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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_UTEMPTER
00084 # include <utempter.h>
00085 #endif
00086
00087 #ifdef HAVE_TERMIOS_H
00088
00089
00090 extern "C" {
00091 # include <termios.h>
00092 }
00093 #endif
00094
00095 #if !defined(__osf__)
00096 # ifdef HAVE_TERMIO_H
00097
00098 # include <termio.h>
00099 # endif
00100 #endif
00101
00102 #if defined (__FreeBSD__) || defined (__NetBSD__) || defined (__OpenBSD__) || defined (__bsdi__) || defined(__APPLE__) || defined (__DragonFly__)
00103 # define _tcgetattr(fd, ttmode) ioctl(fd, TIOCGETA, (char *)ttmode)
00104 #else
00105 # if defined(_HPUX_SOURCE) || defined(__Lynx__) || defined (__CYGWIN__)
00106 # define _tcgetattr(fd, ttmode) tcgetattr(fd, ttmode)
00107 # else
00108 # define _tcgetattr(fd, ttmode) ioctl(fd, TCGETS, (char *)ttmode)
00109 # endif
00110 #endif
00111
00112 #if defined (__FreeBSD__) || defined (__NetBSD__) || defined (__OpenBSD__) || defined (__bsdi__) || defined(__APPLE__) || defined (__DragonFly__)
00113 # define _tcsetattr(fd, ttmode) ioctl(fd, TIOCSETA, (char *)ttmode)
00114 #else
00115 # if defined(_HPUX_SOURCE) || defined(__CYGWIN__)
00116 # define _tcsetattr(fd, ttmode) tcsetattr(fd, TCSANOW, ttmode)
00117 # else
00118 # define _tcsetattr(fd, ttmode) ioctl(fd, TCSETS, (char *)ttmode)
00119 # endif
00120 #endif
00121
00122 #if defined (_HPUX_SOURCE)
00123 # define _TERMIOS_INCLUDED
00124 # include <bsdtty.h>
00125 #endif
00126
00127 #if defined(HAVE_PTY_H)
00128 # include <pty.h>
00129 #endif
00130
00131 #include <kdebug.h>
00132 #include <kstandarddirs.h>
00133
00134
00135 #ifndef CTRL
00136 # define CTRL(x) ((x) & 037)
00137 #endif
00138
00139 #define TTY_GROUP "tty"
00140
00142
00144
00145 #define BASE_CHOWN "kgrantpty"
00146
00147
00148
00150
00152
00153 struct KPtyPrivate {
00154 KPtyPrivate() :
00155 xonXoff(false),
00156 utf8(false),
00157 masterFd(-1), slaveFd(-1)
00158 {
00159 memset(&winSize, 0, sizeof(winSize));
00160 winSize.ws_row = 24;
00161 winSize.ws_col = 80;
00162 }
00163
00164 bool xonXoff : 1;
00165 bool utf8 : 1;
00166 int masterFd;
00167 int slaveFd;
00168 struct winsize winSize;
00169
00170 QCString ttyName;
00171 };
00172
00174
00176
00177 KPty::KPty()
00178 {
00179 d = new KPtyPrivate;
00180 }
00181
00182 KPty::~KPty()
00183 {
00184 close();
00185 delete d;
00186 }
00187
00188 bool KPty::open()
00189 {
00190 if (d->masterFd >= 0)
00191 return true;
00192
00193 QCString ptyName;
00194
00195
00196
00197
00198
00199
00200
00201
00202 #if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
00203 #ifdef _AIX
00204 d->masterFd = ::open("/dev/ptc",O_RDWR);
00205 #else
00206 d->masterFd = ::open("/dev/ptmx",O_RDWR);
00207 #endif
00208 if (d->masterFd >= 0)
00209 {
00210 char *ptsn = ptsname(d->masterFd);
00211 if (ptsn) {
00212 grantpt(d->masterFd);
00213 d->ttyName = ptsn;
00214 goto gotpty;
00215 } else {
00216 ::close(d->masterFd);
00217 d->masterFd = -1;
00218 }
00219 }
00220 #endif
00221
00222
00223 for (const char* s3 = "pqrstuvwxyzabcdefghijklmno"; *s3; s3++)
00224 {
00225 for (const char* s4 = "0123456789abcdefghijklmnopqrstuvwxyz"; *s4; s4++)
00226 {
00227 ptyName.sprintf("/dev/pty%c%c", *s3, *s4);
00228 d->ttyName.sprintf("/dev/tty%c%c", *s3, *s4);
00229
00230 d->masterFd = ::open(ptyName.data(), O_RDWR);
00231 if (d->masterFd >= 0)
00232 {
00233 #ifdef __sun
00234
00235
00236
00237
00238 int pgrp_rtn;
00239 if (ioctl(d->masterFd, TIOCGPGRP, &pgrp_rtn) == 0 || errno != EIO) {
00240 ::close(d->masterFd);
00241 d->masterFd = -1;
00242 continue;
00243 }
00244 #endif
00245 if (!access(d->ttyName.data(),R_OK|W_OK))
00246 {
00247 if (!geteuid())
00248 {
00249 struct group* p = getgrnam(TTY_GROUP);
00250 if (!p)
00251 p = getgrnam("wheel");
00252 gid_t gid = p ? p->gr_gid : getgid ();
00253
00254 chown(d->ttyName.data(), getuid(), gid);
00255 chmod(d->ttyName.data(), S_IRUSR|S_IWUSR|S_IWGRP);
00256 }
00257 goto gotpty;
00258 }
00259 ::close(d->masterFd);
00260 d->masterFd = -1;
00261 }
00262 }
00263 }
00264
00265 kdWarning(175) << "Can't open a pseudo teletype" << endl;
00266 return false;
00267
00268 gotpty:
00269 struct stat st;
00270 if (stat(d->ttyName.data(), &st))
00271 return false;
00272
00273
00274 if (((st.st_uid != getuid()) ||
00275 (st.st_mode & (S_IRGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH))) &&
00276 !chownpty(true))
00277 {
00278 kdWarning(175)
00279 << "chownpty failed for device " << ptyName << "::" << d->ttyName
00280 << "\nThis means the communication can be eavesdropped." << endl;
00281 }
00282
00283 #ifdef BSD
00284 revoke(d->ttyName.data());
00285 #endif
00286
00287 #ifdef HAVE_UNLOCKPT
00288 unlockpt(d->masterFd);
00289 #endif
00290
00291 d->slaveFd = ::open(d->ttyName.data(), O_RDWR | O_NOCTTY);
00292 if (d->slaveFd < 0)
00293 {
00294 kdWarning(175) << "Can't open slave pseudo teletype" << endl;
00295 ::close(d->masterFd);
00296 d->masterFd = -1;
00297 return false;
00298 }
00299
00300 #if (defined(__svr4__) || defined(__sgi__))
00301
00302 ioctl(d->slaveFd, I_PUSH, "ptem");
00303 ioctl(d->slaveFd, I_PUSH, "ldterm");
00304 #endif
00305
00306
00307
00308
00309
00310 struct ::termios ttmode;
00311
00312 _tcgetattr(d->slaveFd, &ttmode);
00313
00314 if (!d->xonXoff)
00315 ttmode.c_iflag &= ~(IXOFF | IXON);
00316 else
00317 ttmode.c_iflag |= (IXOFF | IXON);
00318
00319 #ifdef IUTF8
00320 if (!d->utf8)
00321 ttmode.c_iflag &= ~IUTF8;
00322 else
00323 ttmode.c_iflag |= IUTF8;
00324 #endif
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 utempter_add_record (d->masterFd, remotehost);
00392 Q_UNUSED(user);
00393 #elif defined(USE_LOGIN)
00394 const char *str_ptr;
00395 struct utmp l_struct;
00396 memset(&l_struct, 0, sizeof(struct utmp));
00397
00398
00399 if (user)
00400 strncpy(l_struct.ut_name, user, UT_NAMESIZE);
00401
00402 if (remotehost)
00403 strncpy(l_struct.ut_host, remotehost, UT_HOSTSIZE);
00404
00405 # ifndef __GLIBC__
00406 str_ptr = d->ttyName.data();
00407 if (!memcmp(str_ptr, "/dev/", 5))
00408 str_ptr += 5;
00409 strncpy(l_struct.ut_line, str_ptr, UT_LINESIZE);
00410 # endif
00411
00412
00413
00414 {
00415 time_t ut_time_temp;
00416 time(&ut_time_temp);
00417 l_struct.ut_time=ut_time_temp;
00418 }
00419
00420 ::login(&l_struct);
00421 #else
00422 Q_UNUSED(user);
00423 Q_UNUSED(remotehost);
00424 #endif
00425 }
00426
00427 void KPty::logout()
00428 {
00429 #ifdef HAVE_UTEMPTER
00430 utempter_remove_record (d->masterFd);
00431 #elif defined(USE_LOGIN)
00432 const char *str_ptr = d->ttyName.data();
00433 if (!memcmp(str_ptr, "/dev/", 5))
00434 str_ptr += 5;
00435 # ifdef __GLIBC__
00436 else {
00437 const char *sl_ptr = strrchr(str_ptr, '/');
00438 if (sl_ptr)
00439 str_ptr = sl_ptr + 1;
00440 }
00441 # endif
00442 ::logout(str_ptr);
00443 #endif
00444 }
00445
00446 void KPty::setWinSize(int lines, int columns)
00447 {
00448 d->winSize.ws_row = (unsigned short)lines;
00449 d->winSize.ws_col = (unsigned short)columns;
00450 if (d->masterFd >= 0)
00451 ioctl( d->masterFd, TIOCSWINSZ, (char *)&d->winSize );
00452 }
00453
00454 void KPty::setXonXoff(bool useXonXoff)
00455 {
00456 d->xonXoff = useXonXoff;
00457 if (d->masterFd >= 0) {
00458
00459
00460
00461 struct ::termios ttmode;
00462
00463 _tcgetattr(d->masterFd, &ttmode);
00464
00465 if (!useXonXoff)
00466 ttmode.c_iflag &= ~(IXOFF | IXON);
00467 else
00468 ttmode.c_iflag |= (IXOFF | IXON);
00469
00470 _tcsetattr(d->masterFd, &ttmode);
00471 }
00472 }
00473
00474 void KPty::setUtf8Mode(bool useUtf8)
00475 {
00476 d->utf8 = useUtf8;
00477 #ifdef IUTF8
00478 if (d->masterFd >= 0) {
00479
00480
00481
00482 struct ::termios ttmode;
00483
00484 _tcgetattr(d->masterFd, &ttmode);
00485
00486 if (!useUtf8)
00487 ttmode.c_iflag &= ~IUTF8;
00488 else
00489 ttmode.c_iflag |= IUTF8;
00490
00491 _tcsetattr(d->masterFd, &ttmode);
00492 }
00493 #endif
00494 }
00495
00496 const char *KPty::ttyName() const
00497 {
00498 return d->ttyName.data();
00499 }
00500
00501 int KPty::masterFd() const
00502 {
00503 return d->masterFd;
00504 }
00505
00506 int KPty::slaveFd() const
00507 {
00508 return d->slaveFd;
00509 }
00510
00511
00512 bool KPty::chownpty(bool grant)
00513 {
00514 KProcess proc;
00515 proc << locate("exe", BASE_CHOWN) << (grant?"--grant":"--revoke") << QString::number(d->masterFd);
00516 return proc.start(KProcess::Block) && proc.normalExit() && !proc.exitStatus();
00517 }
00518