/* $NetBSD: instr.c,v 1.4 1996/02/06 22:47:18 jtc 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. */ #ifndef lint #if 0 static char sccsid[] = "@(#)instr.c 8.1 (Berkeley) 5/31/93"; #else static char rcsid[] = "$NetBSD: instr.c,v 1.4 1996/02/06 22:47:18 jtc Exp $"; #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include "deck.h" #include "cribbage.h" #include "pathnames.h" void instructions() { struct stat sb; union wait pstat; pid_t pid; char *pager, *path; if (stat(_PATH_INSTR, &sb)) { (void)fprintf(stderr, "cribbage: %s: %s.\n", _PATH_INSTR, strerror(errno)); exit(1); } switch (pid = vfork()) { case -1: (void)fprintf(stderr, "cribbage: %s.\n", strerror(errno)); exit(1); case 0: if (!(path = getenv("PAGER"))) path = _PATH_MORE; if (pager = strrchr(path, '/')) ++pager; pager = path; execlp(path, pager, _PATH_INSTR, (char *)NULL); (void)fprintf(stderr, "cribbage: %s.\n", strerror(errno)); _exit(1); default: do { pid = waitpid(pid, (int *)&pstat, 0); } while (pid == -1 && errno == EINTR); if (pid == -1 || pstat.w_status) exit(1); } }