lib/libc/termios/tcsetattr.c

   1 /*      $NetBSD: tcsetattr.c,v 1.8 2003/08/07 16:44:14 agc Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1989, 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 #if defined(LIBC_SCCS) && !defined(lint)
  34 #if 0
  35 static char sccsid[] = "@(#)termios.c   8.2 (Berkeley) 2/21/94";
  36 #else
  37 __RCSID("$NetBSD: tcsetattr.c,v 1.8 2003/08/07 16:44:14 agc Exp $");
  38 #endif
  39 #endif /* LIBC_SCCS and not lint */
  40
  41 #include "namespace.h"
  42 #include <sys/ioctl.h>
  43
  44 #include <assert.h>
  45 #include <errno.h>
  46 #include <stdio.h>
  47 #include <termios.h>
  48
  49 #ifdef __weak_alias
  50 __weak_alias(tcsetattr,_tcsetattr)
  51 #endif
  52
  53 int
  54 tcsetattr(fd, opt, t)
  55         int fd, opt;
  56         const struct termios *t;
  57 {
  58 #ifndef __minix
  59         struct termios localterm;
  60 #endif
  61
  62         _DIAGASSERT(fd != -1);
  63         _DIAGASSERT(t != NULL);
  64
  65 #ifndef __minix
  66         if (opt & TCSASOFT) {
  67                 localterm = *t;
  68                 localterm.c_cflag |= CIGNORE;
  69                 t = &localterm;
  70         }
  71 #else /* __minix */
  72 #define TCSASOFT        0
  73 #endif /* __minix */
  74         switch (opt & ~TCSASOFT) {
  75         case TCSANOW:
  76                 return (ioctl(fd, TIOCSETA, __UNCONST(t)));
  77         case TCSADRAIN:
  78                 return (ioctl(fd, TIOCSETAW, __UNCONST(t)));
  79         case TCSAFLUSH:
  80                 return (ioctl(fd, TIOCSETAF, __UNCONST(t)));
  81         default:
  82                 errno = EINVAL;
  83                 return (-1);
  84         }
  85 }