1 /* $NetBSD: help.c,v 1.7 2011/08/31 16:24:55 plunky Exp $ */
2
3 /*-
4 * Copyright (c) 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Barry Brachman.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "@(#)help.c 8.1 (Berkeley) 6/11/93";
39 #else
40 __RCSID("$NetBSD: help.c,v 1.7 2011/08/31 16:24:55 plunky Exp $");
41 #endif
42 #endif /* not lint */
43
44 #include <curses.h>
45 #include <stdio.h>
46
47 #include "bog.h"
48 #include "extern.h"
49
50 extern int nlines;
51
52 int
help(void)53 help(void)
54 {
55 int eof, i;
56 FILE *fp;
57 WINDOW *win;
58 char buf[BUFSIZ];
59
60 if ((fp = fopen(HELPFILE, "r")) == NULL)
61 return(-1);
62 win = newwin(0, 0, 0, 0);
63 clearok(win, 1);
64
65 eof = 0;
66 if (ungetc(getc(fp), fp) == EOF) {
67 wprintw(win, "There doesn't seem to be any help.");
68 eof = 1; /* Nothing there... */
69 }
70
71 while (!eof) {
72 for (i = 0; i < nlines - 3; i++) {
73 if (fgets(buf, sizeof(buf), fp) == NULL) {
74 eof = 1;
75 break;
76 }
77 if (buf[0] == '.' && buf[1] == '\n')
78 break;
79 wprintw(win, "%s", buf);
80 }
81 if (eof || ungetc(getc(fp), fp) == EOF) {
82 eof = 1;
83 break;
84 }
85 wmove(win, nlines - 1, 0);
86 wprintw(win,
87 "Type <space> to continue, anything else to quit...");
88 wrefresh(win);
89 if ((inputch() & 0177) != ' ')
90 break;
91 wclear(win);
92 }
93
94 fclose(fp);
95 if (eof) {
96 wmove(win, nlines - 1, 0);
97 wprintw(win, "Hit any key to continue...");
98 wrefresh(win);
99 inputch();
100 }
101 delwin(win);
102 clearok(stdscr, 1);
103 refresh();
104 return(0);
105 }
106