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-rw-r--r--tdecore/kpty.cpp579
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diff --git a/tdecore/kpty.cpp b/tdecore/kpty.cpp
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+++ b/tdecore/kpty.cpp
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+/*
+
+ This file is part of the KDE libraries
+ Copyright (C) 1997-2002 The Konsole Developers
+ Copyright (C) 2002 Waldo Bastian <bastian@kde.org>
+ Copyright (C) 2002-2003 Oswald Buddenhagen <ossi@kde.org>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public License
+ along with this library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+#include <config.h>
+
+#include "kpty.h"
+#include "kprocess.h"
+
+#ifdef __sgi
+#define __svr4__
+#endif
+
+#ifdef __osf__
+#define _OSF_SOURCE
+#include <float.h>
+#endif
+
+#ifdef _AIX
+#define _ALL_SOURCE
+#endif
+
+// __USE_XOPEN isn't defined by default in ICC
+// (needed for ptsname(), grantpt() and unlockpt())
+#ifdef __INTEL_COMPILER
+# ifndef __USE_XOPEN
+# define __USE_XOPEN
+# endif
+#endif
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+
+#ifdef HAVE_SYS_STROPTS_H
+# include <sys/stropts.h> // Defines I_PUSH
+# define _NEW_TTY_CTRL
+#endif
+
+#include <errno.h>
+#include <fcntl.h>
+#include <time.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <grp.h>
+
+#ifdef HAVE_LIBUTIL_H
+# include <libutil.h>
+# define USE_LOGIN
+#elif defined(HAVE_UTIL_H)
+# include <util.h>
+# define USE_LOGIN
+#endif
+
+#ifdef USE_LOGIN
+# include <utmp.h>
+#endif
+
+#ifdef HAVE_TERMIOS_H
+/* for HP-UX (some versions) the extern C is needed, and for other
+ platforms it doesn't hurt */
+extern "C" {
+# include <termios.h>
+}
+#endif
+
+#if !defined(__osf__)
+# ifdef HAVE_TERMIO_H
+/* needed at least on AIX */
+# include <termio.h>
+# endif
+#endif
+
+#if defined(HAVE_TCGETATTR)
+# define _tcgetattr(fd, ttmode) tcgetattr(fd, ttmode)
+#elif defined(TIOCGETA)
+# define _tcgetattr(fd, ttmode) ioctl(fd, TIOCGETA, (char *)ttmode)
+#elif defined(TCGETS)
+# define _tcgetattr(fd, ttmode) ioctl(fd, TCGETS, (char *)ttmode)
+#else
+# error
+#endif
+
+#if defined(HAVE_TCSETATTR) && defined(TCSANOW)
+# define _tcsetattr(fd, ttmode) tcsetattr(fd, TCSANOW, ttmode)
+#elif defined(TIOCSETA)
+# define _tcsetattr(fd, ttmode) ioctl(fd, TIOCSETA, (char *)ttmode)
+#elif defined(TCSETS)
+# define _tcsetattr(fd, ttmode) ioctl(fd, TCSETS, (char *)ttmode)
+#else
+# error
+#endif
+
+#if defined (_HPUX_SOURCE)
+# define _TERMIOS_INCLUDED
+# include <bsdtty.h>
+#endif
+
+#if defined(HAVE_PTY_H)
+# include <pty.h>
+#endif
+
+#include <kdebug.h>
+#include <kstandarddirs.h> // locate
+
+#ifndef CINTR
+#define CINTR 0x03
+#endif
+#ifndef CQUIT
+#define CQUIT 0x1c
+#endif
+#ifndef CERASE
+#define CERASE 0x7f
+#endif
+
+#define TTY_GROUP "tty"
+
+///////////////////////
+// private functions //
+///////////////////////
+
+#ifdef HAVE_UTEMPTER
+class KProcess_Utmp : public KProcess
+{
+public:
+ int commSetupDoneC()
+ {
+ dup2(cmdFd, 0);
+ dup2(cmdFd, 1);
+ dup2(cmdFd, 3);
+ return 1;
+ }
+ int cmdFd;
+};
+#endif
+
+#define BASE_CHOWN "kgrantpty"
+
+
+
+//////////////////
+// private data //
+//////////////////
+
+struct KPtyPrivate {
+ KPtyPrivate() :
+ xonXoff(false),
+ utf8(false),
+ masterFd(-1), slaveFd(-1)
+ {
+ memset(&winSize, 0, sizeof(winSize));
+ winSize.ws_row = 24;
+ winSize.ws_col = 80;
+ }
+
+ bool xonXoff : 1;
+ bool utf8 : 1;
+ int masterFd;
+ int slaveFd;
+ struct winsize winSize;
+
+ TQCString ttyName;
+};
+
+/////////////////////////////
+// public member functions //
+/////////////////////////////
+
+KPty::KPty()
+{
+ d = new KPtyPrivate;
+}
+
+KPty::~KPty()
+{
+ close();
+ delete d;
+}
+
+bool KPty::setPty(int pty_master)
+{
+ kdWarning(175)
+ << "setPty()" << endl;
+ // a pty is already open
+ if(d->masterFd >= 0) {
+ kdWarning(175)
+ << "d->masterFd >= 0" << endl;
+ return false;
+ }
+ d->masterFd = pty_master;
+ return _attachPty(pty_master);
+}
+
+bool KPty::_attachPty(int pty_master)
+{
+ TQCString ptyName;
+
+ kdWarning(175)
+ << "_attachPty() " << pty_master << endl;
+#if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
+ char *ptsn = ptsname(d->masterFd);
+ if (ptsn) {
+ grantpt(d->masterFd);
+ d->ttyName = ptsn;
+ } else {
+ ::close(d->masterFd);
+ d->masterFd = -1;
+ }
+#endif
+
+ struct stat st;
+ if (stat(d->ttyName.data(), &st))
+ return false; // this just cannot happen ... *cough* Yeah right, I just
+ // had it happen when pty #349 was allocated. I guess
+ // there was some sort of leak? I only had a few open.
+ if (((st.st_uid != getuid()) ||
+ (st.st_mode & (S_IRGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH))) &&
+ !chownpty(true))
+ {
+ kdWarning(175)
+ << "chownpty failed for device " << ptyName << "::" << d->ttyName
+ << "\nThis means the communication can be eavesdropped." << endl;
+ }
+
+#ifdef BSD
+ revoke(d->ttyName.data());
+#endif
+
+#ifdef HAVE_UNLOCKPT
+ unlockpt(d->masterFd);
+#endif
+
+ d->slaveFd = ::open(d->ttyName.data(), O_RDWR | O_NOCTTY);
+ if (d->slaveFd < 0)
+ {
+ kdWarning(175) << "Can't open slave pseudo teletype" << endl;
+ ::close(d->masterFd);
+ d->masterFd = -1;
+ return false;
+ }
+
+#if (defined(__svr4__) || defined(__sgi__))
+ // Solaris
+ ioctl(d->slaveFd, I_PUSH, "ptem");
+ ioctl(d->slaveFd, I_PUSH, "ldterm");
+#endif
+
+ // set xon/xoff & control keystrokes
+ // 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->slaveFd, &ttmode);
+
+ if (!d->xonXoff)
+ ttmode.c_iflag &= ~(IXOFF | IXON);
+ else
+ ttmode.c_iflag |= (IXOFF | IXON);
+
+#ifdef IUTF8
+ if (!d->utf8)
+ ttmode.c_iflag &= ~IUTF8;
+ else
+ ttmode.c_iflag |= IUTF8;
+#endif
+
+ ttmode.c_cc[VINTR] = CINTR;
+ ttmode.c_cc[VQUIT] = CQUIT;
+ ttmode.c_cc[VERASE] = CERASE;
+
+ _tcsetattr(d->slaveFd, &ttmode);
+
+ // set screen size
+ ioctl(d->slaveFd, TIOCSWINSZ, (char *)&d->winSize);
+
+ fcntl(d->masterFd, F_SETFD, FD_CLOEXEC);
+ fcntl(d->slaveFd, F_SETFD, FD_CLOEXEC);
+
+ return true;
+}
+
+bool KPty::open()
+{
+ if (d->masterFd >= 0)
+ return true;
+
+ 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) << "Can't open a pseudo teletype" << endl;
+ return false;
+
+ 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
+ KProcess_Utmp utmp;
+ utmp.cmdFd = d->masterFd;
+ utmp << "/usr/lib/utempter/utempter" << "add";
+ if (remotehost)
+ utmp << remotehost;
+ utmp.start(KProcess::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
+ KProcess_Utmp utmp;
+ utmp.cmdFd = d->masterFd;
+ utmp << "/usr/lib/utempter/utempter" << "del";
+ utmp.start(KProcess::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)
+{
+ KProcess proc;
+ proc << locate("exe", BASE_CHOWN) << (grant?"--grant":"--revoke") << TQString::number(d->masterFd);
+ return proc.start(KProcess::Block) && proc.normalExit() && !proc.exitStatus();
+}
+