
static void
recv_unfoul(struct ship *ship, long a, long b)
{
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--;
}
}
}
static void
recv_points(struct ship *ship, long a)
{
ship->file->points = a;
}
static void
recv_qual(struct ship *ship, long a)
{
ship->specs->qual = a;
}
static void
recv_ungrap(struct ship *ship, long a, long b)
{
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--;
}
}
}
static void
recv_rigg(struct ship *ship, long a, long b, long c, long d)
{
struct shipspecs *s = ship->specs;
s->rig1 = a;
s->rig2 = b;
s->rig3 = c;
s->rig4 = d;
}
static void
recv_col(struct ship *ship, long a)
{
ship->file->col = a;
}
static void
recv_dir(struct ship *ship, long a)
{
ship->file->dir = a;
}
static void
recv_row(struct ship *ship, long a)
{
ship->file->row = a;
}
static void
recv_signal(struct ship *ship, const char *astr)
{
if (mode == MODE_PLAYER) {
if (nobells)
Signal("$$: %s", ship, astr);
else
Signal("\a$$: %s", ship, astr);
}
}
static void
recv_sink(struct ship *ship, long a)
{
if ((ship->file->sink = a) == 2)
ship->file->dir = 0;
}
static void
recv_struck(struct ship *ship, long a)
{
ship->file->struck = a;
}
static void
recv_ta(struct ship *ship, long a)
{
ship->specs->ta = a;
}
static void
recv_alive(void)
{
alive = 1;
}
static void
recv_turn(long a)
{
turn = a;
}
static void
recv_wind(long a, long b)
{
winddir = a;
windspeed = b;
}
static void
recv_fs(struct ship *ship, long a)
{
ship->file->FS = a;
}
static void
recv_grap(struct ship *ship, long a)
{
struct snag *p = &ship->file->grap[a];
if (SHIP(a)->file->dir == 0)
return;
if (p->sn_count++ == 0)
p->sn_turn = turn;
ship->file->ngrap++;
}
static void
recv_rig1(struct ship *ship, long a)
{
ship->specs->rig1 = a;
}
static void
recv_rig2(struct ship *ship, long a)
{
ship->specs->rig2 = a;
}
static void
recv_rig3(struct ship *ship, long a)
{
ship->specs->rig3 = a;
}
static void
recv_rig4(struct ship *ship, long a)
{
ship->specs->rig4 = a;
}
static void
recv_begin(struct ship *ship)
{
strcpy(ship->file->captain, "begin");
people++;
}
static void
recv_end(struct ship *ship)
{
*ship->file->captain = 0;
ship->file->points = 0;
people--;
}
static void
recv_ddead(void)
{
hasdriver = 0;
}
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