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- /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
- #include <libc/stubs.h>
- #include <unistd.h>
- #include <fcntl.h>
- #include <dpmi.h>
- #include <errno.h>
- #include <io.h>
- #include <libc/dosio.h>
-
- int
- dup2(int fd, int newfd)
- {
- __dpmi_regs r;
- if (fd == newfd)
- return newfd;
- __file_handle_set(newfd, __file_handle_modes[fd] ^ (O_BINARY|O_TEXT));
- r.h.ah = 0x46;
- r.x.bx = fd;
- r.x.cx = newfd;
- __dpmi_int(0x21, &r);
- if (r.x.flags & 1)
- {
- errno = __doserr_to_errno(r.x.ax);
- return -1;
- }
- setmode(newfd, __file_handle_modes[fd]);
- return newfd;
- }
-