athr_terminal_ioctl.c

#if !defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE < 200809L
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#endif

#include "athr_terminal_ioctl.h"
#include "athr_logger.h"
#include "athr_terminal.h"
#include <stdio.h>
#include <sys/ioctl.h>

#if defined(ATHR_OS_WIN32)
#include <windows.h>
#endif

#define error(msg) athr_logger_error(athr_logger_format(msg))

/* Source: wget2 */
unsigned athr_terminal_ioctl_width(void)
{
    struct winsize wsz;
    int fd = fileno(stderr);

    if (ioctl(fd, TIOCGWINSZ, &wsz) >= 0) return wsz.ws_col;

    error("ioctl failed");
    return athr_terminal_fallback_width();
}