contrib/tcsh-6/tc.disc.c

   1 /* $Header: /p/tcsh/cvsroot/tcsh/tc.disc.c,v 3.17 2006/03/02 18:46:45 christos Exp $ */
   2 /*
   3  * tc.disc.c: Functions to set/clear line disciplines
   4  *
   5  */
   6 /*-
   7  * Copyright (c) 1980, 1991 The Regents of the University of California.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34 #include "sh.h"
  35
  36 RCSID("$tcsh: tc.disc.c,v 3.17 2006/03/02 18:46:45 christos Exp $")
  37
  38 #ifdef OREO
  39 #include <compat.h>
  40 #endif  /* OREO */
  41
  42 #include "ed.h"
  43
  44 static int add_discipline = 0;  /* Did we add a line discipline  */
  45
  46 #if defined(IRIS4D) || defined(OREO) || defined(sonyrisc)
  47 # define HAVE_DISC
  48 # ifndef POSIX
  49 static struct termio otermiob;
  50 # else
  51 static struct termios otermiob;
  52 # endif /* POSIX */
  53 #endif  /* IRIS4D || OREO */
  54
  55 #ifdef _IBMR2
  56 # define HAVE_DISC
  57 char    strPOSIX[] = "posix";
  58 #endif  /* _IBMR2 */
  59
  60 #if !defined(HAVE_DISC) && defined(TIOCGETD) && defined(NTTYDISC)
  61 static int oldisc;
  62 #endif /* !HAVE_DISC && TIOCGETD && NTTYDISC */
  63
  64 int
  65 /*ARGSUSED*/
  66 setdisc(int f)
  67 {
  68 #ifdef IRIS4D
  69 # ifndef POSIX
  70     struct termio termiob;
  71 # else
  72     struct termios termiob;
  73 # endif
  74
  75     if (ioctl(f, TCGETA, (ioctl_t) & termiob) == 0) {
  76         otermiob = termiob;
  77 #if (SYSVREL < 4) || !defined(IRIS4D)
  78         if (termiob.c_line != NTTYDISC || termiob.c_cc[VSWTCH] == 0) { /*}*/
  79             termiob.c_line = NTTYDISC;
  80 #else
  81         if (termiob.c_cc[VSWTCH] == 0) {
  82 #endif
  83             termiob.c_cc[VSWTCH] = CSWTCH;
  84             if (ioctl(f, TCSETA, (ioctl_t) & termiob) != 0)
  85                 return (-1);
  86         }
  87     }
  88     else
  89         return (-1);
  90     add_discipline = 1;
  91     return (0);
  92 #endif /* IRIS4D */
  93
  94
  95 #ifdef OREO
  96 # ifndef POSIX
  97     struct termio termiob;
  98 # else
  99     struct termios termiob;
 100 # endif
 101
 102     struct ltchars ltcbuf;
 103
 104     if (ioctl(f, TCGETA, (ioctl_t) & termiob) == 0) {
 105         int comp = getcompat(COMPAT_BSDTTY);
 106         otermiob = termiob;
 107         if ((comp & COMPAT_BSDTTY) != COMPAT_BSDTTY) {
 108             (void) setcompat(comp | COMPAT_BSDTTY);
 109             if (ioctl(f, TIOCGLTC, (ioctl_t) & ltcbuf) != 0)
 110                 xprintf(CGETS(21, 1, "Couldn't get local chars.\n"));
 111             else {
 112                 ltcbuf.t_suspc = CTL_ESC('\032');        /* ^Z */
 113                 ltcbuf.t_dsuspc = CTL_ESC('\031');       /* ^Y */
 114                 ltcbuf.t_rprntc = CTL_ESC('\022');       /* ^R */
 115                 ltcbuf.t_flushc = CTL_ESC('\017');       /* ^O */
 116                 ltcbuf.t_werasc = CTL_ESC('\027');       /* ^W */
 117                 ltcbuf.t_lnextc = CTL_ESC('\026');       /* ^V */
 118                 if (ioctl(f, TIOCSLTC, (ioctl_t) & ltcbuf) != 0)
 119                     xprintf(CGETS(21, 2, "Couldn't set local chars.\n"));
 120             }
 121             termiob.c_cc[VSWTCH] = '\0';
 122             if (ioctl(f, TCSETAF, (ioctl_t) & termiob) != 0)
 123                 return (-1);
 124         }
 125     }
 126     else
 127         return (-1);
 128     add_discipline = 1;
 129     return (0);
 130 #endif                          /* OREO */
 131
 132
 133 #ifdef _IBMR2
 134     union txname tx;
 135
 136     tx.tx_which = 0;
 137
 138     if (ioctl(f, TXGETLD, (ioctl_t) & tx) == 0) {
 139         if (strcmp(tx.tx_name, strPOSIX) != 0)
 140             if (ioctl(f, TXADDCD, (ioctl_t) strPOSIX) == 0) {
 141                 add_discipline = 1;
 142                 return (0);
 143             }
 144         return (0);
 145     }
 146     else
 147         return (-1);
 148 #endif  /* _IBMR2 */
 149
 150 #ifndef HAVE_DISC
 151 # if defined(TIOCGETD) && defined(NTTYDISC)
 152     if (ioctl(f, TIOCGETD, (ioctl_t) & oldisc) == 0) {
 153         if (oldisc != NTTYDISC) {
 154             int     ldisc = NTTYDISC;
 155
 156             if (ioctl(f, TIOCSETD, (ioctl_t) & ldisc) != 0)
 157                 return (-1);
 158             add_discipline = 1;
 159         }
 160         else
 161             oldisc = -1;
 162         return (0);
 163     }
 164     else
 165         return (-1);
 166 # else
 167     USE(f);
 168     return (0);
 169 # endif /* TIOCGETD && NTTYDISC */
 170 #endif  /* !HAVE_DISC */
 171 } /* end setdisc */
 172
 173
 174 int
 175 /*ARGSUSED*/
 176 resetdisc(int f)
 177 {
 178     if (add_discipline) {
 179         add_discipline = 0;
 180 #if defined(OREO) || defined(IRIS4D)
 181         return (ioctl(f, TCSETAF, (ioctl_t) & otermiob));
 182 #endif /* OREO || IRIS4D */
 183
 184 #ifdef _IBMR2
 185         return (ioctl(f, TXDELCD, (ioctl_t) strPOSIX));
 186 #endif /* _IBMR2 */
 187
 188 #ifndef HAVE_DISC
 189 # if defined(TIOCSETD) && defined(NTTYDISC)
 190         return (ioctl(f, TIOCSETD, (ioctl_t) & oldisc));
 191 # endif /* TIOCSETD && NTTYDISC */
 192 #endif /* !HAVE_DISC */
 193     }
 194     USE(f);
 195     return (0);
 196 } /* end resetdisc */