newlib-cygwin/winsup/cygwin/termios.cc

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/* termios.cc: termios for WIN32.
Copyright 1996, 1997, 1998, 2000, 2001, 2002 Red Hat, Inc.
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Written by Doug Evans and Steve Chamberlain of Cygnus Support
dje@cygnus.com, sac@cygnus.com
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 "cygwin/version.h"
#include <signal.h>
#include <stdlib.h>
#include "cygerrno.h"
#include "security.h"
Add "path.h" include throughout, where needed. Use new path_conv methods and operators to simplify testing for directory and attributes, throughout. * path.h (path_conv::exists): New method. (path_conv::has_attribute): Ditto. (path_conv::isdir): Ditto. (path_conv::DWORD &): New operator. (path_conv::int &): Ditto. * dir.cc (rmdir): Eliminate a goto. * dtable.cc (dtable::build_fhandler): Accept opt and suffix info for path_conv.check. Return fh == NULL on path_conv error. Pass unit to set_name as appropriate. (dtable::reset_unix_path_name): New method. * dtable.h (dtable): Declare new method. Reflect arg changes to build_fhandler. * fhandler.cc (fhandler_disk_dummy_name): Eliminate. (fhandler_base::set_name): Expect paths to be NULL. Build unix_path_name from win32_path_name when it is a device. (fhandler_base::reset_unix_path_name): New method. (fhandler_base::raw_read): Report EISDIR when ERROR_INVALID_FUNCTION or ERROR_INVALID_PARAMETER and reading a directory. (fhandler_disk_file::fstat): Don't call stat_dev since we should now never be calling fhandler_disk_file methods with devices. (fhandler_base::fhandler_base): Clear {unix,win32}_path_name. (fhandler_base::~fhandler_base): Always free {unix,win32}_path_name. (fhandler_disk_file::fhandler_disk_file): Remove set_no_free_names kludge. (fhandler_disk_file::open): Ditto. * fhandler.h (fhandler_base::no_free_names): Eliminate. (fhandler_base::set_no_free_names): Ditto. * fhandler_tty.cc (fhandler_tty_slave::fhandler_tty_slave): Don't set unix_path_name here. * path.cc (fchdir): Lock fd table throughout. Use new dtable::reset_unix_path_name method to reset path. * syscalls.cc (stat_worker): Reorganize to always call fstat method. Pass path_conv method to fhandler_*::open. (chroot): Elminate a goto.
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#include "path.h"
* devices.cc: New file. * devices.gperf: New file. * devices.shilka: New file. * cygwin-gperf: New file. * cygwin-shilka: New file. * fhandler_fifo.cc: New file. * fhandler_nodevice.cc : New file. Reorganize headers so that path.h precedes fhandler.h throughout. Remove device argument and unit arguments from fhandler constructors throughout. Remove pc arguments to fhandler functions and use internal pc element instead, throughout. Use dev element in pc throughout. Use major/minor elements rather than units and device numbers previously in fhandler class. Use correct methods for fhandler file names rather than directly accessing file name variables, throughout. * Makefile.in (DLL_OFILES): Add devices.o, fhandler_fifo.o * dcrt0.cc (dll_crt0_1): Call device::init. * devices.h: Renumber devices based on more Linux-like major/minor numbers. Add more devices. Declare standard device storage. (device): Declare struct. * dir.cc (opendir): Use new 'build_fh_name' to construct a fhandler_* type. * dtable.cc (dtable::get_debugger_info): Ditto. (cygwin_attach_handle_to_fd): Ditto. (dtable::release): Remove special FH_SOCKET case in favor of generic "need_fixup_before" test. (dtable::init_std_file_from_handle): Use either build_fh_dev or build_fh_name to build standard fhandler. (dtable::build_fh_name): Renamed from dtable::build_fhandler_from_name. Move out of dtable class. Don't accept a path_conv argument. Just build it here and pass it to: (build_fh_pc): Renamed from dtable::build_fhandler. Move out of dtable class. Use intrinsic device type in path_conv to create new fhandler. (build_fh_dev): Renamed from dtable::build_fhandler. Move out of dtable class. Simplify arguments to just take new 'device' type and a name. Just return pointer to fhandler rather than trying to insert into dtable. (dtable::dup_worker): Accommodate above build_fh name changes. (dtable::find_fifo): New (currently broken) function. (handle_to_fn): Use strechr for efficiency. * dtable.h: Reflect above build_fh name changes and argument differences. (fhandler_base *&operator []): Return self rather than copy of self. * fhandler.cc (fhandler_base::operator =): Use pc element to set normalized path. (fhandler_base::set_name): Ditto. (fhandler_base::raw_read): Use method to access name. (fhandler_base::write): Correctly use get_output_handle rather than get_handle. (handler_base::device_access_denied): New function. (fhandler_base::open): Eliminate pc argument and use pc element of fhandler_base throughout. (fhandler_base::fstat): Detect if device is based in filesystem and use fstat_fs to calculate stat, if so. (fhandler_base::fhandler_base): Eliminate handling of file names and, instead, just free appropriate component from pc. (fhandler_base::opendir): Remove path_conv parameter. * fhandler.h: Remove all device flags. (fhandler_base::pc): New element. (fhandler_base::set_name): Change argument to path_conv. (fhandler_base::error): New function. (fhandler_base::exists): New function. (fhandler_base::pc_binmode): New function. (fhandler_base::dev): New function. (fhandler_base::open_fs): New function. (fhandler_base::fstat_fs): New function. (fhandler_base::fstat_by_name): New function. (fhandler_base::fstat_by_handle): New function. (fhandler_base::isfifo): New function. (fhandler_base::is_slow): New function. (fhandler_base::is_auto_device): New function. (fhandler_base::is_fs_special): New function. (fhandler_base::device_access_denied): New function. (fhandler_base::operator DWORD&): New operator. (fhandler_base::get_name): Return normalized path from pc. (fhandler_base::get_win32_name): Return windows path from pc. (fhandler_base::isdevice): Renamed from is_device. (fhandler_base::get_native_name): Return device format. (fhandler_fifo): New class. (fhandler_nodevice): New class. (select_stuff::device_specific): Remove array. (select_stuff::device_specific_pipe): New class element. (select_stuff::device_specific_socket): New class element. (select_stuff::device_specific_serial): New class element. (select_stuff::select_stuff): Initialize new elements. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Move to base class from fhandler_disk_file. (fhandler_base::fstat_by_name): Ditto. (fhandler_base::fstat_by_name): Ditto. (fhandler_disk_file::open): Move most functionality into fhandler_base::open_fs. (fhandler_base::open_fs): New function. (fhandler_disk_file::close): Move most functionality into fhandler_base::close_fs. (fhandler_base::close_fs): New function. * fhandler_mem.cc (fhandler_dev_mem::open): Use device name in debugging output. * fhandler_socket.cc (fhandler_socket::set_connect_secret): Copy standard urandom device into appropriate place. (fhandler_socket::accept): Reflect change in fdsock return value. * fhandler_tty.cc: See "throughouts" above. * net.cc: Accommodate fdsock change throughout. (fdsock): Return success or failure, accept fd argument and device argument. * path.cc (symlink_info::major): New element. (symlink_info::minor): New element. (symlink_info::parse_device): Declare new function. (fs_info::update): Accommodate changes in path_conv class. (path_conv::fillin): Ditto. (path_conv::return_and_clear_normalized_path): Eliminate. (path_conv::set_normalized_path): New function. (path_conv::path_conv): Set info in dev element. Use path_conv methods Check for FH_FS rather than FH_BAD to indicate when to fill in filesystem stuff. where appropriate rather than direct access. Use set_normalized_path to set normalized path. (windows_device_names): Eliminate. (get_dev): Ditto. (get_raw_device_number): Ditto. (get_device_number): Ditto. (win32_device_name): Call new device name parser to do most of the heavy lifting. (mount_info::conv_to_win32_path): Fill in dev field as appropriate. (symlink_worker): Handle new device files. (symlink_info::check): Ditto. (symlink_info::parse_device): Define new function. * path.h (executable_states): Move here from fhandler.h. (fs_info): Rename variables to *_storage and create methods for accessing same. (path_conv): Add dev element, remove devn and unit and adjust inline methods to accommodate. (set_normalized_path): Declare new function. * pinfo.cc (_pinfo::commune_recv): Add broken support for handling fifos. (_pinfo::commune_send): Ditto. * pipe.cc (fhandler_pipe::close): check for existence of handle before closing it. (handler_pipe::create): Rename from make_pipe. Change arguments to accept fhandler_pipe array. Accommodate fifos. (pipe): Rework to deal with fhandler_pipe::create changes. (_pipe): Ditto. * select.cc: Use individual device_specific types throughout rather than indexing with obsolete device number. (set_bits): Use is_socket call rather than checking device number. * shared_info.h (CURR_MOUNT_MAGIC): Update. (conv_to_win32_path): Reflect addition of device argument. * syscalls.cc (mknod_worker): New function. (open): Use build_fh_name to build fhandler. (chown_worker): Detect if this is an 'auto' device rather than an on-filesystem device and handle appropriately. (chmod_device): New function. (chmod): Detect if this is an 'auto' device rather than an on-filesystem device and handle appropriately. Use chmod_device to set mode of in-filesystem devices. (stat_worker): Eliminate path_conv argument. Call build_fh_name to construct fhandler. Use fh->error() rather than pc->error to detect errors in fhandler construction. (access_worker): New function pulled from access. Accommodate in-filesystem devices. (access): Use access_worker. (fpathconf): Detect if this is an 'auto' device rather than an on-filesystem device and handle appropriately. (mknod_worker): New function. (mknod32): New function. (chroot): Free normalized path -- assuming it was actually cmalloced. * tty.cc (create_tty_master): Tweak for new device class. (tty::common_init): Ditto. * winsup.h (stat_worker): Remove. (symlink_worker): Declare. * exceptions.cc (set_process_mask): Just call sig_dispatch_pending and don't worry about pending_signals since sig_dispatch_pending should always do the right thing now. (sig_handle): Reorganize SIGCONT handling to more closely conform to SUSv3. * pinfo.h: Move __SIG enum to sigproc.h. (PICOM_FIFO): New enum element. (_pinfo): Remove 'thread2signal' stuff throughout class. (_pinfo::commune_send): Make varargs. (_pinfo::sigtodo): Eliminate. (_pinfo::thread2signal): Ditto. * signal.cc (kill_worker): Eliminate call to setthread2signal. * sigproc.cc (local_sigtodo): Eliminate. (getlocal_sigtodo): Ditto. (sigelem): New class. (pending_signals): New class. (sigqueue): New variable, start of sigqueue linked list. (sigcatch_nonmain): Eliminate. (sigcatch_main): Eliminate. (sigcatch_nosync): Eliminate. (sigcomplete_nonmain): Eliminate. (pending_signals): Eliminate. (sig_clear): Call signal thread to clear pending signals, unless already in signal thread. (sigpending): Call signal thread to get pending signals. (sig_dispatch_pending): Eliminate use of pending_signals and just check sigqueue. (sigproc_terminate): Eliminate all of the obsolete semaphore stuff. Close signal pipe handle. (sig_send): Eliminate all of the obsolete semaphore stuff and use pipe to send signals. (getevent): Eliminate. (pending_signals::add): New function. (pending_signals::del): New function. (pending_signals::next): New function. (wait_sig): Eliminate all of the obsolete semaphore stuff. Use pipe to communicate and maintain a linked list of signals. * sigproc.h: Move __SIG defines here. Add __SIGPENDING. (sig_dispatch_pending): Remove "C" specifier. (sig_handle): Accept a mask argument. * thread.cc: Remove signal handling considerations throughout.
2003-09-25 08:37:18 +08:00
#include "fhandler.h"
#include "dtable.h"
#include "cygheap.h"
#include "perprocess.h"
#include "sigproc.h"
Rename _threadinfo to _cygtls, throughout. * cygtls.h (_cygtls::call_signal_handler): Rename from call_signal_handler_now. (_cygtls::push): Make second argument mandatory. (_cygtls::fixup_after_fork): Declare new function. (_cygtls::lock): Ditto. * cygtls.cc (_cygtls::fixup_after_fork): Define new function. * dcrt0.cc (cygwin_finished_initializing): Define as bool. (alloc_stack): Use _tlstop rather than arbitrary variable in probably vain attempt to avoid strange fork problem on CTRL-C. (dll_crt0_0): Remove obsolete winpids::init call. * dll_init.cc (dll_dllcrt0): Detect forkee condition as equivalent to initializing. * winsup.h (cygwin_finished_initializing): Declare as bool. * exceptions.cc (handle_exceptions): Rely on cygwin_finished_initializing to determine how to handle exception during process startup. (_cygtls::call_signal_handler): Rename from call_signal_handler_now. (_cygtls::interrupt_now): Fill in second argument to push. (signal_fixup_after_fork): Eliminate. (setup_handler): Initialize locked to avoid potential inappropriate unlock. Resume thread if it has acquired the stack lock. (ctrl_c_handler): Just exit if ctrl-c is hit before cygiwn has finished initializing. * fork.cc (sync_with_child): Don't call abort since it can cause exit deadlocks. (sync_with_child): Change debugging output slightly. (fork_child): Set cygwin_finished_initializing here. Call _cygtls fork fixup and explicitly call sigproc_init. (fork_parent): Release malloc lock on fork failure. (vfork): Call signal handler via _my_tls. * sigproc.cc (sig_send): Ditto. * syscalls.cc (readv): Ditto. * termios.cc (tcsetattr): Ditto. * wait.cc (wait4): Ditto. * signal.cc (nanosleep): Ditto. (abort): Ditto. (kill_pgrp): Avoid killing self if exiting. * sync.cc (muto::acquire): Remove (temporarily?) ill-advised exiting_thread check. * gendef (_sigfe): Be more agressive in protecting stack pointer from other access by signal thread. (_cygtls::locked): Define new function. (_sigbe): Ditto. (_cygtls::pop): Protect edx. (_cygtls::lock): Use guaranteed method to set eax to 1. (longjmp): Aggressively protect signal stack. * miscfuncs.cc (low_priority_sleep): Reduce "sleep time" for secs == 0. * pinfo.cc (winpids::set): Counterintuitively use malloc's lock to protect simultaneous access to the pids list since there are pathological conditions which can cause malloc to call winpid. (winpids::init): Eliminate. * pinfo.h (winpids::cs): Eliminate declaration. * pinfo.h (winpids::init): Eliminate definition.
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#include "cygtls.h"
#include <sys/termios.h>
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/* tcsendbreak: POSIX 7.2.2.1 */
extern "C" int
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tcsendbreak (int fd, int duration)
{
int res = -1;
cygheap_fdget cfd (fd);
if (cfd < 0)
goto out;
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if (!cfd->is_tty ())
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set_errno (ENOTTY);
else if ((res = cfd->bg_check (-SIGTTOU)) > bg_eof)
res = cfd->tcsendbreak (duration);
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out:
syscall_printf ("%d = tcsendbreak (%d, %d)", res, fd, duration);
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return res;
}
/* tcdrain: POSIX 7.2.2.1 */
extern "C" int
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tcdrain (int fd)
{
int res = -1;
termios_printf ("tcdrain");
cygheap_fdget cfd (fd);
if (cfd < 0)
goto out;
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if (!cfd->is_tty ())
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set_errno (ENOTTY);
else if ((res = cfd->bg_check (-SIGTTOU)) > bg_eof)
res = cfd->tcdrain ();
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out:
syscall_printf ("%d = tcdrain (%d)", res, fd);
return res;
}
/* tcflush: POSIX 7.2.2.1 */
extern "C" int
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tcflush (int fd, int queue)
{
int res = -1;
cygheap_fdget cfd (fd);
if (cfd < 0)
goto out;
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if (!cfd->is_tty ())
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set_errno (ENOTTY);
else if (queue != TCIFLUSH && queue != TCOFLUSH && queue != TCIOFLUSH)
set_errno (EINVAL);
else if ((res = cfd->bg_check (-SIGTTOU)) > bg_eof)
res = cfd->tcflush (queue);
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out:
termios_printf ("%d = tcflush (%d, %d)", res, fd, queue);
return res;
}
/* tcflow: POSIX 7.2.2.1 */
extern "C" int
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tcflow (int fd, int action)
{
int res = -1;
cygheap_fdget cfd (fd);
if (cfd < 0)
goto out;
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if (!cfd->is_tty ())
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set_errno (ENOTTY);
else if ((res = cfd->bg_check (-SIGTTOU)) > bg_eof)
res = cfd->tcflow (action);
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out:
syscall_printf ("%d = tcflow (%d, %d)", res, fd, action);
return res;
}
/* tcsetattr: POSIX96 7.2.1.1 */
extern "C" int
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tcsetattr (int fd, int a, const struct termios *t)
{
int res;
t = __tonew_termios (t);
int e = get_errno ();
while (1)
{
res = -1;
cygheap_fdget cfd (fd);
if (cfd < 0)
{
e = get_errno ();
break;
}
if (!cfd->is_tty ())
{
e = ENOTTY;
break;
}
res = cfd->bg_check (-SIGTTOU);
switch (res)
{
case bg_eof:
e = get_errno ();
break;
case bg_ok:
if (cfd.isopen ())
res = cfd->tcsetattr (a, t);
e = get_errno ();
break;
case bg_signalled:
Rename _threadinfo to _cygtls, throughout. * cygtls.h (_cygtls::call_signal_handler): Rename from call_signal_handler_now. (_cygtls::push): Make second argument mandatory. (_cygtls::fixup_after_fork): Declare new function. (_cygtls::lock): Ditto. * cygtls.cc (_cygtls::fixup_after_fork): Define new function. * dcrt0.cc (cygwin_finished_initializing): Define as bool. (alloc_stack): Use _tlstop rather than arbitrary variable in probably vain attempt to avoid strange fork problem on CTRL-C. (dll_crt0_0): Remove obsolete winpids::init call. * dll_init.cc (dll_dllcrt0): Detect forkee condition as equivalent to initializing. * winsup.h (cygwin_finished_initializing): Declare as bool. * exceptions.cc (handle_exceptions): Rely on cygwin_finished_initializing to determine how to handle exception during process startup. (_cygtls::call_signal_handler): Rename from call_signal_handler_now. (_cygtls::interrupt_now): Fill in second argument to push. (signal_fixup_after_fork): Eliminate. (setup_handler): Initialize locked to avoid potential inappropriate unlock. Resume thread if it has acquired the stack lock. (ctrl_c_handler): Just exit if ctrl-c is hit before cygiwn has finished initializing. * fork.cc (sync_with_child): Don't call abort since it can cause exit deadlocks. (sync_with_child): Change debugging output slightly. (fork_child): Set cygwin_finished_initializing here. Call _cygtls fork fixup and explicitly call sigproc_init. (fork_parent): Release malloc lock on fork failure. (vfork): Call signal handler via _my_tls. * sigproc.cc (sig_send): Ditto. * syscalls.cc (readv): Ditto. * termios.cc (tcsetattr): Ditto. * wait.cc (wait4): Ditto. * signal.cc (nanosleep): Ditto. (abort): Ditto. (kill_pgrp): Avoid killing self if exiting. * sync.cc (muto::acquire): Remove (temporarily?) ill-advised exiting_thread check. * gendef (_sigfe): Be more agressive in protecting stack pointer from other access by signal thread. (_cygtls::locked): Define new function. (_sigbe): Ditto. (_cygtls::pop): Protect edx. (_cygtls::lock): Use guaranteed method to set eax to 1. (longjmp): Aggressively protect signal stack. * miscfuncs.cc (low_priority_sleep): Reduce "sleep time" for secs == 0. * pinfo.cc (winpids::set): Counterintuitively use malloc's lock to protect simultaneous access to the pids list since there are pathological conditions which can cause malloc to call winpid. (winpids::init): Eliminate. * pinfo.h (winpids::cs): Eliminate declaration. * pinfo.h (winpids::init): Eliminate definition.
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if (_my_tls.call_signal_handler ())
continue;
res = -1;
/* fall through intentionally */
default:
e = get_errno ();
break;
}
break;
}
set_errno (e);
termios_printf ("iflag %p, oflag %p, cflag %p, lflag %p, VMIN %d, VTIME %d",
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t->c_iflag, t->c_oflag, t->c_cflag, t->c_lflag, t->c_cc[VMIN],
t->c_cc[VTIME]);
termios_printf ("%d = tcsetattr (%d, %d, %x)", res, fd, a, t);
return res;
}
/* tcgetattr: POSIX 7.2.1.1 */
extern "C" int
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tcgetattr (int fd, struct termios *in_t)
{
int res = -1;
struct termios *t = __makenew_termios (in_t);
cygheap_fdget cfd (fd);
if (cfd < 0)
/* saw an error */;
else if (!cfd->is_tty ())
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set_errno (ENOTTY);
else if ((res = cfd->tcgetattr (t)) == 0)
__toapp_termios (in_t, t);
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if (res)
termios_printf ("%d = tcgetattr (%d, %p)", res, fd, in_t);
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else
termios_printf ("iflag %x, oflag %x, cflag %x, lflag %x, VMIN %d, VTIME %d",
t->c_iflag, t->c_oflag, t->c_cflag, t->c_lflag, t->c_cc[VMIN],
t->c_cc[VTIME]);
return res;
}
/* tcgetpgrp: POSIX 7.2.3.1 */
extern "C" int
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tcgetpgrp (int fd)
{
int res = -1;
cygheap_fdget cfd (fd);
if (cfd < 0)
/* saw an error */;
else if (!cfd->is_tty ())
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set_errno (ENOTTY);
else
res = cfd->tcgetpgrp ();
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termios_printf ("%d = tcgetpgrp (%d)", res, fd);
return res;
}
/* tcsetpgrp: POSIX 7.2.4.1 */
extern "C" int
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tcsetpgrp (int fd, pid_t pgid)
{
int res = -1;
cygheap_fdget cfd (fd);
if (cfd < 0)
/* saw an error */;
else if (!cfd->is_tty ())
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set_errno (ENOTTY);
else
res = cfd->tcsetpgrp (pgid);
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termios_printf ("%d = tcsetpgrp (%d, %x)", res, fd, pgid);
return res;
}
/* NIST PCTS requires not macro-only implementation */
#undef cfgetospeed
#undef cfgetispeed
#undef cfsetospeed
#undef cfsetispeed
/* cfgetospeed: POSIX96 7.1.3.1 */
extern "C" speed_t
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cfgetospeed (struct termios *tp)
{
return __tonew_termios (tp)->c_ospeed;
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}
/* cfgetispeed: POSIX96 7.1.3.1 */
extern "C" speed_t
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cfgetispeed (struct termios *tp)
{
return __tonew_termios (tp)->c_ispeed;
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}
static inline int
setspeed (speed_t &set_speed, speed_t from_speed)
{
int res;
switch (from_speed)
{
case B0:
case B50:
case B75:
case B110:
case B134:
case B150:
case B200:
case B300:
case B600:
case B1200:
case B1800:
case B2400:
case B4800:
case B9600:
case B19200:
case B38400:
case B57600:
case B115200:
case B128000:
case B230400:
case B256000:
set_speed = from_speed;
res = 0;
break;
default:
set_errno (EINVAL);
res = -1;
break;
}
return res;
}
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/* cfsetospeed: POSIX96 7.1.3.1 */
extern "C" int
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cfsetospeed (struct termios *in_tp, speed_t speed)
{
struct termios *tp = __tonew_termios (in_tp);
int res = setspeed (tp->c_ospeed, speed);
__toapp_termios (in_tp, tp);
return res;
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}
/* cfsetispeed: POSIX96 7.1.3.1 */
extern "C" int
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cfsetispeed (struct termios *in_tp, speed_t speed)
{
struct termios *tp = __tonew_termios (in_tp);
int res = setspeed (tp->c_ispeed, speed);
__toapp_termios (in_tp, tp);
return res;
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}