Clean up:
[dragonfly.git] / games / cribbage / instr.c
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1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)instr.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/games/cribbage/instr.c,v 1.5 1999/12/12 03:04:15 billf Exp $
35 * $DragonFly: src/games/cribbage/instr.c,v 1.2 2003/06/17 04:25:23 dillon Exp $
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36 */
37
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38#include <sys/types.h>
39#include <sys/wait.h>
40#include <sys/errno.h>
41#include <sys/stat.h>
42
43#include <curses.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <string.h>
47#include <unistd.h>
48
49#include "deck.h"
50#include "cribbage.h"
51#include "pathnames.h"
52
53void
54instructions()
55{
56 struct stat sb;
57 union wait pstat;
58 pid_t pid;
59 char *pager, *path;
60
61 if (stat(_PATH_INSTR, &sb)) {
62 (void)fprintf(stderr, "cribbage: %s: %s.\n", _PATH_INSTR,
63 strerror(errno));
64 exit(1);
65 }
66 switch (pid = vfork()) {
67 case -1:
68 (void)fprintf(stderr, "cribbage: %s.\n", strerror(errno));
69 exit(1);
70 case 0:
71 if (!(path = getenv("PAGER")))
72 path = _PATH_MORE;
73 if ((pager = rindex(path, '/')) != NULL)
74 ++pager;
75 pager = path;
76 execlp(path, pager, _PATH_INSTR, (char *)NULL);
77 (void)fprintf(stderr, "cribbage: %s.\n", strerror(errno));
78 _exit(1);
79 default:
80 do {
81 pid = waitpid(pid, (int *)&pstat, 0);
82 } while (pid == -1 && errno == EINTR);
83 if (pid == -1 || pstat.w_status)
84 exit(1);
85 }
86}