diff options
Diffstat (limited to 'kdbg/ttywnd.cpp')
| -rw-r--r-- | kdbg/ttywnd.cpp | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/kdbg/ttywnd.cpp b/kdbg/ttywnd.cpp new file mode 100644 index 0000000..b23f2f4 --- /dev/null +++ b/kdbg/ttywnd.cpp @@ -0,0 +1,239 @@ +/* + * Copyright Johannes Sixt + * This file is licensed under the GNU General Public License Version 2. + * See the file COPYING in the toplevel directory of the source directory. + */ + +#include <qsocketnotifier.h> +#include <qpopupmenu.h> +#include "ttywnd.h" +#include <kglobalsettings.h> +#include <klocale.h> + +#include "config.h" +#ifdef HAVE_FCNTL_H +#include <fcntl.h> +#endif +#ifdef HAVE_UNISTD_H +#include <unistd.h> /* open, close, etc. */ +#endif +#ifdef HAVE_SYS_IOCTL_H +#include <sys/ioctl.h> +#endif +#ifdef HAVE_SYS_STAT_H +#include <sys/stat.h> +#endif +#ifdef HAVE_PTY_H +#include <pty.h> /* openpty on Linux */ +#endif +#ifdef HAVE_LIBUTIL_H +#include <libutil.h> /* openpty on FreeBSD */ +#endif +#ifdef HAVE_UTIL_H /* openpty on NetBSD, OpenBSD */ +#include <util.h> +#endif +#include <errno.h> + +#include "mydebug.h" + + +STTY::STTY() : + QObject(), + m_masterfd(-1), + m_slavefd(-1), + m_outNotifier(0) +{ + if (findTTY()) + { + ::fcntl(m_masterfd, F_SETFL, O_NDELAY); + m_outNotifier = new QSocketNotifier(m_masterfd, QSocketNotifier::Read); + connect(m_outNotifier, SIGNAL(activated(int)), SLOT(outReceived(int))); + } else { + m_slavetty = QString(); + } +} + +STTY::~STTY() +{ + if (m_outNotifier) { + ::close(m_masterfd); + if (m_slavefd >= 0) + ::close(m_slavefd); + delete m_outNotifier; + } +} + +bool STTY::findTTY() +{ + m_masterfd = -1; + +#ifdef HAVE_FUNC_OPENPTY + /* use glibc2's openpty */ + if (m_masterfd < 0) + { + if (::openpty(&m_masterfd, &m_slavefd, 0, 0, 0) == 0) { + const char* tname = ::ttyname(m_slavefd); + if (tname != 0) { + m_slavetty = tname; + } else { + ::close(m_slavefd); + ::close(m_masterfd); + m_masterfd = m_slavefd = -1; + } + } + } +#endif + + // resort to BSD-style terminals + if (m_masterfd < 0) + { + const char* s3; + const char* s4; + + char ptynam[] = "/dev/ptyxx"; + char ttynam[] = "/dev/ttyxx"; + static const char ptyc3[] = "pqrstuvwxyzabcde"; + static const char ptyc4[] = "0123456789abcdef"; + + // Find a master pty that we can open + for (s3 = ptyc3; *s3 != 0 && m_masterfd < 0; s3++) + { + for (s4 = ptyc4; *s4 != 0; s4++) + { + ptynam[8] = ttynam[8] = *s3; + ptynam[9] = ttynam[9] = *s4; + if ((m_masterfd = ::open(ptynam,O_RDWR)) >= 0) + { + if (::geteuid() == 0 || ::access(ttynam,R_OK|W_OK) == 0) + { + m_slavetty = ttynam; + break; + } + ::close(m_masterfd); + m_masterfd = -1; + } + } + } + } + + return m_masterfd >= 0; +} + +void STTY::outReceived(int f) +{ + for (;;) { + char buf[1024]; + int n = ::read(f, buf, sizeof(buf)); + if (n < 0) { + if (errno != EAGAIN) { /* this is not an error */ + // ugh! error! somebody disconnect this signal please! + } + break; + } + emit output(buf, n); + if (n == 0) + break; + } +} + + + +TTYWindow::TTYWindow(QWidget* parent, const char* name) : + QTextEdit(parent, name), + m_tty(0), + m_hPos(0) +{ + setFont(KGlobalSettings::fixedFont()); + setReadOnly(true); + setAutoFormatting(AutoNone); + setTextFormat(PlainText); + setWordWrap(NoWrap); +} + +TTYWindow::~TTYWindow() +{ + if (m_tty) + deactivate(); +} + + +QString TTYWindow::activate() +{ + // allocate a pseudo terminal + m_tty = new STTY; + + QString ttyName = m_tty->slaveTTY(); + if (ttyName.isEmpty()) { + // failed to allocate terminal + delete m_tty; + m_tty = 0; + return QString(); + } else { + connect(m_tty, SIGNAL(output(char*,int)), SLOT(slotAppend(char*,int))); + return ttyName; + } +} + +void TTYWindow::deactivate() +{ + delete m_tty; + m_tty = 0; +} + +/** + * Note that it is necessary to track the horizontal position explicitly + * since if the user modifies the selected text in the window, the cursor + * position changes, too. + */ +void TTYWindow::slotAppend(char* buffer, int count) +{ + // parse off lines + char* start = buffer; + while (count > 0) { + int len = 0; + while (count > 0 && start[len] != '\n' && start[len] != '\r') { + --count; + ++len; + } + if (len > 0) { + QString str = QString::fromLatin1(start, len); + // replace text in the last line + int para = paragraphs()-1; + // this selection is non-empty only after a '\r' that was not + // followed by a '\n' + setSelection(para, m_hPos, para, m_hPos+len, 1); + removeSelectedText(1); + insertAt(str, para, m_hPos); + m_hPos += len; + start += len; + len = 0; + } + if (count > 0 && *start == '\r') { + ++start; + --count; + m_hPos = 0; + } + if (count > 0 && *start == '\n') { + ++start; + --count; + append(QString()); + m_hPos = 0; + } + } +} + +QPopupMenu* TTYWindow::createPopupMenu(const QPoint& pos) +{ + QPopupMenu* menu = QTextEdit::createPopupMenu(pos); + menu->insertSeparator(); + menu->insertItem(i18n("&Clear"), this, SLOT(slotClear())); + return menu; +} + +void TTYWindow::slotClear() +{ + clear(); + m_hPos = 0; +} + +#include "ttywnd.moc" |