xref: /freebsd/crypto/heimdal/lib/roken/get_window_size.c (revision 9a14aa017b21c292740c00ee098195cd46642730)
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 21005 2007-06-08 01:54:35Z lha $");
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 ROKEN_LIB_FUNCTION
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