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. 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 $ 36 */ 37 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 53 void 54 instructions() 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 } 87