int main(){
int status;
//read line of words
char** line = readLineOfWords();
TokenNode **tokens;
while (line != NULL)
{
int pid = fork();
bool isBackground = isBackgroundProcess(line);
if (pid == 0){
tokens = getStartNode(line);
}
if (isBackground){
if (pid == 0){
processLineOfTokens(tokens);
}
}else{
if (pid == 0){
processLineOfTokens(tokens);
}else{
int status;
waitpid(pid,&status,0);
}
}
line = readLineOfWords();
}
return 0;
}
int main()
{
printf("enter a shell command (e.g. ls): ");
fflush(stdout);
char** words = readLineOfWords();
// prints the tokens in the array separated by spaces
int i=0;
printf("\nyou entered: ");
while (words[i] != NULL) {
printf("%s ", words[i++]);
}
printf("\n\n");
// execute command in words[0] with arguments in array words
// by convention first argument is command itself, last argument must be NULL
char** newword = (char**) malloc( 3 * sizeof(char*) );
newword[0] = "ls";
newword[1] = "-a";
execvp(words[0], newword);
// execvp replaces current process so should never get here!
printf( "Will this get printed? No.\n" );
return 0;
}
