static void parseArguments(parsed p, char *input) {
char **argv;
char *arg;
char *line;
char *s;
int i;
int segments;
segments = countArgs(input);
if (segments > 0) {
// create an array of char pointers
argv = malloc(sizeof(char *) * segments);
p->argv = argv;
// create malloc'd strings
line = strdup(input);
s = strdup(input);
s = strsep(&line, " ");
i = 0;
while (s != NULL) {
if (strlen(s) > 0) {
arg = strdup(s);
p->argv[i] = arg;
// if last argument is "&"
if (i+1 == segments && checkBackground(arg)) {
// don't add as an argument
// change p->background -> TRUE
// printf("adding as background..\n");
p->background = TRUE;
free(arg);
} else if (checkRedirection(arg)) {
// don't add as an argument
// change p->relevantStream -> new redirection
// printf("adding as redirection..\n");
free(arg);
} else {
// add arg as an argument
// increment arg counter in struct
// printf("adding as new argv[%d]: #%s#\n", i, arg);
// argv[i] = arg; // these two lines are equivalent.
// arg = strsep(&arg, "\n"); // remove \n
p->argv[i] = arg;
p->argc += 1;
i += 1;
}
}
s = strsep(&line, " ");
}
free(line);
free(s);
}
}
int main(int argc, char * argv[]){
char buffer[500];
char *args[10];
char *path = "/bin/";
char fullPath[20];
char *token;
int i;
int isBackground;
do{
isBackground = 0;
printf("> ");
fgets(buffer, 500, stdin);
//checks if the command is exit
if (strcmp(buffer, "exit\n")==0){
printf("logout\n\n[Process completed]\n");
exit(0);
}
token = strtok(buffer, " \n");
i = 0;
// parse the command line input
while(token!=NULL){
args[i] = token;
token = strtok(NULL, " \n");
i++;
}
args[i] = NULL;
pid_t pid = fork();
int type = 0;
int status = 0;
if (checkBackground(args,i) == 1){
args[i-1] = NULL;
isBackground = 1;
}
if (pid >= 0){
if (pid == 0){
printf("In Child");
//menu(args,i);
}else{
printf("In Parent\n");
if (isBackground==1)
type = WNOHANG;
waitpid(pid, &status, type);
if (type == 0)
printf("in forground\n");
}
}else {
printf("Fork Failed\n");
}
}while (1);
return 0;
}
