#include <errno.h>
#include <fcntl.h>
#include "syscall.h"
-#include "libc.h"
int __dup3(int old, int new, int flags)
{
int r;
+#ifdef SYS_dup2
if (old==new) return __syscall_ret(-EINVAL);
if (flags & O_CLOEXEC) {
while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY);
}
while ((r=__syscall(SYS_dup2, old, new))==-EBUSY);
if (flags & O_CLOEXEC) __syscall(SYS_fcntl, new, F_SETFD, FD_CLOEXEC);
+#else
+ while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY);
+#endif
return __syscall_ret(r);
}