使用 termcaps 删除 output

Question

I'm trying to delete the characters from the cursor to the end of line, the problem is when I print a new line ('\n') after, the deleted characters reappear, I also tried to print a null character before the new line and it does the same. Minimal code:

#include <ncurses.h>
#include <term.h>
#include <unistd.h>
#include <stdlib.h>

int ft_putchar(int ch)
{
    char c = (char)ch;
    return (write(1, &c, 1));
}

int main(void)
{
    tgetent(getenv("TERM"), NULL);
    char * LE = tgetstr("LE", NULL); // termcap for cursor left
    char * kL = tgetstr("kL", NULL); // termcap for cursor right

    write(1, "Hello World", 11);
    tputs(tparm(LE, 5), 1, ft_putchar); // move the cursor 5 cases left
    tputs(kL, 1, ft_putchar); // delete to end of line
    write(1, "\n", 1);
    return (0);
}

Output: Hello World

And without the last write(1, "\n", 1)

Output: Hello

I spent hours to discover that the new line was causing that, now I can't figure out how to do it.

And I also tried write(1, "\0\n", 2) and it does the same.

Any clues of how to avoid that?

Answer 1

Look at the ce termcap entry, that means clear from cursor to end of line.