是否可以检查将程序输出重定向到文件的控制台的宽度？

Question

GetConsoleScreenBufferInfo() returns error when initialized with standard output when program output is redirected to another command or a file.

Is there any way to get a handle to console in which the program runs and get its width no matter if program output is written on console or not ?

Maybe GetConsoleWindow() is here a help, but I don't know how to use handle that it produces to get the width.

Answer 1

Your question makes little sense. If output is redirected then your console window width doesn't matter at all. Only the console, if any, of the program that displays the redirected output matters. You can't guess the window size of, say, Notepad.

You can however get a handle for the console, you need to use CreateFile():

HANDLE hConsole = CreateFile(L"CONOUT$", 
    GENERIC_READ | GENERIC_WRITE,
    0, 0, OPEN_EXISTING, 0, 0);
CONSOLE_SCREEN_BUFFER_INFO info = {0};
BOOL ok = GetConsoleScreenBufferInfo(hConsole, &info);
printf("OK = %d, %d x %d\n", ok, 
    info.srWindow.Right - info.srWindow.Left + 1, 
    info.srWindow.Bottom - info.srWindow.Top + 1);

Output in redirected file:

OK = 1, 80 x 25

Answer 2

看一下GetConsoleScreenBufferInfo ，特别是CONSOLE_SCREEN_BUFFER的srWindow成员。