/******************************************************
Tries to execute the job and then wait for it
to finish running.
POST: Returns true if the job was successfully started
and finished running. Returns false if there
was an error.
*/
void PipeManager::execute() {
// create arrays to pass to pipe system call
createPipes();
// create last child first
if (!createLastChild())
return;
// create all middle children in reverse order
int num_middle_children = my_command.getCommands().size() - 2; // - 2 because we're doing first and last separately
for (int childCtr = num_middle_children; childCtr > 0; childCtr--) {
if (!createMiddleChild(childCtr))
return;
}
if (!createFirstChild())
return;
// must be in parent now, close pipes and wait for children
closePipes();
waitForChildren();
deletePipes();
return;
}
int main()
{
//Create children pipes
char * children[2];
children[0]="link1";
children[1]="link2";
int size = 2;
makePipes(children,size);
char * message = (char *)calloc(MAX_BUF, sizeof(char));;
char*charPacket = calloc(MAX_BUF,sizeof(char));
char * toSend = (char *)calloc(MAX_BUF, sizeof(char));
int running = 1;
while(running){
printf("Enter your file and node to send to eg. test.txt n4\n");
fgets(message, sizeof(char)*MAX_BUF, stdin);
if(message[strlen(message)-1]=='\n'){
message[strlen(message)-1]='\0';
}
char*file = strtok(message," ");
char*toNode = strtok(NULL," ");
if(toNode!=NULL){
charPacket[0]=' ';
for(int i=0;i<strlen(toNode);i++){
charPacket[i+1]=toNode[i];
charPacket[i+2]='\n';
charPacket[i+3]='\0';
}
FILE * fd = fopen(file, "r");
if(fd!=NULL){
while(fgets(toSend, MAX_BUF, fd)!=NULL ) {
for(int j=0;j<strlen(toSend);j++){
charPacket[0]=toSend[j];
//printf("HERE:::::%s\n", charPacket);
//Send message to child nodes
for(int i=0;i<size;i++){
sendMessage(charPacket, children[i]);
}
//Receive done message from child nodes
for(int i=0;i<size;i++){
char * recMessage = getMessage(children[i]);
free(recMessage);
}
}
}
}else{
printf("Invalid File\n");
}
}else{
printf("Invalid Input\n");
}
printf("Do you want to continue(Y/N)?\n");
fgets(message, sizeof(char)*MAX_BUF, stdin);
if(message[strlen(message)-1]=='\n'){
message[strlen(message)-1]='\0';
}
//Quit once all children are closed
if(strcmp(message, "N")==0||strcmp(message, "n")==0){
for(int i=0;i<size;i++){
sendMessage("q", children[i]);
}
//Receive done message from child nodes
for(int i=0;i<size;i++){
char * recMessage = getMessage(children[i]);
free(recMessage);
}
running=0;
}
}
free(message);
free(charPacket);
free(toSend);
deletePipes(children,size);
return 0;
}
