This patch fixes a -Wcast-qual warning in wump(6).

[bsdgames-darwin.git] / wump / wump.c

diff --git a/wump/wump.c b/wump/wump.c
index 536324ef711647240052a39b3b2e8e02678e1048..5d6066b3eb0a7faf951b50fe91e6521e815beb34 100644 (file)
--- a/wump/wump.c
+++ b/wump/wump.c
@@ -1,4 +1,4 @@
-/*     $NetBSD: wump.c,v 1.4 1995/04/24 12:26:22 cgd Exp $     */
+/*     $NetBSD: wump.c,v 1.9 1999/07/14 22:49:27 hubertf Exp $ */
 
 /*
  * Copyright (c) 1989, 1993
@@ -37,17 +37,17 @@
  * SUCH DAMAGE.
  */
 
+#include <sys/cdefs.h>
 #ifndef lint
-static char copyright[] =
-"@(#) Copyright (c) 1989, 1993\n\
-       The Regents of the University of California.  All rights reserved.\n";
+__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
+       The Regents of the University of California.  All rights reserved.\n");
 #endif /* not lint */
 
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)wump.c     8.1 (Berkeley) 5/31/93";
 #else
-static char rcsid[] = "$NetBSD: wump.c,v 1.4 1995/04/24 12:26:22 cgd Exp $";
+__RCSID("$NetBSD: wump.c,v 1.9 1999/07/14 22:49:27 hubertf Exp $");
 #endif
 #endif /* not lint */
 
@@ -57,10 +57,14 @@ static char rcsid[] = "$NetBSD: wump.c,v 1.4 1995/04/24 12:26:22 cgd Exp $";
  * would care to remember.
  */
 
+#include <err.h>
 #include <sys/types.h>
 #include <sys/file.h>
+#include <sys/wait.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include "pathnames.h"
 
 /* some defines to spec out what our wumpus cave should look like */
@@ -111,17 +115,41 @@ int arrow_num = NUMBER_OF_ARROWS; /* arrow inventory */
 
 char answer[20];                       /* user input */
 
+int    bats_nearby __P((void));
+void   cave_init __P((void));
+void   clear_things_in_cave __P((void));
+void   display_room_stats __P((void));
+int    getans __P((const char *));
+void   initialize_things_in_cave __P((void));
+void   instructions __P((void));
+int    int_compare __P((const void *, const void *));
+void   jump __P((int));
+void   kill_wump __P((void));
+int    main __P((int, char **));
+int    move_to __P((const char *));
+void   move_wump __P((void));
+void   no_arrows __P((void));
+void   pit_kill __P((void));
+int    pit_nearby __P((void));
+void   pit_survive __P((void));
+int    shoot __P((char *));
+void   shoot_self __P((void));
+int    take_action __P((void));
+void   usage __P((void)) __attribute__((__noreturn__));
+void   wump_kill __P((void));
+int    wump_nearby __P((void));
+
+int
 main(argc, argv)
        int argc;
        char **argv;
 {
-       extern char *optarg;
        int c;
 
 #ifdef DEBUG
-       while ((c = getopt(argc, argv, "a:b:hp:r:t:d")) != EOF)
+       while ((c = getopt(argc, argv, "a:b:hp:r:t:d")) != -1)
 #else
-       while ((c = getopt(argc, argv, "a:b:hp:r:t:")) != EOF)
+       while ((c = getopt(argc, argv, "a:b:hp:r:t:")) != -1)
 #endif
                switch (c) {
                case 'a':
@@ -221,11 +249,13 @@ quiver holds %d custom super anti-evil Wumpus arrows.  Good luck.\n",
                        cave_init();
        }
        /* NOTREACHED */
+       return (0);
 }
 
+void
 display_room_stats()
 {
-       register int i;
+       int i;
 
        /*
         * Routine will explain what's going on with the current room, as well
@@ -252,6 +282,7 @@ display_room_stats()
        (void)printf("and %d.\n", cave[player_loc].tunnel[link_num - 1]);
 }
 
+int
 take_action()
 {
        /*
@@ -280,8 +311,9 @@ take_action()
        return(0);
 }
 
+int
 move_to(room_number)
-       char *room_number;
+       const char *room_number;
 {
        int i, just_moved_by_bats, next_room, tunnel_available;
 
@@ -347,7 +379,7 @@ move_to(room_number)
                        wump_kill();
                        return(1);
                }
-               if (cave[next_room].has_a_pit)
+               if (cave[next_room].has_a_pit) {
                        if (random() % 12 < 2) {
                                pit_survive();
                                return(0);
@@ -355,6 +387,7 @@ move_to(room_number)
                                pit_kill();
                                return(1);
                        }
+               }
 
                if (cave[next_room].has_a_bat) {
                        (void)printf(
@@ -370,12 +403,13 @@ move_to(room_number)
        return(0);
 }
 
+int
 shoot(room_list)
        char *room_list;
 {
        int chance, next, roomcnt;
        int j, arrow_location, link, ok;
-       char *p, *strtok();
+       char *p;
 
        /*
         * Implement shooting arrows.  Arrows are shot by the player indicating
@@ -389,13 +423,14 @@ shoot(room_list)
         */
        arrow_location = player_loc;
        for (roomcnt = 1;; ++roomcnt, room_list = NULL) {
-               if (!(p = strtok(room_list, " \t\n")))
+               if (!(p = strtok(room_list, " \t\n"))) {
                        if (roomcnt == 1) {
                                (void)printf(
                        "The arrow falls to the ground at your feet!\n");
                                return(0);
                        } else
                                break;
+               }
                if (roomcnt > 5) {
                        (void)printf(
 "The arrow wavers in its flight and and can go no further!\n");
@@ -481,11 +516,11 @@ The arrow is weakly shot and can go no further!\n");
        return(0);
 }
 
+void
 cave_init()
 {
-       register int i, j, k, link;
-       int delta, int_compare();
-       time_t time();
+       int i, j, k, link;
+       int delta;
 
        /*
         * This does most of the interesting work in this program actually!
@@ -555,9 +590,10 @@ try_again:         link = (random() % room_num) + 1;
 #endif
 }
 
+void
 clear_things_in_cave()
 {
-       register int i;
+       int i;
 
        /*
         * remove bats and pits from the current cave in preparation for us
@@ -567,9 +603,10 @@ clear_things_in_cave()
                cave[i].has_a_bat = cave[i].has_a_pit = 0;
 }
 
+void
 initialize_things_in_cave()
 {
-       register int i, loc;
+       int i, loc;
 
        /* place some bats, pits, the wumpus, and the player. */
        for (i = 0; i < bat_num; ++i) {
@@ -606,8 +643,9 @@ initialize_things_in_cave()
            (link_num / room_num < 0.4 ? wump_nearby() : 0) : 0));
 }
 
+int
 getans(prompt)
-       char *prompt;
+       const char *prompt;
 {
        char buf[20];
 
@@ -631,9 +669,10 @@ getans(prompt)
        /* NOTREACHED */
 }
 
+int
 bats_nearby()
 { 
-       register int i;
+       int i;
 
        /* check for bats in the immediate vicinity */
        for (i = 0; i < link_num; ++i)
@@ -642,9 +681,10 @@ bats_nearby()
        return(0);
 }
 
+int
 pit_nearby()
 { 
-       register int i;
+       int i;
 
        /* check for pits in the immediate vicinity */
        for (i = 0; i < link_num; ++i)
@@ -653,9 +693,10 @@ pit_nearby()
        return(0);
 }
 
+int
 wump_nearby()
 {
-       register int i, j;
+       int i, j;
 
        /* check for a wumpus within TWO caves of where we are */
        for (i = 0; i < link_num; ++i) {
@@ -669,20 +710,26 @@ wump_nearby()
        return(0);
 }
 
+void
 move_wump()
 {
        wumpus_loc = cave[wumpus_loc].tunnel[random() % link_num];
 }
 
+int
 int_compare(a, b)
-       int *a, *b;
+       const void *a, *b;
 {
-       return(*a < *b ? -1 : 1);
+       return(*(const int *)a < *(const int *)b ? -1 : 1);
 }
 
+void
 instructions()
 {
-       char buf[120], *p, *getenv();
+       const char *pager;
+       pid_t pid;
+       int status;
+       int fd;
 
        /*
         * read the instructions file, if needed, and show the user how to
@@ -698,14 +745,29 @@ puff of greasy black smoke! (poof)\n");
                return;
        }
 
-       if (!(p = getenv("PAGER")) ||
-           strlen(p) > sizeof(buf) + strlen(_PATH_WUMPINFO) + 5)
-               p = _PATH_PAGER;
-
-       (void)sprintf(buf, "%s %s", p, _PATH_WUMPINFO);
-       (void)system(buf);
+       if (!isatty(1))
+               pager = "cat";
+       else {
+               if (!(pager = getenv("PAGER")) || (*pager == 0))
+                       pager = _PATH_PAGER;
+       }
+       switch (pid = fork()) {
+       case 0: /* child */
+               if ((fd = open(_PATH_WUMPINFO, O_RDONLY)) == -1)
+                       err(1, "open %s", _PATH_WUMPINFO);
+               if (dup2(fd, 0) == -1)
+                       err(1, "dup2");
+               (void)execl("/bin/sh", "sh", "-c", pager, NULL);
+               err(1, "exec sh -c %s", pager);
+       case -1:
+               err(1, "fork");
+       default:
+               (void)waitpid(pid, &status, 0);
+               break;
+       }
 }
 
+void
 usage()
 {
        (void)fprintf(stderr,
@@ -715,6 +777,7 @@ usage()
 
 /* messages */
 
+void
 wump_kill()
 {
        (void)printf(
@@ -726,6 +789,7 @@ so long since the evil Wumpus cleaned his teeth that you immediately\n\
 passed out from the stench!\n");
 }
 
+void
 kill_wump()
 {
        (void)printf(
@@ -737,6 +801,7 @@ dead Wumpus is also quite well known, a stench plenty enough to slay the\n\
 mightiest adventurer at a single whiff!!\n");
 }
 
+void
 no_arrows()
 {
        (void)printf(
@@ -746,6 +811,7 @@ with its psychic powers, the evil Wumpus rampagees through the cave, finds\n\
 you, and with a mighty *ROAR* eats you alive!\n");
 }
 
+void
 shoot_self()
 {
        (void)printf(
@@ -756,6 +822,7 @@ and immediately rushes to your side, not to help, alas, but to EAT YOU!\n\
 (*CHOMP*)\n");
 }
 
+void
 jump(where)
        int where;
 {
@@ -765,6 +832,7 @@ notice that the walls are shimmering and glowing.  Suddenly you feel\n\
 a very curious, warm sensation and find yourself in room %d!!\n", where);
 }
 
+void
 pit_kill()
 {
        (void)printf(
@@ -776,6 +844,7 @@ you fall many miles to the core of the earth.  Look on the bright side;\n\
 you can at least find out if Jules Verne was right...\n");
 }
 
+void
 pit_survive()
 {
        (void)printf(