8 int __dup3(int old, int new, int flags)
11 if (old==new) return __syscall_ret(-EINVAL);
12 if (flags & O_CLOEXEC) {
13 while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY);
14 if (r!=-ENOSYS) return __syscall_ret(r);
16 while ((r=__syscall(SYS_dup2, old, new))==-EBUSY);
17 if (flags & O_CLOEXEC) __syscall(SYS_fcntl, new, F_SETFD, FD_CLOEXEC);
18 return __syscall_ret(r);
21 weak_alias(__dup3, dup3);