1: /*      $NetBSD: varpush.c,v 1.8 2004/01/27 20:30:30 jsm 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 1.8 2004/01/27 20:30:30 jsm 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(file, func)
   54:         int    file;
   55: #if defined(__linux__) && !defined(__GLIBC__)
   56:         ssize_t        (*func)(int, const struct iovec *, size_t); 
   57: #else
   58:         ssize_t        (*func)(int, const struct iovec *, int); 
   59: #endif
   60: {
   61:         int            temp;
   62:         const struct iovec vec[] = {
   63:                 { (void *) &Debug, sizeof Debug },
   64:                 { (void *) &Finished, sizeof Finished },
   65:                 { (void *) &Order, sizeof Order },
   66:                 { (void *) &End, sizeof End },
   67:                 { (void *) &On_exit, sizeof On_exit },
   68:                 { (void *) &Handstart, sizeof Handstart },
   69:                 { (void *) &Numgos, sizeof Numgos },
   70:                 { (void *) Numseen, sizeof Numseen },
   71:                 { (void *) &Play, sizeof Play },
   72:                 { (void *) &Window, sizeof Window },
   73:                 { (void *) Deck, sizeof Deck },
   74:                 { (void *) &Discard, sizeof Discard },
   75:                 { (void *) Player, sizeof Player }
   76:         };
   77: 
   78:         if (((func)(file, vec, sizeof(vec) / sizeof(vec[0]))) < 0) {
   79:                 error(strerror(errno));
   80:                 return FALSE;
   81:         }
   82:         if (func == readv) {
   83:                 if ((read(file, (void *) &temp, sizeof temp)) < 0) {
   84:                         error(strerror(errno));
   85:                         return FALSE;
   86:                 }
   87:                 Topcard = &Deck[temp];
   88: #ifdef DEBUG
   89:                 if (Debug) {
   90:                         char buf[80];
   91: over:
   92:                         printf("Debug file:");
   93:                         gets(buf);
   94:                         if ((outf = fopen(buf, "w")) == NULL) {
   95:                                 warn("%s", buf);
   96:                                 goto over;
   97:                         }
   98:                         if (strcmp(buf, _PATH_DEVNULL) != 0)
   99:                                 setbuf(outf, (char *)NULL);
  100:                 }
  101: #endif
  102:         } else {
  103:                 temp = Topcard - Deck;
  104:                 if ((write(file, (void *) &temp, sizeof temp)) < 0) {
  105:                         error(strerror(errno));
  106:                         return FALSE;
  107:                 }
  108:         }
  109:         return TRUE;
  110: }