syscalls: dup and dup2

src/sys/syscalls/dup.c

@@ -0,0 +1,15 @@
+#include <kernel/syscalls.h>
+#include <kernel/fd.h>
+#include <arch/cls.h>
+
+syscallret syscall_dup(int oldfd){
+	syscallret retv;
+	retv.errno = fd_duplicate(&arch_getcls()->thread->proc->fdtable, oldfd, ~0, 1, &retv.ret);
+	return retv;
+}
+
+syscallret syscall_dup2(int oldfd, int newfd){
+	syscallret retv;
+	retv.errno = fd_duplicate(&arch_getcls()->thread->proc->fdtable, oldfd, newfd, 2, &retv.ret);
+	return retv;
+}