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Diffstat (limited to 'tdmlib/tdmtsak.cpp')
| -rw-r--r-- | tdmlib/tdmtsak.cpp | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/tdmlib/tdmtsak.cpp b/tdmlib/tdmtsak.cpp new file mode 100644 index 000000000..18acd05d2 --- /dev/null +++ b/tdmlib/tdmtsak.cpp @@ -0,0 +1,180 @@ +/* + This file is part of the TDE project + Copyright (C) 2011 Timothy Pearson <kb9vqf@pearsoncomputing.net> + + 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 "tdmtsak.h" + +#include <tqstringlist.h> + +#define FIFO_FILE "/tmp/ksocket-global/tsak" + +TQString exec(const char * cmd) { + FILE* pipe = popen(cmd, "r"); + if (!pipe) return "ERROR"; + char buffer[128]; + TQString result = ""; + while(!feof(pipe)) { + if(fgets(buffer, 128, pipe) != NULL) + result += buffer; + } + pclose(pipe); + return result; +} + +bool is_vt_local() { + const char * currentDisplay; + currentDisplay = getenv ("DISPLAY"); + if (currentDisplay == NULL) { + return false; + } + else { + TQString cvtName = ""; + TQString output = exec("tdmctl list"); + TQStringList sessionList = TQStringList::split('\t', output, false); + // See if the current session is local + for ( TQStringList::Iterator it = sessionList.begin(); it != sessionList.end(); ++it ) { + TQStringList sessionInfoList = TQStringList::split(',', *it, true); + if ((*(sessionInfoList.at(0))).startsWith(":")) { + if (TQString(currentDisplay).startsWith(*(sessionInfoList.at(0)))) { + return true; + } + } + } + // Not local + return false; + } +} + +bool is_vt_active() { + const char * currentDisplay; + currentDisplay = getenv ("DISPLAY"); + if (currentDisplay == NULL) { + return true; + } + else { + TQString cvtName = ""; + TQString output = exec("tdmctl list"); + TQString curConsole = exec("fgconsole"); + bool intFound; + int curConsoleNum = curConsole.toInt(&intFound); + if (intFound == false) { + return true; + } + curConsole = TQString("vt%1").arg(curConsoleNum);; + TQStringList sessionList = TQStringList::split('\t', output, false); + for ( TQStringList::Iterator it = sessionList.begin(); it != sessionList.end(); ++it ) { + TQStringList sessionInfoList = TQStringList::split(',', *it, true); + if ((*(sessionInfoList.at(0))).startsWith(":")) { + if ((*(sessionInfoList.at(1))) == TQString(curConsole)) { + cvtName = (*(sessionInfoList.at(0))); + } + } + } + if (cvtName != "") { + if (TQString(currentDisplay).startsWith(cvtName)) { + return true; + } + else { + return false; + } + } + else { + // See if the current session is local + // If it is, then the VT is not currently active and the SAK must be requested later when it is active + for ( TQStringList::Iterator it = sessionList.begin(); it != sessionList.end(); ++it ) { + TQStringList sessionInfoList = TQStringList::split(',', *it, true); + if ((*(sessionInfoList.at(0))).startsWith(":")) { + if (TQString(currentDisplay).startsWith(*(sessionInfoList.at(0)))) { + return false; + } + } + } + // Hmm, not local + // Do not reject the SAK + return true; + } + } +} + +int main (int argc, char *argv[]) +{ + int mPipe_fd; + char readbuf[128]; + int numread; + + int verifier_result = tde_sak_verify_calling_process(); + + bool isdm = false; + if (argc == 2) { + if (strcmp(argv[1], "dm") == 0) { + isdm = true; + } + } + + if (!isdm) { + // Verify that the session is local + // Remote sessions cannot press the SAK for obvious reasons + if (!is_vt_local()) { + return 6; // SAK not available + } + } + + if (verifier_result == 0) { + // OK, the calling process is authorized to retrieve SAK data + // First, flush the buffer + mPipe_fd = open(FIFO_FILE, O_RDONLY | O_NONBLOCK); + numread = 1; + while (numread > 0) { + numread = read(mPipe_fd, readbuf, 6); + } + close(mPipe_fd); + // Now wait for SAK press + mPipe_fd = open(FIFO_FILE, O_RDONLY); + while (mPipe_fd > -1) { + numread = read(mPipe_fd, readbuf, 6); + readbuf[numread] = 0; + readbuf[127] = 0; + if (strcmp(readbuf, "SAK\n\r") == 0) { + close(mPipe_fd); + if (is_vt_active()) { + return 0; + } + else { + usleep(100); + // Flush the buffer + mPipe_fd = open(FIFO_FILE, O_RDONLY | O_NONBLOCK); + numread = 1; + while (numread > 0) { + numread = read(mPipe_fd, readbuf, 6); + } + close(mPipe_fd); + mPipe_fd = open(FIFO_FILE, O_RDONLY); + } + } + else { + usleep(100); + } + } + close(mPipe_fd); + return 6; + } + else { + return verifier_result; + } +}
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