C restore stdout to terminal

Question

I am working with a multi-thread program. First I redirect my stdout to a certain file. No problem there (I used `dup2(fd, 1)` where `fd` is the file descriptor for the file). Afterwards, I need to redirect my stdout to the terminal again. My first approach: ``` /*Declaration*/ fpost_t stream_sdout; /*code*/ if ( fgetpos( stdout, &stream_sdout) == -1 ) perror(Error:); ``` It says illegal seek. No idea why this is happening. But if I get this to work, then I only need to use `fsetpos(stdout, &stream_stdout)` and it should work. My second idea, was to to copy the stdout using `dup2(stdout, 4)` to the file descriptor table, at position 4. But that ain't working either. How can I switch the standard output back to its original destination (terminal, pipe, file, whatever)?

Accepted Answer

```
#include <unistd.h>

...

int saved_stdout;

...

/* Save current stdout for use later */
saved_stdout = dup(1);
dup2(my_temporary_stdout_fd, 1);

... do some work on your new stdout ...

/* Restore stdout */
dup2(saved_stdout, 1);
close(saved_stdout);
```

C restore stdout to terminal

Solution

Problem