1 /* $OpenBSD: lib_kernel.c,v 1.3 2010/01/12 23:22:06 nicm Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /**************************************************************************** 32 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 33 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 34 * and: Thomas E. Dickey 2002 * 35 ****************************************************************************/ 36 37 /* 38 * lib_kernel.c 39 * 40 * Misc. low-level routines: 41 * erasechar() 42 * killchar() 43 * flushinp() 44 * 45 * The baudrate() and delay_output() functions could logically live here, 46 * but are in other modules to reduce the static-link size of programs 47 * that use only these facilities. 48 */ 49 50 #include <curses.priv.h> 51 #include <term.h> /* cur_term */ 52 53 MODULE_ID("$Id: lib_kernel.c,v 1.3 2010/01/12 23:22:06 nicm Exp $") 54 55 static int 56 _nc_vdisable(void) 57 { 58 int value = -1; 59 #if defined(_POSIX_VDISABLE) && HAVE_UNISTD_H 60 value = _POSIX_VDISABLE; 61 #endif 62 #if defined(_PC_VDISABLE) 63 if (value == -1) { 64 value = fpathconf(0, _PC_VDISABLE); 65 if (value == -1) { 66 value = 0377; 67 } 68 } 69 #elif defined(VDISABLE) 70 if (value == -1) 71 value = VDISABLE; 72 #endif 73 return value; 74 } 75 76 /* 77 * erasechar() 78 * 79 * Return erase character as given in cur_term->Ottyb. 80 * 81 */ 82 83 NCURSES_EXPORT(char) 84 erasechar(void) 85 { 86 int result = ERR; 87 T((T_CALLED("erasechar()"))); 88 89 if (cur_term != 0) { 90 #ifdef TERMIOS 91 result = cur_term->Ottyb.c_cc[VERASE]; 92 if (result == _nc_vdisable()) 93 result = ERR; 94 #else 95 result = cur_term->Ottyb.sg_erase; 96 #endif 97 } 98 returnCode(result); 99 } 100 101 /* 102 * killchar() 103 * 104 * Return kill character as given in cur_term->Ottyb. 105 * 106 */ 107 108 NCURSES_EXPORT(char) 109 killchar(void) 110 { 111 int result = ERR; 112 T((T_CALLED("killchar()"))); 113 114 if (cur_term != 0) { 115 #ifdef TERMIOS 116 result = cur_term->Ottyb.c_cc[VKILL]; 117 if (result == _nc_vdisable()) 118 result = ERR; 119 #else 120 result = cur_term->Ottyb.sg_kill; 121 #endif 122 } 123 returnCode(result); 124 } 125 126 /* 127 * flushinp() 128 * 129 * Flush any input on cur_term->Filedes 130 * 131 */ 132 133 NCURSES_EXPORT(int) 134 flushinp(void) 135 { 136 T((T_CALLED("flushinp()"))); 137 138 if (cur_term != 0) { 139 #ifdef TERMIOS 140 tcflush(cur_term->Filedes, TCIFLUSH); 141 #else 142 errno = 0; 143 do { 144 ioctl(cur_term->Filedes, TIOCFLUSH, 0); 145 } while 146 (errno == EINTR); 147 #endif 148 if (SP) { 149 SP->_fifohead = -1; 150 SP->_fifotail = 0; 151 SP->_fifopeek = 0; 152 } 153 returnCode(OK); 154 } 155 returnCode(ERR); 156 } 157