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
varpush(int file,ssize_t (* func)(int,const struct iovec *,int))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