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/*
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This file is part of the KDE libraries
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Copyright (C) 1997-2002 The Konsole Developers
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Copyright (C) 2002 Waldo Bastian <bastian@kde.org>
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Copyright (C) 2002-2003 Oswald Buddenhagen <ossi@kde.org>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <config.h>
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#include "kpty.h"
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#include "kprocess.h"
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#ifdef __sgi
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#define __svr4__
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#endif
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#ifdef __osf__
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#define _OSF_SOURCE
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#include <float.h>
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#endif
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#ifdef _AIX
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#define _ALL_SOURCE
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#endif
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// __USE_XOPEN isn't defined by default in ICC
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// (needed for ptsname(), grantpt() and unlockpt())
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#ifdef __INTEL_COMPILER
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# ifndef __USE_XOPEN
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# define __USE_XOPEN
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# endif
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#endif
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#ifdef HAVE_SYS_STROPTS_H
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# include <sys/stropts.h> // Defines I_PUSH
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# define _NEW_TTY_CTRL
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <time.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <grp.h>
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#if defined(HAVE_LIBUTIL_H) && (!defined(__FreeBSD__) || __FreeBSD_version < 900007)
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# include <libutil.h>
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# define USE_LOGIN
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#elif defined(HAVE_UTIL_H)
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# include <util.h>
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# define USE_LOGIN
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#endif
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#ifdef USE_LOGIN
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# include <utmp.h>
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#endif
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#ifdef HAVE_TERMIOS_H
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/* for HP-UX (some versions) the extern C is needed, and for other
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platforms it doesn't hurt */
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extern "C" {
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# include <termios.h>
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}
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#endif
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#if !defined(__osf__)
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# ifdef HAVE_TERMIO_H
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/* needed at least on AIX */
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# include <termio.h>
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# endif
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#endif
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#if defined(HAVE_TCGETATTR)
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# define _tcgetattr(fd, ttmode) tcgetattr(fd, ttmode)
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#elif defined(TIOCGETA)
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# define _tcgetattr(fd, ttmode) ioctl(fd, TIOCGETA, (char *)ttmode)
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#elif defined(TCGETS)
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# define _tcgetattr(fd, ttmode) ioctl(fd, TCGETS, (char *)ttmode)
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#else
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# error
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#endif
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#if defined(HAVE_TCSETATTR) && defined(TCSANOW)
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# define _tcsetattr(fd, ttmode) tcsetattr(fd, TCSANOW, ttmode)
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#elif defined(TIOCSETA)
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# define _tcsetattr(fd, ttmode) ioctl(fd, TIOCSETA, (char *)ttmode)
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#elif defined(TCSETS)
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# define _tcsetattr(fd, ttmode) ioctl(fd, TCSETS, (char *)ttmode)
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#else
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# error
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#endif
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#if defined (_HPUX_SOURCE)
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# define _TERMIOS_INCLUDED
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# include <bsdtty.h>
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#endif
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#if defined(HAVE_PTY_H)
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# include <pty.h>
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#endif
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#include <kdebug.h>
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#include <kstandarddirs.h> // locate
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#ifndef CINTR
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#define CINTR 0x03
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#endif
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#ifndef CQUIT
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#define CQUIT 0x1c
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#endif
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#ifndef CERASE
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#define CERASE 0x7f
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#endif
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#define TTY_GROUP "tty"
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///////////////////////
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// private functions //
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///////////////////////
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#ifdef HAVE_UTEMPTER
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class TDEProcess_Utmp : public TDEProcess
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{
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public:
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int commSetupDoneC()
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{
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dup2(cmdFd, 0);
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dup2(cmdFd, 1);
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dup2(cmdFd, 3);
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return 1;
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}
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int cmdFd;
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};
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#endif
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#define BASE_CHOWN "kgrantpty"
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//////////////////
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// private data //
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//////////////////
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struct KPtyPrivate {
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KPtyPrivate() :
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xonXoff(false),
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utf8(false),
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masterFd(-1), slaveFd(-1)
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{
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memset(&winSize, 0, sizeof(winSize));
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winSize.ws_row = 24;
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winSize.ws_col = 80;
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}
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bool xonXoff : 1;
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bool utf8 : 1;
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int masterFd;
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int slaveFd;
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struct winsize winSize;
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TQCString ttyName;
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};
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/////////////////////////////
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// public member functions //
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/////////////////////////////
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KPty::KPty()
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{
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d = new KPtyPrivate;
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}
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KPty::~KPty()
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{
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close();
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delete d;
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}
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bool KPty::setPty(int pty_master)
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{
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// a pty is already open
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if(d->masterFd >= 0) {
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kdWarning(175) << "KPty::setPty(): " << "d->masterFd >= 0" << endl;
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return false;
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}
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d->masterFd = pty_master;
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return _attachPty(pty_master);
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}
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bool KPty::_attachPty(int pty_master)
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{
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TQCString ptyName;
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kdDebug(175) << "KPty::_attachPty(): " << pty_master << endl;
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#if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
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char *ptsn = ptsname(d->masterFd);
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if (ptsn) {
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grantpt(d->masterFd);
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d->ttyName = ptsn;
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} else {
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::close(d->masterFd);
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d->masterFd = -1;
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}
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#endif
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struct stat st;
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|
|
if (stat(d->ttyName.data(), &st))
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|
|
return false; // this just cannot happen ... *cough* Yeah right, I just
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|
|
// had it happen when pty #349 was allocated. I guess
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|
// there was some sort of leak? I only had a few open.
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|
|
if (((st.st_uid != getuid()) ||
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|
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(st.st_mode & (S_IRGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH))) &&
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|
|
!chownpty(true))
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|
|
{
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|
|
kdWarning(175)
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|
|
<< "KPty::_attachPty(): " << "chownpty failed for device " << ptyName << "::" << d->ttyName << endl
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|
|
<< "KPty::_attachPty(): " << "This means the communication can be eavesdropped." << endl;
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}
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#ifdef BSD
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|
revoke(d->ttyName.data());
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#endif
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#ifdef HAVE_UNLOCKPT
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unlockpt(d->masterFd);
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|
#endif
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|
|
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|
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d->slaveFd = ::open(d->ttyName.data(), O_RDWR | O_NOCTTY);
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|
|
if (d->slaveFd < 0)
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|
|
{
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|
|
kdWarning(175) << "KPty::_attachPty(): " << "Can't open slave pseudo teletype" << endl;
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|
|
::close(d->masterFd);
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|
|
d->masterFd = -1;
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|
return false;
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|
|
}
|
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|
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|
|
|
#if (defined(__svr4__) || defined(__sgi__))
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|
|
// Solaris
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|
|
ioctl(d->slaveFd, I_PUSH, "ptem");
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|
ioctl(d->slaveFd, I_PUSH, "ldterm");
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|
#endif
|
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|
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|
|
// set xon/xoff & control keystrokes
|
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|
|
// without the '::' some version of HP-UX thinks, this declares
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|
|
// the struct in this class, in this method, and fails to find
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|
|
// the correct tc[gs]etattr
|
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|
|
struct ::termios ttmode;
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|
|
|
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|
|
_tcgetattr(d->slaveFd, &ttmode);
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|
|
|
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if (!d->xonXoff)
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|
|
ttmode.c_iflag &= ~(IXOFF | IXON);
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|
else
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|
|
ttmode.c_iflag |= (IXOFF | IXON);
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|
|
|
|
#ifdef IUTF8
|
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|
|
if (!d->utf8)
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|
|
ttmode.c_iflag &= ~IUTF8;
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|
|
else
|
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|
|
ttmode.c_iflag |= IUTF8;
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|
|
#endif
|
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|
|
|
|
|
|
ttmode.c_cc[VINTR] = CINTR;
|
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|
|
ttmode.c_cc[VQUIT] = CQUIT;
|
|
|
|
ttmode.c_cc[VERASE] = CERASE;
|
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|
|
|
|
|
|
_tcsetattr(d->slaveFd, &ttmode);
|
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|
|
|
|
|
|
// set screen size
|
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|
|
ioctl(d->slaveFd, TIOCSWINSZ, (char *)&d->winSize);
|
|
|
|
|
|
|
|
fcntl(d->masterFd, F_SETFD, FD_CLOEXEC);
|
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|
|
fcntl(d->slaveFd, F_SETFD, FD_CLOEXEC);
|
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|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool KPty::open()
|
|
|
|
{
|
|
|
|
if (d->masterFd >= 0)
|
|
|
|
return true;
|
|
|
|
|
|
|
|
#if defined(__OpenBSD__)
|
|
|
|
char cpty[16];
|
|
|
|
|
|
|
|
if (openpty(&d->masterFd, &d->slaveFd, cpty, NULL, &d->winSize) == 0) {
|
|
|
|
d->ttyName = cpty;
|
|
|
|
} else {
|
|
|
|
kdWarning(175) << "Can't open slave pseudo teletype" << endl;
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
|
|
|
|
TQCString ptyName;
|
|
|
|
|
|
|
|
// Find a master pty that we can open ////////////////////////////////
|
|
|
|
|
|
|
|
// Because not all the pty animals are created equal, they want to
|
|
|
|
// be opened by several different methods.
|
|
|
|
|
|
|
|
// We try, as we know them, one by one.
|
|
|
|
|
|
|
|
#if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
|
|
|
|
#ifdef _AIX
|
|
|
|
d->masterFd = ::open("/dev/ptc",O_RDWR);
|
|
|
|
#else
|
|
|
|
d->masterFd = ::open("/dev/ptmx",O_RDWR);
|
|
|
|
#endif
|
|
|
|
if (d->masterFd >= 0)
|
|
|
|
{
|
|
|
|
char *ptsn = ptsname(d->masterFd);
|
|
|
|
if (ptsn) {
|
|
|
|
grantpt(d->masterFd);
|
|
|
|
d->ttyName = ptsn;
|
|
|
|
goto gotpty;
|
|
|
|
} else {
|
|
|
|
::close(d->masterFd);
|
|
|
|
d->masterFd = -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
// Linux device names, FIXME: Trouble on other systems?
|
|
|
|
for (const char* s3 = "pqrstuvwxyzabcdefghijklmno"; *s3; s3++)
|
|
|
|
{
|
|
|
|
for (const char* s4 = "0123456789abcdefghijklmnopqrstuvwxyz"; *s4; s4++)
|
|
|
|
{
|
|
|
|
ptyName.sprintf("/dev/pty%c%c", *s3, *s4);
|
|
|
|
d->ttyName.sprintf("/dev/tty%c%c", *s3, *s4);
|
|
|
|
|
|
|
|
d->masterFd = ::open(ptyName.data(), O_RDWR);
|
|
|
|
if (d->masterFd >= 0)
|
|
|
|
{
|
|
|
|
#ifdef __sun
|
|
|
|
/* Need to check the process group of the pty.
|
|
|
|
* If it exists, then the slave pty is in use,
|
|
|
|
* and we need to get another one.
|
|
|
|
*/
|
|
|
|
int pgrp_rtn;
|
|
|
|
if (ioctl(d->masterFd, TIOCGPGRP, &pgrp_rtn) == 0 || errno != EIO) {
|
|
|
|
::close(d->masterFd);
|
|
|
|
d->masterFd = -1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
#endif /* sun */
|
|
|
|
if (!access(d->ttyName.data(),R_OK|W_OK)) // checks availability based on permission bits
|
|
|
|
{
|
|
|
|
if (!geteuid())
|
|
|
|
{
|
|
|
|
struct group* p = getgrnam(TTY_GROUP);
|
|
|
|
if (!p)
|
|
|
|
p = getgrnam("wheel");
|
|
|
|
gid_t gid = p ? p->gr_gid : getgid ();
|
|
|
|
|
|
|
|
chown(d->ttyName.data(), getuid(), gid);
|
|
|
|
chmod(d->ttyName.data(), S_IRUSR|S_IWUSR|S_IWGRP);
|
|
|
|
}
|
|
|
|
goto gotpty;
|
|
|
|
}
|
|
|
|
::close(d->masterFd);
|
|
|
|
d->masterFd = -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
kdWarning(175) << "KPty::open(): " << "Can't open a pseudo teletype" << endl;
|
|
|
|
return false;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
gotpty:
|
|
|
|
return _attachPty(d->masterFd);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void KPty::close()
|
|
|
|
{
|
|
|
|
if (d->masterFd < 0)
|
|
|
|
return;
|
|
|
|
// don't bother resetting unix98 pty, it will go away after closing master anyway.
|
|
|
|
if (memcmp(d->ttyName.data(), "/dev/pts/", 9)) {
|
|
|
|
if (!geteuid()) {
|
|
|
|
struct stat st;
|
|
|
|
if (!stat(d->ttyName.data(), &st)) {
|
|
|
|
chown(d->ttyName.data(), 0, st.st_gid == getgid() ? 0 : -1);
|
|
|
|
chmod(d->ttyName.data(), S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
fcntl(d->masterFd, F_SETFD, 0);
|
|
|
|
chownpty(false);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
::close(d->slaveFd);
|
|
|
|
::close(d->masterFd);
|
|
|
|
d->masterFd = d->slaveFd = -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
void KPty::setCTty()
|
|
|
|
{
|
|
|
|
// Setup job control //////////////////////////////////
|
|
|
|
|
|
|
|
// Become session leader, process group leader,
|
|
|
|
// and get rid of the old controlling terminal.
|
|
|
|
setsid();
|
|
|
|
|
|
|
|
// make our slave pty the new controlling terminal.
|
|
|
|
#ifdef TIOCSCTTY
|
|
|
|
ioctl(d->slaveFd, TIOCSCTTY, 0);
|
|
|
|
#else
|
|
|
|
// SVR4 hack: the first tty opened after setsid() becomes controlling tty
|
|
|
|
::close(::open(d->ttyName, O_WRONLY, 0));
|
|
|
|
#endif
|
|
|
|
|
|
|
|
// make our new process group the foreground group on the pty
|
|
|
|
int pgrp = getpid();
|
|
|
|
#if defined(_POSIX_VERSION) || defined(__svr4__)
|
|
|
|
tcsetpgrp (d->slaveFd, pgrp);
|
|
|
|
#elif defined(TIOCSPGRP)
|
|
|
|
ioctl(d->slaveFd, TIOCSPGRP, (char *)&pgrp);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
void KPty::login(const char *user, const char *remotehost)
|
|
|
|
{
|
|
|
|
#ifdef HAVE_UTEMPTER
|
|
|
|
TDEProcess_Utmp utmp;
|
|
|
|
utmp.cmdFd = d->masterFd;
|
|
|
|
utmp << "/usr/lib/utempter/utempter" << "add";
|
|
|
|
if (remotehost)
|
|
|
|
utmp << remotehost;
|
|
|
|
utmp.start(TDEProcess::Block);
|
|
|
|
Q_UNUSED(user);
|
|
|
|
Q_UNUSED(remotehost);
|
|
|
|
#elif defined(USE_LOGIN)
|
|
|
|
const char *str_ptr;
|
|
|
|
struct utmp l_struct;
|
|
|
|
memset(&l_struct, 0, sizeof(struct utmp));
|
|
|
|
// note: strncpy without terminators _is_ correct here. man 4 utmp
|
|
|
|
|
|
|
|
if (user)
|
|
|
|
strncpy(l_struct.ut_name, user, UT_NAMESIZE);
|
|
|
|
|
|
|
|
if (remotehost)
|
|
|
|
strncpy(l_struct.ut_host, remotehost, UT_HOSTSIZE);
|
|
|
|
|
|
|
|
# ifndef __GLIBC__
|
|
|
|
str_ptr = d->ttyName.data();
|
|
|
|
if (!memcmp(str_ptr, "/dev/", 5))
|
|
|
|
str_ptr += 5;
|
|
|
|
strncpy(l_struct.ut_line, str_ptr, UT_LINESIZE);
|
|
|
|
# endif
|
|
|
|
|
|
|
|
// Handle 64-bit time_t properly, where it may be larger
|
|
|
|
// than the integral type of ut_time.
|
|
|
|
{
|
|
|
|
time_t ut_time_temp;
|
|
|
|
time(&ut_time_temp);
|
|
|
|
l_struct.ut_time=ut_time_temp;
|
|
|
|
}
|
|
|
|
|
|
|
|
::login(&l_struct);
|
|
|
|
#else
|
|
|
|
Q_UNUSED(user);
|
|
|
|
Q_UNUSED(remotehost);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
void KPty::logout()
|
|
|
|
{
|
|
|
|
#ifdef HAVE_UTEMPTER
|
|
|
|
TDEProcess_Utmp utmp;
|
|
|
|
utmp.cmdFd = d->masterFd;
|
|
|
|
utmp << "/usr/lib/utempter/utempter" << "del";
|
|
|
|
utmp.start(TDEProcess::Block);
|
|
|
|
#elif defined(USE_LOGIN)
|
|
|
|
const char *str_ptr = d->ttyName.data();
|
|
|
|
if (!memcmp(str_ptr, "/dev/", 5))
|
|
|
|
str_ptr += 5;
|
|
|
|
# ifdef __GLIBC__
|
|
|
|
else {
|
|
|
|
const char *sl_ptr = strrchr(str_ptr, '/');
|
|
|
|
if (sl_ptr)
|
|
|
|
str_ptr = sl_ptr + 1;
|
|
|
|
}
|
|
|
|
# endif
|
|
|
|
::logout(str_ptr);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
void KPty::setWinSize(int lines, int columns)
|
|
|
|
{
|
|
|
|
d->winSize.ws_row = (unsigned short)lines;
|
|
|
|
d->winSize.ws_col = (unsigned short)columns;
|
|
|
|
if (d->masterFd >= 0)
|
|
|
|
ioctl( d->masterFd, TIOCSWINSZ, (char *)&d->winSize );
|
|
|
|
}
|
|
|
|
|
|
|
|
void KPty::setXonXoff(bool useXonXoff)
|
|
|
|
{
|
|
|
|
d->xonXoff = useXonXoff;
|
|
|
|
if (d->masterFd >= 0) {
|
|
|
|
// without the '::' some version of HP-UX thinks, this declares
|
|
|
|
// the struct in this class, in this method, and fails to find
|
|
|
|
// the correct tc[gs]etattr
|
|
|
|
struct ::termios ttmode;
|
|
|
|
|
|
|
|
_tcgetattr(d->masterFd, &ttmode);
|
|
|
|
|
|
|
|
if (!useXonXoff)
|
|
|
|
ttmode.c_iflag &= ~(IXOFF | IXON);
|
|
|
|
else
|
|
|
|
ttmode.c_iflag |= (IXOFF | IXON);
|
|
|
|
|
|
|
|
_tcsetattr(d->masterFd, &ttmode);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void KPty::setUtf8Mode(bool useUtf8)
|
|
|
|
{
|
|
|
|
d->utf8 = useUtf8;
|
|
|
|
#ifdef IUTF8
|
|
|
|
if (d->masterFd >= 0) {
|
|
|
|
// without the '::' some version of HP-UX thinks, this declares
|
|
|
|
// the struct in this class, in this method, and fails to find
|
|
|
|
// the correct tc[gs]etattr
|
|
|
|
struct ::termios ttmode;
|
|
|
|
|
|
|
|
_tcgetattr(d->masterFd, &ttmode);
|
|
|
|
|
|
|
|
if (!useUtf8)
|
|
|
|
ttmode.c_iflag &= ~IUTF8;
|
|
|
|
else
|
|
|
|
ttmode.c_iflag |= IUTF8;
|
|
|
|
|
|
|
|
_tcsetattr(d->masterFd, &ttmode);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
const char *KPty::ttyName() const
|
|
|
|
{
|
|
|
|
return d->ttyName.data();
|
|
|
|
}
|
|
|
|
|
|
|
|
int KPty::masterFd() const
|
|
|
|
{
|
|
|
|
return d->masterFd;
|
|
|
|
}
|
|
|
|
|
|
|
|
int KPty::slaveFd() const
|
|
|
|
{
|
|
|
|
return d->slaveFd;
|
|
|
|
}
|
|
|
|
|
|
|
|
// private
|
|
|
|
bool KPty::chownpty(bool grant)
|
|
|
|
{
|
|
|
|
#if !defined(__OpenBSD__)
|
|
|
|
TDEProcess proc;
|
|
|
|
proc << locate("exe", BASE_CHOWN) << (grant?"--grant":"--revoke") << TQString::number(d->masterFd);
|
|
|
|
return proc.start(TDEProcess::Block) && proc.normalExit() && !proc.exitStatus();
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|