bool historymanager::addhistory(QWebHistory * history)
{
for(int i = 0;i < history->count();i++)
{
const QWebHistoryItem item = history->itemAt(i);
addhistory(item.title() , item.url().toString() , item.lastVisited());
}
return true;
}
webview::webview(QWidget *parent) :
QWebView(parent)
{
setAttribute(Qt::WA_DeleteOnClose);
settings()->setAttribute(QWebSettings::DnsPrefetchEnabled , true);
settings()->setAttribute(QWebSettings::JavascriptCanOpenWindows , true);
settings()->setAttribute(QWebSettings::JavascriptCanCloseWindows , true);
settings()->setAttribute(QWebSettings::JavascriptCanAccessClipboard , true);
settings()->setAttribute(QWebSettings::DeveloperExtrasEnabled , true);
settings()->setAttribute(QWebSettings::LocalStorageEnabled , true);
settings()->setAttribute(QWebSettings::JavaEnabled , true);
settings()->setAttribute(QWebSettings::LocalStorageEnabled , true);
settings()->enablePersistentStorage(QApplication::applicationDirPath());
QObject::connect(this , SIGNAL(urlChanged(QUrl)) , this , SLOT(addhistory(QUrl)));
QObject::connect(this , SIGNAL(titleChanged(QString)) , this , SLOT(updatetitle(QString)));
}
int main()
{
int status;
// command variable
char *args[20];
int i;
for (i = 0; i < 20; ++i)
{
args[i] = NULL;
}
// background variable
int bg;
// history variables
int historynbr = 1;
int *toBeSaved = mmap(NULL, sizeof(int), PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
struct cmd **history = mmap(NULL, sizeof(struct cmd), PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
int notInitialized = 1;
while(notInitialized) {
int i;
for (i = 0; i < 10; i++) {
history[i] = (struct cmd*) malloc(sizeof(struct cmd));
}
notInitialized = 0;
}
// job variable
struct job * head = NULL;
printf("\n-----------------------------------------\nWelcome!\nThis is a simple shell. \nEnter 'help' for more info.\n-----------------------------------------\n\n");
while (1) {
int cnt = getcmd("\n>> ", args, &bg);
// int i;
// for (i = 0; i < cnt; i++)
// printf("\nArg[%d] = %s", i, args[i]);
// if (bg)
// printf("\nBackground enabled..\n");
// else
// printf("\nBackground not enabled \n");
printf("\n");
/**********************************/
/******** INTERNAL COMMAND ********/
/**********************************/
// HISTORY
if (cnt != 0 && isnumber(args[0])) {
int nbr = stringtoint(args[0]);
*toBeSaved = 0;
// find the index of the command in the history, if it is there
int index = searchhistory(history, nbr);
if (index == -1){
printf("***ERROR command ID '%s' does not exist\n\n", args[0]);
}
else {
int j;
for (j = 0; j < 20; j++) {
args[j] = history[index]->args[j];
}
//check is it was in backgorund
int bgIndex;
if ((bgIndex = isbg(args)) > 0) {
bg = 1;
args[bgIndex] = NULL;
}
}
}
// if nothing is entered
if(cnt == 0){
// do nothing
}
// HELP
else if (strcmp(args[0], "help") == 0){
printf("This is a simple shell brought to you by Felix Dube\n\nIt keeps the last 10 commands in HISTORY.\nEnter 'history' to see the list of commands in history.\n\nProcess can be run un BACKGROUND using the '&' argument.\nEnter 'jobs' to see the list of process running in background\nEnter 'fg' and the process job number to bring a process in the forground.\n\n");
}
// PRINT HISTORY
else if (strcmp(args[0], "history") == 0) {
printhistory(history);
initargs(args);
}
// PRESENT WORKING DIRECTORY
else if( strcmp(args[0], "pwd") == 0) {
char* cwd;
char buff[PATH_MAX + 1];
cwd = getcwd( buff, PATH_MAX + 1 );
if( cwd != NULL ) {
printf( "My working directory is %s.\n", cwd );
}
addhistory(history, args, historynbr);
historynbr++;
initargs(args);
}
// CHANGE DIRECTORY
else if( strcmp(args[0], "cd") == 0 ){
chdir(args[1]);
addhistory(history, args, historynbr);
historynbr++;
initargs(args);
}
// JOBS
else if( strcmp(args[0], "jobs") == 0) {
printjobs(&head);
addhistory(history, args, historynbr);
historynbr++;
initargs(args);
}
// FOREGROUND
else if( strcmp(args[0], "fg") == 0) {
addhistory(history, args, historynbr);
historynbr++;
if (jobexist(head, stringtoint(args[1]))){
waitpid(stringtoint(args[1]), &status, 0);
}
else{
printf("***ERROR job PID '%s' does not exist\n\n", args[1]);
}
initargs(args);
}
// EXIT
else if ( strcmp(args[0], "exit") == 0){
exit(0);
}
/**********************************/
/******** EXTERNAL COMMAND ********/
/**********************************/
else if (cnt != 0) {
*toBeSaved = 1;
pid_t pid = fork();
/**** PARENT ****/
// the parent process either wait for the child process or not
// depending if the command is executed in background or not
if ( pid != 0 ) {
if (bg) {
pushjob(&head, pid, args);
// save the cmd if it was valid and not already in the history
if(*toBeSaved){
int i = 0;
while(args[i] != NULL){
i++;
}
args[i] = "&";
addhistory(history, args, historynbr);
historynbr++;
}
initargs(args);
}
else {
waitpid(pid, &status, 0);
// save the cmd if it was valid and not already in the history
if(*toBeSaved){
addhistory(history, args, historynbr);
historynbr++;
}
initargs(args);
}
}
/**** CHILD ****/
// the command is exucuted in the child process
else {
if (cnt != 0 && isnumber(args[0])){
exit(0);
}
// change the output of the process when specified (eg. ls > out.txt)
int argNbr;
if ((argNbr = isredirected(args)) > 0){
freopen(args[argNbr+1], "w", stdout);
args[argNbr] = NULL;
args[argNbr+1] = NULL;
}
// execute the command and make sure it is valid
if (execvp(args[0], args) == -1) {
*toBeSaved = 0;
printf("***ERROR invalid command\n");
}
}
}
}
}
bool historymanager::addhistory(QString title, QString url)
{
return addhistory(title , url , QDateTime::currentDateTime());
}
