toaruos/libc/unistd/dup2.c

#include <unistd.h>
#include <syscall.h>
#include <syscall_nums.h>

DEFN_SYSCALL2(dup2, SYS_DUP2, int, int);

int dup2(int oldfd, int newfd) {
	return syscall_dup2(oldfd, newfd);
}

int dup(int oldfd) {
	return dup2(oldfd, -1);
}