Function dup2 [src]

Prototype

pub fn dup2(old: i32, new: i32) usize

Parameters

old: i32new: i32

Source

  pub fn dup2(old: i32, new: i32) usize {
    if (@hasField(SYS, "dup2")) {
        return syscall2(.dup2, @as(usize, @bitCast(@as(isize, old))), @as(usize, @bitCast(@as(isize, new))));
    } else {
        if (old == new) {
            if (std.debug.runtime_safety) {
                const rc = fcntl(F.GETFD, @as(fd_t, old), 0);
                if (@as(isize, @bitCast(rc)) < 0) return rc;
            }
            return @as(usize, @intCast(old));
        } else {
            return syscall3(.dup3, @as(usize, @bitCast(@as(isize, old))), @as(usize, @bitCast(@as(isize, new))), 0);
        }
    }
}  