Get terminal window size

來源:互聯網
上載者:User

下面這個代碼是用來擷取當前terminal window的大小的

1. 用ioctl來擷取大小

2. 當視窗大小變化時,會收到SIGWINCH的訊號

 

/*
 * =====================================================================================
 *
 *       Filename:  window_size.c
 *
 *    Description: 
 *
 *        Version:  1.0
 *        Created:  09/15/2010 01:25:56 PM
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  YOUR NAME (),
 *        Company: 
 *
 * =====================================================================================
 */
#include <termios.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <signal.h>
#ifndef TIOCGWINSZ
#include <sys/ioctl.h>
#endif

static void
pr_winsize(int fd)
{
    struct winsize size;

    if (ioctl(fd, TIOCGWINSZ, (char*)&size) < 0)
        perror("TIOCGWINSZ error");
    printf("%d rows, %d columns/n", size.ws_row, size.ws_col);
}

static void
sig_winch(int signo)
{
    printf("SIGWINCH recived/n");
    pr_winsize(STDIN_FILENO);
}

int main(void)
{
    if (isatty(STDIN_FILENO) == 0)
        exit(1);
    if (signal(SIGWINCH, sig_winch) == SIG_ERR)
        perror("signal error");
    pr_winsize(STDIN_FILENO);
    for (;;)
        pause();
}

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