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Redirect stdin stdout

Arthur Sonzogni edited this page 2023-08-19 17:14:13 +02:00

FTXUI communicates with the terminal using stdout / stdin. It means if you redirect one of them toward a file or another application, then the UI will be read/written directly into them!

It exist some platform specific ways (Linux) to redirect back stdout/stdint toward the terminal:

#include <unistd.h> // dup
#include <fcntl.h>  // fileno
#include <cstdio>   // freopen

  [...]
  // Backup the current file descriptor for stdin/stdout
  auto old_stdout = dup(fileno(stdout));
  auto old_stdin = dup(fileno(stdin));


  // Reroute stdin and stdout toward the console.
  stdin = freopen("/dev/tty", "r", stdin);
  stdout = freopen("/dev/tty", "w", stdout);