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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(HAVE_TCGETATTR)
00099 # define _tcgetattr(fd, ttmode) tcgetattr(fd, ttmode)
00100 #elif defined(TIOCGETA)
00101 # define _tcgetattr(fd, ttmode) ioctl(fd, TIOCGETA, (char *)ttmode)
00102 #elif defined(TCGETS)
00103 # define _tcgetattr(fd, ttmode) ioctl(fd, TCGETS, (char *)ttmode)
00104 #else
00105 # error
00106 #endif
00107
00108 #if defined(HAVE_TCSETATTR) && defined(TCSANOW)
00109 # define _tcsetattr(fd, ttmode) tcsetattr(fd, TCSANOW, ttmode)
00110 #elif defined(TIOCSETA)
00111 # define _tcsetattr(fd, ttmode) ioctl(fd, TIOCSETA, (char *)ttmode)
00112 #elif defined(TCSETS)
00113 # define _tcsetattr(fd, ttmode) ioctl(fd, TCSETS, (char *)ttmode)
00114 #else
00115 # error
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 utf8(false),
00168 masterFd(-1), slaveFd(-1)
00169 {
00170 memset(&winSize, 0, sizeof(winSize));
00171 winSize.ws_row = 24;
00172 winSize.ws_col = 80;
00173 }
00174
00175 bool xonXoff : 1;
00176 bool utf8 : 1;
00177 int masterFd;
00178 int slaveFd;
00179 struct winsize winSize;
00180
00181 QCString ttyName;
00182 };
00183
00185
00187
00188 KPty::KPty()
00189 {
00190 d = new KPtyPrivate;
00191 }
00192
00193 KPty::~KPty()
00194 {
00195 close();
00196 delete d;
00197 }
00198
00199 bool KPty::setPty(int pty_master)
00200 {
00201 kdWarning(175)
00202 << "setPty()" << endl;
00203
00204 if(d->masterFd >= 0) {
00205 kdWarning(175)
00206 << "d->masterFd >= 0" << endl;
00207 return false;
00208 }
00209 d->masterFd = pty_master;
00210 return _attachPty(pty_master);
00211 }
00212
00213 bool KPty::_attachPty(int pty_master)
00214 {
00215 QCString ptyName;
00216
00217 kdWarning(175)
00218 << "_attachPty() " << pty_master << endl;
00219 #if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
00220 char *ptsn = ptsname(d->masterFd);
00221 if (ptsn) {
00222 grantpt(d->masterFd);
00223 d->ttyName = ptsn;
00224 } else {
00225 ::close(d->masterFd);
00226 d->masterFd = -1;
00227 }
00228 #endif
00229
00230 struct stat st;
00231 if (stat(d->ttyName.data(), &st))
00232 return false;
00233
00234
00235 if (((st.st_uid != getuid()) ||
00236 (st.st_mode & (S_IRGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH))) &&
00237 !chownpty(true))
00238 {
00239 kdWarning(175)
00240 << "chownpty failed for device " << ptyName << "::" << d->ttyName
00241 << "\nThis means the communication can be eavesdropped." << endl;
00242 }
00243
00244 #ifdef BSD
00245 revoke(d->ttyName.data());
00246 #endif
00247
00248 #ifdef HAVE_UNLOCKPT
00249 unlockpt(d->masterFd);
00250 #endif
00251
00252 d->slaveFd = ::open(d->ttyName.data(), O_RDWR | O_NOCTTY);
00253 if (d->slaveFd < 0)
00254 {
00255 kdWarning(175) << "Can't open slave pseudo teletype" << endl;
00256 ::close(d->masterFd);
00257 d->masterFd = -1;
00258 return false;
00259 }
00260
00261 #if (defined(__svr4__) || defined(__sgi__))
00262
00263 ioctl(d->slaveFd, I_PUSH, "ptem");
00264 ioctl(d->slaveFd, I_PUSH, "ldterm");
00265 #endif
00266
00267
00268
00269
00270
00271 struct ::termios ttmode;
00272
00273 _tcgetattr(d->slaveFd, &ttmode);
00274
00275 if (!d->xonXoff)
00276 ttmode.c_iflag &= ~(IXOFF | IXON);
00277 else
00278 ttmode.c_iflag |= (IXOFF | IXON);
00279
00280 #ifdef IUTF8
00281 if (!d->utf8)
00282 ttmode.c_iflag &= ~IUTF8;
00283 else
00284 ttmode.c_iflag |= IUTF8;
00285 #endif
00286
00287 ttmode.c_cc[VINTR] = CTRL('C' - '@');
00288 ttmode.c_cc[VQUIT] = CTRL('\\' - '@');
00289 ttmode.c_cc[VERASE] = 0177;
00290
00291 _tcsetattr(d->slaveFd, &ttmode);
00292
00293
00294 ioctl(d->slaveFd, TIOCSWINSZ, (char *)&d->winSize);
00295
00296 fcntl(d->masterFd, F_SETFD, FD_CLOEXEC);
00297 fcntl(d->slaveFd, F_SETFD, FD_CLOEXEC);
00298
00299 return true;
00300 }
00301
00302 bool KPty::open()
00303 {
00304 if (d->masterFd >= 0)
00305 return true;
00306
00307 QCString ptyName;
00308
00309
00310
00311
00312
00313
00314
00315
00316 #if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
00317 #ifdef _AIX
00318 d->masterFd = ::open("/dev/ptc",O_RDWR);
00319 #else
00320 d->masterFd = ::open("/dev/ptmx",O_RDWR);
00321 #endif
00322 if (d->masterFd >= 0)
00323 {
00324 char *ptsn = ptsname(d->masterFd);
00325 if (ptsn) {
00326 grantpt(d->masterFd);
00327 d->ttyName = ptsn;
00328 goto gotpty;
00329 } else {
00330 ::close(d->masterFd);
00331 d->masterFd = -1;
00332 }
00333 }
00334 #endif
00335
00336
00337 for (const char* s3 = "pqrstuvwxyzabcdefghijklmno"; *s3; s3++)
00338 {
00339 for (const char* s4 = "0123456789abcdefghijklmnopqrstuvwxyz"; *s4; s4++)
00340 {
00341 ptyName.sprintf("/dev/pty%c%c", *s3, *s4);
00342 d->ttyName.sprintf("/dev/tty%c%c", *s3, *s4);
00343
00344 d->masterFd = ::open(ptyName.data(), O_RDWR);
00345 if (d->masterFd >= 0)
00346 {
00347 #ifdef __sun
00348
00349
00350
00351
00352 int pgrp_rtn;
00353 if (ioctl(d->masterFd, TIOCGPGRP, &pgrp_rtn) == 0 || errno != EIO) {
00354 ::close(d->masterFd);
00355 d->masterFd = -1;
00356 continue;
00357 }
00358 #endif
00359 if (!access(d->ttyName.data(),R_OK|W_OK))
00360 {
00361 if (!geteuid())
00362 {
00363 struct group* p = getgrnam(TTY_GROUP);
00364 if (!p)
00365 p = getgrnam("wheel");
00366 gid_t gid = p ? p->gr_gid : getgid ();
00367
00368 chown(d->ttyName.data(), getuid(), gid);
00369 chmod(d->ttyName.data(), S_IRUSR|S_IWUSR|S_IWGRP);
00370 }
00371 goto gotpty;
00372 }
00373 ::close(d->masterFd);
00374 d->masterFd = -1;
00375 }
00376 }
00377 }
00378
00379 kdWarning(175) << "Can't open a pseudo teletype" << endl;
00380 return false;
00381
00382 gotpty:
00383 return _attachPty(d->masterFd);
00384
00385 return true;
00386 }
00387
00388 void KPty::close()
00389 {
00390 if (d->masterFd < 0)
00391 return;
00392
00393 if (memcmp(d->ttyName.data(), "/dev/pts/", 9)) {
00394 if (!geteuid()) {
00395 struct stat st;
00396 if (!stat(d->ttyName.data(), &st)) {
00397 chown(d->ttyName.data(), 0, st.st_gid == getgid() ? 0 : -1);
00398 chmod(d->ttyName.data(), S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
00399 }
00400 } else {
00401 fcntl(d->masterFd, F_SETFD, 0);
00402 chownpty(false);
00403 }
00404 }
00405 ::close(d->slaveFd);
00406 ::close(d->masterFd);
00407 d->masterFd = d->slaveFd = -1;
00408 }
00409
00410 void KPty::setCTty()
00411 {
00412
00413
00414
00415
00416 setsid();
00417
00418
00419 #ifdef TIOCSCTTY
00420 ioctl(d->slaveFd, TIOCSCTTY, 0);
00421 #else
00422
00423 ::close(::open(d->ttyName, O_WRONLY, 0));
00424 #endif
00425
00426
00427 int pgrp = getpid();
00428 #if defined(_POSIX_VERSION) || defined(__svr4__)
00429 tcsetpgrp (d->slaveFd, pgrp);
00430 #elif defined(TIOCSPGRP)
00431 ioctl(d->slaveFd, TIOCSPGRP, (char *)&pgrp);
00432 #endif
00433 }
00434
00435 void KPty::login(const char *user, const char *remotehost)
00436 {
00437 #ifdef HAVE_UTEMPTER
00438 KProcess_Utmp utmp;
00439 utmp.cmdFd = d->masterFd;
00440 utmp << "/usr/sbin/utempter" << "-a" << d->ttyName << "";
00441 utmp.start(KProcess::Block);
00442 Q_UNUSED(user);
00443 Q_UNUSED(remotehost);
00444 #elif defined(USE_LOGIN)
00445 const char *str_ptr;
00446 struct utmp l_struct;
00447 memset(&l_struct, 0, sizeof(struct utmp));
00448
00449
00450 if (user)
00451 strncpy(l_struct.ut_name, user, UT_NAMESIZE);
00452
00453 if (remotehost)
00454 strncpy(l_struct.ut_host, remotehost, UT_HOSTSIZE);
00455
00456 # ifndef __GLIBC__
00457 str_ptr = d->ttyName.data();
00458 if (!memcmp(str_ptr, "/dev/", 5))
00459 str_ptr += 5;
00460 strncpy(l_struct.ut_line, str_ptr, UT_LINESIZE);
00461 # endif
00462
00463
00464
00465 {
00466 time_t ut_time_temp;
00467 time(&ut_time_temp);
00468 l_struct.ut_time=ut_time_temp;
00469 }
00470
00471 ::login(&l_struct);
00472 #else
00473 Q_UNUSED(user);
00474 Q_UNUSED(remotehost);
00475 #endif
00476 }
00477
00478 void KPty::logout()
00479 {
00480 #ifdef HAVE_UTEMPTER
00481 KProcess_Utmp utmp;
00482 utmp.cmdFd = d->masterFd;
00483 utmp << "/usr/sbin/utempter" << "-d" << d->ttyName;
00484 utmp.start(KProcess::Block);
00485 #elif defined(USE_LOGIN)
00486 const char *str_ptr = d->ttyName.data();
00487 if (!memcmp(str_ptr, "/dev/", 5))
00488 str_ptr += 5;
00489 # ifdef __GLIBC__
00490 else {
00491 const char *sl_ptr = strrchr(str_ptr, '/');
00492 if (sl_ptr)
00493 str_ptr = sl_ptr + 1;
00494 }
00495 # endif
00496 ::logout(str_ptr);
00497 #endif
00498 }
00499
00500 void KPty::setWinSize(int lines, int columns)
00501 {
00502 d->winSize.ws_row = (unsigned short)lines;
00503 d->winSize.ws_col = (unsigned short)columns;
00504 if (d->masterFd >= 0)
00505 ioctl( d->masterFd, TIOCSWINSZ, (char *)&d->winSize );
00506 }
00507
00508 void KPty::setXonXoff(bool useXonXoff)
00509 {
00510 d->xonXoff = useXonXoff;
00511 if (d->masterFd >= 0) {
00512
00513
00514
00515 struct ::termios ttmode;
00516
00517 _tcgetattr(d->masterFd, &ttmode);
00518
00519 if (!useXonXoff)
00520 ttmode.c_iflag &= ~(IXOFF | IXON);
00521 else
00522 ttmode.c_iflag |= (IXOFF | IXON);
00523
00524 _tcsetattr(d->masterFd, &ttmode);
00525 }
00526 }
00527
00528 void KPty::setUtf8Mode(bool useUtf8)
00529 {
00530 d->utf8 = useUtf8;
00531 #ifdef IUTF8
00532 if (d->masterFd >= 0) {
00533
00534
00535
00536 struct ::termios ttmode;
00537
00538 _tcgetattr(d->masterFd, &ttmode);
00539
00540 if (!useUtf8)
00541 ttmode.c_iflag &= ~IUTF8;
00542 else
00543 ttmode.c_iflag |= IUTF8;
00544
00545 _tcsetattr(d->masterFd, &ttmode);
00546 }
00547 #endif
00548 }
00549
00550 const char *KPty::ttyName() const
00551 {
00552 return d->ttyName.data();
00553 }
00554
00555 int KPty::masterFd() const
00556 {
00557 return d->masterFd;
00558 }
00559
00560 int KPty::slaveFd() const
00561 {
00562 return d->slaveFd;
00563 }
00564
00565
00566 bool KPty::chownpty(bool grant)
00567 {
00568 KProcess proc;
00569 proc << locate("exe", BASE_CHOWN) << (grant?"--grant":"--revoke") << QString::number(d->masterFd);
00570 return proc.start(KProcess::Block) && proc.normalExit() && !proc.exitStatus();
00571 }
00572