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00024 #include <config.h>
00025
00026 #include "kpty.h"
00027 #include "kprocess.h"
00028
00029 #ifdef __sgi
00030 #define __svr4__
00031 #endif
00032
00033 #ifdef __osf__
00034 #define _OSF_SOURCE
00035 #include <float.h>
00036 #endif
00037
00038 #ifdef _AIX
00039 #define _ALL_SOURCE
00040 #endif
00041
00042
00043
00044 #ifdef __INTEL_COMPILER
00045 # ifndef __USE_XOPEN
00046 # define __USE_XOPEN
00047 # endif
00048 #endif
00049
00050 #include <sys/types.h>
00051 #include <sys/ioctl.h>
00052 #include <sys/time.h>
00053 #include <sys/resource.h>
00054 #include <sys/stat.h>
00055 #include <sys/param.h>
00056
00057 #ifdef HAVE_SYS_STROPTS_H
00058 # include <sys/stropts.h>
00059 # define _NEW_TTY_CTRL
00060 #endif
00061
00062 #include <errno.h>
00063 #include <fcntl.h>
00064 #include <time.h>
00065 #include <stdlib.h>
00066 #include <stdio.h>
00067 #include <string.h>
00068 #include <unistd.h>
00069 #include <grp.h>
00070
00071 #ifdef HAVE_LIBUTIL_H
00072 # include <libutil.h>
00073 # define USE_LOGIN
00074 #elif defined(HAVE_UTIL_H)
00075 # include <util.h>
00076 # define USE_LOGIN
00077 #endif
00078
00079 #ifdef USE_LOGIN
00080 # include <utmp.h>
00081 #endif
00082
00083 #ifdef HAVE_TERMIOS_H
00084
00085
00086 extern "C" {
00087 # include <termios.h>
00088 }
00089 #endif
00090
00091 #if !defined(__osf__)
00092 # ifdef HAVE_TERMIO_H
00093
00094 # include <termio.h>
00095 # endif
00096 #endif
00097
00098 #if defined (__FreeBSD__) || defined (__NetBSD__) || defined (__OpenBSD__) || defined (__bsdi__) || defined(__APPLE__)
00099 # define _tcgetattr(fd, ttmode) ioctl(fd, TIOCGETA, (char *)ttmode)
00100 #else
00101 # if defined(_HPUX_SOURCE) || defined(__Lynx__)
00102 # define _tcgetattr(fd, ttmode) tcgetattr(fd, ttmode)
00103 # else
00104 # define _tcgetattr(fd, ttmode) ioctl(fd, TCGETS, (char *)ttmode)
00105 # endif
00106 #endif
00107
00108 #if defined (__FreeBSD__) || defined (__NetBSD__) || defined (__OpenBSD__) || defined (__bsdi__) || defined(__APPLE__)
00109 # define _tcsetattr(fd, ttmode) ioctl(fd, TIOCSETA, (char *)ttmode)
00110 #else
00111 # ifdef _HPUX_SOURCE
00112 # define _tcsetattr(fd, ttmode) tcsetattr(fd, TCSANOW, ttmode)
00113 # else
00114 # define _tcsetattr(fd, ttmode) ioctl(fd, TCSETS, (char *)ttmode)
00115 # endif
00116 #endif
00117
00118 #if defined (_HPUX_SOURCE)
00119 # define _TERMIOS_INCLUDED
00120 # include <bsdtty.h>
00121 #endif
00122
00123 #if defined(HAVE_PTY_H)
00124 # include <pty.h>
00125 #endif
00126
00127 #include <kdebug.h>
00128 #include <kstandarddirs.h>
00129
00130
00131 #ifndef CTRL
00132 # define CTRL(x) ((x) & 037)
00133 #endif
00134
00135 #define TTY_GROUP "tty"
00136
00138
00140
00141 #ifdef HAVE_UTEMPTER
00142 class KProcess_Utmp : public KProcess
00143 {
00144 public:
00145 int commSetupDoneC()
00146 {
00147 dup2(cmdFd, 0);
00148 dup2(cmdFd, 1);
00149 dup2(cmdFd, 3);
00150 return 1;
00151 }
00152 int cmdFd;
00153 };
00154 #endif
00155
00156 #define BASE_CHOWN "kgrantpty"
00157
00158
00159
00161
00163
00164 struct KPtyPrivate {
00165 KPtyPrivate() :
00166 xonXoff(false),
00167 masterFd(-1), slaveFd(-1)
00168 {
00169 memset(&winSize, 0, sizeof(winSize));
00170 winSize.ws_row = 24;
00171 winSize.ws_col = 80;
00172 }
00173
00174 bool xonXoff : 1;
00175 int masterFd;
00176 int slaveFd;
00177 struct winsize winSize;
00178
00179 QCString ttyName;
00180 };
00181
00183
00185
00186 KPty::KPty()
00187 {
00188 d = new KPtyPrivate;
00189 }
00190
00191 KPty::~KPty()
00192 {
00193 close();
00194 delete d;
00195 }
00196
00197 bool KPty::open()
00198 {
00199 if (d->masterFd >= 0)
00200 return true;
00201
00202 QCString ptyName;
00203
00204
00205
00206
00207
00208
00209
00210
00211 #if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
00212 #ifdef _AIX
00213 d->masterFd = ::open("/dev/ptc",O_RDWR);
00214 #else
00215 d->masterFd = ::open("/dev/ptmx",O_RDWR);
00216 #endif
00217 if (d->masterFd >= 0)
00218 {
00219 char *ptsn = ptsname(d->masterFd);
00220 if (ptsn) {
00221 grantpt(d->masterFd);
00222 d->ttyName = ptsn;
00223 goto gotpty;
00224 } else {
00225 ::close(d->masterFd);
00226 d->masterFd = -1;
00227 }
00228 }
00229 #endif
00230
00231
00232 for (const char* s3 = "pqrstuvwxyzabcdefghijklmno"; *s3; s3++)
00233 {
00234 for (const char* s4 = "0123456789abcdefghijklmnopqrstuvwxyz"; *s4; s4++)
00235 {
00236 ptyName.sprintf("/dev/pty%c%c", *s3, *s4);
00237 d->ttyName.sprintf("/dev/tty%c%c", *s3, *s4);
00238
00239 d->masterFd = ::open(ptyName.data(), O_RDWR);
00240 if (d->masterFd >= 0)
00241 {
00242 #ifdef __sun
00243
00244
00245
00246
00247 int pgrp_rtn;
00248 if (ioctl(d->masterFd, TIOCGPGRP, &pgrp_rtn) == 0 || errno != EIO) {
00249 ::close(d->masterFd);
00250 d->masterFd = -1;
00251 continue;
00252 }
00253 #endif
00254 if (!access(d->ttyName.data(),R_OK|W_OK))
00255 {
00256 if (!geteuid())
00257 {
00258 struct group* p = getgrnam(TTY_GROUP);
00259 if (!p)
00260 p = getgrnam("wheel");
00261 gid_t gid = p ? p->gr_gid : getgid ();
00262
00263 chown(d->ttyName.data(), getuid(), gid);
00264 chmod(d->ttyName.data(), S_IRUSR|S_IWUSR|S_IWGRP);
00265 }
00266 goto gotpty;
00267 }
00268 ::close(d->masterFd);
00269 d->masterFd = -1;
00270 }
00271 }
00272 }
00273
00274 kdWarning(175) << "Can't open a pseudo teletype" << endl;
00275 return false;
00276
00277 gotpty:
00278 struct stat st;
00279 if (stat(d->ttyName.data(), &st))
00280 return false;
00281 if (((st.st_uid != getuid()) ||
00282 (st.st_mode & (S_IRGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH))) &&
00283 !chownpty(true))
00284 {
00285 kdWarning(175)
00286 << "chownpty failed for device " << ptyName << "::" << d->ttyName
00287 << "\nThis means the communication can be eavesdropped." << endl;
00288 }
00289
00290 #ifdef BSD
00291 revoke(d->ttyName.data());
00292 #endif
00293
00294 #ifdef HAVE_UNLOCKPT
00295 unlockpt(d->masterFd);
00296 #endif
00297
00298 d->slaveFd = ::open(d->ttyName.data(), O_RDWR | O_NOCTTY);
00299 if (d->slaveFd < 0)
00300 {
00301 kdWarning(175) << "Can't open slave pseudo teletype" << endl;
00302 ::close(d->masterFd);
00303 d->masterFd = -1;
00304 return false;
00305 }
00306
00307 #if (defined(__svr4__) || defined(__sgi__))
00308
00309 ioctl(d->slaveFd, I_PUSH, "ptem");
00310 ioctl(d->slaveFd, I_PUSH, "ldterm");
00311 #endif
00312
00313
00314
00315
00316
00317 struct ::termios ttmode;
00318
00319 _tcgetattr(d->slaveFd, &ttmode);
00320
00321 if (!d->xonXoff)
00322 ttmode.c_iflag &= ~(IXOFF | IXON);
00323 else
00324 ttmode.c_iflag |= (IXOFF | IXON);
00325
00326 ttmode.c_cc[VINTR] = CTRL('C' - '@');
00327 ttmode.c_cc[VQUIT] = CTRL('\\' - '@');
00328 ttmode.c_cc[VERASE] = 0177;
00329
00330 _tcsetattr(d->slaveFd, &ttmode);
00331
00332
00333 ioctl(d->slaveFd, TIOCSWINSZ, (char *)&d->winSize);
00334
00335 fcntl(d->masterFd, F_SETFD, FD_CLOEXEC);
00336 fcntl(d->slaveFd, F_SETFD, FD_CLOEXEC);
00337
00338 return true;
00339 }
00340
00341 void KPty::close()
00342 {
00343 if (d->masterFd < 0)
00344 return;
00345
00346 if (memcmp(d->ttyName.data(), "/dev/pts/", 9)) {
00347 if (!geteuid()) {
00348 struct stat st;
00349 if (!stat(d->ttyName.data(), &st)) {
00350 chown(d->ttyName.data(), 0, st.st_gid == getgid() ? 0 : -1);
00351 chmod(d->ttyName.data(), S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
00352 }
00353 } else {
00354 fcntl(d->masterFd, F_SETFD, 0);
00355 chownpty(false);
00356 }
00357 }
00358 ::close(d->slaveFd);
00359 ::close(d->masterFd);
00360 d->masterFd = d->slaveFd = -1;
00361 }
00362
00363 void KPty::setCTty()
00364 {
00365
00366
00367
00368
00369 setsid();
00370
00371
00372 #ifdef TIOCSCTTY
00373 ioctl(d->slaveFd, TIOCSCTTY, 0);
00374 #else
00375
00376 ::close(::open(d->ttyName, O_WRONLY, 0));
00377 #endif
00378
00379
00380 int pgrp = getpid();
00381 #if defined(_POSIX_VERSION) || defined(__svr4__)
00382 tcsetpgrp (d->slaveFd, pgrp);
00383 #elif defined(TIOCSPGRP)
00384 ioctl(d->slaveFd, TIOCSPGRP, (char *)&pgrp);
00385 #endif
00386 }
00387
00388 void KPty::login(const char *user, const char *remotehost)
00389 {
00390 #ifdef HAVE_UTEMPTER
00391 KProcess_Utmp utmp;
00392 utmp.cmdFd = d->masterFd;
00393 utmp << "/usr/sbin/utempter" << "-a" << d->ttyName << "";
00394 utmp.start(KProcess::Block);
00395 Q_UNUSED(user);
00396 Q_UNUSED(remotehost);
00397 #elif defined(USE_LOGIN)
00398 const char *str_ptr;
00399 struct utmp l_struct;
00400 memset(&l_struct, 0, sizeof(struct utmp));
00401
00402
00403 if (user)
00404 strncpy(l_struct.ut_name, user, UT_NAMESIZE);
00405
00406 if (remotehost)
00407 strncpy(l_struct.ut_host, remotehost, UT_HOSTSIZE);
00408
00409 # ifndef __GLIBC__
00410 str_ptr = d->ttyName.data();
00411 if (!memcmp(str_ptr, "/dev/", 5))
00412 str_ptr += 5;
00413 strncpy(l_struct.ut_line, str_ptr, UT_LINESIZE);
00414 # endif
00415
00416
00417
00418 {
00419 time_t ut_time_temp;
00420 time(&ut_time_temp);
00421 l_struct.ut_time=ut_time_temp;
00422 }
00423
00424 ::login(&l_struct);
00425 #else
00426 Q_UNUSED(user);
00427 Q_UNUSED(remotehost);
00428 #endif
00429 }
00430
00431 void KPty::logout()
00432 {
00433 #ifdef HAVE_UTEMPTER
00434 KProcess_Utmp utmp;
00435 utmp.cmdFd = d->masterFd;
00436 utmp << "/usr/sbin/utempter" << "-d" << d->ttyName;
00437 utmp.start(KProcess::Block);
00438 #elif defined(USE_LOGIN)
00439 const char *str_ptr = d->ttyName.data();
00440 if (!memcmp(str_ptr, "/dev/", 5))
00441 str_ptr += 5;
00442 # ifdef __GLIBC__
00443 else {
00444 const char *sl_ptr = strrchr(str_ptr, '/');
00445 if (sl_ptr)
00446 str_ptr = sl_ptr + 1;
00447 }
00448 # endif
00449 ::logout(str_ptr);
00450 #endif
00451 }
00452
00453 void KPty::setWinSize(int lines, int columns)
00454 {
00455 d->winSize.ws_row = (unsigned short)lines;
00456 d->winSize.ws_col = (unsigned short)columns;
00457 if (d->masterFd >= 0)
00458 ioctl( d->masterFd, TIOCSWINSZ, (char *)&d->winSize );
00459 }
00460
00461 void KPty::setXonXoff(bool useXonXoff)
00462 {
00463 d->xonXoff = useXonXoff;
00464 if (d->masterFd >= 0) {
00465
00466
00467
00468 struct ::termios ttmode;
00469
00470 _tcgetattr(d->masterFd, &ttmode);
00471
00472 if (!useXonXoff)
00473 ttmode.c_iflag &= ~(IXOFF | IXON);
00474 else
00475 ttmode.c_iflag |= (IXOFF | IXON);
00476
00477 _tcsetattr(d->masterFd, &ttmode);
00478 }
00479 }
00480
00481 const char *KPty::ttyName() const
00482 {
00483 return d->ttyName.data();
00484 }
00485
00486 int KPty::masterFd() const
00487 {
00488 return d->masterFd;
00489 }
00490
00491 int KPty::slaveFd() const
00492 {
00493 return d->slaveFd;
00494 }
00495
00496
00497 bool KPty::chownpty(bool grant)
00498 {
00499 KProcess proc;
00500 proc << locate("exe", BASE_CHOWN) << (grant?"--grant":"--revoke") << QString::number(d->masterFd);
00501 return proc.start(KProcess::Block) && proc.normalExit() && !proc.exitStatus();
00502 }
00503