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/*
* Copyright (c) 2010 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif /* STDC_HEADERS */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <termios.h>
#include "missing.h"
#include "sudo_debug.h"
/* Compatibility with older tty systems. */
#if !defined(TIOCGWINSZ) && defined(TIOCGSIZE)
# define TIOCGWINSZ TIOCGSIZE
# define winsize ttysize
# define ws_col ts_cols
# define ws_row ts_lines
#endif
#ifdef TIOCGWINSZ
static int
get_ttysize_ioctl(int *rowp, int *colp)
{
struct winsize wsize;
debug_decl(get_ttysize_ioctl, SUDO_DEBUG_EXEC)
if (ioctl(STDERR_FILENO, TIOCGWINSZ, &wsize) == 0 &&
wsize.ws_row != 0 && wsize.ws_col != 0) {
*rowp = wsize.ws_row;
*colp = wsize.ws_col;
debug_return_int(0);
}
debug_return_int(-1);
}
#else
static int
get_ttysize_ioctl(int *rowp, int *colp)
{
return -1;
}
#endif /* TIOCGWINSZ */
void
get_ttysize(int *rowp, int *colp)
{
debug_decl(fork_cmnd, SUDO_DEBUG_EXEC)
if (get_ttysize_ioctl(rowp, colp) == -1) {
char *p;
/* Fall back on $LINES and $COLUMNS. */
if ((p = getenv("LINES")) == NULL || (*rowp = atoi(p)) <= 0)
*rowp = 24;
if ((p = getenv("COLUMNS")) == NULL || (*colp = atoi(p)) <= 0)
*colp = 80;
}
debug_return;
}
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