void RunCmd(commandT** cmd, int n)
{
int i;
total_task = n;
if(n == 1) {
if ((cmd[0]->is_redirect_in) || (cmd[0]->is_redirect_out)) {
RunCmdRedirInOut(cmd[0]);
} else {
RunCmdFork(cmd[0], TRUE);
}
}
else {
RunCmdPipe(cmd[0], cmd[1]);
for(i = 0; i < n; i++)
ReleaseCmdT(&cmd[i]);
}
}
static void RunBuiltInCmd(commandT* cmd)
{
int status;
sigset_t mask;
sigemptyset(&mask);
sigaddset(&mask,SIGCHLD);
int pid=fork();
if(pid == 0)
{
if ((cmd->is_redirect_in==1) && (cmd->is_redirect_out==1)){
RunCmdRedirInOut(cmd,cmd->redirect_in,cmd->redirect_out);
}else if (cmd->is_redirect_in==1){
RunCmdRedirIn(cmd,cmd->redirect_in);
}else if(cmd->is_redirect_out==1){
RunCmdRedirOut(cmd,cmd->redirect_out);
}
setpgid(0, 0);
execv(cmd->name , cmd->argv);
}else if(pid < 0)
perror("Fork Error, in RunBuiltInCmd");
else {
{
if(cmd[0].bg==0){
fgpid = pid;
waitpid(pid,&status,WUNTRACED);
if(WTERMSIG(status) == 127){
// stopped by SIGTSTP
fgpid=-1;
//add it to backbground
addToBg(pid,cmd,2);
}
return;
}else if (cmd[0].bg==1){
sigprocmask(SIG_UNBLOCK,&mask,NULL);
//run command background
//add the bg process to the bgjoblist
addToBg(pid,cmd,0);
}
}
}
}
