2 * Copyright (c) 2010 Todd C. Miller <Todd.Miller@courtesan.com>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
16 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21 #include <sys/types.h>
22 #include <sys/ioctl.h>
31 #endif /* STDC_HEADERS */
34 #endif /* HAVE_UNISTD_H */
38 #include "sudo_debug.h"
40 /* Compatibility with older tty systems. */
41 #if !defined(TIOCGWINSZ) && defined(TIOCGSIZE)
42 # define TIOCGWINSZ TIOCGSIZE
43 # define winsize ttysize
44 # define ws_col ts_cols
45 # define ws_row ts_lines
50 get_ttysize_ioctl(int *rowp, int *colp)
53 debug_decl(get_ttysize_ioctl, SUDO_DEBUG_EXEC)
55 if (ioctl(STDERR_FILENO, TIOCGWINSZ, &wsize) == 0 &&
56 wsize.ws_row != 0 && wsize.ws_col != 0) {
65 get_ttysize_ioctl(int *rowp, int *colp)
69 #endif /* TIOCGWINSZ */
72 get_ttysize(int *rowp, int *colp)
74 debug_decl(fork_cmnd, SUDO_DEBUG_EXEC)
76 if (get_ttysize_ioctl(rowp, colp) == -1) {
79 /* Fall back on $LINES and $COLUMNS. */
80 if ((p = getenv("LINES")) == NULL || (*rowp = atoi(p)) <= 0)
82 if ((p = getenv("COLUMNS")) == NULL || (*colp = atoi(p)) <= 0)