1 /* $NetBSD: instr.c,v 1.5 1997/07/10 06:47:30 mikel Exp $ */ 2 3 /*- 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)instr.c 8.1 (Berkeley) 5/31/93"; 39 #else 40 static char rcsid[] = "$NetBSD: instr.c,v 1.5 1997/07/10 06:47:30 mikel Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #include <sys/wait.h> 46 #include <sys/stat.h> 47 48 #include <curses.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 #include <errno.h> 54 55 #include "deck.h" 56 #include "cribbage.h" 57 #include "pathnames.h" 58 59 void 60 instructions() 61 { 62 struct stat sb; 63 union wait pstat; 64 pid_t pid; 65 char *pager, *path; 66 67 if (stat(_PATH_INSTR, &sb)) { 68 (void)fprintf(stderr, "cribbage: %s: %s.\n", _PATH_INSTR, 69 strerror(errno)); 70 exit(1); 71 } 72 switch (pid = vfork()) { 73 case -1: 74 (void)fprintf(stderr, "cribbage: %s.\n", strerror(errno)); 75 exit(1); 76 case 0: 77 if (!(path = getenv("PAGER"))) 78 path = _PATH_MORE; 79 if ((pager = strrchr(path, '/')) != NULL) 80 ++pager; 81 pager = path; 82 execlp(path, pager, _PATH_INSTR, NULL); 83 (void)fprintf(stderr, "cribbage: %s.\n", strerror(errno)); 84 _exit(1); 85 default: 86 do { 87 pid = waitpid(pid, (int *)&pstat, 0); 88 } while (pid == -1 && errno == EINTR); 89 if (pid == -1 || pstat.w_status) 90 exit(1); 91 } 92 } 93