1 /* 2 * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifdef HAVE_CONFIG_H 35 #include <config.h> 36 RCSID("$Id: get_window_size.c,v 1.9 1999/12/02 16:58:46 joda Exp $"); 37 #endif 38 39 #include <stdlib.h> 40 #ifdef HAVE_UNISTD_H 41 #include <unistd.h> 42 #endif 43 #ifdef HAVE_SYS_TYPES_H 44 #include <sys/types.h> 45 #endif 46 47 #if 0 /* Where were those needed? /confused */ 48 #ifdef HAVE_SYS_PROC_H 49 #include <sys/proc.h> 50 #endif 51 52 #ifdef HAVE_SYS_TTY_H 53 #include <sys/tty.h> 54 #endif 55 #endif 56 57 #ifdef HAVE_TERMIOS_H 58 #include <termios.h> 59 #endif 60 61 #include <roken.h> 62 63 int 64 get_window_size(int fd, struct winsize *wp) 65 { 66 int ret = -1; 67 68 memset(wp, 0, sizeof(*wp)); 69 70 #if defined(TIOCGWINSZ) 71 ret = ioctl(fd, TIOCGWINSZ, wp); 72 #elif defined(TIOCGSIZE) 73 { 74 struct ttysize ts; 75 76 ret = ioctl(fd, TIOCGSIZE, &ts); 77 if(ret == 0) { 78 wp->ws_row = ts.ts_lines; 79 wp->ws_col = ts.ts_cols; 80 } 81 } 82 #elif defined(HAVE__SCRSIZE) 83 { 84 int dst[2]; 85 86 _scrsize(dst); 87 wp->ws_row = dst[1]; 88 wp->ws_col = dst[0]; 89 ret = 0; 90 } 91 #endif 92 if (ret != 0) { 93 char *s; 94 if((s = getenv("COLUMNS"))) 95 wp->ws_col = atoi(s); 96 if((s = getenv("LINES"))) 97 wp->ws_row = atoi(s); 98 if(wp->ws_col > 0 && wp->ws_row > 0) 99 ret = 0; 100 } 101 return ret; 102 } 103