1168 lines
29 KiB
C++
1168 lines
29 KiB
C++
/* fhandler_serial.cc
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
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2007, 2008, 2009, 2011, 2012 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <unistd.h>
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#include <sys/param.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "path.h"
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#include "fhandler.h"
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#include "sigproc.h"
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#include "pinfo.h"
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#include <asm/socket.h>
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#include <devioctl.h>
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#include <ntddser.h>
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#include "cygwait.h"
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/**********************************************************************/
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/* fhandler_serial */
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fhandler_serial::fhandler_serial ()
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: fhandler_base (), vmin_ (0), vtime_ (0), pgrp_ (myself->pgid)
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{
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need_fork_fixup (true);
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}
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void
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fhandler_serial::overlapped_setup ()
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{
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memset (&io_status, 0, sizeof (io_status));
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io_status.hEvent = CreateEvent (&sec_none_nih, TRUE, FALSE, NULL);
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ProtectHandle (io_status.hEvent);
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overlapped_armed = 0;
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}
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void __reg3
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fhandler_serial::raw_read (void *ptr, size_t& ulen)
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{
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int tot;
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DWORD n;
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size_t minchars = vmin_ ? MIN (vmin_, ulen) : ulen;
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debug_printf ("ulen %ld, vmin_ %ld, vtime_ %u, hEvent %p",
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ulen, vmin_, vtime_, io_status.hEvent);
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if (!overlapped_armed)
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{
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SetCommMask (get_handle (), EV_RXCHAR);
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ResetEvent (io_status.hEvent);
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}
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for (n = 0, tot = 0; ulen; ulen -= n, ptr = (char *) ptr + n)
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{
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COMSTAT st;
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DWORD inq = vmin_ ? minchars : vtime_ ? ulen : 1;
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n = 0;
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if (vtime_) // non-interruptible -- have to use kernel timeouts
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overlapped_armed = -1;
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if (!ClearCommError (get_handle (), &ev, &st))
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goto err;
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else if (ev)
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termios_printf ("error detected %x", ev);
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else if (st.cbInQue && !vtime_)
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inq = st.cbInQue;
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else if (!is_nonblocking () && !overlapped_armed)
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{
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if ((size_t) tot >= minchars)
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break;
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else if (WaitCommEvent (get_handle (), &ev, &io_status))
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{
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debug_printf ("WaitCommEvent succeeded: ev %x", ev);
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if (!ev)
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continue;
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}
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else if (GetLastError () != ERROR_IO_PENDING)
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goto err;
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else
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{
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overlapped_armed = 1;
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switch (cygwait (io_status.hEvent))
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{
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case WAIT_OBJECT_0:
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if (!GetOverlappedResult (get_handle (), &io_status, &n,
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FALSE))
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goto err;
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debug_printf ("n %u, ev %x", n, ev);
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break;
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case WAIT_SIGNALED:
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tot = -1;
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PurgeComm (get_handle (), PURGE_RXABORT);
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overlapped_armed = 0;
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set_sig_errno (EINTR);
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goto out;
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case WAIT_CANCELED:
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PurgeComm (get_handle (), PURGE_RXABORT);
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overlapped_armed = 0;
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pthread::static_cancel_self ();
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/*NOTREACHED*/
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default:
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goto err;
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}
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}
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}
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overlapped_armed = 0;
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ResetEvent (io_status.hEvent);
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if (inq > ulen)
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inq = ulen;
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debug_printf ("inq %u", inq);
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if (ReadFile (get_handle (), ptr, inq, &n, &io_status))
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/* Got something */;
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else if (GetLastError () != ERROR_IO_PENDING)
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goto err;
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else if (is_nonblocking ())
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{
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/* Use CancelIo rather than PurgeComm (PURGE_RXABORT) since
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PurgeComm apparently discards in-flight bytes while CancelIo
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only stops the overlapped IO routine. */
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CancelIo (get_handle ());
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if (GetOverlappedResult (get_handle (), &io_status, &n, FALSE))
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tot = n;
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else if (GetLastError () != ERROR_OPERATION_ABORTED)
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goto err;
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if (tot == 0)
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{
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tot = -1;
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set_errno (EAGAIN);
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}
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goto out;
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}
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else if (!GetOverlappedResult (get_handle (), &io_status, &n, TRUE))
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goto err;
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tot += n;
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debug_printf ("vtime_ %u, vmin_ %lu, n %u, tot %d", vtime_, vmin_, n, tot);
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if (vtime_ || !vmin_ || !n)
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break;
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continue;
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err:
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debug_printf ("err %E");
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if (GetLastError () != ERROR_OPERATION_ABORTED)
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{
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PurgeComm (get_handle (), PURGE_RXABORT);
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tot = -1;
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__seterrno ();
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break;
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}
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n = 0;
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}
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out:
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ulen = tot;
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}
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/* Cover function to WriteFile to provide Posix interface and semantics
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(as much as possible). */
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ssize_t __reg3
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fhandler_serial::raw_write (const void *ptr, size_t len)
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{
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DWORD bytes_written;
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OVERLAPPED write_status;
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memset (&write_status, 0, sizeof (write_status));
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write_status.hEvent = CreateEvent (&sec_none_nih, TRUE, FALSE, NULL);
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ProtectHandle (write_status.hEvent);
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for (;;)
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{
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if (WriteFile (get_handle (), ptr, len, &bytes_written, &write_status))
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break;
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switch (GetLastError ())
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{
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case ERROR_OPERATION_ABORTED:
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DWORD ev;
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if (!ClearCommError (get_handle (), &ev, NULL))
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goto err;
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if (ev)
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termios_printf ("error detected %x", ev);
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continue;
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case ERROR_IO_PENDING:
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break;
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default:
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goto err;
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}
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if (!is_nonblocking ())
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{
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switch (cygwait (write_status.hEvent))
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{
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case WAIT_OBJECT_0:
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break;
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case WAIT_SIGNALED:
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PurgeComm (get_handle (), PURGE_TXABORT);
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set_sig_errno (EINTR);
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ForceCloseHandle (write_status.hEvent);
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return -1;
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case WAIT_CANCELED:
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PurgeComm (get_handle (), PURGE_TXABORT);
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pthread::static_cancel_self ();
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/*NOTREACHED*/
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default:
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goto err;
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}
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}
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if (!GetOverlappedResult (get_handle (), &write_status, &bytes_written, TRUE))
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goto err;
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break;
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}
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ForceCloseHandle (write_status.hEvent);
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return bytes_written;
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err:
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__seterrno ();
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ForceCloseHandle (write_status.hEvent);
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return -1;
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}
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int
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fhandler_serial::init (HANDLE f, DWORD flags, mode_t bin)
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{
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return open (flags, bin & (O_BINARY | O_TEXT));
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}
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int
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fhandler_serial::open (int flags, mode_t mode)
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{
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int res;
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COMMTIMEOUTS to;
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syscall_printf ("fhandler_serial::open (%s, %y, 0%o)",
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get_name (), flags, mode);
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if (!fhandler_base::open (flags, mode))
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return 0;
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res = 1;
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SetCommMask (get_handle (), EV_RXCHAR);
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overlapped_setup ();
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memset (&to, 0, sizeof (to));
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SetCommTimeouts (get_handle (), &to);
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/* Reset serial port to known state of 9600-8-1-no flow control
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on open for better behavior under Win 95.
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FIXME: This should only be done when explicitly opening the com
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port. It should not be reset if an fd is inherited.
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Using __progname in this way, to determine how far along in the
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initialization we are, is really a terrible kludge and should
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be fixed ASAP.
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*/
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if (reset_com && __progname)
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{
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DCB state;
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GetCommState (get_handle (), &state);
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syscall_printf ("setting initial state on %s (reset_com %d)",
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get_name (), reset_com);
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state.BaudRate = CBR_9600;
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state.ByteSize = 8;
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state.StopBits = ONESTOPBIT;
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state.Parity = NOPARITY; /* FIXME: correct default? */
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state.fBinary = TRUE; /* binary xfer */
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state.EofChar = 0; /* no end-of-data in binary mode */
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state.fNull = FALSE; /* don't discard nulls in binary mode */
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state.fParity = FALSE; /* ignore parity errors */
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state.fErrorChar = FALSE;
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state.fTXContinueOnXoff = TRUE; /* separate TX and RX flow control */
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state.fOutX = FALSE; /* disable transmission flow control */
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state.fInX = FALSE; /* disable reception flow control */
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state.XonChar = 0x11;
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state.XoffChar = 0x13;
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state.fOutxDsrFlow = FALSE; /* disable DSR flow control */
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state.fRtsControl = RTS_CONTROL_ENABLE; /* ignore lead control except
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DTR */
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state.fOutxCtsFlow = FALSE; /* disable output flow control */
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state.fDtrControl = DTR_CONTROL_ENABLE; /* assert DTR */
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state.fDsrSensitivity = FALSE; /* don't assert DSR */
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state.fAbortOnError = TRUE;
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if (!SetCommState (get_handle (), &state))
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system_printf ("couldn't set initial state for %s, %E", get_name ());
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}
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SetCommMask (get_handle (), EV_RXCHAR);
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set_open_status ();
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syscall_printf ("%p = fhandler_serial::open (%s, %y, 0%o)",
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res, get_name (), flags, mode);
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return res;
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}
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int
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fhandler_serial::close ()
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{
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ForceCloseHandle (io_status.hEvent);
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return fhandler_base::close ();
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}
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/* tcsendbreak: POSIX 7.2.2.1 */
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/* Break for 250-500 milliseconds if duration == 0 */
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/* Otherwise, units for duration are undefined */
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int
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fhandler_serial::tcsendbreak (int duration)
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{
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unsigned int sleeptime = 300000;
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if (duration > 0)
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sleeptime *= duration;
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if (SetCommBreak (get_handle ()) == 0)
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return -1;
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/* FIXME: need to send zero bits during duration */
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usleep (sleeptime);
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if (ClearCommBreak (get_handle ()) == 0)
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return -1;
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syscall_printf ("0 = fhandler_serial:tcsendbreak (%d)", duration);
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return 0;
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}
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/* tcdrain: POSIX 7.2.2.1 */
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int
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fhandler_serial::tcdrain ()
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{
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if (FlushFileBuffers (get_handle ()) == 0)
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return -1;
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return 0;
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}
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/* tcflow: POSIX 7.2.2.1 */
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int
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fhandler_serial::tcflow (int action)
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{
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DWORD win32action = 0;
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DCB dcb;
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char xchar;
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termios_printf ("action %d", action);
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switch (action)
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{
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case TCOOFF:
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win32action = SETXOFF;
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break;
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case TCOON:
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win32action = SETXON;
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break;
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case TCION:
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case TCIOFF:
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if (GetCommState (get_handle (), &dcb) == 0)
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return -1;
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if (action == TCION)
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xchar = (dcb.XonChar ? dcb.XonChar : 0x11);
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else
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xchar = (dcb.XoffChar ? dcb.XoffChar : 0x13);
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if (TransmitCommChar (get_handle (), xchar) == 0)
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return -1;
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return 0;
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break;
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default:
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return -1;
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break;
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}
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if (EscapeCommFunction (get_handle (), win32action) == 0)
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return -1;
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return 0;
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}
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/* switch_modem_lines: set or clear RTS and/or DTR */
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int
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fhandler_serial::switch_modem_lines (int set, int clr)
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{
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int res = 0;
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if (set & TIOCM_RTS)
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{
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if (EscapeCommFunction (get_handle (), SETRTS))
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rts = TIOCM_RTS;
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else
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{
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__seterrno ();
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res = -1;
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}
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}
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else if (clr & TIOCM_RTS)
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{
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if (EscapeCommFunction (get_handle (), CLRRTS))
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rts = 0;
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else
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{
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__seterrno ();
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res = -1;
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}
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}
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if (set & TIOCM_DTR)
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{
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if (EscapeCommFunction (get_handle (), SETDTR))
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rts = TIOCM_DTR;
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else
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{
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__seterrno ();
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res = -1;
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}
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}
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else if (clr & TIOCM_DTR)
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{
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if (EscapeCommFunction (get_handle (), CLRDTR))
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rts = 0;
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else
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{
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__seterrno ();
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res = -1;
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}
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}
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return res;
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}
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/* ioctl: */
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int
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fhandler_serial::ioctl (unsigned int cmd, void *buf)
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{
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int res = 0;
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# define ibuf ((int) (intptr_t) buf)
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# define ipbuf (*(int *) buf)
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DWORD ev;
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COMSTAT st;
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if (!ClearCommError (get_handle (), &ev, &st))
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{
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__seterrno ();
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res = -1;
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}
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else
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switch (cmd)
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{
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case TCFLSH:
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res = tcflush (ibuf);
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break;
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case TIOCMGET:
|
|
DWORD modem_lines;
|
|
if (!GetCommModemStatus (get_handle (), &modem_lines))
|
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{
|
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__seterrno ();
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res = -1;
|
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}
|
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else
|
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{
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ipbuf = 0;
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if (modem_lines & MS_CTS_ON)
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ipbuf |= TIOCM_CTS;
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if (modem_lines & MS_DSR_ON)
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ipbuf |= TIOCM_DSR;
|
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if (modem_lines & MS_RING_ON)
|
|
ipbuf |= TIOCM_RI;
|
|
if (modem_lines & MS_RLSD_ON)
|
|
ipbuf |= TIOCM_CD;
|
|
|
|
DWORD cb;
|
|
DWORD mcr;
|
|
if (!DeviceIoControl (get_handle (), IOCTL_SERIAL_GET_DTRRTS,
|
|
NULL, 0, &mcr, 4, &cb, 0) || cb != 4)
|
|
ipbuf |= rts | dtr;
|
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else
|
|
{
|
|
if (mcr & 2)
|
|
ipbuf |= TIOCM_RTS;
|
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if (mcr & 1)
|
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ipbuf |= TIOCM_DTR;
|
|
}
|
|
}
|
|
break;
|
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case TIOCMSET:
|
|
if (switch_modem_lines (ipbuf, ~ipbuf))
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res = -1;
|
|
break;
|
|
case TIOCMBIS:
|
|
if (switch_modem_lines (ipbuf, 0))
|
|
res = -1;
|
|
break;
|
|
case TIOCMBIC:
|
|
if (switch_modem_lines (0, ipbuf))
|
|
res = -1;
|
|
break;
|
|
case TIOCCBRK:
|
|
if (ClearCommBreak (get_handle ()) == 0)
|
|
{
|
|
__seterrno ();
|
|
res = -1;
|
|
}
|
|
break;
|
|
case TIOCSBRK:
|
|
if (SetCommBreak (get_handle ()) == 0)
|
|
{
|
|
__seterrno ();
|
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res = -1;
|
|
}
|
|
break;
|
|
case TIOCINQ:
|
|
if (ev & CE_FRAME || ev & CE_IOE || ev & CE_OVERRUN || ev & CE_RXOVER
|
|
|| ev & CE_RXPARITY)
|
|
{
|
|
set_errno (EINVAL); /* FIXME: Use correct errno */
|
|
res = -1;
|
|
}
|
|
else
|
|
ipbuf = st.cbInQue;
|
|
break;
|
|
case TIOCGWINSZ:
|
|
((struct winsize *) buf)->ws_row = 0;
|
|
((struct winsize *) buf)->ws_col = 0;
|
|
break;
|
|
case FIONREAD:
|
|
set_errno (ENOTSUP);
|
|
res = -1;
|
|
break;
|
|
default:
|
|
res = fhandler_base::ioctl (cmd, buf);
|
|
break;
|
|
}
|
|
|
|
termios_printf ("%d = ioctl(%x, %p)", res, cmd, buf);
|
|
# undef ibuf
|
|
# undef ipbuf
|
|
return res;
|
|
}
|
|
|
|
/* tcflush: POSIX 7.2.2.1 */
|
|
int
|
|
fhandler_serial::tcflush (int queue)
|
|
{
|
|
DWORD flags;
|
|
|
|
switch (queue)
|
|
{
|
|
case TCOFLUSH:
|
|
flags = PURGE_TXABORT | PURGE_TXCLEAR;
|
|
break;
|
|
case TCIFLUSH:
|
|
flags = PURGE_RXABORT | PURGE_RXCLEAR;
|
|
break;
|
|
case TCIOFLUSH:
|
|
flags = PURGE_TXABORT | PURGE_TXCLEAR | PURGE_RXABORT | PURGE_RXCLEAR;
|
|
break;
|
|
default:
|
|
termios_printf ("Invalid tcflush queue %d", queue);
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
if (!PurgeComm (get_handle (), flags))
|
|
{
|
|
__seterrno ();
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* tcsetattr: POSIX 7.2.1.1 */
|
|
int
|
|
fhandler_serial::tcsetattr (int action, const struct termios *t)
|
|
{
|
|
/* Possible actions:
|
|
TCSANOW: immediately change attributes.
|
|
TCSADRAIN: flush output, then change attributes.
|
|
TCSAFLUSH: flush output and discard input, then change attributes.
|
|
*/
|
|
|
|
bool dropDTR = false;
|
|
COMMTIMEOUTS to;
|
|
DCB ostate, state;
|
|
unsigned int ovtime = vtime_, ovmin = vmin_;
|
|
int tmpDtr, tmpRts, res;
|
|
res = tmpDtr = tmpRts = 0;
|
|
|
|
termios_printf ("action %d", action);
|
|
if ((action == TCSADRAIN) || (action == TCSAFLUSH))
|
|
{
|
|
FlushFileBuffers (get_handle ());
|
|
termios_printf ("flushed file buffers");
|
|
}
|
|
if (action == TCSAFLUSH)
|
|
PurgeComm (get_handle (), (PURGE_RXABORT | PURGE_RXCLEAR));
|
|
|
|
/* get default/last comm state */
|
|
if (!GetCommState (get_handle (), &ostate))
|
|
return -1;
|
|
|
|
state = ostate;
|
|
|
|
/* -------------- Set baud rate ------------------ */
|
|
/* FIXME: WIN32 also has 14400, 56000, 128000, and 256000.
|
|
Unix also has 230400. */
|
|
|
|
switch (t->c_ospeed)
|
|
{
|
|
case B0:
|
|
/* Drop DTR - but leave DCB-resident bitrate as-is since
|
|
0 is an invalid bitrate in Win32 */
|
|
dropDTR = true;
|
|
break;
|
|
case B110:
|
|
state.BaudRate = CBR_110;
|
|
break;
|
|
case B300:
|
|
state.BaudRate = CBR_300;
|
|
break;
|
|
case B600:
|
|
state.BaudRate = CBR_600;
|
|
break;
|
|
case B1200:
|
|
state.BaudRate = CBR_1200;
|
|
break;
|
|
case B2400:
|
|
state.BaudRate = CBR_2400;
|
|
break;
|
|
case B4800:
|
|
state.BaudRate = CBR_4800;
|
|
break;
|
|
case B9600:
|
|
state.BaudRate = CBR_9600;
|
|
break;
|
|
case B19200:
|
|
state.BaudRate = CBR_19200;
|
|
break;
|
|
case B38400:
|
|
state.BaudRate = CBR_38400;
|
|
break;
|
|
case B57600:
|
|
state.BaudRate = CBR_57600;
|
|
break;
|
|
case B115200:
|
|
state.BaudRate = CBR_115200;
|
|
break;
|
|
case B128000:
|
|
state.BaudRate = CBR_128000;
|
|
break;
|
|
case B230400:
|
|
state.BaudRate = 230400 /* CBR_230400 - not defined */;
|
|
break;
|
|
case B256000:
|
|
state.BaudRate = CBR_256000;
|
|
break;
|
|
case B460800:
|
|
state.BaudRate = 460800 /* CBR_460800 - not defined */;
|
|
break;
|
|
case B500000:
|
|
state.BaudRate = 500000 /* CBR_500000 - not defined */;
|
|
break;
|
|
case B576000:
|
|
state.BaudRate = 576000 /* CBR_576000 - not defined */;
|
|
break;
|
|
case B921600:
|
|
state.BaudRate = 921600 /* CBR_921600 - not defined */;
|
|
break;
|
|
case B1000000:
|
|
state.BaudRate = 1000000 /* CBR_1000000 - not defined */;
|
|
break;
|
|
case B1152000:
|
|
state.BaudRate = 1152000 /* CBR_1152000 - not defined */;
|
|
break;
|
|
case B1500000:
|
|
state.BaudRate = 1500000 /* CBR_1500000 - not defined */;
|
|
break;
|
|
case B2000000:
|
|
state.BaudRate = 2000000 /* CBR_2000000 - not defined */;
|
|
break;
|
|
case B2500000:
|
|
state.BaudRate = 2500000 /* CBR_2500000 - not defined */;
|
|
break;
|
|
case B3000000:
|
|
state.BaudRate = 3000000 /* CBR_3000000 - not defined */;
|
|
break;
|
|
default:
|
|
/* Unsupported baud rate! */
|
|
termios_printf ("Invalid t->c_ospeed %u", t->c_ospeed);
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
/* -------------- Set byte size ------------------ */
|
|
|
|
switch (t->c_cflag & CSIZE)
|
|
{
|
|
case CS5:
|
|
state.ByteSize = 5;
|
|
break;
|
|
case CS6:
|
|
state.ByteSize = 6;
|
|
break;
|
|
case CS7:
|
|
state.ByteSize = 7;
|
|
break;
|
|
case CS8:
|
|
state.ByteSize = 8;
|
|
break;
|
|
default:
|
|
/* Unsupported byte size! */
|
|
termios_printf ("Invalid t->c_cflag byte size %u",
|
|
t->c_cflag & CSIZE);
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
/* -------------- Set stop bits ------------------ */
|
|
|
|
if (t->c_cflag & CSTOPB)
|
|
state.StopBits = TWOSTOPBITS;
|
|
else
|
|
state.StopBits = ONESTOPBIT;
|
|
|
|
/* -------------- Set parity ------------------ */
|
|
|
|
if (t->c_cflag & PARENB)
|
|
state.Parity = (t->c_cflag & PARODD) ? ODDPARITY : EVENPARITY;
|
|
else
|
|
state.Parity = NOPARITY;
|
|
|
|
state.fBinary = TRUE; /* Binary transfer */
|
|
state.EofChar = 0; /* No end-of-data in binary mode */
|
|
state.fNull = FALSE; /* Don't discard nulls in binary mode */
|
|
|
|
/* -------------- Parity errors ------------------ */
|
|
/* fParity combines the function of INPCK and NOT IGNPAR */
|
|
|
|
if ((t->c_iflag & INPCK) && !(t->c_iflag & IGNPAR))
|
|
state.fParity = TRUE; /* detect parity errors */
|
|
else
|
|
state.fParity = FALSE; /* ignore parity errors */
|
|
|
|
/* Only present in Win32, Unix has no equivalent */
|
|
state.fErrorChar = FALSE;
|
|
state.ErrorChar = 0;
|
|
|
|
/* -------------- Set software flow control ------------------ */
|
|
/* Set fTXContinueOnXoff to FALSE. This prevents the triggering of a
|
|
premature XON when the remote device interprets a received character
|
|
as XON (same as IXANY on the remote side). Otherwise, a TRUE
|
|
value separates the TX and RX functions. */
|
|
|
|
state.fTXContinueOnXoff = TRUE; /* separate TX and RX flow control */
|
|
|
|
/* Transmission flow control */
|
|
if (t->c_iflag & IXON)
|
|
state.fOutX = TRUE; /* enable */
|
|
else
|
|
state.fOutX = FALSE; /* disable */
|
|
|
|
/* Reception flow control */
|
|
if (t->c_iflag & IXOFF)
|
|
state.fInX = TRUE; /* enable */
|
|
else
|
|
state.fInX = FALSE; /* disable */
|
|
|
|
/* XoffLim and XonLim are left at default values */
|
|
|
|
state.XonChar = (t->c_cc[VSTART] ? t->c_cc[VSTART] : 0x11);
|
|
state.XoffChar = (t->c_cc[VSTOP] ? t->c_cc[VSTOP] : 0x13);
|
|
|
|
/* -------------- Set hardware flow control ------------------ */
|
|
|
|
/* Disable DSR flow control */
|
|
state.fOutxDsrFlow = FALSE;
|
|
|
|
/* Some old flavors of Unix automatically enabled hardware flow
|
|
control when software flow control was not enabled. Since newer
|
|
Unices tend to require explicit setting of hardware flow-control,
|
|
this is what we do. */
|
|
|
|
/* RTS/CTS flow control */
|
|
if (t->c_cflag & CRTSCTS)
|
|
{ /* enable */
|
|
state.fOutxCtsFlow = TRUE;
|
|
state.fRtsControl = RTS_CONTROL_HANDSHAKE;
|
|
}
|
|
else
|
|
{ /* disable */
|
|
state.fRtsControl = RTS_CONTROL_ENABLE;
|
|
state.fOutxCtsFlow = FALSE;
|
|
tmpRts = TIOCM_RTS;
|
|
}
|
|
|
|
if (t->c_cflag & CRTSXOFF)
|
|
state.fRtsControl = RTS_CONTROL_HANDSHAKE;
|
|
|
|
/* -------------- DTR ------------------ */
|
|
/* Assert DTR on device open */
|
|
|
|
state.fDtrControl = DTR_CONTROL_ENABLE;
|
|
|
|
/* -------------- DSR ------------------ */
|
|
/* Assert DSR at the device? */
|
|
|
|
if (t->c_cflag & CLOCAL)
|
|
state.fDsrSensitivity = FALSE; /* no */
|
|
else
|
|
state.fDsrSensitivity = TRUE; /* yes */
|
|
|
|
/* -------------- Error handling ------------------ */
|
|
/* Since read/write operations terminate upon error, we
|
|
will use ClearCommError() to resume. */
|
|
|
|
state.fAbortOnError = TRUE;
|
|
|
|
if ((memcmp (&ostate, &state, sizeof (state)) != 0)
|
|
&& !SetCommState (get_handle (), &state))
|
|
{
|
|
/* SetCommState() failed, usually due to invalid DCB param.
|
|
Keep track of this so we can set errno to EINVAL later
|
|
and return failure */
|
|
termios_printf ("SetCommState() failed, %E");
|
|
__seterrno ();
|
|
res = -1;
|
|
}
|
|
|
|
rbinary ((t->c_iflag & IGNCR) ? false : true);
|
|
wbinary ((t->c_oflag & ONLCR) ? false : true);
|
|
|
|
if (dropDTR)
|
|
{
|
|
EscapeCommFunction (get_handle (), CLRDTR);
|
|
tmpDtr = 0;
|
|
}
|
|
else
|
|
{
|
|
/* FIXME: Sometimes when CLRDTR is set, setting
|
|
state.fDtrControl = DTR_CONTROL_ENABLE will fail. This
|
|
is a problem since a program might want to change some
|
|
parameters while DTR is still down. */
|
|
|
|
EscapeCommFunction (get_handle (), SETDTR);
|
|
tmpDtr = TIOCM_DTR;
|
|
}
|
|
|
|
rts = tmpRts;
|
|
dtr = tmpDtr;
|
|
|
|
/* The following documentation on was taken from "Linux Serial Programming
|
|
HOWTO". It explains how MIN (t->c_cc[VMIN] || vmin_) and TIME
|
|
(t->c_cc[VTIME] || vtime_) is to be used.
|
|
|
|
In non-canonical input processing mode, input is not assembled into
|
|
lines and input processing (erase, kill, delete, etc.) does not
|
|
occur. Two parameters control the behavior of this mode: c_cc[VTIME]
|
|
sets the character timer, and c_cc[VMIN] sets the minimum number of
|
|
characters to receive before satisfying the read.
|
|
|
|
If MIN > 0 and TIME = 0, MIN sets the number of characters to receive
|
|
before the read is satisfied. As TIME is zero, the timer is not used.
|
|
|
|
If MIN = 0 and TIME > 0, TIME serves as a timeout value. The read will
|
|
be satisfied if a single character is read, or TIME is exceeded (t =
|
|
TIME *0.1 s). If TIME is exceeded, no character will be returned.
|
|
|
|
If MIN > 0 and TIME > 0, TIME serves as an inter-character timer. The
|
|
read will be satisfied if MIN characters are received, or the time
|
|
between two characters exceeds TIME. The timer is restarted every time
|
|
a character is received and only becomes active after the first
|
|
character has been received.
|
|
|
|
If MIN = 0 and TIME = 0, read will be satisfied immediately. The
|
|
number of characters currently available, or the number of characters
|
|
requested will be returned. According to Antonino (see contributions),
|
|
you could issue a fcntl(fd, F_SETFL, FNDELAY); before reading to get
|
|
the same result.
|
|
*/
|
|
|
|
if (t->c_lflag & ICANON)
|
|
{
|
|
vmin_ = 0;
|
|
vtime_ = 0;
|
|
}
|
|
else
|
|
{
|
|
vtime_ = t->c_cc[VTIME] * 100;
|
|
vmin_ = t->c_cc[VMIN];
|
|
}
|
|
|
|
debug_printf ("vtime %d, vmin %ld", vtime_, vmin_);
|
|
|
|
if (ovmin != vmin_ || ovtime != vtime_)
|
|
{
|
|
memset (&to, 0, sizeof (to));
|
|
|
|
if ((vmin_ > 0) && (vtime_ == 0))
|
|
{
|
|
/* Returns immediately with whatever is in buffer on a ReadFile();
|
|
or blocks if nothing found. We will keep calling ReadFile(); until
|
|
vmin_ characters are read */
|
|
to.ReadIntervalTimeout = to.ReadTotalTimeoutMultiplier = MAXDWORD;
|
|
to.ReadTotalTimeoutConstant = MAXDWORD - 1;
|
|
}
|
|
else if ((vmin_ == 0) && (vtime_ > 0))
|
|
{
|
|
/* set timeoout constant appropriately and we will only try to
|
|
read one character in ReadFile() */
|
|
to.ReadTotalTimeoutConstant = vtime_;
|
|
to.ReadIntervalTimeout = to.ReadTotalTimeoutMultiplier = MAXDWORD;
|
|
}
|
|
else if ((vmin_ > 0) && (vtime_ > 0))
|
|
{
|
|
/* time applies to the interval time for this case */
|
|
to.ReadIntervalTimeout = vtime_;
|
|
}
|
|
else if ((vmin_ == 0) && (vtime_ == 0))
|
|
{
|
|
/* returns immediately with whatever is in buffer as per
|
|
Time-Outs docs in Win32 SDK API docs */
|
|
to.ReadIntervalTimeout = MAXDWORD;
|
|
}
|
|
|
|
debug_printf ("ReadTotalTimeoutConstant %u, ReadIntervalTimeout %u, ReadTotalTimeoutMultiplier %u",
|
|
to.ReadTotalTimeoutConstant, to.ReadIntervalTimeout, to.ReadTotalTimeoutMultiplier);
|
|
|
|
if (!SetCommTimeouts(get_handle (), &to))
|
|
{
|
|
/* SetCommTimeouts() failed. Keep track of this so we
|
|
can set errno to EINVAL later and return failure */
|
|
termios_printf ("SetCommTimeouts() failed, %E");
|
|
__seterrno ();
|
|
res = -1;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/* tcgetattr: POSIX 7.2.1.1 */
|
|
int
|
|
fhandler_serial::tcgetattr (struct termios *t)
|
|
{
|
|
DCB state;
|
|
|
|
/* Get current Win32 comm state */
|
|
if (GetCommState (get_handle (), &state) == 0)
|
|
return -1;
|
|
|
|
/* for safety */
|
|
memset (t, 0, sizeof (*t));
|
|
|
|
t->c_cflag = 0;
|
|
/* -------------- Baud rate ------------------ */
|
|
switch (state.BaudRate)
|
|
{
|
|
case CBR_110:
|
|
t->c_ospeed = t->c_ispeed = B110;
|
|
break;
|
|
case CBR_300:
|
|
t->c_ospeed = t->c_ispeed = B300;
|
|
break;
|
|
case CBR_600:
|
|
t->c_ospeed = t->c_ispeed = B600;
|
|
break;
|
|
case CBR_1200:
|
|
t->c_ospeed = t->c_ispeed = B1200;
|
|
break;
|
|
case CBR_2400:
|
|
t->c_ospeed = t->c_ispeed = B2400;
|
|
break;
|
|
case CBR_4800:
|
|
t->c_ospeed = t->c_ispeed = B4800;
|
|
break;
|
|
case CBR_9600:
|
|
t->c_ospeed = t->c_ispeed = B9600;
|
|
break;
|
|
case CBR_19200:
|
|
t->c_ospeed = t->c_ispeed = B19200;
|
|
break;
|
|
case CBR_38400:
|
|
t->c_ospeed = t->c_ispeed = B38400;
|
|
break;
|
|
case CBR_57600:
|
|
t->c_ospeed = t->c_ispeed = B57600;
|
|
break;
|
|
case CBR_115200:
|
|
t->c_ospeed = t->c_ispeed = B115200;
|
|
break;
|
|
case CBR_128000:
|
|
t->c_ospeed = t->c_ispeed = B128000;
|
|
break;
|
|
case 230400: /* CBR_230400 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B230400;
|
|
break;
|
|
case CBR_256000:
|
|
t->c_ospeed = t->c_ispeed = B256000;
|
|
break;
|
|
case 460800: /* CBR_460000 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B460800;
|
|
break;
|
|
case 500000: /* CBR_500000 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B500000;
|
|
break;
|
|
case 576000: /* CBR_576000 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B576000;
|
|
break;
|
|
case 921600: /* CBR_921600 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B921600;
|
|
break;
|
|
case 1000000: /* CBR_1000000 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B1000000;
|
|
break;
|
|
case 1152000: /* CBR_1152000 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B1152000;
|
|
break;
|
|
case 1500000: /* CBR_1500000 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B1500000;
|
|
break;
|
|
case 2000000: /* CBR_2000000 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B2000000;
|
|
break;
|
|
case 2500000: /* CBR_2500000 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B2500000;
|
|
break;
|
|
case 3000000: /* CBR_3000000 - not defined */
|
|
t->c_ospeed = t->c_ispeed = B3000000;
|
|
break;
|
|
default:
|
|
/* Unsupported baud rate! */
|
|
termios_printf ("Invalid baud rate %u", state.BaudRate);
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
/* -------------- Byte size ------------------ */
|
|
|
|
switch (state.ByteSize)
|
|
{
|
|
case 5:
|
|
t->c_cflag |= CS5;
|
|
break;
|
|
case 6:
|
|
t->c_cflag |= CS6;
|
|
break;
|
|
case 7:
|
|
t->c_cflag |= CS7;
|
|
break;
|
|
case 8:
|
|
t->c_cflag |= CS8;
|
|
break;
|
|
default:
|
|
/* Unsupported byte size! */
|
|
termios_printf ("Invalid byte size %u", state.ByteSize);
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
/* -------------- Stop bits ------------------ */
|
|
|
|
if (state.StopBits == TWOSTOPBITS)
|
|
t->c_cflag |= CSTOPB;
|
|
|
|
/* -------------- Parity ------------------ */
|
|
|
|
if (state.Parity == ODDPARITY)
|
|
t->c_cflag |= (PARENB | PARODD);
|
|
if (state.Parity == EVENPARITY)
|
|
t->c_cflag |= PARENB;
|
|
|
|
/* -------------- Parity errors ------------------ */
|
|
|
|
/* fParity combines the function of INPCK and NOT IGNPAR */
|
|
if (state.fParity)
|
|
t->c_iflag |= INPCK;
|
|
else
|
|
t->c_iflag |= IGNPAR; /* not necessarily! */
|
|
|
|
/* -------------- Software flow control ------------------ */
|
|
|
|
/* transmission flow control */
|
|
if (state.fOutX)
|
|
t->c_iflag |= IXON;
|
|
|
|
/* reception flow control */
|
|
if (state.fInX)
|
|
t->c_iflag |= IXOFF;
|
|
|
|
t->c_cc[VSTART] = (state.XonChar ? state.XonChar : 0x11);
|
|
t->c_cc[VSTOP] = (state.XoffChar ? state.XoffChar : 0x13);
|
|
|
|
/* -------------- Hardware flow control ------------------ */
|
|
/* Some old flavors of Unix automatically enabled hardware flow
|
|
control when software flow control was not enabled. Since newer
|
|
Unices tend to require explicit setting of hardware flow-control,
|
|
this is what we do. */
|
|
|
|
/* Input flow-control */
|
|
if ((state.fRtsControl == RTS_CONTROL_HANDSHAKE) && state.fOutxCtsFlow)
|
|
t->c_cflag |= CRTSCTS;
|
|
if (state.fRtsControl == RTS_CONTROL_HANDSHAKE)
|
|
t->c_cflag |= CRTSXOFF;
|
|
|
|
/* -------------- CLOCAL --------------- */
|
|
/* DSR is only lead toggled only by CLOCAL. Check it to see if
|
|
CLOCAL was called. */
|
|
/* FIXME: If tcsetattr() hasn't been called previously, this may
|
|
give a false CLOCAL. */
|
|
|
|
if (!state.fDsrSensitivity)
|
|
t->c_cflag |= CLOCAL;
|
|
|
|
/* FIXME: need to handle IGNCR */
|
|
#if 0
|
|
if (!rbinary ())
|
|
t->c_iflag |= IGNCR;
|
|
#endif
|
|
|
|
if (!wbinary ())
|
|
t->c_oflag |= ONLCR;
|
|
|
|
t->c_cc[VTIME] = vtime_ / 100;
|
|
t->c_cc[VMIN] = vmin_;
|
|
|
|
debug_printf ("vmin_ %lu, vtime_ %u", vmin_, vtime_);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
fhandler_serial::fixup_after_fork (HANDLE parent)
|
|
{
|
|
if (close_on_exec ())
|
|
fhandler_base::fixup_after_fork (parent);
|
|
overlapped_setup ();
|
|
debug_printf ("io_status.hEvent %p", io_status.hEvent);
|
|
}
|
|
|
|
void
|
|
fhandler_serial::fixup_after_exec ()
|
|
{
|
|
if (!close_on_exec ())
|
|
overlapped_setup ();
|
|
debug_printf ("io_status.hEvent %p, close_on_exec %d", io_status.hEvent, close_on_exec ());
|
|
}
|
|
|
|
int
|
|
fhandler_serial::dup (fhandler_base *child, int flags)
|
|
{
|
|
fhandler_serial *fhc = (fhandler_serial *) child;
|
|
fhc->overlapped_setup ();
|
|
return fhandler_base::dup (child, flags);
|
|
}
|