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git-svn-id: file:///srv/svn/joey/bsdgames-trunk@5086 a4a2c43b-8ac3-0310-8836-e0e880c912e2
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joey
1999-09-08 23:56:51 +00:00
commit 03272d67da
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102
cribbage/instr.c Normal file
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/* $NetBSD: instr.c,v 1.7 1997/10/11 02:44:31 lukem Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 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
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)instr.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: instr.c,v 1.7 1997/10/11 02:44:31 lukem Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <curses.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "deck.h"
#include "cribbage.h"
#include "pathnames.h"
void
instructions()
{
int pstat;
int fd;
pid_t pid;
const char *path;
switch (pid = vfork()) {
case -1:
err(1, "vfork");
case 0:
/* Follow the same behaviour for pagers as defined in POSIX.2
* for mailx and man. We only use a pager if stdout is
* a terminal, and we pass the file on stdin to sh -c pager.
*/
if (!isatty(1))
path = "cat";
else {
if (!(path = getenv("PAGER")) || (*path == 0))
path = _PATH_MORE;
}
if ((fd = open(_PATH_INSTR, O_RDONLY)) == -1) {
warn("open %s", _PATH_INSTR);
_exit(1);
}
if (dup2(fd, 0) == -1) {
warn("dup2");
_exit(1);
}
execl("/bin/sh", "sh", "-c", path, NULL);
warn("%s", "");
_exit(1);
default:
do {
pid = waitpid(pid, &pstat, 0);
} while (pid == -1 && errno == EINTR);
if (pid == -1 || WEXITSTATUS(pstat))
exit(1);
}
}