Redirect stdout of a killed executable

Question

I have a C file that looks like this:

#include <stdio.h>

int main(void)
{
   printf("Hello world\n");
   while (1);
   return 0;
}

And I would like to see "Hello world" printed in a new file. But it doesn't work when I try to redirect the standard output like this:

./hello_world >> logfile &

And then kill the program hello_world.

Answer 1

You need to flush stdout before the loop:

#include <stdio.h>

int main(void)
{
   printf("Hello world\n");
   fflush(stdout);
   while (1);
   return 0;
}