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      1 /*	$NetBSD: varpush.c,v 1.13 2016/06/05 18:39:02 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)varpush.c	8.1 (Berkeley) 5/31/93";
     36 #else
     37 __RCSID("$NetBSD: varpush.c,v 1.13 2016/06/05 18:39:02 christos Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <paths.h>
     42 #include "mille.h"
     43 
     44 /*
     45  * @(#)varpush.c	1.1 (Berkeley) 4/1/82
     46  */
     47 
     48 /*
     49  *	push variables around via the routine func() on the file
     50  * channel file.  func() is either read or write.
     51  */
     52 bool
     53 varpush(int file, ssize_t (*func)(int, const struct iovec *, int))
     54 {
     55 	int		temp;
     56 	const struct iovec vec[] = {
     57 		{ (void *) &Debug, sizeof Debug },
     58 		{ (void *) &Finished, sizeof Finished },
     59 		{ (void *) &Order, sizeof Order },
     60 		{ (void *) &End, sizeof End },
     61 		{ (void *) &On_exit, sizeof On_exit },
     62 		{ (void *) &Handstart, sizeof Handstart },
     63 		{ (void *) &Numgos, sizeof Numgos },
     64 		{ (void *) Numseen, sizeof Numseen },
     65 		{ (void *) &Play, sizeof Play },
     66 		{ (void *) &Window, sizeof Window },
     67 		{ (void *) Deck, sizeof Deck },
     68 		{ (void *) &Discard, sizeof Discard },
     69 		{ (void *) Player, sizeof Player }
     70 	};
     71 
     72 	if (((func)(file, vec, sizeof(vec) / sizeof(vec[0]))) < 0) {
     73 		error("%s", strerror(errno));
     74 		return FALSE;
     75 	}
     76 	if (func == readv) {
     77 		if ((read(file, (void *) &temp, sizeof temp)) < 0) {
     78 			error("%s", strerror(errno));
     79 			return FALSE;
     80 		}
     81 		Topcard = &Deck[temp];
     82 #ifdef DEBUG
     83 		if (Debug) {
     84 			char	buf[80], *bp;
     85 over:
     86 			printf("Debug file:");
     87 			fgets(buf, (int)sizeof(buf), stdin);
     88 			if ((bp = strchr(buf, '\n')) != NULL)
     89 				*bp = '\0';
     90 			if ((outf = fopen(buf, "w")) == NULL) {
     91 				warn("%s", buf);
     92 				goto over;
     93 			}
     94 			if (strcmp(buf, _PATH_DEVNULL) != 0)
     95 				setbuf(outf, NULL);
     96 		}
     97 #endif
     98 	} else {
     99 		temp = Topcard - Deck;
    100 		if ((write(file, (void *) &temp, sizeof temp)) < 0) {
    101 			error("%s", strerror(errno));
    102 			return FALSE;
    103 		}
    104 	}
    105 	return TRUE;
    106 }
    107