/*
* No copyright is claimed. This code is in the public domain; do with
* it what you wish.
*
* Written by Karel Zak <kzak@redhat.com>
*/
#include <ctype.h>
#include "c.h"
#include "ttyutils.h"
int get_terminal_width(void)
{
#ifdef TIOCGSIZE
struct ttysize t_win;
#endif
#ifdef TIOCGWINSZ
struct winsize w_win;
#endif
const char *cp;
#ifdef TIOCGSIZE
if (ioctl (0, TIOCGSIZE, &t_win) == 0)
return t_win.ts_cols;
#endif
#ifdef TIOCGWINSZ
if (ioctl (0, TIOCGWINSZ, &w_win) == 0)
return w_win.ws_col;
#endif
cp = getenv("COLUMNS");
if (cp) {
char *end = NULL;
long c;
errno = 0;
c = strtol(cp, &end, 10);
if (errno == 0 && end && *end == '\0' && end > cp &&
c > 0 && c <= INT_MAX)
return c;
}
return 0;
}
int get_terminal_name(const char **path,
const char **name,
const char **number)
{
const char *tty;
const char *p;
if (name)
*name = NULL;
if (path)
*path = NULL;
if (number)
*number = NULL;
tty = ttyname(STDERR_FILENO);
if (!tty)
return -1;
if (path)
*path = tty;
tty = strncmp(tty, "/dev/", 5) == 0 ? tty + 5 : tty;
if (name)
*name = tty;
if (number) {
for (p = tty; p && *p; p++) {
if (isdigit(*p)) {
*number = p;
break;
}
}
}
return 0;
}
#ifdef TEST_PROGRAM
# include <stdlib.h>
int main(void)
{
const char *path, *name, *num;
if (get_terminal_name(&path, &name, &num) == 0) {
fprintf(stderr, "tty path: %s\n", path);
fprintf(stderr, "tty name: %s\n", name);
fprintf(stderr, "tty number: %s\n", num);
}
fprintf(stderr, "tty width: %d\n", get_terminal_width());
return EXIT_SUCCESS;
}
#endif
