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 */ 32 33 #include <errno.h> 34 #include <paths.h> 35 #include "mille.h" 36 37 /* 38 * @(#)varpush.c 1.1 (Berkeley) 4/1/82 39 */ 40 41 /* 42 * push variables around via the routine func() on the file 43 * channel file. func() is either readv or writev. 44 */ 45 bool 46 varpush(int file, ssize_t (*func)(int, const struct iovec *, int)) 47 { 48 int temp; 49 const struct iovec iov[] = { 50 { (void *) &Debug, sizeof Debug }, 51 { (void *) &Finished, sizeof Finished }, 52 { (void *) &Order, sizeof Order }, 53 { (void *) &End, sizeof End }, 54 { (void *) &On_exit, sizeof On_exit }, 55 { (void *) &Handstart, sizeof Handstart }, 56 { (void *) &Numgos, sizeof Numgos }, 57 { (void *) Numseen, sizeof Numseen }, 58 { (void *) &Play, sizeof Play }, 59 { (void *) &Window, sizeof Window }, 60 { (void *) Deck, sizeof Deck }, 61 { (void *) &Discard, sizeof Discard }, 62 { (void *) Player, sizeof Player } 63 }; 64 65 if (((func)(file, iov, sizeof(iov) /sizeof(iov[0]))) < 0) { 66 error(strerror(errno)); 67 return FALSE; 68 } 69 70 if (func == readv) { 71 if ((read(file, (void *) &temp, sizeof temp)) < 0) { 72 error(strerror(errno)); 73 return FALSE; 74 } 75 Topcard = &Deck[temp]; 76 #ifdef DEBUG 77 if (Debug) { 78 char buf[80]; 79 over: 80 printf("Debug file:"); 81 fgets(buf, sizeof(buf), stdin); 82 if ((outf = fopen(buf, "w")) == NULL) { 83 perror(buf); 84 goto over; 85 } 86 if (strcmp(buf, _PATH_DEVNULL) != 0) 87 setbuf(outf, NULL); 88 } 89 #endif 90 } else { 91 temp = Topcard - Deck; 92 if ((write(file, (void *) &temp, sizeof temp)) < 0) { 93 error(strerror(errno)); 94 return FALSE; 95 } 96 } 97 return TRUE; 98 } 99