void executePipe(char** args, int isBackground, int pgid){
setpgid(getpid(), pgid);
if(!isProperPipe(args)){ //Error!
printf("Error: Malformed pipe command.\n");
exit(-1);
}
int status;
int numOfPipes = 1;
char** buffer = NULL;
LinkedList* arguments= getPipeQueue(args);
//Get boths sides of pipe
char** leftSide = LinkedList_next(arguments);
LinkedList_next(arguments);
char** rightSide = LinkedList_next(arguments);
//Check for errors
if(isRedirection(rightSide)){
if(!isProperRedirection(rightSide)){
printf("Error: Malformed redirection command.\n");
exit(-1);
}
}
if(isRedirection(leftSide)){
if(!isProperRedirection(leftSide)){
printf("Error: Malformed redirection command.\n");
exit(-1);
}
}
//Make pipe
int fd[2];
pipe(fd);
int pid = fork();
if (pid == -1) {
perror("fork");
exit(EXIT_FAILURE);
}
if (!pid){
close(fd[1]);
dup2(fd[0], STDOUT_FILENO);
if(isRedirection(leftSide)){
executeRedirection(leftSide, isBackground);
}else{
execvp(leftSide[0], leftSide);
}
exit(0);
}else{
close(fd[0]);
waitpid(pid, &status, 0);
dup2(fd[1], STDIN_FILENO);
if(isRedirection(rightSide)){
executeRedirection(rightSide, isBackground);
}else{
execvp(rightSide[0], rightSide);
}
exit(0);
}
}
void commandDecider (CMD_t *inputCommand)
{
char *commandName = inputCommand -> argv[0];
if (ifRedirection (inputCommand))
{
// Send to Redirection
executeRedirection (inputCommand);
return;
}
if (ifPiping (inputCommand))
{
// Send to Piping
executePiping (inputCommand);
return;
}
if (ifReturn (inputCommand))
{
// Don't do anything
return;
}
if (!strcmp (commandName, "help"))
{
// Send to help
executeHelp (inputCommand);
return;
}
if (!strcmp (commandName, "clear"))
{
// Send to clear
executeClear (inputCommand);
return;
}
if (!strcmp (commandName, "pwd"))
{
// Send to pwd
showPWD ();
return;
}
if (!strcmp (commandName, "ls"))
{
// Send to ls
executeLS (inputCommand);
return;
}
if (!strcmp (commandName, "whoami"))
{
// Send to whoami
showWhoami ();
return;
}
if (!strcmp (commandName, "cd"))
{
// Send to cd
executeCD (inputCommand);
return;
}
if (!strcmp (commandName, "pid"))
{
// Send to pid
executePID (inputCommand);
return;
}
if (!strcmp (commandName, "history"))
{
// Send to history
executeHistory (inputCommand);
return;
}
if (!strcmp (commandName, "kill"))
{
// Send to kill
executeKill (inputCommand);
return;
}
if (!strcmp (commandName, "exit"))
{
clearHistory ();
exit (0);
}
printf ("ERROR: INVALID_COMMAND :: \"%s\" is not a recognised command.. Type \"help\" for more information\n", commandName);
return;
}
