void Xmpp_client::file_received (QXmppTransferJob *job)
{
qDebug() << "Xmpp_client::file_received";
qDebug() << "Got transfer request from:" << job->jid();
bool check = connect(job, SIGNAL(error(QXmppTransferJob::Error)), this, SLOT(job_error(QXmppTransferJob::Error)));
Q_ASSERT(check);
check = connect(job, SIGNAL(finished()), this, SLOT(job_finished()));
Q_ASSERT(check);
check = connect(job, SIGNAL(progress(qint64,qint64)), this, SLOT(job_progress(qint64,qint64)));
Q_ASSERT(check);
// allocate a buffer to receive the file
m_buffer = new QBuffer(this);
m_buffer->open(QIODevice::WriteOnly);
job->accept(m_buffer);
}
// handler for all of the signals (SIGCHLD, SIGINT, SIGTSTP)
void child_signal_handler(int signum, siginfo_t* siginfo, void* extra){
if(signum == SIGCHLD){
int status, ch_pid;
ch_pid = waitpid(-1, &status, WNOHANG | WUNTRACED | WCONTINUED);
if(ch_pid > 0){
if(ch_pid == pipe_pid){
pipe_pid = 0;
}
//find which subjob(process) and which job this child process belongs to.
job* this_job = find_job_pid(ch_pid, jlist);
subjob* this_subjob = find_subjob(this_job, ch_pid);
//handle each case of status change
if(WIFEXITED(status)){
this_subjob->finished = 1; // if subjob exited normally
if(job_finished(this_job)){
if(ch_pid == fg_pid){
fg_pid = 0; // if child process exited is a foreground job, reset
if(tcsetpgrp(STDIN_FILENO, getpgid(0)) == -1){
perror("tcsetpgrp error 1");
}
}
else{ //if ch_pid was a background job
message_q = add(message_q, "\n");
message_q = add(message_q, this_job->command);
message_q = add(message_q, "Finished: ");
}
delete_job(this_job, jlist);
}
}
else if(WIFSIGNALED(status)){
if(ch_pid == fg_pid){
fg_pid = 0;
if(tcsetpgrp(STDIN_FILENO, getpgid(0)) == -1){
perror("tcsetpgrp error");
}
}
delete_job(this_job, jlist); //delete corresponding job
}
else if(WIFSTOPPED(status)){
if(ch_pid == fg_pid){
fg_pid = 0;
if(tcsetpgrp(STDIN_FILENO, getpgid(ch_pid)) == -1){
perror("tcsetpgrp error 3");
}
}
this_subjob->stopped = 1; // set the stopped boolean to TRUE
if(job_stopped(this_job)){
message_q = add(message_q, "\n"); // add stopped prompt to message q
message_q = add(message_q, this_job->command);
message_q = add(message_q, "Stopped: ");
update_orders(jlist, this_job); // update ranking of most recent jobs
}
}
else if(WIFCONTINUED(status)){//restart the stopped process
this_subjob->stopped = 0;
if(!job_stopped(this_job)){
update_orders(jlist, this_job); // update order of jobs in job_list
}
if(fg_pid){
if(tcsetpgrp(STDIN_FILENO, fg_pid) == -1){
perror("tcsetpgrp error 5");
}
}
else{
}
}
ch_pid = waitpid(-1, &status, WNOHANG | WUNTRACED | WCONTINUED); // wait
}
}
if(signum == SIGINT){
//ctrl-C
//if the signal is coming from the main shell, exit the shell.
if(sh_pgid == getpgid(siginfo->si_pid)){
if(fg_pid){
killpg(getpgid(fg_pid), SIGINT); // kill fg process with SIGINT
}
}
else{
killpg(0, SIGTERM);
}
}
if(signum == SIGTSTP){
if(sh_pgid == getpgid(siginfo->si_pid)){
if(fg_pid){
killpg(getpgid(fg_pid), SIGTSTP); // kill fg process with SIGTSTP
}
}
else{
killpg(0, SIGSTOP);
}
}
}