1 /**************************************************************************** 2 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 31 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32 * and: Thomas E. Dickey 2002 * 33 ****************************************************************************/ 34 35 /* 36 * lib_kernel.c 37 * 38 * Misc. low-level routines: 39 * erasechar() 40 * killchar() 41 * flushinp() 42 * 43 * The baudrate() and delay_output() functions could logically live here, 44 * but are in other modules to reduce the static-link size of programs 45 * that use only these facilities. 46 */ 47 48 #include <curses.priv.h> 49 #include <term.h> /* cur_term */ 50 51 MODULE_ID("$Id: lib_kernel.c,v 1.24 2004/05/08 17:11:21 tom Exp $") 52 53 static int 54 _nc_vdisable(void) 55 { 56 int value = -1; 57 #if defined(_POSIX_VDISABLE) && HAVE_UNISTD_H 58 value = _POSIX_VDISABLE; 59 #endif 60 #if defined(_PC_VDISABLE) 61 if (value == -1) { 62 value = fpathconf(0, _PC_VDISABLE); 63 if (value == -1) { 64 value = 0377; 65 } 66 } 67 #elif defined(VDISABLE) 68 if (value == -1) 69 value = VDISABLE; 70 #endif 71 return value; 72 } 73 74 /* 75 * erasechar() 76 * 77 * Return erase character as given in cur_term->Ottyb. 78 * 79 */ 80 81 NCURSES_EXPORT(char) 82 erasechar(void) 83 { 84 int result = ERR; 85 T((T_CALLED("erasechar()"))); 86 87 if (cur_term != 0) { 88 #ifdef TERMIOS 89 result = cur_term->Ottyb.c_cc[VERASE]; 90 if (result == _nc_vdisable()) 91 result = ERR; 92 #else 93 result = cur_term->Ottyb.sg_erase; 94 #endif 95 } 96 returnCode(result); 97 } 98 99 /* 100 * killchar() 101 * 102 * Return kill character as given in cur_term->Ottyb. 103 * 104 */ 105 106 NCURSES_EXPORT(char) 107 killchar(void) 108 { 109 int result = ERR; 110 T((T_CALLED("killchar()"))); 111 112 if (cur_term != 0) { 113 #ifdef TERMIOS 114 result = cur_term->Ottyb.c_cc[VKILL]; 115 if (result == _nc_vdisable()) 116 result = ERR; 117 #else 118 result = cur_term->Ottyb.sg_kill; 119 #endif 120 } 121 returnCode(result); 122 } 123 124 /* 125 * flushinp() 126 * 127 * Flush any input on cur_term->Filedes 128 * 129 */ 130 131 NCURSES_EXPORT(int) 132 flushinp(void) 133 { 134 T((T_CALLED("flushinp()"))); 135 136 if (cur_term != 0) { 137 #ifdef TERMIOS 138 tcflush(cur_term->Filedes, TCIFLUSH); 139 #else 140 errno = 0; 141 do { 142 ioctl(cur_term->Filedes, TIOCFLUSH, 0); 143 } while 144 (errno == EINTR); 145 #endif 146 if (SP) { 147 SP->_fifohead = -1; 148 SP->_fifotail = 0; 149 SP->_fifopeek = 0; 150 } 151 returnCode(OK); 152 } 153 returnCode(ERR); 154 } 155