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 */ 197