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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 logged(false),
00169 masterFd(-1), slaveFd(-1)
00170 {
00171 memset(&winSize, 0, sizeof(winSize));
00172 winSize.ws_row = 24;
00173 winSize.ws_col = 80;
00174 }
00175
00176 bool xonXoff : 1;
00177 bool utf8 : 1;
00178 bool logged : 1;
00179 int masterFd;
00180 int slaveFd;
00181 struct winsize winSize;
00182
00183 QCString ttyName;
00184 };
00185
00187
00189
00190 KPty::KPty()
00191 {
00192 d = new KPtyPrivate;
00193 }
00194
00195 KPty::~KPty()
00196 {
00197 close();
00198 delete d;
00199 }
00200
00201 bool KPty::open()
00202 {
00203 if (d->masterFd >= 0)
00204 return true;
00205
00206 QCString ptyName;
00207
00208
00209
00210
00211
00212
00213
00214
00215 #if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
00216 #ifdef _AIX
00217 d->masterFd = ::open("/dev/ptc",O_RDWR);
00218 #else
00219 d->masterFd = ::open("/dev/ptmx",O_RDWR);
00220 #endif
00221 if (d->masterFd >= 0)
00222 {
00223 char *ptsn = ptsname(d->masterFd);
00224 if (ptsn) {
00225 grantpt(d->masterFd);
00226 d->ttyName = ptsn;
00227 goto gotpty;
00228 } else {
00229 ::close(d->masterFd);
00230 d->masterFd = -1;
00231 }
00232 }
00233 #endif
00234
00235
00236 for (const char* s3 = "pqrstuvwxyzabcdefghijklmno"; *s3; s3++)
00237 {
00238 for (const char* s4 = "0123456789abcdefghijklmnopqrstuvwxyz"; *s4; s4++)
00239 {
00240 ptyName.sprintf("/dev/pty%c%c", *s3, *s4);
00241 d->ttyName.sprintf("/dev/tty%c%c", *s3, *s4);
00242
00243 d->masterFd = ::open(ptyName.data(), O_RDWR);
00244 if (d->masterFd >= 0)
00245 {
00246 #ifdef __sun
00247
00248
00249
00250
00251 int pgrp_rtn;
00252 if (ioctl(d->masterFd, TIOCGPGRP, &pgrp_rtn) == 0 || errno != EIO) {
00253 ::close(d->masterFd);
00254 d->masterFd = -1;
00255 continue;
00256 }
00257 #endif
00258 if (!access(d->ttyName.data(),R_OK|W_OK))
00259 {
00260 if (!geteuid())
00261 {
00262 struct group* p = getgrnam(TTY_GROUP);
00263 if (!p)
00264 p = getgrnam("wheel");
00265 gid_t gid = p ? p->gr_gid : getgid ();
00266
00267 chown(d->ttyName.data(), getuid(), gid);
00268 chmod(d->ttyName.data(), S_IRUSR|S_IWUSR|S_IWGRP);
00269 }
00270 goto gotpty;
00271 }
00272 ::close(d->masterFd);
00273 d->masterFd = -1;
00274 }
00275 }
00276 }
00277
00278 kdWarning(175) << "Can't open a pseudo teletype" << endl;
00279 return false;
00280
00281 gotpty:
00282 struct stat st;
00283 if (stat(d->ttyName.data(), &st))
00284 return false;
00285
00286
00287 if (((st.st_uid != getuid()) ||
00288 (st.st_mode & (S_IRGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH))) &&
00289 !chownpty(true))
00290 {
00291 kdWarning(175)
00292 << "chownpty failed for device " << ptyName << "::" << d->ttyName
00293 << "\nThis means the communication can be eavesdropped." << endl;
00294 }
00295
00296 #ifdef BSD
00297 revoke(d->ttyName.data());
00298 #endif
00299
00300 #ifdef HAVE_UNLOCKPT
00301 unlockpt(d->masterFd);
00302 #endif
00303
00304 d->slaveFd = ::open(d->ttyName.data(), O_RDWR | O_NOCTTY);
00305 if (d->slaveFd < 0)
00306 {
00307 kdWarning(175) << "Can't open slave pseudo teletype" << endl;
00308 ::close(d->masterFd);
00309 d->masterFd = -1;
00310 return false;
00311 }
00312
00313 #if (defined(__svr4__) || defined(__sgi__))
00314
00315 ioctl(d->slaveFd, I_PUSH, "ptem");
00316 ioctl(d->slaveFd, I_PUSH, "ldterm");
00317 #endif
00318
00319
00320
00321
00322
00323 struct ::termios ttmode;
00324
00325 _tcgetattr(d->slaveFd, &ttmode);
00326
00327 if (!d->xonXoff)
00328 ttmode.c_iflag &= ~(IXOFF | IXON);
00329 else
00330 ttmode.c_iflag |= (IXOFF | IXON);
00331
00332 #ifdef IUTF8
00333 if (!d->utf8)
00334 ttmode.c_iflag &= ~IUTF8;
00335 else
00336 ttmode.c_iflag |= IUTF8;
00337 #endif
00338
00339 ttmode.c_cc[VINTR] = CTRL('C' - '@');
00340 ttmode.c_cc[VQUIT] = CTRL('\\' - '@');
00341 ttmode.c_cc[VERASE] = 0177;
00342
00343 _tcsetattr(d->slaveFd, &ttmode);
00344
00345
00346 ioctl(d->slaveFd, TIOCSWINSZ, (char *)&d->winSize);
00347
00348 fcntl(d->masterFd, F_SETFD, FD_CLOEXEC);
00349 fcntl(d->slaveFd, F_SETFD, FD_CLOEXEC);
00350
00351 return true;
00352 }
00353
00354 void KPty::close()
00355 {
00356 if (d->masterFd < 0)
00357 return;
00358 logout();
00359
00360 if (memcmp(d->ttyName.data(), "/dev/pts/", 9)) {
00361 if (!geteuid()) {
00362 struct stat st;
00363 if (!stat(d->ttyName.data(), &st)) {
00364 chown(d->ttyName.data(), 0, st.st_gid == getgid() ? 0 : -1);
00365 chmod(d->ttyName.data(), S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
00366 }
00367 } else {
00368 fcntl(d->masterFd, F_SETFD, 0);
00369 chownpty(false);
00370 }
00371 }
00372 ::close(d->slaveFd);
00373 ::close(d->masterFd);
00374 d->masterFd = d->slaveFd = -1;
00375 }
00376
00377 void KPty::setCTty()
00378 {
00379
00380
00381
00382
00383 setsid();
00384
00385
00386 #ifdef TIOCSCTTY
00387 ioctl(d->slaveFd, TIOCSCTTY, 0);
00388 #else
00389
00390 ::close(::open(d->ttyName, O_WRONLY, 0));
00391 #endif
00392
00393
00394 int pgrp = getpid();
00395 #if defined(_POSIX_VERSION) || defined(__svr4__)
00396 tcsetpgrp (d->slaveFd, pgrp);
00397 #elif defined(TIOCSPGRP)
00398 ioctl(d->slaveFd, TIOCSPGRP, (char *)&pgrp);
00399 #endif
00400 }
00401
00402 void KPty::login(const char *user, const char *remotehost)
00403 {
00404 if (d->logged)
00405 return;
00406 d->logged = true;
00407 #ifdef HAVE_UTEMPTER
00408 KProcess_Utmp utmp;
00409 utmp.cmdFd = d->masterFd;
00410 utmp << "/usr/sbin/utempter" << "-a" << d->ttyName << "";
00411 utmp.start(KProcess::Block);
00412 Q_UNUSED(user);
00413 Q_UNUSED(remotehost);
00414 #elif defined(USE_LOGIN)
00415 const char *str_ptr;
00416 struct utmp l_struct;
00417 memset(&l_struct, 0, sizeof(struct utmp));
00418
00419
00420 if (user)
00421 strncpy(l_struct.ut_name, user, UT_NAMESIZE);
00422
00423 if (remotehost)
00424 strncpy(l_struct.ut_host, remotehost, UT_HOSTSIZE);
00425
00426 # ifndef __GLIBC__
00427 str_ptr = d->ttyName.data();
00428 if (!memcmp(str_ptr, "/dev/", 5))
00429 str_ptr += 5;
00430 strncpy(l_struct.ut_line, str_ptr, UT_LINESIZE);
00431 # endif
00432
00433
00434
00435 {
00436 time_t ut_time_temp;
00437 time(&ut_time_temp);
00438 l_struct.ut_time=ut_time_temp;
00439 }
00440
00441 ::login(&l_struct);
00442 #else
00443 Q_UNUSED(user);
00444 Q_UNUSED(remotehost);
00445 #endif
00446 }
00447
00448 void KPty::logout()
00449 {
00450 if (!d->logged)
00451 return;
00452 d->logged = false;
00453 #ifdef HAVE_UTEMPTER
00454 KProcess_Utmp utmp;
00455 utmp.cmdFd = d->masterFd;
00456 utmp << "/usr/sbin/utempter" << "-d" << d->ttyName;
00457 utmp.start(KProcess::Block);
00458 #elif defined(USE_LOGIN)
00459 const char *str_ptr = d->ttyName.data();
00460 if (!memcmp(str_ptr, "/dev/", 5))
00461 str_ptr += 5;
00462 # ifdef __GLIBC__
00463 else {
00464 const char *sl_ptr = strrchr(str_ptr, '/');
00465 if (sl_ptr)
00466 str_ptr = sl_ptr + 1;
00467 }
00468 # endif
00469 ::logout(str_ptr);
00470 #endif
00471 }
00472
00473 void KPty::setWinSize(int lines, int columns)
00474 {
00475 d->winSize.ws_row = (unsigned short)lines;
00476 d->winSize.ws_col = (unsigned short)columns;
00477 if (d->masterFd >= 0)
00478 ioctl( d->masterFd, TIOCSWINSZ, (char *)&d->winSize );
00479 }
00480
00481 void KPty::setXonXoff(bool useXonXoff)
00482 {
00483 d->xonXoff = useXonXoff;
00484 if (d->masterFd >= 0) {
00485
00486
00487
00488 struct ::termios ttmode;
00489
00490 _tcgetattr(d->masterFd, &ttmode);
00491
00492 if (!useXonXoff)
00493 ttmode.c_iflag &= ~(IXOFF | IXON);
00494 else
00495 ttmode.c_iflag |= (IXOFF | IXON);
00496
00497 _tcsetattr(d->masterFd, &ttmode);
00498 }
00499 }
00500
00501 void KPty::setUtf8Mode(bool useUtf8)
00502 {
00503 d->utf8 = useUtf8;
00504 #ifdef IUTF8
00505 if (d->masterFd >= 0) {
00506
00507
00508
00509 struct ::termios ttmode;
00510
00511 _tcgetattr(d->masterFd, &ttmode);
00512
00513 if (!useUtf8)
00514 ttmode.c_iflag &= ~IUTF8;
00515 else
00516 ttmode.c_iflag |= IUTF8;
00517
00518 _tcsetattr(d->masterFd, &ttmode);
00519 }
00520 #endif
00521 }
00522
00523 const char *KPty::ttyName() const
00524 {
00525 return d->ttyName.data();
00526 }
00527
00528 int KPty::masterFd() const
00529 {
00530 return d->masterFd;
00531 }
00532
00533 int KPty::slaveFd() const
00534 {
00535 return d->slaveFd;
00536 }
00537
00538
00539 bool KPty::chownpty(bool grant)
00540 {
00541 KProcess proc;
00542 proc << locate("exe", BASE_CHOWN) << (grant?"--grant":"--revoke") << QString::number(d->masterFd);
00543 return proc.start(KProcess::Block) && proc.normalExit() && !proc.exitStatus();
00544 }
00545