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Diffstat (limited to 'src/kernel/qprocess_unix.cpp')
| -rw-r--r-- | src/kernel/qprocess_unix.cpp | 1409 |
1 files changed, 1409 insertions, 0 deletions
diff --git a/src/kernel/qprocess_unix.cpp b/src/kernel/qprocess_unix.cpp new file mode 100644 index 0000000..40476d3 --- /dev/null +++ b/src/kernel/qprocess_unix.cpp @@ -0,0 +1,1409 @@ +/**************************************************************************** +** +** Implementation of QProcess class for Unix +** +** Created : 20000905 +** +** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the kernel module of the Qt GUI Toolkit. +** +** This file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free +** Software Foundation and appearing in the files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free Qt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing requirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at sales@trolltech.com. +** +** This file may be used under the terms of the Q Public License as +** defined by Trolltech ASA and appearing in the file LICENSE.QPL +** included in the packaging of this file. Licensees holding valid Qt +** Commercial licenses may use this file in accordance with the Qt +** Commercial License Agreement provided with the Software. +** +** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, +** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +#include "qplatformdefs.h" + +// Solaris redefines connect -> __xnet_connect with _XOPEN_SOURCE_EXTENDED. +#if defined(connect) +#undef connect +#endif + +#include "qprocess.h" + +#ifndef QT_NO_PROCESS + +#include "qapplication.h" +#include "qptrqueue.h" +#include "qptrlist.h" +#include "qsocketnotifier.h" +#include "qtimer.h" +#include "qcleanuphandler.h" +#include "qregexp.h" +#include "private/qinternal_p.h" + +#include <stdlib.h> +#include <errno.h> +#include <sys/types.h> + +#ifdef __MIPSEL__ +# ifndef SOCK_DGRAM +# define SOCK_DGRAM 1 +# endif +# ifndef SOCK_STREAM +# define SOCK_STREAM 2 +# endif +#endif + +//#define QT_QPROCESS_DEBUG + + +#ifdef Q_C_CALLBACKS +extern "C" { +#endif // Q_C_CALLBACKS + + QT_SIGNAL_RETTYPE qt_C_sigchldHnd(QT_SIGNAL_ARGS); + +#ifdef Q_C_CALLBACKS +} +#endif // Q_C_CALLBACKS + + +class QProc; +class QProcessManager; +class QProcessPrivate +{ +public: + QProcessPrivate(); + ~QProcessPrivate(); + + void closeOpenSocketsForChild(); + void newProc( pid_t pid, QProcess *process ); + + QMembuf bufStdout; + QMembuf bufStderr; + + QPtrQueue<QByteArray> stdinBuf; + + QSocketNotifier *notifierStdin; + QSocketNotifier *notifierStdout; + QSocketNotifier *notifierStderr; + + ssize_t stdinBufRead; + QProc *proc; + + bool exitValuesCalculated; + bool socketReadCalled; + + static QProcessManager *procManager; +}; + + +/*********************************************************************** + * + * QProc + * + **********************************************************************/ +/* + The class QProcess does not necessarily map exactly to the running + child processes: if the process is finished, the QProcess class may still be + there; furthermore a user can use QProcess to start more than one process. + + The helper-class QProc has the semantics that one instance of this class maps + directly to a running child process. +*/ +class QProc +{ +public: + QProc( pid_t p, QProcess *proc=0 ) : pid(p), process(proc) + { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProc: Constructor for pid %d and QProcess %p", pid, process ); +#endif + socketStdin = 0; + socketStdout = 0; + socketStderr = 0; + } + ~QProc() + { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProc: Destructor for pid %d and QProcess %p", pid, process ); +#endif + if ( process ) { + if ( process->d->notifierStdin ) + process->d->notifierStdin->setEnabled( FALSE ); + if ( process->d->notifierStdout ) + process->d->notifierStdout->setEnabled( FALSE ); + if ( process->d->notifierStderr ) + process->d->notifierStderr->setEnabled( FALSE ); + process->d->proc = 0; + } + if( socketStdin ) + ::close( socketStdin ); + if( socketStdout ) + ::close( socketStdout ); + if( socketStderr ) + ::close( socketStderr ); + } + + pid_t pid; + int socketStdin; + int socketStdout; + int socketStderr; + QProcess *process; +}; + +/*********************************************************************** + * + * QProcessManager + * + **********************************************************************/ +class QProcessManager : public QObject +{ + Q_OBJECT + +public: + QProcessManager(); + ~QProcessManager(); + + void append( QProc *p ); + void remove( QProc *p ); + + void cleanup(); + +public slots: + void removeMe(); + void sigchldHnd( int ); + +public: + struct sigaction oldactChld; + struct sigaction oldactPipe; + QPtrList<QProc> *procList; + int sigchldFd[2]; + +private: + QSocketNotifier *sn; +}; + +static void qprocess_cleanup() +{ + delete QProcessPrivate::procManager; + QProcessPrivate::procManager = 0; +} + +#ifdef Q_OS_QNX6 +#define BAILOUT close(tmpSocket);close(socketFD[1]);return -1; +int qnx6SocketPairReplacement (int socketFD[2]) { + int tmpSocket; + tmpSocket = socket (AF_INET, SOCK_STREAM, 0); + if (tmpSocket == -1) + return -1; + socketFD[1] = socket(AF_INET, SOCK_STREAM, 0); + if (socketFD[1] == -1) { BAILOUT }; + + sockaddr_in ipAddr; + memset(&ipAddr, 0, sizeof(ipAddr)); + ipAddr.sin_family = AF_INET; + ipAddr.sin_addr.s_addr = INADDR_ANY; + + int socketOptions = 1; + setsockopt(tmpSocket, SOL_SOCKET, SO_REUSEADDR, &socketOptions, sizeof(int)); + + bool found = FALSE; + for (int socketIP = 2000; (socketIP < 2500) && !(found); socketIP++) { + ipAddr.sin_port = htons(socketIP); + if (bind(tmpSocket, (struct sockaddr *)&ipAddr, sizeof(ipAddr))) + found = TRUE; + } + + if (listen(tmpSocket, 5)) { BAILOUT }; + + // Select non-blocking mode + int originalFlags = fcntl(socketFD[1], F_GETFL, 0); + fcntl(socketFD[1], F_SETFL, originalFlags | O_NONBLOCK); + + // Request connection + if (connect(socketFD[1], (struct sockaddr*)&ipAddr, sizeof(ipAddr))) + if (errno != EINPROGRESS) { BAILOUT }; + + // Accept connection + socketFD[0] = accept(tmpSocket, (struct sockaddr *)NULL, (size_t *)NULL); + if(socketFD[0] == -1) { BAILOUT }; + + // We're done + close(tmpSocket); + + // Restore original flags , ie return to blocking + fcntl(socketFD[1], F_SETFL, originalFlags); + return 0; +} +#undef BAILOUT +#endif + +QProcessManager::QProcessManager() : sn(0) +{ + procList = new QPtrList<QProc>; + procList->setAutoDelete( TRUE ); + + // The SIGCHLD handler writes to a socket to tell the manager that + // something happened. This is done to get the processing in sync with the + // event reporting. +#ifndef Q_OS_QNX6 + if ( ::socketpair( AF_UNIX, SOCK_STREAM, 0, sigchldFd ) ) { +#else + if ( qnx6SocketPairReplacement (sigchldFd) ) { +#endif + sigchldFd[0] = 0; + sigchldFd[1] = 0; + } else { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager: install socket notifier (%d)", sigchldFd[1] ); +#endif + sn = new QSocketNotifier( sigchldFd[1], + QSocketNotifier::Read, this ); + connect( sn, SIGNAL(activated(int)), + this, SLOT(sigchldHnd(int)) ); + sn->setEnabled( TRUE ); + } + + // install a SIGCHLD handler and ignore SIGPIPE + struct sigaction act; + +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager: install a SIGCHLD handler" ); +#endif + act.sa_handler = qt_C_sigchldHnd; + sigemptyset( &(act.sa_mask) ); + sigaddset( &(act.sa_mask), SIGCHLD ); + act.sa_flags = SA_NOCLDSTOP; +#if defined(SA_RESTART) + act.sa_flags |= SA_RESTART; +#endif + if ( sigaction( SIGCHLD, &act, &oldactChld ) != 0 ) + qWarning( "Error installing SIGCHLD handler" ); + +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager: install a SIGPIPE handler (SIG_IGN)" ); +#endif + act.sa_handler = QT_SIGNAL_IGNORE; + sigemptyset( &(act.sa_mask) ); + sigaddset( &(act.sa_mask), SIGPIPE ); + act.sa_flags = 0; + if ( sigaction( SIGPIPE, &act, &oldactPipe ) != 0 ) + qWarning( "Error installing SIGPIPE handler" ); +} + +QProcessManager::~QProcessManager() +{ + delete procList; + + if ( sigchldFd[0] != 0 ) + ::close( sigchldFd[0] ); + if ( sigchldFd[1] != 0 ) + ::close( sigchldFd[1] ); + + // restore SIGCHLD handler +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager: restore old sigchild handler" ); +#endif + if ( sigaction( SIGCHLD, &oldactChld, 0 ) != 0 ) + qWarning( "Error restoring SIGCHLD handler" ); + +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager: restore old sigpipe handler" ); +#endif + if ( sigaction( SIGPIPE, &oldactPipe, 0 ) != 0 ) + qWarning( "Error restoring SIGPIPE handler" ); +} + +void QProcessManager::append( QProc *p ) +{ + procList->append( p ); +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager: append process (procList.count(): %d)", procList->count() ); +#endif +} + +void QProcessManager::remove( QProc *p ) +{ + procList->remove( p ); +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager: remove process (procList.count(): %d)", procList->count() ); +#endif + cleanup(); +} + +void QProcessManager::cleanup() +{ + if ( procList->count() == 0 ) { + QTimer::singleShot( 0, this, SLOT(removeMe()) ); + } +} + +void QProcessManager::removeMe() +{ + if ( procList->count() == 0 ) { + qRemovePostRoutine(qprocess_cleanup); + QProcessPrivate::procManager = 0; + delete this; + } +} + +void QProcessManager::sigchldHnd( int fd ) +{ + // Disable the socket notifier to make sure that this function is not + // called recursively -- this can happen, if you enter the event loop in + // the slot connected to the processExited() signal (e.g. by showing a + // modal dialog) and there are more than one process which exited in the + // meantime. + if ( sn ) { + if ( !sn->isEnabled() ) + return; + sn->setEnabled( FALSE ); + } + + char tmp; + ::read( fd, &tmp, sizeof(tmp) ); +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager::sigchldHnd()" ); +#endif + QProc *proc; + QProcess *process; + bool removeProc; + proc = procList->first(); + while ( proc != 0 ) { + removeProc = FALSE; + process = proc->process; + if ( process != 0 ) { + if ( !process->isRunning() ) { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager::sigchldHnd() (PID: %d): process exited (QProcess available)", proc->pid ); +#endif + /* + Apparently, there is not consistency among different + operating systems on how to use FIONREAD. + + FreeBSD, Linux and Solaris all expect the 3rd + argument to ioctl() to be an int, which is normally + 32-bit even on 64-bit machines. + + IRIX, on the other hand, expects a size_t, which is + 64-bit on 64-bit machines. + + So, the solution is to use size_t initialized to + zero to make sure all bits are set to zero, + preventing underflow with the FreeBSD/Linux/Solaris + ioctls. + */ + size_t nbytes = 0; + // read pending data + if ( proc->socketStdout && ::ioctl(proc->socketStdout, FIONREAD, (char*)&nbytes)==0 && nbytes>0 ) { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager::sigchldHnd() (PID: %d): reading %d bytes of pending data on stdout", proc->pid, nbytes ); +#endif + process->socketRead( proc->socketStdout ); + } + nbytes = 0; + if ( proc->socketStderr && ::ioctl(proc->socketStderr, FIONREAD, (char*)&nbytes)==0 && nbytes>0 ) { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager::sigchldHnd() (PID: %d): reading %d bytes of pending data on stderr", proc->pid, nbytes ); +#endif + process->socketRead( proc->socketStderr ); + } + // close filedescriptors if open, and disable the + // socket notifiers + if ( proc->socketStdout ) { + ::close( proc->socketStdout ); + proc->socketStdout = 0; + if (process->d->notifierStdout) + process->d->notifierStdout->setEnabled(FALSE); + } + if ( proc->socketStderr ) { + ::close( proc->socketStderr ); + proc->socketStderr = 0; + if (process->d->notifierStderr) + process->d->notifierStderr->setEnabled(FALSE); + } + + if ( process->notifyOnExit ) + emit process->processExited(); + + removeProc = TRUE; + } + } else { + int status; + if ( ::waitpid( proc->pid, &status, WNOHANG ) == proc->pid ) { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessManager::sigchldHnd() (PID: %d): process exited (QProcess not available)", proc->pid ); +#endif + removeProc = TRUE; + } + } + if ( removeProc ) { + QProc *oldproc = proc; + proc = procList->next(); + remove( oldproc ); + } else { + proc = procList->next(); + } + } + if ( sn ) + sn->setEnabled( TRUE ); +} + +#include "qprocess_unix.moc" + + +/*********************************************************************** + * + * QProcessPrivate + * + **********************************************************************/ +QProcessManager *QProcessPrivate::procManager = 0; + +QProcessPrivate::QProcessPrivate() +{ +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessPrivate: Constructor" ); +#endif + stdinBufRead = 0; + + notifierStdin = 0; + notifierStdout = 0; + notifierStderr = 0; + + exitValuesCalculated = FALSE; + socketReadCalled = FALSE; + + proc = 0; +} + +QProcessPrivate::~QProcessPrivate() +{ +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcessPrivate: Destructor" ); +#endif + + if ( proc != 0 ) { + if ( proc->socketStdin != 0 ) { + ::close( proc->socketStdin ); + proc->socketStdin = 0; + } + proc->process = 0; + } + + while ( !stdinBuf.isEmpty() ) { + delete stdinBuf.dequeue(); + } + delete notifierStdin; + delete notifierStdout; + delete notifierStderr; +} + +/* + Closes all open sockets in the child process that are not needed by the child + process. Otherwise one child may have an open socket on standard input, etc. + of another child. +*/ +void QProcessPrivate::closeOpenSocketsForChild() +{ + if ( procManager != 0 ) { + if ( procManager->sigchldFd[0] != 0 ) + ::close( procManager->sigchldFd[0] ); + if ( procManager->sigchldFd[1] != 0 ) + ::close( procManager->sigchldFd[1] ); + + // close also the sockets from other QProcess instances + for ( QProc *p=procManager->procList->first(); p!=0; p=procManager->procList->next() ) { + ::close( p->socketStdin ); + ::close( p->socketStdout ); + ::close( p->socketStderr ); + } + } +} + +void QProcessPrivate::newProc( pid_t pid, QProcess *process ) +{ + proc = new QProc( pid, process ); + if ( procManager == 0 ) { + procManager = new QProcessManager; + qAddPostRoutine(qprocess_cleanup); + } + // the QProcessManager takes care of deleting the QProc instances + procManager->append( proc ); +} + +/*********************************************************************** + * + * sigchld handler callback + * + **********************************************************************/ +QT_SIGNAL_RETTYPE qt_C_sigchldHnd( QT_SIGNAL_ARGS ) +{ + if ( QProcessPrivate::procManager == 0 ) + return; + if ( QProcessPrivate::procManager->sigchldFd[0] == 0 ) + return; + + char a = 1; + ::write( QProcessPrivate::procManager->sigchldFd[0], &a, sizeof(a) ); +} + + +/*********************************************************************** + * + * QProcess + * + **********************************************************************/ +/* + This private class does basic initialization. +*/ +void QProcess::init() +{ + d = new QProcessPrivate(); + exitStat = 0; + exitNormal = FALSE; +} + +/* + This private class resets the process variables, etc. so that it can be used + for another process to start. +*/ +void QProcess::reset() +{ + delete d; + d = new QProcessPrivate(); + exitStat = 0; + exitNormal = FALSE; + d->bufStdout.clear(); + d->bufStderr.clear(); +} + +QMembuf* QProcess::membufStdout() +{ + if ( d->proc && d->proc->socketStdout ) { + /* + Apparently, there is not consistency among different + operating systems on how to use FIONREAD. + + FreeBSD, Linux and Solaris all expect the 3rd argument to + ioctl() to be an int, which is normally 32-bit even on + 64-bit machines. + + IRIX, on the other hand, expects a size_t, which is 64-bit + on 64-bit machines. + + So, the solution is to use size_t initialized to zero to + make sure all bits are set to zero, preventing underflow + with the FreeBSD/Linux/Solaris ioctls. + */ + size_t nbytes = 0; + if ( ::ioctl(d->proc->socketStdout, FIONREAD, (char*)&nbytes)==0 && nbytes>0 ) + socketRead( d->proc->socketStdout ); + } + return &d->bufStdout; +} + +QMembuf* QProcess::membufStderr() +{ + if ( d->proc && d->proc->socketStderr ) { + /* + Apparently, there is not consistency among different + operating systems on how to use FIONREAD. + + FreeBSD, Linux and Solaris all expect the 3rd argument to + ioctl() to be an int, which is normally 32-bit even on + 64-bit machines. + + IRIX, on the other hand, expects a size_t, which is 64-bit + on 64-bit machines. + + So, the solution is to use size_t initialized to zero to + make sure all bits are set to zero, preventing underflow + with the FreeBSD/Linux/Solaris ioctls. + */ + size_t nbytes = 0; + if ( ::ioctl(d->proc->socketStderr, FIONREAD, (char*)&nbytes)==0 && nbytes>0 ) + socketRead( d->proc->socketStderr ); + } + return &d->bufStderr; +} + +/*! + Destroys the instance. + + If the process is running, it is <b>not</b> terminated! The + standard input, standard output and standard error of the process + are closed. + + You can connect the destroyed() signal to the kill() slot, if you + want the process to be terminated automatically when the instance + is destroyed. + + \sa tryTerminate() kill() +*/ +QProcess::~QProcess() +{ + delete d; +} + +/*! + Tries to run a process for the command and arguments that were + specified with setArguments(), addArgument() or that were + specified in the constructor. The command is searched for in the + path for executable programs; you can also use an absolute path in + the command itself. + + If \a env is null, then the process is started with the same + environment as the starting process. If \a env is non-null, then + the values in the stringlist are interpreted as environment + setttings of the form \c {key=value} and the process is started in + these environment settings. For convenience, there is a small + exception to this rule: under Unix, if \a env does not contain any + settings for the environment variable \c LD_LIBRARY_PATH, then + this variable is inherited from the starting process; under + Windows the same applies for the environment variable \c PATH. + + Returns TRUE if the process could be started; otherwise returns + FALSE. + + You can write data to the process's standard input with + writeToStdin(). You can close standard input with closeStdin() and + you can terminate the process with tryTerminate(), or with kill(). + + You can call this function even if you've used this instance to + create a another process which is still running. In such cases, + QProcess closes the old process's standard input and deletes + pending data, i.e., you lose all control over the old process, but + the old process is not terminated. This applies also if the + process could not be started. (On operating systems that have + zombie processes, Qt will also wait() on the old process.) + + \sa launch() closeStdin() +*/ +bool QProcess::start( QStringList *env ) +{ +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::start()" ); +#endif + reset(); + + int sStdin[2]; + int sStdout[2]; + int sStderr[2]; + + // open sockets for piping +#ifndef Q_OS_QNX6 + if ( (comms & Stdin) && ::socketpair( AF_UNIX, SOCK_STREAM, 0, sStdin ) == -1 ) { +#else + if ( (comms & Stdin) && qnx6SocketPairReplacement(sStdin) == -1 ) { +#endif + return FALSE; + } +#ifndef Q_OS_QNX6 + if ( (comms & Stderr) && ::socketpair( AF_UNIX, SOCK_STREAM, 0, sStderr ) == -1 ) { +#else + if ( (comms & Stderr) && qnx6SocketPairReplacement(sStderr) == -1 ) { +#endif + if ( comms & Stdin ) { + ::close( sStdin[0] ); + ::close( sStdin[1] ); + } + return FALSE; + } +#ifndef Q_OS_QNX6 + if ( (comms & Stdout) && ::socketpair( AF_UNIX, SOCK_STREAM, 0, sStdout ) == -1 ) { +#else + if ( (comms & Stdout) && qnx6SocketPairReplacement(sStdout) == -1 ) { +#endif + if ( comms & Stdin ) { + ::close( sStdin[0] ); + ::close( sStdin[1] ); + } + if ( comms & Stderr ) { + ::close( sStderr[0] ); + ::close( sStderr[1] ); + } + return FALSE; + } + + // the following pipe is only used to determine if the process could be + // started + int fd[2]; + if ( pipe( fd ) < 0 ) { + // non critical error, go on + fd[0] = 0; + fd[1] = 0; + } + + // construct the arguments for exec + QCString *arglistQ = new QCString[ _arguments.count() + 1 ]; + const char** arglist = new const char*[ _arguments.count() + 1 ]; + int i = 0; + for ( QStringList::Iterator it = _arguments.begin(); it != _arguments.end(); ++it ) { + arglistQ[i] = (*it).local8Bit(); + arglist[i] = arglistQ[i]; +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::start(): arg %d = %s", i, arglist[i] ); +#endif + i++; + } +#ifdef Q_OS_MACX + if(i) { + QCString arg_bundle = arglistQ[0]; + QFileInfo fi(arg_bundle); + if(fi.exists() && fi.isDir() && arg_bundle.right(4) == ".app") { + QCString exe = arg_bundle; + int lslash = exe.findRev('/'); + if(lslash != -1) + exe = exe.mid(lslash+1); + exe = QCString(arg_bundle + "/Contents/MacOS/" + exe); + exe = exe.left(exe.length() - 4); //chop off the .app + if(QFile::exists(exe)) { + arglistQ[0] = exe; + arglist[0] = arglistQ[0]; + } + } + } +#endif + arglist[i] = 0; + + // Must make sure signal handlers are installed before exec'ing + // in case the process exits quickly. + if ( d->procManager == 0 ) { + d->procManager = new QProcessManager; + qAddPostRoutine(qprocess_cleanup); + } + + // fork and exec + QApplication::flushX(); + pid_t pid = fork(); + if ( pid == 0 ) { + // child + d->closeOpenSocketsForChild(); + if ( comms & Stdin ) { + ::close( sStdin[1] ); + ::dup2( sStdin[0], STDIN_FILENO ); + } + if ( comms & Stdout ) { + ::close( sStdout[0] ); + ::dup2( sStdout[1], STDOUT_FILENO ); + } + if ( comms & Stderr ) { + ::close( sStderr[0] ); + ::dup2( sStderr[1], STDERR_FILENO ); + } + if ( comms & DupStderr ) { + ::dup2( STDOUT_FILENO, STDERR_FILENO ); + } +#ifndef QT_NO_DIR + ::chdir( workingDir.absPath().latin1() ); +#endif + if ( fd[0] ) + ::close( fd[0] ); + if ( fd[1] ) + ::fcntl( fd[1], F_SETFD, FD_CLOEXEC ); // close on exec shows sucess + + if ( env == 0 ) { // inherit environment and start process +#ifndef Q_OS_QNX4 + ::execvp( arglist[0], (char*const*)arglist ); // ### cast not nice +#else + ::execvp( arglist[0], (char const*const*)arglist ); // ### cast not nice +#endif + } else { // start process with environment settins as specified in env + // construct the environment for exec + int numEntries = env->count(); +#if defined(Q_OS_MACX) + QString ld_library_path("DYLD_LIBRARY_PATH"); +#else + QString ld_library_path("LD_LIBRARY_PATH"); +#endif + bool setLibraryPath = + env->grep( QRegExp( "^" + ld_library_path + "=" ) ).empty() && + getenv( ld_library_path ) != 0; + if ( setLibraryPath ) + numEntries++; + QCString *envlistQ = new QCString[ numEntries + 1 ]; + const char** envlist = new const char*[ numEntries + 1 ]; + int i = 0; + if ( setLibraryPath ) { + envlistQ[i] = QString( ld_library_path + "=%1" ).arg( getenv( ld_library_path ) ).local8Bit(); + envlist[i] = envlistQ[i]; + i++; + } + for ( QStringList::Iterator it = env->begin(); it != env->end(); ++it ) { + envlistQ[i] = (*it).local8Bit(); + envlist[i] = envlistQ[i]; + i++; + } + envlist[i] = 0; + + // look for the executable in the search path + if ( _arguments.count()>0 && getenv("PATH")!=0 ) { + QString command = _arguments[0]; + if ( !command.contains( '/' ) ) { + QStringList pathList = QStringList::split( ':', getenv( "PATH" ) ); + for (QStringList::Iterator it = pathList.begin(); it != pathList.end(); ++it ) { + QString dir = *it; +#if defined(Q_OS_MACX) //look in a bundle + if(!QFile::exists(dir + "/" + command) && QFile::exists(dir + "/" + command + ".app")) + dir += "/" + command + ".app/Contents/MacOS"; +#endif +#ifndef QT_NO_DIR + QFileInfo fileInfo( dir, command ); +#else + QFileInfo fileInfo( dir + "/" + command ); +#endif + if ( fileInfo.isExecutable() ) { +#if defined(Q_OS_MACX) + arglistQ[0] = fileInfo.absFilePath().local8Bit(); +#else + arglistQ[0] = fileInfo.filePath().local8Bit(); +#endif + arglist[0] = arglistQ[0]; + break; + } + } + } + } +#ifndef Q_OS_QNX4 + ::execve( arglist[0], (char*const*)arglist, (char*const*)envlist ); // ### casts not nice +#else + ::execve( arglist[0], (char const*const*)arglist,(char const*const*)envlist ); // ### casts not nice +#endif + } + if ( fd[1] ) { + char buf = 0; + ::write( fd[1], &buf, 1 ); + ::close( fd[1] ); + } + ::_exit( -1 ); + } else if ( pid == -1 ) { + // error forking + goto error; + } + + // test if exec was successful + if ( fd[1] ) + ::close( fd[1] ); + if ( fd[0] ) { + char buf; + for ( ;; ) { + int n = ::read( fd[0], &buf, 1 ); + if ( n==1 ) { + // socket was not closed => error + if ( ::waitpid( pid, 0, WNOHANG ) != pid ) { + // The wait did not succeed yet, so try again when we get + // the sigchild (to avoid zombies). + d->newProc( pid, 0 ); + } + d->proc = 0; + goto error; + } else if ( n==-1 ) { + if ( errno==EAGAIN || errno==EINTR ) + // try it again + continue; + } + break; + } + ::close( fd[0] ); + } + + d->newProc( pid, this ); + + if ( comms & Stdin ) { + ::close( sStdin[0] ); + d->proc->socketStdin = sStdin[1]; + + // Select non-blocking mode + int originalFlags = fcntl(d->proc->socketStdin, F_GETFL, 0); + fcntl(d->proc->socketStdin, F_SETFL, originalFlags | O_NONBLOCK); + + d->notifierStdin = new QSocketNotifier( sStdin[1], QSocketNotifier::Write ); + connect( d->notifierStdin, SIGNAL(activated(int)), + this, SLOT(socketWrite(int)) ); + // setup notifiers for the sockets + if ( !d->stdinBuf.isEmpty() ) { + d->notifierStdin->setEnabled( TRUE ); + } + } + if ( comms & Stdout ) { + ::close( sStdout[1] ); + d->proc->socketStdout = sStdout[0]; + d->notifierStdout = new QSocketNotifier( sStdout[0], QSocketNotifier::Read ); + connect( d->notifierStdout, SIGNAL(activated(int)), + this, SLOT(socketRead(int)) ); + if ( ioRedirection ) + d->notifierStdout->setEnabled( TRUE ); + } + if ( comms & Stderr ) { + ::close( sStderr[1] ); + d->proc->socketStderr = sStderr[0]; + d->notifierStderr = new QSocketNotifier( sStderr[0], QSocketNotifier::Read ); + connect( d->notifierStderr, SIGNAL(activated(int)), + this, SLOT(socketRead(int)) ); + if ( ioRedirection ) + d->notifierStderr->setEnabled( TRUE ); + } + + // cleanup and return + delete[] arglistQ; + delete[] arglist; + return TRUE; + +error: +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::start(): error starting process" ); +#endif + if ( d->procManager ) + d->procManager->cleanup(); + if ( comms & Stdin ) { + ::close( sStdin[1] ); + ::close( sStdin[0] ); + } + if ( comms & Stdout ) { + ::close( sStdout[0] ); + ::close( sStdout[1] ); + } + if ( comms & Stderr ) { + ::close( sStderr[0] ); + ::close( sStderr[1] ); + } + ::close( fd[0] ); + ::close( fd[1] ); + delete[] arglistQ; + delete[] arglist; + return FALSE; +} + + +/*! + Asks the process to terminate. Processes can ignore this if they + wish. If you want to be certain that the process really + terminates, you can use kill() instead. + + The slot returns immediately: it does not wait until the process + has finished. When the process terminates, the processExited() + signal is emitted. + + \sa kill() processExited() +*/ +void QProcess::tryTerminate() const +{ + if ( d->proc != 0 ) + ::kill( d->proc->pid, SIGTERM ); +} + +/*! + Terminates the process. This is not a safe way to end a process + since the process will not be able to do any cleanup. + tryTerminate() is safer, but processes can ignore a + tryTerminate(). + + The nice way to end a process and to be sure that it is finished, + is to do something like this: + \code + process->tryTerminate(); + QTimer::singleShot( 5000, process, SLOT( kill() ) ); + \endcode + + This tries to terminate the process the nice way. If the process + is still running after 5 seconds, it terminates the process the + hard way. The timeout should be chosen depending on the time the + process needs to do all its cleanup: use a higher value if the + process is likely to do a lot of computation or I/O on cleanup. + + The slot returns immediately: it does not wait until the process + has finished. When the process terminates, the processExited() + signal is emitted. + + \sa tryTerminate() processExited() +*/ +void QProcess::kill() const +{ + if ( d->proc != 0 ) + ::kill( d->proc->pid, SIGKILL ); +} + +/*! + Returns TRUE if the process is running; otherwise returns FALSE. + + \sa normalExit() exitStatus() processExited() +*/ +bool QProcess::isRunning() const +{ + if ( d->exitValuesCalculated ) { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::isRunning(): FALSE (already computed)" ); +#endif + return FALSE; + } + if ( d->proc == 0 ) + return FALSE; + int status; + if ( ::waitpid( d->proc->pid, &status, WNOHANG ) == d->proc->pid ) { + // compute the exit values + QProcess *that = (QProcess*)this; // mutable + that->exitNormal = WIFEXITED( status ) != 0; + if ( exitNormal ) { + that->exitStat = (char)WEXITSTATUS( status ); + } + d->exitValuesCalculated = TRUE; + + // On heavy processing, the socket notifier for the sigchild might not + // have found time to fire yet. + if ( d->procManager && d->procManager->sigchldFd[1] < FD_SETSIZE ) { + fd_set fds; + struct timeval tv; + FD_ZERO( &fds ); + FD_SET( d->procManager->sigchldFd[1], &fds ); + tv.tv_sec = 0; + tv.tv_usec = 0; + if ( ::select( d->procManager->sigchldFd[1]+1, &fds, 0, 0, &tv ) > 0 ) + d->procManager->sigchldHnd( d->procManager->sigchldFd[1] ); + } + +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::isRunning() (PID: %d): FALSE", d->proc->pid ); +#endif + return FALSE; + } +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::isRunning() (PID: %d): TRUE", d->proc->pid ); +#endif + return TRUE; +} + +/*! + Returns TRUE if it's possible to read an entire line of text from + standard output at this time; otherwise returns FALSE. + + \sa readLineStdout() canReadLineStderr() +*/ +bool QProcess::canReadLineStdout() const +{ + if ( !d->proc || !d->proc->socketStdout ) + return d->bufStdout.size() != 0; + + QProcess *that = (QProcess*)this; + return that->membufStdout()->scanNewline( 0 ); +} + +/*! + Returns TRUE if it's possible to read an entire line of text from + standard error at this time; otherwise returns FALSE. + + \sa readLineStderr() canReadLineStdout() +*/ +bool QProcess::canReadLineStderr() const +{ + if ( !d->proc || !d->proc->socketStderr ) + return d->bufStderr.size() != 0; + + QProcess *that = (QProcess*)this; + return that->membufStderr()->scanNewline( 0 ); +} + +/*! + Writes the data \a buf to the process's standard input. The + process may or may not read this data. + + This function always returns immediately. The data you + pass to writeToStdin() is copied into an internal memory buffer in + QProcess, and when control goes back to the event loop, QProcess will + starting transferring data from this buffer to the running process. + Sometimes the data will be transferred in several payloads, depending on + how much data is read at a time by the process itself. When QProcess has + transferred all the data from its memory buffer to the running process, it + emits wroteToStdin(). + + Note that some operating systems use a buffer to transfer + the data. As a result, wroteToStdin() may be emitted before the + running process has actually read all the data. + + \sa wroteToStdin() closeStdin() readStdout() readStderr() +*/ +void QProcess::writeToStdin( const QByteArray& buf ) +{ +#if defined(QT_QPROCESS_DEBUG) +// qDebug( "QProcess::writeToStdin(): write to stdin (%d)", d->socketStdin ); +#endif + d->stdinBuf.enqueue( new QByteArray(buf) ); + if ( d->notifierStdin != 0 ) + d->notifierStdin->setEnabled( TRUE ); +} + + +/*! + Closes the process's standard input. + + This function also deletes any pending data that has not been + written to standard input. + + \sa wroteToStdin() +*/ +void QProcess::closeStdin() +{ + if ( d->proc == 0 ) + return; + if ( d->proc->socketStdin !=0 ) { + while ( !d->stdinBuf.isEmpty() ) { + delete d->stdinBuf.dequeue(); + } + delete d->notifierStdin; + d->notifierStdin = 0; + if ( ::close( d->proc->socketStdin ) != 0 ) { + qWarning( "Could not close stdin of child process" ); + } +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::closeStdin(): stdin (%d) closed", d->proc->socketStdin ); +#endif + d->proc->socketStdin = 0; + } +} + + +/* + This private slot is called when the process has outputted data to either + standard output or standard error. +*/ +void QProcess::socketRead( int fd ) +{ + if ( d->socketReadCalled ) { + // the slots that are connected to the readyRead...() signals might + // trigger a recursive call of socketRead(). Avoid this since you get a + // blocking read otherwise. + return; + } + +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::socketRead(): %d", fd ); +#endif + if ( fd == 0 ) + return; + if ( !d->proc ) + return; + QMembuf *buffer = 0; + int n; + if ( fd == d->proc->socketStdout ) { + buffer = &d->bufStdout; + } else if ( fd == d->proc->socketStderr ) { + buffer = &d->bufStderr; + } else { + // this case should never happen, but just to be safe + return; + } +#if defined(QT_QPROCESS_DEBUG) + uint oldSize = buffer->size(); +#endif + + // try to read data first (if it fails, the filedescriptor was closed) + const int basize = 4096; + QByteArray *ba = new QByteArray( basize ); + n = ::read( fd, ba->data(), basize ); + if ( n > 0 ) { + ba->resize( n ); + buffer->append( ba ); + ba = 0; + } else { + delete ba; + ba = 0; + } + // eof or error? + if ( n == 0 || n == -1 ) { + if ( fd == d->proc->socketStdout ) { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::socketRead(): stdout (%d) closed", fd ); +#endif + d->notifierStdout->setEnabled( FALSE ); + delete d->notifierStdout; + d->notifierStdout = 0; + ::close( d->proc->socketStdout ); + d->proc->socketStdout = 0; + return; + } else if ( fd == d->proc->socketStderr ) { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::socketRead(): stderr (%d) closed", fd ); +#endif + d->notifierStderr->setEnabled( FALSE ); + delete d->notifierStderr; + d->notifierStderr = 0; + ::close( d->proc->socketStderr ); + d->proc->socketStderr = 0; + return; + } + } + + if ( fd < FD_SETSIZE ) { + fd_set fds; + struct timeval tv; + FD_ZERO( &fds ); + FD_SET( fd, &fds ); + tv.tv_sec = 0; + tv.tv_usec = 0; + while ( ::select( fd+1, &fds, 0, 0, &tv ) > 0 ) { + // prepare for the next round + FD_ZERO( &fds ); + FD_SET( fd, &fds ); + // read data + ba = new QByteArray( basize ); + n = ::read( fd, ba->data(), basize ); + if ( n > 0 ) { + ba->resize( n ); + buffer->append( ba ); + ba = 0; + } else { + delete ba; + ba = 0; + break; + } + } + } + + d->socketReadCalled = TRUE; + if ( fd == d->proc->socketStdout ) { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::socketRead(): %d bytes read from stdout (%d)", + buffer->size()-oldSize, fd ); +#endif + emit readyReadStdout(); + } else if ( fd == d->proc->socketStderr ) { +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::socketRead(): %d bytes read from stderr (%d)", + buffer->size()-oldSize, fd ); +#endif + emit readyReadStderr(); + } + d->socketReadCalled = FALSE; +} + + +/* + This private slot is called when the process tries to read data from standard + input. +*/ +void QProcess::socketWrite( int fd ) +{ + while ( fd == d->proc->socketStdin && d->proc->socketStdin != 0 ) { + if ( d->stdinBuf.isEmpty() ) { + d->notifierStdin->setEnabled( FALSE ); + return; + } + ssize_t ret = ::write( fd, + d->stdinBuf.head()->data() + d->stdinBufRead, + d->stdinBuf.head()->size() - d->stdinBufRead ); +#if defined(QT_QPROCESS_DEBUG) + qDebug( "QProcess::socketWrite(): wrote %d bytes to stdin (%d)", ret, fd ); +#endif + if ( ret == -1 ) + return; + d->stdinBufRead += ret; + if ( d->stdinBufRead == (ssize_t)d->stdinBuf.head()->size() ) { + d->stdinBufRead = 0; + delete d->stdinBuf.dequeue(); + if ( wroteToStdinConnected && d->stdinBuf.isEmpty() ) + emit wroteToStdin(); + } + } +} + +/*! + \internal + Flushes standard input. This is useful if you want to use QProcess in a + synchronous manner. + + This function should probably go into the public API. +*/ +void QProcess::flushStdin() +{ + if (d->proc) + socketWrite(d->proc->socketStdin); +} + +/* + This private slot is only used under Windows (but moc does not know about #if + defined()). +*/ +void QProcess::timeout() +{ +} + + +/* + This private function is used by connectNotify() and disconnectNotify() to + change the value of ioRedirection (and related behaviour) +*/ +void QProcess::setIoRedirection( bool value ) +{ + ioRedirection = value; + if ( ioRedirection ) { + if ( d->notifierStdout ) + d->notifierStdout->setEnabled( TRUE ); + if ( d->notifierStderr ) + d->notifierStderr->setEnabled( TRUE ); + } else { + if ( d->notifierStdout ) + d->notifierStdout->setEnabled( FALSE ); + if ( d->notifierStderr ) + d->notifierStderr->setEnabled( FALSE ); + } +} + +/* + This private function is used by connectNotify() and + disconnectNotify() to change the value of notifyOnExit (and related + behaviour) +*/ +void QProcess::setNotifyOnExit( bool value ) +{ + notifyOnExit = value; +} + +/* + This private function is used by connectNotify() and disconnectNotify() to + change the value of wroteToStdinConnected (and related behaviour) +*/ +void QProcess::setWroteStdinConnected( bool value ) +{ + wroteToStdinConnected = value; +} + +/*! \enum QProcess::PID + \internal +*/ +/*! + Returns platform dependent information about the process. This can + be used together with platform specific system calls. + + Under Unix the return value is the PID of the process, or -1 if no + process belongs to this object. + + Under Windows it is a pointer to the \c PROCESS_INFORMATION + struct, or 0 if no process is belongs to this object. + + Use of this function's return value is likely to be non-portable. +*/ +QProcess::PID QProcess::processIdentifier() +{ + if ( d->proc == 0 ) + return -1; + return d->proc->pid; +} + +#endif // QT_NO_PROCESS |