Better user interface. From OpenBSD, written by Paul Janzen quite a

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

diff --git a/quiz/quiz.c b/quiz/quiz.c
index a2463b1252360ef8eec9c48e1152f04b95246fbf..eb11f9164fb667cff21bb008aa6e1dccd1b55740 100644 (file)
--- a/quiz/quiz.c
+++ b/quiz/quiz.c
@@ -1,4 +1,4 @@
-/*     $NetBSD: quiz.c,v 1.12 1997/09/20 14:28:18 lukem Exp $  */
+/*     $NetBSD: quiz.c,v 1.26 2009/08/27 00:31:12 dholland Exp $       */
 
 /*-
  * Copyright (c) 1991, 1993
@@ -16,11 +16,7 @@
  * 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
+ * 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.
  *
@@ -39,15 +35,15 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
-__COPYRIGHT("@(#) Copyright (c) 1991, 1993\n\
-       The Regents of the University of California.  All rights reserved.\n");
+__COPYRIGHT("@(#) Copyright (c) 1991, 1993\
+ The Regents of the University of California.  All rights reserved.");
 #endif /* not lint */
 
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)quiz.c     8.3 (Berkeley) 5/4/95";
 #else
-__RCSID("$NetBSD: quiz.c,v 1.12 1997/09/20 14:28:18 lukem Exp $");
+__RCSID("$NetBSD: quiz.c,v 1.26 2009/08/27 00:31:12 dholland Exp $");
 #endif
 #endif /* not lint */
 
@@ -58,7 +54,6 @@ __RCSID("$NetBSD: quiz.c,v 1.12 1997/09/20 14:28:18 lukem Exp $");
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <ctype.h>
 #include <err.h>
 #include <time.h>
 #include <unistd.h>
@@ -67,26 +62,26 @@ __RCSID("$NetBSD: quiz.c,v 1.12 1997/09/20 14:28:18 lukem Exp $");
 
 static QE qlist;
 static int catone, cattwo, tflag;
-static u_int qsize;
+static unsigned qsize;
 
-char   *appdstr __P((char *, char *, size_t));
-void    downcase __P((char *));
-void    get_cats __P((char *, char *));
-void    get_file __P((char *));
-int     main __P((int, char *[]));
-char   *next_cat __P((char *));
-void    quiz __P((void));
-void    score __P((u_int, u_int, u_int));
-void    show_index __P((void));
-void    usage __P((void));
+static char *appdstr(char *, const char *, size_t);
+static void downcase(char *);
+static void get_cats(char *, char *);
+static void get_file(const char *);
+static const char *next_cat(const char *);
+static void quiz(void);
+static void score(unsigned, unsigned, unsigned);
+static void show_index(void);
+static void usage(void) __dead;
 
 int
-main(argc, argv)
-       int argc;
-       char *argv[];
+main(int argc, char *argv[])
 {
        int ch;
-       char *indexfile;
+       const char *indexfile;
+
+       /* Revoke setgid privileges */
+       setgid(getgid());
 
        indexfile = _PATH_QUIZIDX;
        while ((ch = getopt(argc, argv, "i:t")) != -1)
@@ -120,9 +115,8 @@ main(argc, argv)
        exit(0);
 }
 
-void
-get_file(file)
-       char *file;
+static void
+get_file(const char *file)
 {
        FILE *fp;
        QE *qp;
@@ -160,15 +154,22 @@ get_file(file)
        (void)fclose(fp);
 }
 
-void
-show_index()
+static void
+show_index(void)
 {
        QE *qp;
-       char *p, *s;
+       const char *p, *s;
        FILE *pf;
+       const char *pager;
 
-       if ((pf = popen(_PATH_PAGER, "w")) == NULL)
-               err(1, "%s", _PATH_PAGER);
+       if (!isatty(1))
+               pager = "cat";
+       else {
+               if (!(pager = getenv("PAGER")) || (*pager == 0))
+                       pager = _PATH_PAGER;
+       }
+       if ((pf = popen(pager, "w")) == NULL)
+               err(1, "%s", pager);
        (void)fprintf(pf, "Subjects:\n\n");
        for (qp = qlist.q_next; qp; qp = qp->q_next) {
                for (s = next_cat(qp->q_text); s; s = next_cat(s)) {
@@ -186,13 +187,12 @@ show_index()
        (void)pclose(pf);
 }
 
-void
-get_cats(cat1, cat2)
-       char *cat1, *cat2;
+static void
+get_cats(char *cat1, char *cat2)
 {
        QE *qp;
        int i;
-       char *s;
+       const char *s;
 
        downcase(cat1);
        downcase(cat2);
@@ -219,15 +219,16 @@ get_cats(cat1, cat2)
        errx(1, "invalid categories");
 }
 
-void
-quiz()
+static void
+quiz(void)
 {
        QE *qp;
        int i;
        size_t len;
-       u_int guesses, rights, wrongs;
+       unsigned guesses, rights, wrongs;
        int next;
-       char *answer, *s, *t, question[LINE_SZ];
+       char *answer, *t, question[LINE_SZ];
+       const char *s;
 
        srandom(time(NULL));
        guesses = rights = wrongs = 0;
@@ -301,9 +302,8 @@ quiz()
        score(rights, wrongs, guesses);
 }
 
-char *
-next_cat(s)
-       char *  s;
+static const char *
+next_cat(const char *s)
 {
        int esc;
 
@@ -325,19 +325,17 @@ next_cat(s)
        /* NOTREACHED */
 }
 
-char *
-appdstr(s, tp, len)
-       char *s;
-       char *tp;
-       size_t len;
+static char *
+appdstr(char *s, const char *tp, size_t len)
 {
-       char *mp, *sp;
+       char *mp;
+       const char *sp;
        int ch;
        char *m;
 
        if ((m = malloc(strlen(s) + len + 1)) == NULL)
                errx(1, "malloc");
-       for (mp = m, sp = s; (*mp++ = *sp++) != NULL; )
+       for (mp = m, sp = s; (*mp++ = *sp++) != '\0'; )
                ;
        --mp;
        if (*(mp - 1) == '\\')
@@ -351,9 +349,8 @@ appdstr(s, tp, len)
        return (m);
 }
 
-void
-score(r, w, g)
-       u_int r, w, g;
+static void
+score(unsigned r, unsigned w, unsigned g)
 {
        (void)printf("Rights %d, wrongs %d,", r, w);
        if (g)
@@ -361,9 +358,8 @@ score(r, w, g)
        (void)printf(" score %d%%\n", (r + w + g) ? r * 100 / (r + w + g) : 0);
 }
 
-void
-downcase(p)
-       char *p;
+static void
+downcase(char *p)
 {
        int ch;
 
@@ -372,8 +368,8 @@ downcase(p)
                        *p = tolower(ch);
 }
 
-void
-usage()
+static void
+usage(void)
 {
        (void)fprintf(stderr, "quiz [-t] [-i file] category1 category2\n");
        exit(1);