Welcome to mirror list, hosted at ThFree Co, Russian Federation.

cygwin.com/git/newlib-cygwin.git - Unnamed repository; edit this file 'description' to name the repository.
summaryrefslogtreecommitdiff
path: root/winsup/cygwin/fhandler_serial.cc
diff options
context:
space:
mode:
Diffstat (limited to 'winsup/cygwin/fhandler_serial.cc')
-rw-r--r--winsup/cygwin/fhandler_serial.cc157
1 files changed, 134 insertions, 23 deletions
diff --git a/winsup/cygwin/fhandler_serial.cc b/winsup/cygwin/fhandler_serial.cc
index 20ad4d8e1..748eb4b28 100644
--- a/winsup/cygwin/fhandler_serial.cc
+++ b/winsup/cygwin/fhandler_serial.cc
@@ -1,6 +1,6 @@
/* fhandler_serial.cc
- Copyright 1996, 1997, 1998, 1999, 2000, 2001 Red Hat, Inc.
+ Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
This file is part of Cygwin.
@@ -9,14 +9,12 @@ Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
-#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include "cygerrno.h"
#include "security.h"
#include "fhandler.h"
-#include "sync.h"
#include "sigproc.h"
#include "pinfo.h"
#include <sys/termios.h>
@@ -24,13 +22,9 @@ details. */
/**********************************************************************/
/* fhandler_serial */
-fhandler_serial::fhandler_serial (const char *name, DWORD devtype, int unit) :
- fhandler_base (devtype, name, unit)
+fhandler_serial::fhandler_serial (int unit)
+ : fhandler_base (FH_SERIAL, unit), vmin_ (0), vtime_ (0), pgrp_ (myself->pgid)
{
- set_cb (sizeof *this);
- vmin_ = 0;
- vtime_ = 0;
- pgrp_ = myself->pgid;
set_need_fork_fixup ();
}
@@ -64,7 +58,6 @@ fhandler_serial::raw_read (void *ptr, size_t ulen)
for (n = 0, tot = 0; ulen; ulen -= n, ptr = (char *)ptr + n)
{
- DWORD ev;
COMSTAT st;
DWORD inq = 1;
@@ -125,7 +118,7 @@ fhandler_serial::raw_read (void *ptr, size_t ulen)
if (inq > ulen)
inq = ulen;
debug_printf ("inq %d", inq);
- if (ReadFile (get_handle(), ptr, min (inq, ulen), &n, &io_status))
+ if (ReadFile (get_handle (), ptr, min (inq, ulen), &n, &io_status))
/* Got something */;
else if (GetLastError () != ERROR_IO_PENDING)
goto err;
@@ -169,7 +162,7 @@ fhandler_serial::raw_write (const void *ptr, size_t len)
for (;;)
{
- if (WriteFile (get_handle(), ptr, len, &bytes_written, &write_status))
+ if (WriteFile (get_handle (), ptr, len, &bytes_written, &write_status))
break;
switch (GetLastError ())
@@ -188,13 +181,13 @@ fhandler_serial::raw_write (const void *ptr, size_t len)
break;
}
- ForceCloseHandle(write_status.hEvent);
+ ForceCloseHandle (write_status.hEvent);
return bytes_written;
err:
__seterrno ();
- ForceCloseHandle(write_status.hEvent);
+ ForceCloseHandle (write_status.hEvent);
return -1;
}
@@ -207,12 +200,11 @@ fhandler_serial::dump (void)
void
fhandler_serial::init (HANDLE f, DWORD flags, mode_t bin)
{
- fhandler_base::init (f, flags, bin);
- (void) open (NULL, flags, bin ? O_BINARY : 0);
+ (void) open (NULL, flags, bin & (O_BINARY | O_TEXT));
}
int
-fhandler_serial::open (const char *name, int flags, mode_t mode)
+fhandler_serial::open (path_conv *, int flags, mode_t mode)
{
int res;
COMMTIMEOUTS to;
@@ -221,10 +213,10 @@ fhandler_serial::open (const char *name, int flags, mode_t mode)
syscall_printf ("fhandler_serial::open (%s, %p, %p)",
get_name (), flags, mode);
- if (name && !(res = this->fhandler_base::open (flags, mode)))
+ if (!(res = this->fhandler_base::open (NULL, flags, mode)))
return 0;
- else
- res = 1;
+
+ res = 1;
(void) SetCommMask (get_handle (), EV_RXCHAR);
@@ -276,6 +268,23 @@ fhandler_serial::open (const char *name, int flags, mode_t mode)
system_printf ("couldn't set initial state for %s, %E", get_name ());
}
+ /* setting rts and dtr to known state so that ioctl() function with
+ request TIOCMGET could return correct value of RTS and DTR lines.
+ Important only for Win 9x systems */
+
+ if (!wincap.supports_reading_modem_output_lines ())
+ {
+ if (EscapeCommFunction (get_handle (), SETDTR) == 0)
+ system_printf ("couldn't set initial state of DTR for %s, %E", get_name ());
+ if (EscapeCommFunction (get_handle (), SETRTS) == 0)
+ system_printf ("couldn't set initial state of RTS for %s, %E", get_name ());
+
+ /* even though one of above functions fail I have to set rts and dtr
+ variables to initial value. */
+ rts = TIOCM_RTS;
+ dtr = TIOCM_DTR;
+ }
+
SetCommMask (get_handle (), EV_RXCHAR);
set_open_status ();
syscall_printf ("%p = fhandler_serial::open (%s, %p, %p)",
@@ -366,6 +375,99 @@ fhandler_serial::tcflow (int action)
return 0;
}
+
+/* ioctl: */
+int
+fhandler_serial::ioctl (unsigned int cmd, void *buffer)
+{
+
+ DWORD ev;
+ COMSTAT st;
+ DWORD action;
+ DWORD modemLines;
+ DWORD mcr;
+ DWORD cbReturned;
+ bool result;
+ int modemStatus;
+ int request;
+
+ request = *(int *) buffer;
+ action = 0;
+ modemStatus = 0;
+ if (!ClearCommError (get_handle (), &ev, &st))
+ return -1;
+ switch (cmd)
+ {
+ case TIOCMGET:
+ if (GetCommModemStatus (get_handle (), &modemLines) == 0)
+ return -1;
+ if (modemLines & MS_CTS_ON)
+ modemStatus |= TIOCM_CTS;
+ if (modemLines & MS_DSR_ON)
+ modemStatus |= TIOCM_DSR;
+ if (modemLines & MS_RING_ON)
+ modemStatus |= TIOCM_RI;
+ if (modemLines & MS_RLSD_ON)
+ modemStatus |= TIOCM_CD;
+ if (!wincap.supports_reading_modem_output_lines ())
+ modemStatus |= rts | dtr;
+ else
+ {
+ result = DeviceIoControl (get_handle (),
+ 0x001B0078,
+ NULL, 0, &mcr, 4, &cbReturned, 0);
+ if (!result)
+ return -1;
+ if (cbReturned != 4)
+ return -1;
+ if (mcr & 2)
+ modemStatus |= TIOCM_RTS;
+ if (mcr & 1)
+ modemStatus |= TIOCM_DTR;
+ }
+ *(int *) buffer = modemStatus;
+ return 0;
+ case TIOCMSET:
+ if (request & TIOCM_RTS)
+ {
+ if (EscapeCommFunction (get_handle (), SETRTS) == 0)
+ return -1;
+ else
+ rts = TIOCM_RTS;
+ }
+ else
+ {
+ if (EscapeCommFunction (get_handle (), CLRRTS) == 0)
+ return -1;
+ else
+ rts = 0;
+ }
+ if (request & TIOCM_DTR)
+ {
+ if (EscapeCommFunction (get_handle (), SETDTR) == 0)
+ return -1;
+ else
+ dtr = TIOCM_DTR;
+ }
+ else
+ {
+ if (EscapeCommFunction (get_handle (), CLRDTR) == 0)
+ return -1;
+ else
+ dtr = 0;
+ }
+ return 0;
+ case TIOCINQ:
+ if (ev & CE_FRAME | ev & CE_IOE | ev & CE_OVERRUN |
+ ev & CE_RXOVER | ev & CE_RXPARITY)
+ return -1;
+ *(int *) buffer = st.cbInQue;
+ return 0;
+ default:
+ return -1;
+ }
+}
+
/* tcflush: POSIX 7.2.2.1 */
int
fhandler_serial::tcflush (int queue)
@@ -373,12 +475,11 @@ fhandler_serial::tcflush (int queue)
if (queue == TCOFLUSH || queue == TCIOFLUSH)
PurgeComm (get_handle (), PURGE_TXABORT | PURGE_TXCLEAR);
- if (queue == TCIFLUSH | queue == TCIOFLUSH)
+ if (queue == TCIFLUSH || queue == TCIOFLUSH)
/* Input flushing by polling until nothing turns up
(we stop after 1000 chars anyway) */
for (int max = 1000; max > 0; max--)
{
- DWORD ev;
COMSTAT st;
if (!PurgeComm (get_handle (), PURGE_RXABORT | PURGE_RXCLEAR))
break;
@@ -404,6 +505,8 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
COMMTIMEOUTS to;
DCB ostate, state;
unsigned int ovtime = vtime_, ovmin = vmin_;
+ int tmpDtr, tmpRts;
+ tmpDtr = tmpRts = 0;
termios_printf ("action %d", action);
if ((action == TCSADRAIN) || (action == TCSAFLUSH))
@@ -569,6 +672,7 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
{ /* disable */
state.fRtsControl = RTS_CONTROL_ENABLE;
state.fOutxCtsFlow = FALSE;
+ tmpRts = TIOCM_RTS;
}
if (t->c_cflag & CRTSXOFF)
@@ -601,7 +705,10 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
set_w_binary ((t->c_oflag & ONLCR) ? 0 : 1);
if (dropDTR == TRUE)
- EscapeCommFunction (get_handle (), CLRDTR);
+ {
+ EscapeCommFunction (get_handle (), CLRDTR);
+ tmpDtr = 0;
+ }
else
{
/* FIXME: Sometimes when CLRDTR is set, setting
@@ -610,8 +717,12 @@ fhandler_serial::tcsetattr (int action, const struct termios *t)
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
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-16 15:28:41 +0300