newlib/winsup/cygwin/fhandler_tty.cc
Christopher Faylor b0e82b74fb * Makefile.in: Add cygheap.o.
* child_info.h: Add specific exec class.
* cygheap.h: New file.  Contains declarations for cygwin heap.
* cygheap.cc: New file.  Implements cygwin heap functions.
* dcrt0.cc (quoted): Simplify due to new method for passing arguments between
cygwin programs.
(alloc_stack_hard_way): Attempt to handle overlapped stack.
(dll_crt0_1): Move child_info processing here.  Accomodate new method for
passing arguments between cygwin programs.  Initialize cygwin heap.  Establish
__argc and __argv variables.
(_dll_crt0): Move most of child_info processing to dll_crt0_1.
(cygwin_dll_init): Remove duplication.
* dtable.cc (dtable::extend): Allocate dtable using cygwin heap.
(dtable::build_fhandler): Ditto for fhandler type being constructed.
(dtable::dup_worker): Free new fhandler from cygwin heap on error.
(dtable::select_*): Don't assume that this == fdtab.
(dtable::linearize_fd_array): Delete.
(dtable::delinearize_fd_array): Delete.
(dtable::fixup_after_exec): New file.
(dtable::vfork_child_dup): Use cygwin heap.
(dtable::vfork_parent_restore): Ditto.
* dtable.h: Remove obsolete methods.  Add new method.
* environ.cc (posify): Eliminate already_posix parameter and logic.
(envsize): New function.
(_addenv): Use envsize.
(environ_init): Accept an argument pointing to an existing environment list.
If supplied, allocate space for this in the the program's heap.
* fhandler.cc (fhandler_base::operator =): Move here from fhandler.h.  Use
cygwin heap to allocate filenames.
(fhandler_base::set_name): Allocate/free names from cygwin heap.
(fhandler_base::linearize): Delete.
(fhandler_base::de_linearize): Delete.
(fhandler_base::operator delete): Free from cygwin heap.
(fhandler_base::~fhandler_base): Ditto.
* fhandler.h: Accomodate elimination of *linearize and other changes above.
* fhandler_console.cc (fhandler_console::fixup_after_exec): Rename from
de_linearize.
* heap.h: New file.
* fhandler_tty.cc (fhandler_tty_slave::fhandler_tty_slave): Use cygwin heap for
name.  fhandler_tty::fixup_after_exec): Rename from de_linearize.
* fork.cc (fork): Call cygheap_fixup_in_child.
* heap.cc: Use declarations in heap.h.
* malloc.cc: Sprinkle assertions throughout to catch attempts to free/realloc
something from the cygwin heap.
* path.cc: Throughout, eliminate use of per-thread cache for cwd.  Use cwd_*
functions rather than cwd_* variables to access cwd_win32 and cwd_posix.
(cwd_win32): New function.
(cwd_posix): New function.
(cwd_hash): New function.
(cwd_fixup_after_exec): New function.
* path.h: Accomodate path.cc changes.
* pinfo.cc (pinfo_init): Accept a pointer to an environment table.  Pass this
to environ_init.  Eliminate old 'title' tests.
* pinfo.h: Accomodate above change in argument.
* spawn.cc (struct av): New method for building argv list.
(av::unshift): New method.
(spawn_guts): Allocate everything that the child process needs in the cygwin
heap and pass a pointer to this to the child.  Build argv list using new
method.  Eliminate delinearize stuff.
* thread.h: Eliminate _cwd_win32 and _cwd_posix buffers.
* winsup.h: Eliminate obsolete functions.  Add envsize() declaration.
2000-09-03 04:16:35 +00:00

1098 lines
25 KiB
C++

/* fhandler_tty.cc
Copyright 1997, 1998, 2000 Cygnus Solutions.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <ctype.h>
#include <limits.h>
#include "cygerrno.h"
#include "fhandler.h"
#include "dtable.h"
#include "sync.h"
#include "sigproc.h"
#include "pinfo.h"
#include "cygheap.h"
/* Tty master stuff */
fhandler_tty_master NO_COPY *tty_master;
static DWORD WINAPI process_input (void *); // Input queue thread
static DWORD WINAPI process_output (void *); // Output queue thread
static DWORD WINAPI process_ioctl (void *); // Ioctl requests thread
fhandler_tty_master::fhandler_tty_master (const char *name, int unit) :
fhandler_pty_master (name, FH_TTYM, unit)
{
set_cb (sizeof *this);
console = NULL;
hThread = NULL;
}
int
fhandler_tty_master::init (int ntty)
{
HANDLE h;
termios_printf ("Creating master for tty%d", ntty);
if (init_console ())
{
termios_printf ("can't create fhandler");
return -1;
}
termios ti;
memset (&ti, 0, sizeof (ti));
console->tcsetattr (0, &ti);
ttynum = ntty;
cygwin_shared->tty[ttynum]->common_init (this);
h = makethread (process_input, NULL, 0, "ttyin");
if (h == NULL)
{
termios_printf ("can't create input thread");
return -1;
}
else
{
SetThreadPriority (h, THREAD_PRIORITY_HIGHEST);
CloseHandle (h);
}
h = makethread (process_ioctl, NULL, 0, "ttyioctl");
if (h == NULL)
{
termios_printf ("can't create ioctl thread");
return -1;
}
else
{
SetThreadPriority (h, THREAD_PRIORITY_HIGHEST);
CloseHandle (h);
}
hThread = makethread (process_output, NULL, 0, "ttyout");
if (hThread != NULL)
SetThreadPriority (hThread, THREAD_PRIORITY_HIGHEST);
else
{
termios_printf ("can't create output thread");
return -1;
}
return 0;
}
#ifdef DEBUGGING
static class mutex_stack
{
public:
const char *fn;
int ln;
const char *tname;
} ostack[100];
static int osi = 0;
#endif /*DEBUGGING*/
DWORD
fhandler_tty_common::__acquire_output_mutex (const char *fn, int ln,
DWORD ms)
{
if (strace.active)
strace.prntf (_STRACE_TERMIOS, fn, "(%d): tty output_mutex: waiting %d ms", ln, ms);
DWORD res = WaitForSingleObject (output_mutex, ms);
if (res == WAIT_OBJECT_0)
{
#ifndef DEBUGGING
if (strace.active)
strace.prntf (_STRACE_TERMIOS, fn, "(%d): tty output_mutex: acquired", ln, res);
#else
ostack[osi].fn = fn;
ostack[osi].ln = ln;
ostack[osi].tname = threadname (0, 0);
termios_printf ("acquired for %s:%d, osi %d", fn, ln, osi);
osi++;
#endif
}
return res;
}
void
fhandler_tty_common::__release_output_mutex (const char *fn, int ln)
{
if (ReleaseMutex (output_mutex))
{
#ifndef DEBUGGING
if (strace.active)
strace.prntf (_STRACE_TERMIOS, fn, "(%d): tty output_mutex released", ln);
#else
if (osi > 0)
osi--;
termios_printf ("released at %s:%d, osi %d", fn, ln, osi);
termios_printf(" for %s:%d (%s)", ostack[osi].fn, ostack[osi].ln, ostack[osi].tname);
ostack[osi].ln = -ln;
#endif
}
}
#define acquire_output_mutex(ms) \
__acquire_output_mutex (__PRETTY_FUNCTION__, __LINE__, ms);
#define release_output_mutex() \
__release_output_mutex (__PRETTY_FUNCTION__, __LINE__);
/* Process tty input. */
void
fhandler_pty_master::doecho (const void *str, DWORD len)
{
acquire_output_mutex (INFINITE);
if (!WriteFile (get_ttyp ()->to_master, str, len, &len, NULL))
termios_printf ("Write to %p failed, %E", get_ttyp ()->to_master);
// WaitForSingleObject (output_done_event, INFINITE);
release_output_mutex ();
}
int
fhandler_pty_master::accept_input ()
{
DWORD written;
DWORD n;
const char dummy[1] = {'X'};
const char *buf;
n = get_ttyp ()->read_retval = eat_readahead (-1);
if (n != 0)
buf = rabuf;
else
{
n = 1;
buf = dummy;
termios_printf ("sending EOF to slave");
}
termios_printf ("about to write %d chars to slave", n);
if (!WriteFile (get_output_handle (), buf, n, &written, NULL))
return -1;
return get_ttyp ()->read_retval;
}
static DWORD WINAPI
process_input (void *)
{
char rawbuf[INP_BUFFER_SIZE];
while (1)
{
int nraw = tty_master->console->read ((void *) rawbuf,
(size_t) INP_BUFFER_SIZE);
tty_master->line_edit (rawbuf, nraw);
}
}
BOOL
fhandler_pty_master::hit_eof ()
{
if (get_ttyp ()->was_opened && !get_ttyp ()->slave_alive ())
{
/* We have the only remaining open handle to this pty, and
the slave pty has been opened at least once. We treat
this as EOF. */
termios_printf ("all other handles closed");
return 1;
}
return 0;
}
/* Process tty output requests */
int
fhandler_pty_master::process_slave_output (char *buf, size_t len, int pktmode_on)
{
size_t rlen;
char outbuf[OUT_BUFFER_SIZE + 1];
DWORD n;
int column = 0;
int rc = 0;
if (len == 0)
goto out;
if (need_nl)
{
/* We need to return a left over \n character, resulting from
\r\n conversion. Note that we already checked for FLUSHO and
OutputStopped at the time that we read the character, so we
don't check again here. */
buf[0] = '\n';
need_nl = 0;
rc = 1;
goto out;
}
for (;;)
{
/* Set RLEN to the number of bytes to read from the pipe. */
rlen = len;
if (get_ttyp ()->ti.c_oflag & OPOST && get_ttyp ()->ti.c_oflag & ONLCR)
{
/* We are going to expand \n to \r\n, so don't read more than
half of the number of bytes requested. */
rlen /= 2;
if (rlen == 0)
rlen = 1;
}
if (rlen > sizeof outbuf)
rlen = sizeof outbuf;
HANDLE handle = get_io_handle ();
n = 0; // get_readahead_into_buffer (outbuf, len);
if (!n)
{
/* Doing a busy wait like this is quite inefficient, but nothing
else seems to work completely. Windows should provide some sort
of overlapped I/O for pipes, or something, but it doesn't. */
while (1)
{
if (!PeekNamedPipe (handle, NULL, 0, NULL, &n, NULL))
goto err;
if (n > 0)
break;
if (hit_eof ())
goto out;
if (n == 0 && (get_flags () & (O_NONBLOCK | O_NDELAY)) != 0)
{
set_errno (EAGAIN);
rc = -1;
break;
}
Sleep (10);
}
if (ReadFile (handle, outbuf, rlen, &n, NULL) == FALSE)
goto err;
}
termios_printf ("bytes read %u", n);
if (get_ttyp ()->ti.c_lflag & FLUSHO)
{
get_ttyp ()->write_retval = n;
if (output_done_event != NULL)
SetEvent (output_done_event);
continue;
}
if (get_ttyp ()->OutputStopped)
{
termios_printf ("waiting for restart_output_event");
WaitForSingleObject (restart_output_event, INFINITE);
termios_printf ("done waiting for restart_output_event");
}
char *optr;
optr = buf;
if (pktmode_on)
*optr++ = TIOCPKT_DATA;
if (!(get_ttyp ()->ti.c_oflag & OPOST)) // post-process output
{
memcpy (optr, outbuf, n);
optr += n;
}
else // raw output mode
{
char *iptr = outbuf;
while (n--)
{
switch (*iptr)
{
case '\r':
if ((get_ttyp ()->ti.c_oflag & ONOCR) && column == 0)
{
iptr++;
continue;
}
if (get_ttyp ()->ti.c_oflag & OCRNL)
*iptr = '\n';
else
column = 0;
break;
case '\n':
if (get_ttyp ()->ti.c_oflag & ONLCR)
{
*optr++ = '\r';
column = 0;
}
if (get_ttyp ()->ti.c_oflag & ONLRET)
column = 0;
break;
default:
column++;
break;
}
/* Don't store data past the end of the user's buffer. This
can happen if the user requests a read of 1 byte when
doing \r\n expansion. */
if (optr - buf >= (int) len)
{
if (*iptr != '\n' || n != 0)
system_printf ("internal error: %d unexpected characters", n);
need_nl = 1;
break;
}
*optr++ = *iptr++;
}
}
rc = optr - buf;
break;
err:
if (GetLastError () == ERROR_BROKEN_PIPE)
rc = 0;
else
{
__seterrno ();
rc = -1;
}
break;
}
out:
termios_printf ("returning %d", rc);
return rc;
}
static DWORD WINAPI
process_output (void *)
{
char buf[OUT_BUFFER_SIZE*2];
for (;;)
{
int n = tty_master->process_slave_output (buf, OUT_BUFFER_SIZE, 0);
if (n < 0)
{
termios_printf ("ReadFile %E");
ExitThread (0);
}
if (n == 0)
{
/* End of file. */
ExitThread (0);
}
n = tty_master->console->write ((void *) buf, (size_t) n);
tty_master->get_ttyp ()->write_retval = n == -1 ? -get_errno () : n;
SetEvent (tty_master->output_done_event);
}
}
/* Process tty ioctl requests */
static DWORD WINAPI
process_ioctl (void *)
{
while (1)
{
WaitForSingleObject (tty_master->ioctl_request_event, INFINITE);
termios_printf ("ioctl() request");
tty_master->get_ttyp ()->ioctl_retval =
tty_master->console->ioctl (tty_master->get_ttyp ()->cmd,
(void *) &tty_master->get_ttyp ()->arg);
SetEvent (tty_master->ioctl_done_event);
}
}
/**********************************************************************/
/* Tty slave stuff */
fhandler_tty_slave::fhandler_tty_slave(int num, const char *name) :
fhandler_tty_common (FH_TTYS, name, num)
{
set_cb (sizeof *this);
ttynum = num;
/* FIXME: This is wasteful. We should rewrite the set_name path to eliminate the
need for double allocates. */
unix_path_name_ = (char *) crealloc (unix_path_name_, strlen(win32_path_name_) + 1);
strcpy (unix_path_name_, win32_path_name_);
unix_path_name_[0] = unix_path_name_[4] = '/';
debug_printf ("unix '%s', win32 '%s'", unix_path_name_, win32_path_name_);
inuse = NULL;
}
fhandler_tty_slave::fhandler_tty_slave(const char *name) :
fhandler_tty_common (FH_TTYS, name, 0)
{
set_cb (sizeof *this);
inuse = NULL;
}
int
fhandler_tty_slave::open (const char *, int flags, mode_t)
{
tcinit (cygwin_shared->tty[ttynum]);
attach_tty (ttynum);
set_ctty (ttynum, flags);
set_flags (flags);
/* Create synchronisation events */
char buf[40];
/* output_done_event may or may not exist. It will exist if the tty
was opened by fhandler_tty_master::init, normally called at
startup if use_tty is non-zero. It will not exist if this is a
pty opened by fhandler_pty_master::open. In the former case, tty
output is handled by a separate thread which controls output. */
__small_sprintf (buf, OUTPUT_DONE_EVENT, ttynum);
output_done_event = OpenEvent (EVENT_ALL_ACCESS, TRUE, buf);
if (!(output_mutex = get_ttyp()->open_output_mutex (TRUE)))
{
termios_printf ("open output mutex failed, %E");
__seterrno ();
return 0;
}
/* The ioctl events may or may not exist. See output_done_event,
above. */
__small_sprintf (buf, IOCTL_REQUEST_EVENT, ttynum);
ioctl_request_event = OpenEvent (EVENT_ALL_ACCESS, TRUE, buf);
__small_sprintf (buf, IOCTL_DONE_EVENT, ttynum);
ioctl_done_event = OpenEvent (EVENT_ALL_ACCESS, TRUE, buf);
/* FIXME: Needs a method to eliminate tty races */
{
acquire_output_mutex (500);
inuse = get_ttyp ()->create_inuse (TTY_SLAVE_ALIVE);
get_ttyp ()->was_opened = TRUE;
release_output_mutex ();
}
/* Duplicate tty handles. */
if (!get_ttyp ()->from_slave || !get_ttyp ()->to_slave)
{
termios_printf ("tty handles have been closed");
set_errno (EACCES);
return 0;
}
HANDLE tty_owner = OpenProcess (PROCESS_DUP_HANDLE, FALSE,
get_ttyp ()->master_pid);
if (tty_owner == NULL)
{
termios_printf ("can't open tty(%d) handle process %d",
ttynum, get_ttyp ()->master_pid);
__seterrno ();
return 0;
}
HANDLE nh;
if (!DuplicateHandle (tty_owner, get_ttyp ()->from_master, hMainProc, &nh, 0, TRUE,
DUPLICATE_SAME_ACCESS))
{
termios_printf ("can't duplicate input, %E");
__seterrno ();
return 0;
}
set_io_handle (nh);
termios_printf ("duplicated from_master %p->%p from tty_owner %p",
get_ttyp ()->from_master, nh, tty_owner);
if (!DuplicateHandle (tty_owner, get_ttyp ()->to_master, hMainProc, &nh, 0, TRUE,
DUPLICATE_SAME_ACCESS))
{
termios_printf ("can't duplicate output, %E");
__seterrno ();
return 0;
}
set_output_handle (nh);
CloseHandle (tty_owner);
termios_printf("tty%d opened", ttynum);
return 1;
}
void
fhandler_tty_slave::init (HANDLE, DWORD a, mode_t)
{
int mode = 0;
a &= GENERIC_READ | GENERIC_WRITE;
if (a == GENERIC_READ)
mode = O_RDONLY;
if (a == GENERIC_WRITE)
mode = O_WRONLY;
if (a == (GENERIC_READ | GENERIC_WRITE))
mode = O_RDWR;
open (0, mode);
}
int
fhandler_tty_slave::write (const void *ptr, size_t len)
{
DWORD n, towrite = len;
termios_printf("tty%d, write(%x, %d)", ttynum, ptr, len);
acquire_output_mutex (INFINITE);
while (len)
{
n = min (OUT_BUFFER_SIZE, len);
char *buf = (char *)ptr;
ptr = (char *) ptr + n;
len -= n;
if (WriteFile (get_output_handle (), buf, n, &n, NULL) == FALSE)
{
DWORD err = GetLastError ();
termios_printf ("WriteFile failed, %E");
switch (err)
{
case ERROR_NO_DATA:
err = ERROR_IO_DEVICE;
default:
__seterrno ();
}
_raise (SIGHUP); /* FIXME: Should this be SIGTTOU? */
towrite = (DWORD) -1;
break;
}
if (output_done_event != NULL)
{
DWORD rc;
DWORD x = n * 1000;
rc = WaitForSingleObject (output_done_event, x);
termios_printf("waited %d ms for output_done_event, WFSO %d", x, rc);
}
if (get_ttyp ()->write_retval < 0)
{
set_errno (-get_ttyp ()->write_retval);
towrite = (DWORD) -1;
break;
}
}
release_output_mutex ();
return towrite;
}
int
fhandler_tty_slave::read (void *ptr, size_t len)
{
DWORD n;
int totalread = 0;
int vmin = INT_MAX;
int vtime = 0; /* Initialized to prevent -Wuninitialized warning */
char buf[INP_BUFFER_SIZE];
termios_printf("read(%x, %d) handle %d", ptr, len, get_handle ());
if (!(get_ttyp ()->ti.c_lflag & ICANON))
{
vmin = get_ttyp ()->ti.c_cc[VMIN];
vtime = get_ttyp ()->ti.c_cc[VTIME];
}
while (len)
{
size_t readlen = min ((unsigned) vmin, min (len, sizeof (buf)));
termios_printf ("reading %d bytes (vtime %d)",
min ((unsigned) vmin, min (len, sizeof (buf))), vtime);
n = get_readahead_into_buffer (buf, readlen);
if (!n && ReadFile (get_handle (), buf, readlen, &n, NULL) == FALSE)
{
termios_printf ("read failed, %E");
_raise (SIGHUP);
}
if (get_ttyp ()->read_retval < 0) // read error
{
set_errno (-get_ttyp ()->read_retval);
totalread = -1;
break;
}
if (get_ttyp ()->read_retval == 0) //EOF
{
termios_printf ("saw EOF");
break;
}
len -= n;
totalread += n;
memcpy (ptr, buf, n);
ptr = (char *) ptr + n;
if (get_ttyp ()->ti.c_lflag & ICANON)
break;
else if (totalread >= vmin)
break;
if (!PeekNamedPipe (get_handle (), NULL, 0, NULL, &n, NULL))
{
termios_printf("PeekNamedPipe failed, %E");
break;
}
if (n == 0)
{
if (get_flags () & (O_NONBLOCK | O_NDELAY))
break;
/* We can't enter the blocking Readfile as signals will be lost.
* So, poll the pipe for data.
* FIXME: try to avoid polling...
* FIXME: Current EINTR scheme does not take vmin/vtime into account.
*/
if (!(get_ttyp ()->ti.c_lflag & ICANON))
{
termios_printf("vmin %d vtime %d", vmin, vtime);
if (vmin == 0 && vtime == 0)
return 0; // min = 0, time = 0
if (vtime == 0)
continue; // min > 0, time = 0
while (vtime--)
{
PeekNamedPipe (get_handle (), NULL, 0, NULL, &n, NULL);
if (n)
break;
Sleep(10);
}
if (vtime == 0)
return totalread;
}
}
}
termios_printf ("%d=read(%x, %d)", totalread, ptr, len);
return totalread;
}
int
fhandler_tty_common::dup (fhandler_base *child)
{
fhandler_tty_slave *fts = (fhandler_tty_slave *) child;
int errind;
fts->ttynum = ttynum;
fts->tcinit (get_ttyp ());
attach_tty (ttynum);
HANDLE nh;
if (output_done_event == NULL)
fts->output_done_event = NULL;
else if (!DuplicateHandle (hMainProc, output_done_event, hMainProc,
&fts->output_done_event, 0, 1,
DUPLICATE_SAME_ACCESS))
{
errind = 1;
goto err;
}
if (ioctl_request_event == NULL)
fts->ioctl_request_event = NULL;
else if (!DuplicateHandle (hMainProc, ioctl_request_event, hMainProc,
&fts->ioctl_request_event, 0, 1,
DUPLICATE_SAME_ACCESS))
{
errind = 2;
goto err;
}
if (ioctl_done_event == NULL)
fts->ioctl_done_event = NULL;
else if (!DuplicateHandle (hMainProc, ioctl_done_event, hMainProc,
&fts->ioctl_done_event, 0, 1,
DUPLICATE_SAME_ACCESS))
{
errind = 3;
goto err;
}
if (!DuplicateHandle (hMainProc, output_mutex, hMainProc,
&fts->output_mutex, 0, 1,
DUPLICATE_SAME_ACCESS))
{
errind = 4;
goto err;
}
if (!DuplicateHandle (hMainProc, get_handle (), hMainProc,
&nh, 0, 1,
DUPLICATE_SAME_ACCESS))
{
errind = 5;
goto err;
}
fts->set_io_handle (nh);
if (!DuplicateHandle (hMainProc, get_output_handle (), hMainProc,
&nh, 0, 1,
DUPLICATE_SAME_ACCESS))
{
errind = 6;
goto err;
}
fts->set_output_handle (nh);
if (inuse == NULL)
fts->inuse = NULL;
else if (!DuplicateHandle (hMainProc, inuse, hMainProc,
&fts->inuse, 0, 1,
DUPLICATE_SAME_ACCESS))
{
errind = 7;
goto err;
}
return 0;
err:
__seterrno ();
termios_printf ("dup %d failed in DuplicateHandle, %E", errind);
return -1;
}
int
fhandler_tty_slave::tcgetattr (struct termios *t)
{
*t = get_ttyp ()->ti;
return 0;
}
int
fhandler_tty_slave::tcsetattr (int, const struct termios *t)
{
acquire_output_mutex (INFINITE);
get_ttyp ()->ti = *t;
release_output_mutex ();
return 0;
}
int
fhandler_tty_slave::tcflush (int)
{
return 0;
}
int
fhandler_tty_slave::ioctl (unsigned int cmd, void *arg)
{
termios_printf ("ioctl (%x)", cmd);
if (myself->pgid && get_ttyp ()->getpgid () != myself->pgid &&
myself->ctty == ttynum && (get_ttyp ()->ti.c_lflag & TOSTOP))
{
/* background process */
termios_printf("bg ioctl pgid %d, tpgid %d, ctty %d",
myself->pgid, get_ttyp ()->getpgid (), myself->ctty);
_raise (SIGTTOU);
}
switch (cmd)
{
case TIOCGWINSZ:
case TIOCSWINSZ:
break;
case FIONBIO:
if (* (int *) arg)
set_flags (get_flags () | O_NONBLOCK);
else
set_flags (get_flags () & ~O_NONBLOCK);
goto out;
default:
set_errno (EINVAL);
return -1;
}
acquire_output_mutex (INFINITE);
get_ttyp ()->cmd = cmd;
get_ttyp ()->ioctl_retval = 0;
switch (cmd)
{
case TIOCGWINSZ:
get_ttyp ()->arg.winsize = get_ttyp ()->winsize;
if (ioctl_request_event)
SetEvent (ioctl_request_event);
* (struct winsize *) arg = get_ttyp ()->arg.winsize;
if (ioctl_done_event)
WaitForSingleObject (ioctl_done_event, INFINITE);
get_ttyp ()->winsize = get_ttyp ()->arg.winsize;
break;
case TIOCSWINSZ:
get_ttyp ()->ioctl_retval = -1;
get_ttyp ()->arg.winsize = * (struct winsize *) arg;
if (ioctl_request_event)
SetEvent (ioctl_request_event);
if (ioctl_done_event)
WaitForSingleObject (ioctl_done_event, INFINITE);
break;
}
release_output_mutex ();
out:
termios_printf ("%d = ioctl (%x)", get_ttyp ()->ioctl_retval, cmd);
return get_ttyp ()->ioctl_retval;
}
/*******************************************************
fhandler_pty_master
*/
fhandler_pty_master::fhandler_pty_master (const char *name, DWORD devtype, int unit) :
fhandler_tty_common (devtype, name, unit)
{
set_cb (sizeof *this);
ioctl_request_event = NULL;
ioctl_done_event = NULL;
restart_output_event = NULL;
pktmode = need_nl = 0;
inuse = NULL;
}
int
fhandler_pty_master::open (const char *, int flags, mode_t)
{
ttynum = cygwin_shared->tty.allocate_tty (0);
if (ttynum < 0)
return 0;
cygwin_shared->tty[ttynum]->common_init (this);
inuse = get_ttyp ()->create_inuse (TTY_MASTER_ALIVE);
set_flags (flags);
termios_printf ("opened pty master tty%d<%p>", ttynum, this);
return 1;
}
int
fhandler_tty_common::close ()
{
if (output_done_event && !CloseHandle (output_done_event))
termios_printf ("CloseHandle (output_done_event), %E");
if (ioctl_done_event && !CloseHandle (ioctl_done_event))
termios_printf ("CloseHandle (ioctl_done_event), %E");
if (ioctl_request_event && !CloseHandle (ioctl_request_event))
termios_printf ("CloseHandle (ioctl_request_event), %E");
if (restart_output_event && !CloseHandle (restart_output_event))
termios_printf ("CloseHandle (restart_output_event), %E");
if (inuse && !CloseHandle (inuse))
termios_printf ("CloseHandle (inuse), %E");
if (!ForceCloseHandle (output_mutex))
termios_printf ("CloseHandle (output_mutex<%p>), %E", output_mutex);
if (!CloseHandle (get_handle ()))
termios_printf ("CloseHandle (get_handle ()<%p>), %E", get_handle ());
if (!CloseHandle (get_output_handle ()))
termios_printf ("CloseHandle (get_output_handle ()<%p>), %E", get_output_handle ());
inuse = NULL;
termios_printf ("tty%d closed", ttynum);
return 0;
}
int
fhandler_pty_master::close ()
{
#if 0
while (accept_input () > 0)
continue;
#endif
this->fhandler_tty_common::close ();
if (!get_ttyp ()->master_alive ())
{
termios_printf ("freeing tty%d (%d)", ttynum, get_ttyp ()->ntty);
if (get_ttyp ()->to_slave)
CloseHandle (get_ttyp ()->to_slave);
if (get_ttyp ()->from_slave)
CloseHandle (get_ttyp ()->from_slave);
if (get_ttyp ()->from_master)
CloseHandle (get_ttyp ()->from_master);
if (get_ttyp ()->to_master)
CloseHandle (get_ttyp ()->to_master);
get_ttyp ()->init ();
}
return 0;
}
int
fhandler_pty_master::write (const void *ptr, size_t len)
{
line_edit ((char *) ptr, len);
return len;
}
int
fhandler_pty_master::read (void *ptr, size_t len)
{
int x = process_slave_output ((char *) ptr, len, pktmode);
if (output_done_event != NULL)
SetEvent (output_done_event);
return x;
}
int
fhandler_pty_master::tcgetattr (struct termios *t)
{
*t = cygwin_shared->tty[ttynum]->ti;
return 0;
}
int
fhandler_pty_master::tcsetattr (int, const struct termios *t)
{
cygwin_shared->tty[ttynum]->ti = *t;
return 0;
}
int
fhandler_pty_master::tcflush (int)
{
return 0;
}
int
fhandler_pty_master::ioctl (unsigned int cmd, void *arg)
{
switch (cmd)
{
case TIOCPKT:
pktmode = * (int *) arg;
break;
case TIOCGWINSZ:
* (struct winsize *) arg = get_ttyp ()->winsize;
break;
case TIOCSWINSZ:
get_ttyp ()->winsize = * (struct winsize *) arg;
_kill (-get_ttyp ()->getpgid (), SIGWINCH);
break;
case FIONBIO:
if (* (int *) arg)
set_flags (get_flags () | O_NONBLOCK);
else
set_flags (get_flags () & ~O_NONBLOCK);
break;
default:
set_errno (EINVAL);
return -1;
}
return 0;
}
char *
fhandler_pty_master::ptsname (void)
{
static char buf[32];
__small_sprintf (buf, "/dev/tty%d", ttynum);
return buf;
}
void
fhandler_tty_common::set_close_on_exec (int val)
{
this->fhandler_base::set_close_on_exec (val);
if (output_done_event)
set_inheritance (output_done_event, val);
if (ioctl_request_event)
set_inheritance (ioctl_request_event, val);
if (ioctl_done_event)
set_inheritance (ioctl_done_event, val);
if (inuse)
set_inheritance (inuse, val);
set_inheritance (output_mutex, val, "output_mutex");
set_inheritance (output_handle, val);
}
void
fhandler_tty_common::fixup_after_fork (HANDLE parent)
{
this->fhandler_base::fixup_after_fork (parent);
if (output_done_event)
fork_fixup (parent, output_done_event, "output_done_event");
if (ioctl_request_event)
fork_fixup (parent, ioctl_request_event, "ioctl_request_event");
if (ioctl_done_event)
fork_fixup (parent, ioctl_done_event, "ioctl_done_event");
if (output_mutex)
{
fork_fixup (parent, output_mutex, "output_mutex");
ProtectHandle (output_mutex);
}
fork_fixup (parent, output_handle, "output_handle");
fork_fixup (parent, inuse, "inuse");
}
void
fhandler_pty_master::set_close_on_exec (int val)
{
this->fhandler_tty_common::set_close_on_exec (val);
set_inheritance (restart_output_event, val);
/* FIXME: There is a console handle leak here. */
if (get_ttyp ()->master_pid == GetCurrentProcessId ())
{
get_ttyp ()->from_slave = get_handle ();
get_ttyp ()->to_slave = get_output_handle ();
}
}
void
fhandler_pty_master::fixup_after_fork (HANDLE child)
{
this->fhandler_tty_common::fixup_after_fork (child);
if (restart_output_event)
fork_fixup (child, restart_output_event, "restart_output_event");
}
void
fhandler_tty_master::fixup_after_fork (HANDLE child)
{
this->fhandler_pty_master::fixup_after_fork (child);
console->fixup_after_fork (child);
}
void
fhandler_tty_master::fixup_after_exec (HANDLE)
{
console->close ();
init_console ();
return;
}
int
fhandler_tty_master::init_console ()
{
console = (fhandler_console *) fdtab.build_fhandler (-1, FH_CONSOLE, "/dev/ttym");
if (console == NULL)
return -1;
console->init (INVALID_HANDLE_VALUE, GENERIC_READ | GENERIC_WRITE, O_BINARY);
console->set_r_no_interrupt (1);
return 0;
}