How to know the number of lines in a text console

Hi,

How can I know the number of lines of the screen when working in a text environment (non X Windows).

Thanks in advance

You can't - in standard C anyway.

You could try using a library like ncurses, but that adds quite a bit to your code.

First question is, why do you want to know?

Without messing around with terminal calls, most modern unix shells
(POSIX (sh) and Korn (ksh) ) support the LINES variable

A crude hack:

Code:

---

#include <stdio.h>

int MAX_LINES(void)  // number of terminal lines
{
       
        char tmp[24]={0x0};
        FILE *p=popen("echo $LINES","r");
        fgets(tmp,sizeof(tmp),p);
        return atoi(tmp);
}

---

This is not something to call repeatedly, it creates a process, so is slow

why not just use getenv("LINES");

moi - yes.