#include <spawn.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>

#define A(x) \
    if ((errno = (x)) != 0) \
        perror(#x)
int
main(int argc, char *argv[])
{
    posix_spawn_file_actions_t fa;
    pid_t pid;

    posix_spawn_file_actions_init(&fa);
    A(posix_spawn_file_actions_addclose(&fa, 0));
    A(posix_spawn_file_actions_adddup2(&fa, 2, 3));
    A(posix_spawn_file_actions_addopen(&fa, 5, "test.c", O_RDONLY, 0));
    A(posix_spawn_file_actions_addopen(&fa, 4, "/usr", O_DIRECTORY, 0));
    A(posix_spawn_file_actions_addchdir_np(&fa, "/"));
    A(posix_spawn_file_actions_addfchdir_np(&fa, 4));
    A(posix_spawn_file_actions_addclose(&fa, 5));
    A(posix_spawn_file_actions_adddup2(&fa, 2, 10));
    A(posix_spawn_file_actions_adddup2(&fa, 2, 11));
    A(posix_spawn_file_actions_adddup2(&fa, 2, 12));
    A(posix_spawn_file_actions_adddup2(&fa, 2, 13));
    A(posix_spawn_file_actions_adddup2(&fa, 2, 14));
    A(posix_spawn_file_actions_adddup2(&fa, 2, 15));
    posix_spawn(&pid, "/bin/false", &fa, 0, (char*[]){"false", 0}, (char*[]){0});
    posix_spawn_file_actions_destroy(&fa);
    return 0;
}