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console-io.c
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console-io.c
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/*
* console-io.c: ConsoleDriver internal calls
*
* Author:
* Gonzalo Paniagua Javier (gonzalo@ximian.com)
*
* Copyright (C) 2005-2008 Novell, Inc. (http://www.novell.com)
*/
#include <config.h>
#include <glib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <mono/metadata/appdomain.h>
#include <mono/metadata/object-internals.h>
#include <mono/metadata/class-internals.h>
#include <mono/metadata/domain-internals.h>
#include <mono/metadata/metadata.h>
#include <mono/metadata/threadpool.h>
/* On solaris, curses.h must come before both termios.h and term.h */
#ifdef HAVE_CURSES_H
#include <curses.h>
#endif
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifdef HAVE_TERM_H
#include <term.h>
#endif
/* Needed for FIONREAD under solaris */
#ifdef HAVE_SYS_FILIO_H
#include <sys/filio.h>
#endif
#ifndef TIOCGWINSZ
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#endif
#include <mono/metadata/console-io.h>
#include <mono/metadata/exception.h>
static gboolean setup_finished;
static gboolean atexit_called;
/* The string used to return the terminal to its previous state */
static gchar *teardown_str;
/* The string used to set the terminal into keypad xmit mode after SIGCONT is received */
static gchar *keypad_xmit_str;
#ifdef HAVE_TERMIOS_H
/* This is the last state used by Mono, used after a CONT signal is received */
static struct termios mono_attr;
#endif
#if defined (PLATFORM_WIN32) || defined (MONO_NULL_TTYDRIVER)
MonoBoolean
ves_icall_System_ConsoleDriver_Isatty (HANDLE handle)
{
MONO_ARCH_SAVE_REGS;
return (GetFileType (handle) == FILE_TYPE_CHAR);
}
MonoBoolean
ves_icall_System_ConsoleDriver_SetEcho (MonoBoolean want_echo)
{
return FALSE;
}
MonoBoolean
ves_icall_System_ConsoleDriver_SetBreak (MonoBoolean want_break)
{
return FALSE;
}
gint32
ves_icall_System_ConsoleDriver_InternalKeyAvailable (gint32 timeout)
{
return FALSE;
}
MonoBoolean
ves_icall_System_ConsoleDriver_TtySetup (MonoString *keypad, MonoString *teardown, char *verase, char *vsusp, char*intr, int **size)
{
return FALSE;
}
#else
static struct termios initial_attr;
MonoBoolean
ves_icall_System_ConsoleDriver_Isatty (HANDLE handle)
{
MONO_ARCH_SAVE_REGS;
return isatty (GPOINTER_TO_INT (handle));
}
static MonoBoolean
set_property (gint property, gboolean value)
{
struct termios attr;
gboolean callset = FALSE;
gboolean check;
MONO_ARCH_SAVE_REGS;
if (tcgetattr (STDIN_FILENO, &attr) == -1)
return FALSE;
check = (attr.c_lflag & property) != 0;
if ((value || check) && !(value && check)) {
callset = TRUE;
if (value)
attr.c_lflag |= property;
else
attr.c_lflag &= ~property;
}
if (!callset)
return TRUE;
if (tcsetattr (STDIN_FILENO, TCSANOW, &attr) == -1)
return FALSE;
mono_attr = attr;
return TRUE;
}
MonoBoolean
ves_icall_System_ConsoleDriver_SetEcho (MonoBoolean want_echo)
{
return set_property (ECHO, want_echo);
}
MonoBoolean
ves_icall_System_ConsoleDriver_SetBreak (MonoBoolean want_break)
{
return set_property (IGNBRK, !want_break);
}
gint32
ves_icall_System_ConsoleDriver_InternalKeyAvailable (gint32 timeout)
{
fd_set rfds;
struct timeval tv;
struct timeval *tvptr;
div_t divvy;
int ret, nbytes;
MONO_ARCH_SAVE_REGS;
do {
FD_ZERO (&rfds);
FD_SET (STDIN_FILENO, &rfds);
if (timeout >= 0) {
divvy = div (timeout, 1000);
tv.tv_sec = divvy.quot;
tv.tv_usec = divvy.rem;
tvptr = &tv;
} else {
tvptr = NULL;
}
ret = select (STDIN_FILENO + 1, &rfds, NULL, NULL, tvptr);
} while (ret == -1 && errno == EINTR);
if (ret > 0) {
nbytes = 0;
ret = ioctl (STDIN_FILENO, FIONREAD, &nbytes);
if (ret >= 0)
ret = nbytes;
}
return (ret > 0) ? ret : 0;
}
static gint32 cols_and_lines;
#ifdef TIOCGWINSZ
static int
terminal_get_dimensions (void)
{
struct winsize ws;
if (ioctl (STDIN_FILENO, TIOCGWINSZ, &ws) == 0)
return (ws.ws_col << 16) | ws.ws_row;
return -1;
}
#else
static int
terminal_get_dimensions (void)
{
return -1;
}
#endif
static void
tty_teardown (void)
{
MONO_ARCH_SAVE_REGS;
if (!setup_finished)
return;
if (teardown_str != NULL) {
write (STDOUT_FILENO, teardown_str, strlen (teardown_str));
g_free (teardown_str);
teardown_str = NULL;
}
tcflush (STDIN_FILENO, TCIFLUSH);
tcsetattr (STDIN_FILENO, TCSANOW, &initial_attr);
set_property (ECHO, TRUE);
setup_finished = FALSE;
}
static void
do_console_cancel_event (void)
{
static MonoClassField *cancel_handler_field;
MonoDomain *domain = mono_domain_get ();
MonoClass *klass;
MonoDelegate *load_value;
MonoMethod *method;
MonoMethodMessage *msg;
MonoMethod *im;
if (!domain->domain)
return;
klass = mono_class_from_name (mono_defaults.corlib, "System", "Console");
if (klass == NULL)
return;
if (cancel_handler_field == NULL) {
cancel_handler_field = mono_class_get_field_from_name (klass, "cancel_handler");
g_assert (cancel_handler_field);
}
mono_field_static_get_value (mono_class_vtable (domain, klass), cancel_handler_field, &load_value);
if (load_value == NULL)
return;
klass = load_value->object.vtable->klass;
method = mono_class_get_method_from_name (klass, "BeginInvoke", -1);
g_assert (method != NULL);
im = mono_get_delegate_invoke (method->klass);
msg = mono_method_call_message_new (method, NULL, im, NULL, NULL);
mono_thread_pool_add ((MonoObject *) load_value, msg, NULL, NULL);
}
static gboolean in_sigint;
static void
sigint_handler (int signo)
{
MONO_ARCH_SAVE_REGS;
if (in_sigint)
return;
in_sigint = TRUE;
do_console_cancel_event ();
in_sigint = FALSE;
}
static struct sigaction save_sigcont, save_sigint, save_sigwinch;
static void
sigcont_handler (int signo, void *the_siginfo, void *data)
{
// Ignore error, there is not much we can do in the sigcont handler.
tcsetattr (STDIN_FILENO, TCSANOW, &mono_attr);
if (keypad_xmit_str != NULL)
write (STDOUT_FILENO, keypad_xmit_str, strlen (keypad_xmit_str));
// Call previous handler
if (save_sigcont.sa_sigaction != NULL &&
save_sigcont.sa_sigaction != (void *)SIG_DFL &&
save_sigcont.sa_sigaction != (void *)SIG_IGN)
(*save_sigcont.sa_sigaction) (signo, the_siginfo, data);
}
static void
sigwinch_handler (int signo, void *the_siginfo, void *data)
{
int dims = terminal_get_dimensions ();
if (dims != -1)
cols_and_lines = dims;
// Call previous handler
if (save_sigwinch.sa_sigaction != NULL &&
save_sigwinch.sa_sigaction != (void *)SIG_DFL &&
save_sigwinch.sa_sigaction != (void *)SIG_IGN)
(*save_sigwinch.sa_sigaction) (signo, the_siginfo, data);
}
void
console_set_signal_handlers ()
{
struct sigaction sigcont, sigint, sigwinch;
memset (&sigcont, 0, sizeof (struct sigaction));
memset (&sigint, 0, sizeof (struct sigaction));
memset (&sigwinch, 0, sizeof (struct sigaction));
// Continuing
sigcont.sa_handler = (void *) sigcont_handler;
sigcont.sa_flags = 0;
sigemptyset (&sigcont.sa_mask);
sigaction (SIGCONT, &sigcont, &save_sigcont);
// Interrupt handler
sigint.sa_handler = sigint_handler;
sigint.sa_flags = 0;
sigemptyset (&sigint.sa_mask);
sigaction (SIGINT, &sigint, &save_sigint);
// Window size changed
sigwinch.sa_handler = (void *) sigwinch_handler;
sigwinch.sa_flags = 0;
sigemptyset (&sigwinch.sa_mask);
sigaction (SIGWINCH, &sigwinch, &save_sigwinch);
}
//
// Currently unused, should we ever call the restore handler?
// Perhaps before calling into Process.Start?
//
void
console_restore_signal_handlers ()
{
sigaction (SIGCONT, &save_sigcont, NULL);
sigaction (SIGINT, &save_sigint, NULL);
sigaction (SIGWINCH, &save_sigwinch, NULL);
}
MonoBoolean
ves_icall_System_ConsoleDriver_TtySetup (MonoString *keypad, MonoString *teardown, char *verase, char *vsusp, char*intr, int **size)
{
int dims;
MONO_ARCH_SAVE_REGS;
dims = terminal_get_dimensions ();
if (dims == -1){
int cols = 0, rows = 0;
char *str = getenv ("COLUMNS");
if (str != NULL)
cols = atoi (str);
str = getenv ("LINES");
if (str != NULL)
rows = atoi (str);
if (cols != 0 && rows != 0)
cols_and_lines = (cols << 16) | rows;
else
cols_and_lines = -1;
} else {
cols_and_lines = dims;
}
*size = &cols_and_lines;
*verase = '\0';
*vsusp = '\0';
*intr = '\0';
if (tcgetattr (STDIN_FILENO, &initial_attr) == -1)
return FALSE;
mono_attr = initial_attr;
mono_attr.c_lflag &= ~(ICANON);
mono_attr.c_iflag &= ~(IXON|IXOFF);
mono_attr.c_cc [VMIN] = 1;
mono_attr.c_cc [VTIME] = 0;
if (tcsetattr (STDIN_FILENO, TCSANOW, &mono_attr) == -1)
return FALSE;
*verase = initial_attr.c_cc [VERASE];
*vsusp = initial_attr.c_cc [VSUSP];
*intr = initial_attr.c_cc [VINTR];
/* If initialized from another appdomain... */
if (setup_finished)
return TRUE;
keypad_xmit_str = keypad != NULL ? mono_string_to_utf8 (keypad) : NULL;
console_set_signal_handlers ();
setup_finished = TRUE;
if (!atexit_called) {
if (teardown != NULL)
teardown_str = mono_string_to_utf8 (teardown);
atexit (tty_teardown);
}
return TRUE;
}
#endif /* !PLATFORM_WIN32 */