[PATCH v11] Cygwin: console: Fix undesired mode change at exit of non-cygwin apps
Takashi Yano <[email protected]> Tue, 21 Jul 2026 04:58:25 +0900
| Newsgroups | gmane.os.cygwin.patches |
|---|---|
| Message-ID | <[email protected]> |
Previously, if two non-cygwin apps are started and one of them
exits first, the other one loosed appropriate console mode, since
the first one restored it to tty::cygwin. This patch counts the
active console process whose pgid is pgid of the tty and if the
result is zero (means the last non-cygwin foreground process),
restore console mode. To avoid race issue between apps modifying
console mode simultaneously, this patch also introduce a mutex
named `cons_mode_mutex`.
Fixes: 48285aa36c2c ("Cygwin: console: Fix handling of Ctrl-S in Win7.")
Signed-off-by: Takashi Yano <[email protected]>
Reviewed-by: Johannes Schindelin <[email protected]>
---
v2: Stop counting up/down the counter by itself.
Use num_active_non_cygwin_apps() instead.
v3: Guard setup_for_non_cygwin_app() by cons_mode_mutex as well.
v4: Guard all mode changes in console by cons_mode_mutex.
v5: Fix the issue of mutex acquisition order.
Fix the race window around the process creation.
Improve latency of checking existence of non-cygwin apps.
Handle errors in checking existence of non-cygwin apps.
v6: Match the conditions for incrementing and decrementing the counter.
v7: Decrement the counter only if it was incremented by myself.
v8: Symlify the conditions for incrementing and decrementing the counter
a bit.
v9: Minimize the argument of set_non_cygwin_app_setup_ongoing().
v10: Set process_state before calling spawn_worker::setup() rather than
using the counter. In addition, resume non-cygwin app before
modifying process table. These make things much simpler.
Narrowing the period of acquiring input_mutex in peek_console()
in select.cc.
v11: Release output_mutex before calling bg_check() in ioctl().
Suppress unecessary console-mode change attempts.
winsup/cygwin/fhandler/console.cc | 141 ++++++++++++++++++++++--
winsup/cygwin/fhandler/termios.cc | 29 +++--
winsup/cygwin/local_includes/fhandler.h | 5 +-
winsup/cygwin/select.cc | 14 +--
winsup/cygwin/spawn.cc | 46 ++++----
5 files changed, 184 insertions(+), 51 deletions(-)
diff --git a/winsup/cygwin/fhandler/console.cc b/winsup/cygwin/fhandler/console.cc
index d4c87f29f..0219a37ef 100644
--- a/winsup/cygwin/fhandler/console.cc
+++ b/winsup/cygwin/fhandler/console.cc
@@ -977,16 +977,85 @@ fhandler_console::setup_for_non_cygwin_app ()
console mode. */
if (get_ttyp ()->getpgid () == myself->pgid)
{
+ WaitForSingleObject (cons_mode_mutex, INFINITE);
set_disable_master_thread (true, this);
set_input_mode (tty::native, &tc ()->ti, get_handle_set ());
set_output_mode (tty::native, &tc ()->ti, get_handle_set ());
+ ReleaseMutex (cons_mode_mutex);
}
}
+/* Return values
+ 0: not exist
+ 1: exist
+ -1: error */
+int
+fhandler_console::active_non_cygwin_apps_exist (pid_t pgid)
+{
+ tmp_pathbuf tp;
+ DWORD *list = (DWORD *) tp.c_get ();
+ const DWORD buf_size = NT_MAX_PATH / sizeof (DWORD);
+
+ DWORD buf_size1 = 1;
+ DWORD num;
+ /* The buffer of too large size does not seem to be expected by new condrv.
+ https://github.com/microsoft/terminal/issues/18264#issuecomment-2515448548
+ Use the minimum buffer size in the loop. */
+ while ((num = GetConsoleProcessList (list, buf_size1)) > buf_size1)
+ {
+ if (num > buf_size)
+ return -1;
+ buf_size1 = num;
+ }
+ if (num == 0)
+ return -1;
+
+ /* Last one is the oldest. */
+ /* https://github.com/microsoft/terminal/issues/95 */
+ /* Assuming that newer processes are more likely to be non-cygwin. */
+ for (DWORD i = 0; i < num; i++)
+ {
+ DWORD my_pid = myself->exec_dwProcessId ? : myself->dwProcessId;
+ if (list[i] == my_pid)
+ continue;
+ pid_t pid = cygwin_pid (list[i]);
+ if (pid == 0)
+ continue;
+ pinfo p (pid);
+ if (!!p && p->pgid == pgid && ISSTATE (p, PID_NOTCYGWIN))
+ return 1;
+ }
+ return 0;
+}
+
void
fhandler_console::cleanup_for_non_cygwin_app (handle_set_t *p)
{
const _minor_t unit = p->unit;
+ pid_t pgid = shared_console_info[unit] ?
+ shared_console_info[unit]->tty_min_state.getpgid () : 0;
+
+ WaitForSingleObject (p->cons_mode_mutex, INFINITE);
+ tty::cons_mode conmode = cons_mode_on_close (p);
+ if (con.curr_input_mode == conmode && con.curr_output_mode == conmode
+ && con.disable_master_thread == (con.owner == GetCurrentProcessId ()))
+ {
+ ReleaseMutex (p->cons_mode_mutex);
+ return;
+ }
+ switch (active_non_cygwin_apps_exist (pgid))
+ {
+ case 1: /* Exist */
+ ReleaseMutex (p->cons_mode_mutex);
+ return;
+ case 0: /* Not exist */
+ break;
+ case -1: /* Error */
+ default:
+ system_printf("Checking for existence of non-cygwin app failed.");
+ break;
+ }
+
termios dummy = {0, };
termios *ti = shared_console_info[unit] ?
&(shared_console_info[unit]->tty_min_state.ti) : &dummy;
@@ -994,11 +1063,11 @@ fhandler_console::cleanup_for_non_cygwin_app (handle_set_t *p)
set_disable_master_thread (con.owner == GetCurrentProcessId ());
/* conmode can be tty::restore when non-cygwin app is
exec'ed from login shell. */
- tty::cons_mode conmode = cons_mode_on_close (p);
if (con.curr_output_mode != conmode)
set_output_mode (conmode, ti, p);
if (con.curr_input_mode != conmode)
set_input_mode (conmode, ti, p);
+ ReleaseMutex (p->cons_mode_mutex);
}
/* Return the tty structure associated with a given tty number. If the
@@ -1055,6 +1124,10 @@ fhandler_console::setup_io_mutex (void)
if (res == WAIT_OBJECT_0)
release_output_mutex ();
+ shared_name (buf, "cygcons.cons_mode.mutex", get_minor ());
+ if (!cons_mode_mutex)
+ cons_mode_mutex = CreateMutex (&sec_none, FALSE, buf);
+
extern HANDLE attach_mutex;
if (!attach_mutex)
attach_mutex = CreateMutex (&sec_none_nih, FALSE, NULL);
@@ -1189,6 +1262,7 @@ fhandler_console::bg_check (int sig, bool dontsignal)
/* Setting-up console mode for cygwin app. This is necessary if the
cygwin app and other non-cygwin apps are started simultaneously
in the same process group. */
+ WaitForSingleObject (cons_mode_mutex, INFINITE);
if (sig == SIGTTIN && con.curr_input_mode != tty::cygwin)
{
set_disable_master_thread (false, this);
@@ -1196,6 +1270,7 @@ fhandler_console::bg_check (int sig, bool dontsignal)
}
if (sig == SIGTTOU && con.curr_output_mode != tty::cygwin)
set_output_mode (tty::cygwin, &tc ()->ti, get_handle_set ());
+ ReleaseMutex (cons_mode_mutex);
return fhandler_termios::bg_check (sig, dontsignal);
}
@@ -2010,6 +2085,7 @@ fhandler_console::open (int flags, mode_t)
if (in_is_console)
CloseHandle (h_in);
+ WaitForSingleObject (cons_mode_mutex, INFINITE);
if (in_is_console && con.curr_input_mode != tty::cygwin)
{
prev_input_mode_backup = con.prev_input_mode;
@@ -2022,6 +2098,7 @@ fhandler_console::open (int flags, mode_t)
GetConsoleMode (get_output_handle (), &con.prev_output_mode);
set_output_mode (tty::cygwin, &get_ttyp ()->ti, &handle_set);
}
+ ReleaseMutex (cons_mode_mutex);
debug_printf ("opened conin$ %p, conout$ %p", get_handle (),
get_output_handle ());
@@ -2105,6 +2182,7 @@ fhandler_console::open_setup (int flags)
handle_set.output_handle = get_output_handle ();
handle_set.input_mutex = input_mutex;
handle_set.output_mutex = output_mutex;
+ handle_set.cons_mode_mutex = cons_mode_mutex;
handle_set.unit = unit;
}
return fhandler_base::open_setup (flags);
@@ -2114,6 +2192,7 @@ void
fhandler_console::post_open_setup (int fd)
{
/* Setting-up console mode for cygwin app started from non-cygwin app. */
+ WaitForSingleObject (cons_mode_mutex, INFINITE);
if (fd == 0)
{
set_disable_master_thread (false, this);
@@ -2121,6 +2200,7 @@ fhandler_console::post_open_setup (int fd)
}
else if (fd == 1 || fd == 2)
set_output_mode (tty::cygwin, &get_ttyp ()->ti, &handle_set);
+ ReleaseMutex (cons_mode_mutex);
fhandler_base::post_open_setup (fd);
}
@@ -2130,18 +2210,20 @@ fhandler_console::close (int flag)
{
debug_printf ("closing: %p, %p", get_handle (), get_output_handle ());
- acquire_output_mutex (mutex_timeout);
-
if (shared_console_info[unit] && (dev_t) myself->ctty == get_device ()
&& cons_mode_on_close (&handle_set) == tty::restore)
{
+ WaitForSingleObject (cons_mode_mutex, INFINITE);
set_disable_master_thread (true, this);
if (con.curr_output_mode != tty::restore)
set_output_mode (tty::restore, &get_ttyp ()->ti, &handle_set);
if (con.curr_input_mode != tty::restore)
set_input_mode (tty::restore, &get_ttyp ()->ti, &handle_set);
+ ReleaseMutex (cons_mode_mutex);
}
+ acquire_output_mutex (mutex_timeout);
+
if (shared_console_info[unit] && con.owner == GetCurrentProcessId ())
{
if (master_thread_started)
@@ -2196,6 +2278,8 @@ fhandler_console::close (int flag)
input_mutex = NULL;
CloseHandle (output_mutex);
output_mutex = NULL;
+ CloseHandle (cons_mode_mutex);
+ cons_mode_mutex = NULL;
pcon_hand_over_proc ();
@@ -2245,8 +2329,8 @@ fhandler_console::ioctl (unsigned int cmd, void *arg)
release_output_mutex ();
return 0;
case TIOCSWINSZ:
- bg_check (SIGTTOU);
release_output_mutex ();
+ bg_check (SIGTTOU);
return 0;
case KDGKBMETA:
*(int *) arg = (con.metabit) ? K_METABIT : K_ESCPREFIX;
@@ -2369,10 +2453,12 @@ int
fhandler_console::tcsetattr (int a, struct termios const *t)
{
get_ttyp ()->ti = *t;
+ WaitForSingleObject (cons_mode_mutex, INFINITE);
if (con.curr_input_mode == tty::cygwin)
set_input_mode (tty::cygwin, t, &handle_set);
if (con.curr_output_mode == tty::cygwin)
set_output_mode (tty::cygwin, t, &handle_set);
+ ReleaseMutex (cons_mode_mutex);
return 0;
}
@@ -3140,10 +3226,24 @@ fhandler_console::char_command (char c)
con.cursor_key_app_mode = (c == 'h');
if (con.args[i] == 9001) /* win32-input-mode (https://github.com/microsoft/terminal/blob/main/doc/specs/%234999%20-%20Improved%20keyboard%20handling%20in%20Conpty.md) */
{
- set_disable_master_thread (c == 'h', this);
- if (con.curr_input_mode == tty::cygwin)
- set_input_mode (tty::cygwin,
- &tc ()->ti, get_handle_set ());
+ /* The correnct order of acquiring mutex should be
+ cons_mode_mutex first, then output_mutex.
+ However, here, output_mutex is already acquired.
+ So, to avoid deadlock, if another mode change is
+ on going concurrently, that one takes precedence,
+ and do not change the mode here. Even if we manage
+ to get the mutex acquisition order right, which
+ one ends up taking precedence is still a matter
+ of luck. The later one overwrites the earlier one. */
+ DWORD wret = WaitForSingleObject (cons_mode_mutex, 0);
+ if (wret == WAIT_OBJECT_0)
+ {
+ set_disable_master_thread (c == 'h', this);
+ if (con.curr_input_mode == tty::cygwin)
+ set_input_mode (tty::cygwin,
+ &tc ()->ti, get_handle_set ());
+ ReleaseMutex (cons_mode_mutex);
+ }
}
}
/* Call fix_tab_position() if screen has been alternated. */
@@ -4475,10 +4575,13 @@ fhandler_console::set_console_mode_to_native ()
fhandler_console *cons = (fhandler_console *) (fhandler_base *) cfd;
if (cons->get_device () == cons->tc ()->getntty ())
{
+ const fhandler_console::handle_set_t *p = cons->get_handle_set ();
+ WaitForSingleObject (p->cons_mode_mutex, INFINITE);
set_disable_master_thread (true, cons);
termios *cons_ti = &cons->tc ()->ti;
- set_input_mode (tty::native, cons_ti, cons->get_handle_set ());
- set_output_mode (tty::native, cons_ti, cons->get_handle_set ());
+ set_input_mode (tty::native, cons_ti, p);
+ set_output_mode (tty::native, cons_ti, p);
+ ReleaseMutex (p->cons_mode_mutex);
break;
}
}
@@ -4535,8 +4638,17 @@ ContinueDebugEvent_Hooked
static FARPROC
GetProcAddress_Hooked (HMODULE h, LPCSTR n)
{
- if (strcmp(n, "RequestTermConnector") == 0)
- fhandler_console::set_disable_master_thread (true);
+ if (cygheap->ctty && strcmp(n, "RequestTermConnector") == 0)
+ {
+ char buf[MAX_PATH];
+ const _minor_t unit = cygheap->ctty->get_minor ();
+ shared_name (buf, "cygcons.cons_mode.mutex", unit);
+ HANDLE cons_mode_mutex = CreateMutex (&sec_none, FALSE, buf);
+ WaitForSingleObject (cons_mode_mutex, INFINITE);
+ fhandler_console::set_disable_master_thread (true);
+ ReleaseMutex (cons_mode_mutex);
+ CloseHandle (cons_mode_mutex);
+ }
return GetProcAddress_Orig (h, n);
}
@@ -4817,6 +4929,9 @@ fhandler_console::get_duplicated_handle_set (handle_set_t *p)
DuplicateHandle (GetCurrentProcess (), output_mutex,
GetCurrentProcess (), &p->output_mutex,
0, FALSE, DUPLICATE_SAME_ACCESS);
+ DuplicateHandle (GetCurrentProcess (), cons_mode_mutex,
+ GetCurrentProcess (), &p->cons_mode_mutex,
+ 0, FALSE, DUPLICATE_SAME_ACCESS);
p->unit = unit;
}
@@ -4833,6 +4948,8 @@ fhandler_console::close_handle_set (handle_set_t *p)
p->input_mutex = NULL;
CloseHandle (p->output_mutex);
p->output_mutex = NULL;
+ CloseHandle (p->cons_mode_mutex);
+ p->cons_mode_mutex = NULL;
}
bool
diff --git a/winsup/cygwin/fhandler/termios.cc b/winsup/cygwin/fhandler/termios.cc
index ee576a0a8..dcd5472cc 100644
--- a/winsup/cygwin/fhandler/termios.cc
+++ b/winsup/cygwin/fhandler/termios.cc
@@ -830,20 +830,24 @@ void
fhandler_termios::spawn_worker::cleanup ()
{
if (ptys_need_cleanup)
- fhandler_pty_slave::cleanup_for_non_cygwin_app (&ptys_handle_set,
- ptys_ttyp, stdin_is_ptys);
+ {
+ fhandler_pty_slave::cleanup_for_non_cygwin_app (&ptys_handle_set,
+ ptys_ttyp, stdin_is_ptys);
+ fhandler_pty_slave::close_handle_set (&ptys_handle_set);
+ ptys_need_cleanup = false;
+ }
if (cons_need_cleanup)
- fhandler_console::cleanup_for_non_cygwin_app (&cons_handle_set);
- close_handle_set ();
+ {
+ fhandler_console::cleanup_for_non_cygwin_app (&cons_handle_set);
+ fhandler_console::close_handle_set (&cons_handle_set);
+ cons_need_cleanup = false;
+ }
}
-void
-fhandler_termios::spawn_worker::close_handle_set ()
+bool
+fhandler_termios::spawn_worker::is_attaching (DWORD pid)
{
- if (ptys_need_cleanup)
- fhandler_pty_slave::close_handle_set (&ptys_handle_set);
- if (cons_need_cleanup)
- fhandler_console::close_handle_set (&cons_handle_set);
+ return !!fhandler_termios::get_console_process_id (pid, true);
}
void
@@ -916,7 +920,10 @@ fhandler_termios::get_console_process_id (DWORD pid, bool match,
}
else
{
- pinfo p (cygwin_pid (list[i]));
+ pid_t cygpid = cygwin_pid (list[i]);
+ if (cygpid == 0)
+ continue;
+ pinfo p (cygpid);
if (nat && !!p && !ISSTATE(p, PID_NOTCYGWIN))
continue;
if (!!p && p->exec_dwProcessId)
diff --git a/winsup/cygwin/local_includes/fhandler.h b/winsup/cygwin/local_includes/fhandler.h
index d11b3ec4f..eb96435bd 100644
--- a/winsup/cygwin/local_includes/fhandler.h
+++ b/winsup/cygwin/local_includes/fhandler.h
@@ -2023,6 +2023,7 @@ class fhandler_termios: public fhandler_base
HANDLE output_handle;
HANDLE input_mutex;
HANDLE output_mutex;
+ HANDLE cons_mode_mutex;
_minor_t unit;
};
class spawn_worker
@@ -2042,7 +2043,7 @@ class fhandler_termios: public fhandler_base
bool nopcon, bool reset_sendsig, const WCHAR *envblock);
bool need_cleanup () { return ptys_need_cleanup || cons_need_cleanup; }
void cleanup ();
- void close_handle_set ();
+ bool is_attaching (DWORD pid);
};
};
@@ -2199,6 +2200,7 @@ private:
static console_state *shared_console_info[MAX_CONS_DEV + 1];
static bool invisible_console;
HANDLE input_mutex, output_mutex;
+ HANDLE cons_mode_mutex;
handle_set_t handle_set;
_minor_t unit;
size_t num_input_events_processed;
@@ -2379,6 +2381,7 @@ private:
void setup_pcon_hand_over ();
static void pcon_hand_over_proc ();
static tty::cons_mode cons_mode_on_close (handle_set_t *);
+ static int active_non_cygwin_apps_exist (pid_t pgid);
friend tty_min * tty_list::get_cttyp ();
};
diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
index b72083447..592f6d14d 100644
--- a/winsup/cygwin/select.cc
+++ b/winsup/cygwin/select.cc
@@ -1154,23 +1154,23 @@ peek_console (select_record *me, bool)
HANDLE h;
set_handle_or_return_if_not_open (h, me);
- fh->acquire_input_mutex (mutex_timeout);
while (!fh->input_ready && !fh->get_cons_readahead_valid ())
{
if (fh->bg_check (SIGTTIN, true) <= bg_eof)
- {
- fh->release_input_mutex ();
- return me->read_ready = true;
- }
+ return me->read_ready = true;
else
{
+ fh->acquire_input_mutex (mutex_timeout);
acquire_attach_mutex (mutex_timeout);
DWORD resume_pid = fh->attach_console (fh->get_owner ());
BOOL r = PeekConsoleInputW (h, &irec, 1, &events_read);
fh->detach_console (resume_pid, fh->get_owner ());
release_attach_mutex ();
if (!r || !events_read)
- break;
+ {
+ fh->release_input_mutex ();
+ break;
+ }
}
if (fhandler_console::input_winch == fh->process_input_message (0)
&& global_sigs[SIGWINCH].sa_handler != SIG_IGN
@@ -1180,8 +1180,8 @@ peek_console (select_record *me, bool)
fh->release_input_mutex ();
return -1;
}
+ fh->release_input_mutex ();
}
- fh->release_input_mutex ();
if (fh->input_ready || fh->get_cons_readahead_valid ())
return me->read_ready = true;
diff --git a/winsup/cygwin/spawn.cc b/winsup/cygwin/spawn.cc
index 8f976b9a0..8fcd89735 100644
--- a/winsup/cygwin/spawn.cc
+++ b/winsup/cygwin/spawn.cc
@@ -559,6 +559,14 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
PROCESS_QUERY_LIMITED_INFORMATION))
sa = &sec_none_nih;
+ if (!real_path.iscygexec () && mode == _P_OVERLAY)
+ {
+ LONG pidflags = PID_NOTCYGWIN;
+ if (c_flags & CREATE_NEW_PROCESS_GROUP)
+ pidflags |= PID_NEW_PG;
+ InterlockedOr ((LONG *) &myself->process_state, pidflags);
+ }
+
int fileno_stdin = in__stdin < 0 ? 0 : in__stdin;
int fileno_stdout = in__stdout < 0 ? 1 : in__stdout;
int fileno_stderr = 2;
@@ -586,14 +594,6 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
up on ruid. The new process will have ruid == euid. */
::cygheap->user.deimpersonate ();
- if (!real_path.iscygexec () && mode == _P_OVERLAY)
- {
- LONG pidflags = PID_NOTCYGWIN;
- if (c_flags & CREATE_NEW_PROCESS_GROUP)
- pidflags |= PID_NEW_PG;
- InterlockedOr ((LONG *) &myself->process_state, pidflags);
- }
-
cygpid = (mode != _P_OVERLAY) ? create_cygwin_pid () : myself->pid;
cygheap->lock ();
@@ -737,6 +737,20 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
/* Name the handle similarly to proc_subproc. */
ProtectHandle1 (pi.hProcess, childhProc);
+ /* Start the child running for non-cygwin process*/
+ if (!iscygwin () && (c_flags & CREATE_SUSPENDED))
+ {
+ /* Inject a non-inheritable wr_proc_pipe handle into child so that we
+ can accurately track when the child exits without keeping this
+ process waiting around for it to exit. */
+ DuplicateHandle (GetCurrentProcess (), wr_proc_pipe, pi.hProcess,
+ NULL, 0, false, DUPLICATE_SAME_ACCESS);
+ ResumeThread (pi.hThread);
+ if (term_spawn_worker.is_attaching (myself->dwProcessId))
+ while (!term_spawn_worker.is_attaching (pi.dwProcessId)
+ && WaitForSingleObject (pi.hProcess, 0) == WAIT_TIMEOUT);
+ }
+
if (mode == _P_OVERLAY)
{
myself->dwProcessId = pi.dwProcessId;
@@ -810,18 +824,11 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
}
}
- /* Start the child running */
- if (c_flags & CREATE_SUSPENDED)
+ /* Start the child running for cygwin process*/
+ if (iscygwin () && (c_flags & CREATE_SUSPENDED))
{
- /* Inject a non-inheritable wr_proc_pipe handle into child so that we
- can accurately track when the child exits without keeping this
- process waiting around for it to exit. */
- if (!iscygwin ())
- DuplicateHandle (GetCurrentProcess (), wr_proc_pipe, pi.hProcess, NULL,
- 0, false, DUPLICATE_SAME_ACCESS);
ResumeThread (pi.hThread);
- if (iscygwin ())
- strace.write_childpid (pi.dwProcessId);
+ strace.write_childpid (pi.dwProcessId);
}
ForceCloseHandle (pi.hThread);
@@ -868,7 +875,6 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
prev_sigExeced =
InterlockedCompareExchange (&sigExeced, 0, prev_sigExeced);
term_spawn_worker.cleanup ();
- term_spawn_worker.close_handle_set ();
}
/* Make sure that ctrl_c_handler() is not on going. Calling
init_console_handler(false) locks until returning from
@@ -906,7 +912,7 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
res = -1;
}
__endtry
- term_spawn_worker.close_handle_set ();
+ term_spawn_worker.cleanup ();
this->cleanup ();
if (envblock)
free (envblock);
--
2.51.0