int
main(int ac, char *av[])
{
int f_usage = 0, f_list = 0, f_showscore = 0;
int f_printpath = 0;
const char *file = NULL;
char *name, *ptr, *seed;
struct sigaction sa;
gid_t gid;
#ifdef BSD
struct itimerval itv;
#endif
open_score_file();
/* revoke privs */
gid = getgid();
setresgid(gid, gid, gid);
start_time = time(0);
makenoise = 1;
seed = NULL;
name = *av++;
while (*av) {
#ifndef SAVEDASH
if (**av == '-')
++*av;
else
break;
#endif
ptr = *av++;
while (*ptr) {
switch (*ptr) {
case '?':
case 'u':
f_usage++;
break;
case 'l':
f_list++;
break;
case 's':
case 't':
f_showscore++;
break;
case 'p':
f_printpath++;
break;
case 'q':
makenoise = 0;
break;
case 'r':
seed = *av;
av++;
break;
case 'f':
case 'g':
file = *av;
av++;
break;
default:
warnx("unknown option '%c'", *ptr);
f_usage++;
break;
}
ptr++;
}
}
if (seed != NULL)
srandom(atol(seed));
else
srandomdev();
if (f_usage)
fprintf(stderr,
"usage: %s [-lpqstu?] [-f game] [-g game] [-r seed]\n",
name);
if (f_showscore)
log_score(1);
if (f_list)
list_games();
if (f_printpath) {
size_t len;
char buf[256];
strlcpy(buf, _PATH_GAMES, sizeof buf);
len = strlen(buf);
if (len != 0 && buf[len - 1] == '/')
buf[len - 1] = '\0';
puts(buf);
}
if (f_usage || f_showscore || f_list || f_printpath)
exit(0);
if (file == NULL)
file = default_game();
else
file = okay_game(file);
if (file == NULL || read_file(file) < 0)
exit(1);
setup_screen(sp);
addplane();
signal(SIGINT, quit);
signal(SIGQUIT, quit);
#ifdef BSD
signal(SIGTSTP, SIG_IGN);
signal(SIGSTOP, SIG_IGN);
#endif
signal(SIGHUP, log_score_quit);
signal(SIGTERM, log_score_quit);
tcgetattr(fileno(stdin), &tty_start);
tty_new = tty_start;
tty_new.c_lflag &= ~(ICANON|ECHO);
tty_new.c_iflag |= ICRNL;
tty_new.c_cc[VMIN] = 1;
tty_new.c_cc[VTIME] = 0;
tcsetattr(fileno(stdin), TCSADRAIN, &tty_new);
memset(&sa, 0, sizeof sa);
sa.sa_handler = update;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGALRM);
sigaddset(&sa.sa_mask, SIGINT);
sa.sa_flags = 0;
sigaction(SIGALRM, &sa, (struct sigaction *)0);
#ifdef BSD
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 1;
itv.it_interval.tv_sec = sp->update_secs;
itv.it_interval.tv_usec = 0;
setitimer(ITIMER_REAL, &itv, NULL);
#endif
#ifdef SYSV
alarm(sp->update_secs);
#endif
for (;;) {
if (getcommand() != 1)
planewin();
else {
#ifdef BSD
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 0;
setitimer(ITIMER_REAL, &itv, NULL);
#endif
#ifdef SYSV
alarm(0);
#endif
update(0);
#ifdef BSD
itv.it_value.tv_sec = sp->update_secs;
itv.it_value.tv_usec = 0;
itv.it_interval.tv_sec = sp->update_secs;
itv.it_interval.tv_usec = 0;
setitimer(ITIMER_REAL, &itv, NULL);
#endif
#ifdef SYSV
alarm(sp->update_secs);
#endif
}
}
}
void
update(int dummy)
{
int i, dir_diff, unclean;
PLANE *pp, *p1, *p2;
clck++;
erase_all();
/* put some planes in the air */
do {
unclean = 0;
for (pp = ground.head; pp != NULL; pp = pp->next) {
if (pp->new_altitude > 0) {
delete(&ground, pp);
append(&air, pp);
unclean = 1;
break;
}
}
} while (unclean);
/* do altitude change and basic movement */
for (pp = air.head; pp != NULL; pp = pp->next) {
/* type 0 only move every other turn */
if (pp->plane_type == 0 && clck & 1)
continue;
pp->fuel--;
if (pp->fuel < 0)
loser(pp, "ran out of fuel.");
pp->altitude += SGN(pp->new_altitude - pp->altitude);
if (!pp->delayd) {
dir_diff = pp->new_dir - pp->dir;
/*
* Allow for circle commands
*/
if (pp->new_dir >= 0 && pp->new_dir < MAXDIR) {
if (dir_diff > MAXDIR/2)
dir_diff -= MAXDIR;
else if (dir_diff < -(MAXDIR/2))
dir_diff += MAXDIR;
}
if (dir_diff > 2)
dir_diff = 2;
else if (dir_diff < -2)
dir_diff = -2;
pp->dir += dir_diff;
if (pp->dir >= MAXDIR)
pp->dir -= MAXDIR;
else if (pp->dir < 0)
pp->dir += MAXDIR;
}
pp->xpos += displacement[pp->dir].dx;
pp->ypos += displacement[pp->dir].dy;
if (pp->delayd && pp->xpos == sp->beacon[pp->delayd_no].x &&
pp->ypos == sp->beacon[pp->delayd_no].y) {
pp->delayd = 0;
if (pp->status == S_UNMARKED)
pp->status = S_MARKED;
}
switch (pp->dest_type) {
case T_AIRPORT:
if (pp->xpos == sp->airport[pp->dest_no].x &&
pp->ypos == sp->airport[pp->dest_no].y &&
pp->altitude == 0) {
if (pp->dir != sp->airport[pp->dest_no].dir)
loser(pp, "landed in the wrong direction.");
else {
pp->status = S_GONE;
continue;
}
}
break;
case T_EXIT:
if (pp->xpos == sp->exit[pp->dest_no].x &&
pp->ypos == sp->exit[pp->dest_no].y) {
if (pp->altitude != 9)
loser(pp, "exited at the wrong altitude.");
else {
pp->status = S_GONE;
continue;
}
}
break;
default:
loser(pp, "has a bizarre destination, get help!");
}
if (pp->altitude > 9)
/* "this is impossible" */
loser(pp, "exceeded flight ceiling.");
if (pp->altitude <= 0) {
for (i = 0; i < sp->num_airports; i++)
if (pp->xpos == sp->airport[i].x &&
pp->ypos == sp->airport[i].y) {
if (pp->dest_type == T_AIRPORT)
loser(pp,
"landed at the wrong airport.");
else
loser(pp,
"landed instead of exited.");
}
loser(pp, "crashed on the ground.");
}
if (pp->xpos < 1 || pp->xpos >= sp->width - 1 ||
pp->ypos < 1 || pp->ypos >= sp->height - 1) {
for (i = 0; i < sp->num_exits; i++)
if (pp->xpos == sp->exit[i].x &&
pp->ypos == sp->exit[i].y) {
if (pp->dest_type == T_EXIT)
loser(pp,
"exited via the wrong exit.");
else
loser(pp,
"exited instead of landed.");
}
loser(pp, "illegally left the flight arena.");
}
}
/*
* Traverse the list once, deleting the planes that are gone.
*/
for (pp = air.head; pp != NULL; pp = p2) {
p2 = pp->next;
if (pp->status == S_GONE) {
safe_planes++;
delete(&air, pp);
}
}
draw_all();
for (p1 = air.head; p1 != NULL; p1 = p1->next)
for (p2 = p1->next; p2 != NULL; p2 = p2->next)
if (too_close(p1, p2, 1)) {
static char buf[80];
(void)snprintf(buf, sizeof buf,
"collided with plane '%c'.",
name(p2));
loser(p1, buf);
}
/*
* Check every other update. Actually, only add on even updates.
* Otherwise, prop jobs show up *on* entrance. Remember that
* we don't update props on odd updates.
*/
if ((atcrandom() % sp->newplane_time) == 0)
addplane();
}
int
main(int argc __unused, char *argv[])
{
int seed = 0;
int f_usage = 0, f_list = 0, f_showscore = 0;
int f_printpath = 0;
const char *file = NULL;
char *p_name, *ptr;
struct itimerval itv;
/* Open the score file then revoke setgid privileges */
open_score_file();
setregid(getgid(), getgid());
start_time = time(0);
p_name = *argv++;
while (*argv) {
#ifndef SAVEDASH
if (**argv == '-')
++*argv;
else
break;
#endif
ptr = *argv++;
while (*ptr) {
switch (*ptr) {
case '?':
case 'u':
f_usage++;
break;
case 'l':
f_list++;
break;
case 's':
case 't':
f_showscore++;
break;
case 'p':
f_printpath++;
break;
case 'r':
srandom(atoi(*argv));
seed = 1;
argv++;
break;
case 'f':
case 'g':
file = *argv;
argv++;
break;
default:
fprintf(stderr, "Unknown option '%c'\n", *ptr);
f_usage++;
break;
}
ptr++;
}
}
if (!seed)
srandomdev();
if (f_usage)
fprintf(stderr,
"Usage: %s -[u?lstp] [-[gf] game_name] [-r random seed]\n",
p_name);
if (f_showscore)
log_score(1);
if (f_list)
list_games();
if (f_printpath) {
char buf[100];
strcpy(buf, _PATH_GAMES);
buf[strlen(buf) - 1] = '\0';
puts(buf);
}
if (f_usage || f_showscore || f_list || f_printpath)
exit(0);
if (file == NULL)
file = default_game();
else
file = okay_game(file);
if (file == NULL || read_file(file) < 0)
exit(1);
init_gr();
setup_screen(sp);
addplane();
signal(SIGINT, (sig_t)quit);
signal(SIGQUIT, (sig_t)quit);
signal(SIGTSTP, SIG_IGN);
signal(SIGSTOP, SIG_IGN);
signal(SIGHUP, (sig_t)log_score);
signal(SIGTERM, (sig_t)log_score);
tcgetattr(fileno(stdin), &tty_start);
bcopy(&tty_start, &tty_new, sizeof(tty_new));
tty_new.c_lflag &= ~(ICANON|ECHO);
tty_new.c_cc[VMIN] = 1;
tty_new.c_cc[VTIME] = 0;
tcsetattr(fileno(stdin), TCSANOW, &tty_new);
signal(SIGALRM, (sig_t)update);
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 1;
itv.it_interval.tv_sec = sp->update_secs;
itv.it_interval.tv_usec = 0;
setitimer(ITIMER_REAL, &itv, NULL);
for (;;) {
if (getcommand() != 1)
planewin();
else {
itv.it_value.tv_sec = 0;
itv.it_value.tv_usec = 0;
setitimer(ITIMER_REAL, &itv, NULL);
update();
itv.it_value.tv_sec = sp->update_secs;
itv.it_value.tv_usec = 0;
itv.it_interval.tv_sec = sp->update_secs;
itv.it_interval.tv_usec = 0;
setitimer(ITIMER_REAL, &itv, NULL);
}
}
}