check for -1 in CAPTURED

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

#ifndef lint
static  char *sccsid = "@(#)sync.c      1.7 83/10/28";
#endif

#include "externs.h"

static char sync_buf[BUFSIZE];
static char *sync_bufp = 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);
       time(&t);
       if (stat(buf, &s) < 0)
               return 0;
       if (s.st_mtime < t - 60*60*2) {         /* 2 hours */
               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;
{
       (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_bufp, "%d %d %d %s\n",
                       type, ship-SHIP(0), 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++)
               ;
       sync_bufp--;
       if (sync_bufp >= &sync_buf[sizeof sync_buf])
               abort();
       sync_update(type, ship, a, b, c, d);
}

Sync()
{
       int (*sig1)(), (*sig2)();
       int type, shipnum, isstr, a, b, c, d;
       char buf[60];
       register char *p = buf;
       int n;

       sig1 = signal(SIGHUP, SIG_IGN);
       sig2 = signal(SIGINT, SIG_IGN);
       for (n = 0; link(sync_file, sync_lock) < 0 && n < 30; n++)
               sleep(2);
       (void) fseek(sync_fp, sync_seek, 0);
       while (fscanf(sync_fp, "%d%d%d", &type, &shipnum, &isstr) != EOF) {
               if (isstr) {
                       for (p = buf;;) {
                               switch (*p++ = getc(sync_fp)) {
                               case '\n':
                                       p--;
                               case EOF:
                                       break;
                               default:
                                       continue;
                               }
                               break;
                       }
                       *p = 0;
                       for (p = buf; *p == ' '; p++)
                               ;
                       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 (sync_bufp != sync_buf) {
               (void) fseek(sync_fp, 0L, 2);
               (void) fputs(sync_buf, sync_fp);
               (void) fflush(sync_fp);
               sync_bufp = sync_buf;
       }
       sync_seek = ftell(sync_fp);
       (void) unlink(sync_lock);
       (void) signal(SIGHUP, sig1);
       (void) signal(SIGINT, sig2);
}

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->fouls[a];
               p->turnfoul = b;
               p->toship = SHIP(c);
               break;
               }
       case W_GRAP: {
               register struct snag *p = &ship->file->grapples[a];
               p->turnfoul = b;
               p->toship = SHIP(c);
               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_LAST:
               (void) strncpy(ship->file->last, (char *)a,
                       sizeof ship->file->last - 1);
               ship->file->last[sizeof ship->file->last - 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_SHIPCOL:
               ship->file->col = a;
               break;
       case W_SHIPDIR:
               ship->file->dir = a;
               break;
       case W_SHIPROW:
               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:
               (void) strcpy(ship->file->captain, "");
               people--;
               break;
       default:
               fprintf(stderr, "sync_update: unknown type %d\n", type);
               break;
       }
}