380 lines
8.0 KiB
C++
380 lines
8.0 KiB
C++
/* fhandler_termios.cc
|
|
|
|
Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009,
|
|
2010, 2011 Red Hat, Inc.
|
|
|
|
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 <stdlib.h>
|
|
#include <ctype.h>
|
|
#include "cygerrno.h"
|
|
#include "path.h"
|
|
#include "fhandler.h"
|
|
#include "sigproc.h"
|
|
#include "pinfo.h"
|
|
#include "tty.h"
|
|
#include "cygtls.h"
|
|
|
|
/* Common functions shared by tty/console */
|
|
|
|
void
|
|
fhandler_termios::tcinit (tty_min *this_tc, bool is_pty_master)
|
|
{
|
|
/* Initial termios values */
|
|
|
|
tc = this_tc;
|
|
|
|
if (is_pty_master || !tc->initialized ())
|
|
{
|
|
tc->ti.c_iflag = BRKINT | ICRNL | IXON;
|
|
tc->ti.c_oflag = OPOST | ONLCR;
|
|
tc->ti.c_cflag = B38400 | CS8 | CREAD;
|
|
tc->ti.c_lflag = ISIG | ICANON | ECHO | IEXTEN;
|
|
|
|
tc->ti.c_cc[VDISCARD] = CFLUSH;
|
|
tc->ti.c_cc[VEOL] = CEOL;
|
|
tc->ti.c_cc[VEOL2] = CEOL2;
|
|
tc->ti.c_cc[VEOF] = CEOF;
|
|
tc->ti.c_cc[VERASE] = CERASE;
|
|
tc->ti.c_cc[VINTR] = CINTR;
|
|
tc->ti.c_cc[VKILL] = CKILL;
|
|
tc->ti.c_cc[VLNEXT] = CLNEXT;
|
|
tc->ti.c_cc[VMIN] = 1;
|
|
tc->ti.c_cc[VQUIT] = CQUIT;
|
|
tc->ti.c_cc[VREPRINT] = CRPRNT;
|
|
tc->ti.c_cc[VSTART] = CSTART;
|
|
tc->ti.c_cc[VSTOP] = CSTOP;
|
|
tc->ti.c_cc[VSUSP] = CSUSP;
|
|
tc->ti.c_cc[VSWTC] = CSWTCH;
|
|
tc->ti.c_cc[VTIME] = 0;
|
|
tc->ti.c_cc[VWERASE] = CWERASE;
|
|
|
|
tc->ti.c_ispeed = tc->ti.c_ospeed = B38400;
|
|
tc->pgid = is_pty_master ? 0 : myself->pgid;
|
|
tc->initialized (true);
|
|
}
|
|
}
|
|
|
|
int
|
|
fhandler_termios::tcsetpgrp (const pid_t pgid)
|
|
{
|
|
termios_printf ("tty %d pgid %d, sid %d, tsid %d", tc->ntty, pgid,
|
|
myself->sid, tc->getsid ());
|
|
if (myself->sid != tc->getsid ())
|
|
{
|
|
set_errno (EPERM);
|
|
return -1;
|
|
}
|
|
int res;
|
|
while (1)
|
|
{
|
|
res = bg_check (-SIGTTOU);
|
|
|
|
switch (res)
|
|
{
|
|
case bg_ok:
|
|
tc->setpgid (pgid);
|
|
init_console_handler (tc->gethwnd ());
|
|
res = 0;
|
|
break;
|
|
case bg_signalled:
|
|
if (_my_tls.call_signal_handler ())
|
|
continue;
|
|
set_errno (EINTR);
|
|
/* fall through intentionally */
|
|
default:
|
|
res = -1;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
int
|
|
fhandler_termios::tcgetpgrp ()
|
|
{
|
|
if (myself->ctty != -1 && myself->ctty == tc->ntty)
|
|
return tc->pgid;
|
|
set_errno (ENOTTY);
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_pty_master::tcgetpgrp ()
|
|
{
|
|
return tc->pgid;
|
|
}
|
|
|
|
void
|
|
tty_min::kill_pgrp (int sig)
|
|
{
|
|
int killself = 0;
|
|
winpids pids ((DWORD) PID_MAP_RW);
|
|
siginfo_t si = {0};
|
|
si.si_signo = sig;
|
|
si.si_code = SI_KERNEL;
|
|
for (unsigned i = 0; i < pids.npids; i++)
|
|
{
|
|
_pinfo *p = pids[i];
|
|
if (!p->exists () || p->ctty != ntty || p->pgid != pgid)
|
|
continue;
|
|
if (p == myself)
|
|
killself++;
|
|
else
|
|
sig_send (p, si);
|
|
}
|
|
if (killself)
|
|
sig_send (myself, si);
|
|
}
|
|
|
|
bg_check_types
|
|
fhandler_termios::bg_check (int sig)
|
|
{
|
|
if (!myself->pgid || tc->getpgid () == myself->pgid ||
|
|
myself->ctty != tc->ntty ||
|
|
((sig == SIGTTOU) && !(tc->ti.c_lflag & TOSTOP)))
|
|
return bg_ok;
|
|
|
|
if (sig < 0)
|
|
sig = -sig;
|
|
|
|
termios_printf ("bg I/O pgid %d, tpgid %d, %s, ntty tty%d", myself->pgid, tc->getpgid (),
|
|
myctty (), tc->ntty);
|
|
|
|
if (tc->getsid () == 0)
|
|
{
|
|
/* The pty has been closed by the master. Return an EOF
|
|
indication. FIXME: There is nothing to stop somebody
|
|
from reallocating this pty. I think this is the case
|
|
which is handled by unlockpt on a Unix system. */
|
|
termios_printf ("closed by master");
|
|
return bg_eof;
|
|
}
|
|
|
|
/* If the process group is no more or if process is ignoring or blocks 'sig',
|
|
return with error */
|
|
int pgid_gone = !pid_exists (myself->pgid);
|
|
int sigs_ignored =
|
|
((void *) global_sigs[sig].sa_handler == (void *) SIG_IGN) ||
|
|
(_main_tls->sigmask & SIGTOMASK (sig));
|
|
|
|
if (pgid_gone)
|
|
goto setEIO;
|
|
else if (!sigs_ignored)
|
|
/* nothing */;
|
|
else if (sig == SIGTTOU)
|
|
return bg_ok; /* Just allow the output */
|
|
else
|
|
goto setEIO; /* This is an output error */
|
|
|
|
/* Don't raise a SIGTT* signal if we have already been interrupted
|
|
by another signal. */
|
|
if (WaitForSingleObject (signal_arrived, 0) != WAIT_OBJECT_0)
|
|
{
|
|
siginfo_t si = {0};
|
|
si.si_signo = sig;
|
|
si.si_code = SI_KERNEL;
|
|
kill_pgrp (myself->pgid, si);
|
|
}
|
|
return bg_signalled;
|
|
|
|
setEIO:
|
|
set_errno (EIO);
|
|
return bg_error;
|
|
}
|
|
|
|
#define set_input_done(x) input_done = input_done || (x)
|
|
|
|
inline void
|
|
fhandler_termios::echo_erase (int force)
|
|
{
|
|
if (force || tc->ti.c_lflag & ECHO)
|
|
doecho ("\b \b", 3);
|
|
}
|
|
|
|
line_edit_status
|
|
fhandler_termios::line_edit (const char *rptr, int nread, termios& ti)
|
|
{
|
|
line_edit_status ret = line_edit_ok;
|
|
char c;
|
|
int input_done = 0;
|
|
bool sawsig = false;
|
|
int iscanon = ti.c_lflag & ICANON;
|
|
|
|
while (nread-- > 0)
|
|
{
|
|
c = *rptr++;
|
|
|
|
termios_printf ("char %c", c);
|
|
|
|
/* Check for special chars */
|
|
|
|
if (c == '\r')
|
|
{
|
|
if (ti.c_iflag & IGNCR)
|
|
continue;
|
|
if (ti.c_iflag & ICRNL)
|
|
{
|
|
c = '\n';
|
|
set_input_done (iscanon);
|
|
}
|
|
}
|
|
else if (c == '\n')
|
|
{
|
|
if (ti.c_iflag & INLCR)
|
|
c = '\r';
|
|
else
|
|
set_input_done (iscanon);
|
|
}
|
|
|
|
if (ti.c_iflag & ISTRIP)
|
|
c &= 0x7f;
|
|
if (ti.c_lflag & ISIG)
|
|
{
|
|
int sig;
|
|
if (CCEQ (ti.c_cc[VINTR], c))
|
|
sig = SIGINT;
|
|
else if (CCEQ (ti.c_cc[VQUIT], c))
|
|
sig = SIGQUIT;
|
|
else if (CCEQ (ti.c_cc[VSUSP], c))
|
|
sig = SIGTSTP;
|
|
else
|
|
goto not_a_sig;
|
|
|
|
termios_printf ("got interrupt %d, sending signal %d", c, sig);
|
|
eat_readahead (-1);
|
|
tc->kill_pgrp (sig);
|
|
ti.c_lflag &= ~FLUSHO;
|
|
sawsig = true;
|
|
goto restart_output;
|
|
}
|
|
not_a_sig:
|
|
if (ti.c_iflag & IXON)
|
|
{
|
|
if (CCEQ (ti.c_cc[VSTOP], c))
|
|
{
|
|
if (!tc->output_stopped)
|
|
{
|
|
tc->output_stopped = 1;
|
|
acquire_output_mutex (INFINITE);
|
|
}
|
|
continue;
|
|
}
|
|
else if (CCEQ (ti.c_cc[VSTART], c))
|
|
{
|
|
restart_output:
|
|
tc->output_stopped = 0;
|
|
release_output_mutex ();
|
|
continue;
|
|
}
|
|
else if ((ti.c_iflag & IXANY) && tc->output_stopped)
|
|
goto restart_output;
|
|
}
|
|
if (iscanon && ti.c_lflag & IEXTEN && CCEQ (ti.c_cc[VDISCARD], c))
|
|
{
|
|
ti.c_lflag ^= FLUSHO;
|
|
continue;
|
|
}
|
|
if (!iscanon)
|
|
/* nothing */;
|
|
else if (CCEQ (ti.c_cc[VERASE], c))
|
|
{
|
|
if (eat_readahead (1))
|
|
echo_erase ();
|
|
continue;
|
|
}
|
|
else if (CCEQ (ti.c_cc[VWERASE], c))
|
|
{
|
|
int ch;
|
|
do
|
|
if (!eat_readahead (1))
|
|
break;
|
|
else
|
|
echo_erase ();
|
|
while ((ch = peek_readahead (1)) >= 0 && !isspace (ch));
|
|
continue;
|
|
}
|
|
else if (CCEQ (ti.c_cc[VKILL], c))
|
|
{
|
|
int nchars = eat_readahead (-1);
|
|
if (ti.c_lflag & ECHO)
|
|
while (nchars--)
|
|
echo_erase (1);
|
|
continue;
|
|
}
|
|
else if (CCEQ (ti.c_cc[VREPRINT], c))
|
|
{
|
|
if (ti.c_lflag & ECHO)
|
|
{
|
|
doecho ("\n\r", 2);
|
|
doecho (rabuf, ralen);
|
|
}
|
|
continue;
|
|
}
|
|
else if (CCEQ (ti.c_cc[VEOF], c))
|
|
{
|
|
termios_printf ("EOF");
|
|
accept_input ();
|
|
ret = line_edit_input_done;
|
|
continue;
|
|
}
|
|
else if (CCEQ (ti.c_cc[VEOL], c) ||
|
|
CCEQ (ti.c_cc[VEOL2], c) ||
|
|
c == '\n')
|
|
{
|
|
set_input_done (1);
|
|
termios_printf ("EOL");
|
|
}
|
|
|
|
if (ti.c_iflag & IUCLC && isupper (c))
|
|
c = cyg_tolower (c);
|
|
|
|
put_readahead (c);
|
|
if (ti.c_lflag & ECHO)
|
|
doecho (&c, 1);
|
|
if (!iscanon || input_done)
|
|
{
|
|
int status = accept_input ();
|
|
if (status != 1)
|
|
{
|
|
ret = status ? line_edit_error : line_edit_pipe_full;
|
|
eat_readahead (1);
|
|
break;
|
|
}
|
|
ret = line_edit_input_done;
|
|
input_done = 0;
|
|
}
|
|
}
|
|
|
|
if (!iscanon && ralen > 0)
|
|
ret = line_edit_input_done;
|
|
|
|
if (sawsig)
|
|
ret = line_edit_signalled;
|
|
|
|
return ret;
|
|
}
|
|
|
|
_off64_t
|
|
fhandler_termios::lseek (_off64_t, int)
|
|
{
|
|
set_errno (ESPIPE);
|
|
return -1;
|
|
}
|
|
|
|
void
|
|
fhandler_termios::sigflush ()
|
|
{
|
|
/* FIXME: Checking get_ttyp() for NULL is not right since it should not
|
|
be NULL while this is alive. However, we can conceivably close a
|
|
ctty while exiting and that will zero this. */
|
|
if (get_ttyp () && !(get_ttyp ()->ti.c_lflag & NOFLSH))
|
|
tcflush (TCIFLUSH);
|
|
}
|