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process.cpp
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process.cpp
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/*
* This module file defines the methods of the process_t class for use in
* starting sub-processes and reading and writing to their stdin, stdout,
* and stderr file descriptors.
*/
#include "process.h"
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <linux/input.h>
#include <dirent.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <signal.h>
childProcess_t::childProcess_t (process_t * parent)
: QProcess(parent)
{
QObject::connect(this, SIGNAL(error (QProcess::ProcessError)), this, SLOT(error (QProcess::ProcessError)));
QObject::connect(this, SIGNAL(finished (int, QProcess::ExitStatus)), this, SLOT(finished (int, QProcess::ExitStatus)));
QObject::connect(this, SIGNAL(readyReadStandardError(void)), this, SLOT(readyReadStandardError(void)));
QObject::connect(this, SIGNAL(readyReadStandardOutput(void)), this, SLOT(readyReadStandardOutput(void)));
QObject::connect(this, SIGNAL(started (void)), this, SLOT(started (void)));
QObject::connect(this, SIGNAL(stateChanged(QProcess::ProcessState)), this, SLOT(stateChanged(QProcess::ProcessState)));
QObject::connect(this, SIGNAL(bytesWritten(qint64)), this, SLOT(bytesWritten(qint64)));
}
childProcess_t::~childProcess_t ()
{
printf("%s\n", __PRETTY_FUNCTION__ );
}
void childProcess_t::error (QProcess::ProcessError error)
{
printf("%s: %d\n", __PRETTY_FUNCTION__, error );
}
void childProcess_t::finished (int exitCode, QProcess::ExitStatus exitStatus)
{
printf("%s: %d.%d\n", __PRETTY_FUNCTION__, exitCode, exitStatus );
((process_t *)parent())->finished(this,exitCode);
delete this ;
}
void childProcess_t::readyReadStandardError()
{
((process_t *)parent())->fdReady(this,fileno(stderr));
}
void childProcess_t::readyReadStandardOutput()
{
((process_t *)parent())->fdReady(this,fileno(stdout));
}
void childProcess_t::started ()
{
saved_pid = pid();
// printf("%s: pid %lld\n", __PRETTY_FUNCTION__, saved_pid );
((process_t *)parent())->started(this);
}
void childProcess_t::stateChanged ( QProcess::ProcessState newState )
{
// printf("%s: %d\n", __PRETTY_FUNCTION__, newState );
}
void childProcess_t::bytesWritten( qint64 count)
{
// printf( "%s: %lld\n", __PRETTY_FUNCTION__, count);
}
process_t::process_t()
{
}
process_t::~process_t()
{
}
void process_t::shutdown()
{
while (!processes.empty()) {
QMap<Q_PID,childProcess_t *>::iterator it = processes.begin();
::kill((*it)->pid(), SIGHUP);
sleep(1);
(*it)->kill();
processes.erase(it);
}
}
void process_t::readData(int fd)
{
}
QString process_t::popen(QString cmdline)
{
QByteArray s ;
s.reserve(0x1000);
QByteArray ascii = cmdline.toAscii();
FILE *fproc = ::popen(ascii.constData(), "r");
if (fproc) {
char inbuf[2048];
int numRead ;
while (0 < (numRead=fread(inbuf,1,sizeof(inbuf)-1,fproc))) {
s.append(inbuf,numRead);
}
fclose(fproc);
} else
fprintf(stderr, "%s:%m\n", ascii.constData());
return s ;
}
int process_t::start(QString program, QStringList args)
{
childProcess_t *child = new childProcess_t(this);
child->start(program,args);
if (child->waitForStarted()) {
processes[child->pid()] = child ;
return child->pid();
} else {
fprintf(stderr, "Error %m starting %s\n", program.toAscii().constData());
}
return -1 ;
}
int process_t::start(QString program)
{
childProcess_t *child = new childProcess_t(this);
child->start(program);
if (child->waitForStarted()) {
processes[child->pid()] = child ;
return child->pid();
} else {
fprintf(stderr, "Error %m starting %s\n", program.toAscii().constData());
}
return -1 ;
}
bool process_t::stop(int pid)
{
QMap<Q_PID,childProcess_t *>::const_iterator it = processes.find(pid);
if (it != processes.end()) {
(*it)->kill();
} else {
printf("%s: process %d not found\n", __PRETTY_FUNCTION__, pid);
}
return false ;
}
QString process_t::read(int pid, int fd)
{
QMap<Q_PID,childProcess_t *>::const_iterator it = processes.find(pid);
if (it != processes.end()) {
if (1 == fd) {
return (*it)->readAllStandardOutput();
} else if (2 == fd) {
return (*it)->readAllStandardError();
}
}
return QString();
}
int process_t::write(int pid,QString s)
{
int rval = -1 ;
QMap<Q_PID,childProcess_t *>::const_iterator it = processes.find(pid);
if (it != processes.end()) {
rval = (*it)->write(s.toAscii());
}
return rval;
}
Q_INVOKABLE int process_t::close_write(int pid)
{
int rval = -1 ;
QMap<Q_PID,childProcess_t *>::const_iterator it = processes.find(pid);
if (it != processes.end()) {
(*it)->closeWriteChannel();
rval = 0 ;
}
return rval;
}
void process_t::started(childProcess_t *child)
{
QMap<Q_PID,childProcess_t *>::const_iterator it = processes.find(child->getpid());
if (it == processes.end()) {
processes.insert(child->getpid(),child);
printf ("%s: process %lld added to map\n", __PRETTY_FUNCTION__, child->getpid());
} else {
printf ("%s: duplicate process %lld\n", __PRETTY_FUNCTION__, child->getpid());
}
}
void process_t::finished(childProcess_t *child,int exitStat)
{
QMap<Q_PID,childProcess_t *>::iterator it = processes.find(child->getpid());
if (it != processes.end()) {
processes.erase(it);
printf ("%s: process %lld finished\n", __PRETTY_FUNCTION__, child->getpid());
emit onExit(child->getpid(), exitStat);
} else {
printf ("%s: process %lld not found\n", __PRETTY_FUNCTION__, child->getpid());
}
}
void process_t::fdReady(childProcess_t *child, int fd) {
emit onInput((int)child->getpid(), fd);
}
void process_t::exit(int retval) {
shutdown();
QApplication::instance()->exit(retval);
}
QStringList process_t::arguments(void)
{
return QApplication::arguments();
}