1 /* $NetBSD: get_window_size.c,v 1.2 2011/04/14 18:12:08 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 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 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <config.h> 37 38 #include <stdlib.h> 39 #ifdef HAVE_UNISTD_H 40 #include <unistd.h> 41 #endif 42 #ifdef HAVE_SYS_TYPES_H 43 #include <sys/types.h> 44 #endif 45 46 #if 0 /* Where were those needed? /confused */ 47 #ifdef HAVE_SYS_PROC_H 48 #include <sys/proc.h> 49 #endif 50 51 #ifdef HAVE_SYS_TTY_H 52 #include <sys/tty.h> 53 #endif 54 #endif 55 56 #ifdef HAVE_TERMIOS_H 57 #include <termios.h> 58 #endif 59 60 #include <krb5/roken.h> 61 62 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 63 get_window_size(int fd, int *lines, int *columns) 64 { 65 int ret; 66 char *s; 67 68 #if defined(TIOCGWINSZ) 69 { 70 struct winsize ws; 71 ret = ioctl(fd, TIOCGWINSZ, &ws); 72 if (ret != -1) { 73 if (lines) 74 *lines = ws.ws_row; 75 if (columns) 76 *columns = ws.ws_col; 77 return 0; 78 } 79 } 80 #elif defined(TIOCGSIZE) 81 { 82 struct ttysize ts; 83 84 ret = ioctl(fd, TIOCGSIZE, &ts); 85 if (ret != -1) { 86 if (lines) 87 *lines = ts.ws_lines; 88 if (columns) 89 *columns = ts.ts_cols; 90 return 0; 91 } 92 } 93 #elif defined(HAVE__SCRSIZE) 94 { 95 int dst[2]; 96 97 _scrsize(dst); 98 if (lines) 99 *lines = dst[1]; 100 if (columns) 101 *columns = dst[0]; 102 return 0; 103 } 104 #elif defined(_WIN32) 105 { 106 intptr_t fh = 0; 107 CONSOLE_SCREEN_BUFFER_INFO sb_info; 108 109 fh = _get_osfhandle(fd); 110 if (fh != (intptr_t) INVALID_HANDLE_VALUE && 111 GetConsoleScreenBufferInfo((HANDLE) fh, &sb_info)) { 112 wp->ws_row = 1 + sb_info.srWindow.Bottom - sb_info.srWindow.Top; 113 wp->ws_col = 1 + sb_info.srWindow.Right - sb_info.srWindow.Left; 114 115 ret = 0; 116 } 117 } 118 #endif 119 if (columns) { 120 if ((s = getenv("COLUMNS"))) 121 *columns = atoi(s); 122 else 123 return -1; 124 } 125 if (lines) { 126 if ((s = getenv("LINES"))) 127 *lines = atoi(s); 128 else 129 return -1; 130 } 131 return 0; 132 } 133