1 /*- 2 * Copyright (c) 1982, 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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)varpush.c 8.1 (Berkeley) 5/31/93 30 * $FreeBSD: src/games/mille/varpush.c,v 1.6 1999/12/12 06:17:25 billf Exp $ 31 * $DragonFly: src/games/mille/varpush.c,v 1.3 2006/08/27 17:17:23 pavalos Exp $ 32 */ 33 34 #include <errno.h> 35 #include <paths.h> 36 #include "mille.h" 37 38 /* 39 * @(#)varpush.c 1.1 (Berkeley) 4/1/82 40 */ 41 42 /* 43 * push variables around via the routine func() on the file 44 * channel file. func() is either readv or writev. 45 */ 46 bool 47 varpush(int file, ssize_t (*func)(int, const struct iovec *, int)) 48 { 49 int temp; 50 const struct iovec iov[] = { 51 { (void *) &Debug, sizeof Debug }, 52 { (void *) &Finished, sizeof Finished }, 53 { (void *) &Order, sizeof Order }, 54 { (void *) &End, sizeof End }, 55 { (void *) &On_exit, sizeof On_exit }, 56 { (void *) &Handstart, sizeof Handstart }, 57 { (void *) &Numgos, sizeof Numgos }, 58 { (void *) Numseen, sizeof Numseen }, 59 { (void *) &Play, sizeof Play }, 60 { (void *) &Window, sizeof Window }, 61 { (void *) Deck, sizeof Deck }, 62 { (void *) &Discard, sizeof Discard }, 63 { (void *) Player, sizeof Player } 64 }; 65 66 if (((func)(file, iov, sizeof(iov) /sizeof(iov[0]))) < 0) { 67 error(strerror(errno)); 68 return FALSE; 69 } 70 71 if (func == readv) { 72 if ((read(file, (void *) &temp, sizeof temp)) < 0) { 73 error(strerror(errno)); 74 return FALSE; 75 } 76 Topcard = &Deck[temp]; 77 #ifdef DEBUG 78 if (Debug) { 79 char buf[80]; 80 over: 81 printf("Debug file:"); 82 fgets(buf, 80, stdin); 83 if ((outf = fopen(buf, "w")) == NULL) { 84 perror(buf); 85 goto over; 86 } 87 if (strcmp(buf, _PATH_DEVNULL) != 0) 88 setbuf(outf, NULL); 89 } 90 #endif 91 } else { 92 temp = Topcard - Deck; 93 if ((write(file, (void *) &temp, sizeof temp)) < 0) { 94 error(strerror(errno)); 95 return FALSE; 96 } 97 } 98 return TRUE; 99 } 100