int main (int argc, char* argv[])
{
char cmdln[MAX_LEN];
char items[MAX_ITEMS][MAX_LEN];
int nr_items;
int i;
while(1)
{
printf(">"); fgets(cmdln,MAX_LEN,stdin);
nr_items = parseitems(cmdln, items);
if( strcmp(items[0], "exit")==0 )
{
printf("Goodbye!\n");
return 0;
}
if(nr_items==0)
continue;
printf("# of arguments: %d\n", nr_items);
for(i=0; i<nr_items; i++)
{
printf("-argv[%d]: %s\n",i, items[i]);
}
}
return 0;
}
struct room* parseroom() {
struct room* r = (struct room*) malloc(sizeof(struct room));
r->id = atoi(strtok(NULL, NEWLINE));
r->type = (char*) malloc(sizeof(char) * 16);
strcpy(r->type, strtok(NULL, NEWLINE));
int textlines = atoi(strtok(NULL, NEWLINE));
r->text = (char*) malloc(sizeof(char) * 4000);
int offset = 0;
int i;
for (i = 0; i < textlines; ++i) {
char* line = strtok(NULL, NEWLINE);
strcpy(r->text + offset, line);
offset += strlen(line);
r->text[offset] = '\n';
offset++;
}
r->text[offset] = 0;
parseexits(r);
parseitems(r);
parsemobs(r);
return r;
}
int main (int argc, char* argv[])
{
char cmdln[MAX_LEN];
char items[MAX_ITEMS][MAX_LEN];
int nr_items;
int i;
pid_t pid;
int status;
char * args[MAX_ITEMS];
while(1)
{
printf(">"); fgets(cmdln, MAX_LEN, stdin);
nr_items = parseitems(cmdln, items);
if( strcmp(items[0], "exit")==0 )
{
printf("Goodbye!\n");
return 0;
}
if(nr_items==0)
continue;
for(i=0; i<MAX_ITEMS; i++)
args[i]=NULL;
for(i=0 ; i<nr_items; i++)
args[i]=items[i];
if((pid=fork())==0)
{
if(execvpe(items[0], args, environ) <0)
{
printf("%s: Command not found.\n", items[0]);
exit(0);
}
}
else
{
if(waitpid(pid,&status, 0)<0)
{
printf("waitpid error\n");
}
}
}
return 0;
}
int main (int argc, char* argv[])
{
char cmdln[MAX_LEN];
char items[MAX_ITEMS][MAX_LEN];
int nr_items;
pid_t pid;
int status, bg;
int i;
char* args[MAX_ITEMS];
signal(SIGCHLD, child_handler);
// Initialize
for(i=0; i<MAX_BG_ITEMS; i++)
P[i].pid = -1;
while(1)
{
usleep(1000 * 10);
printf(">"); fgets(cmdln, MAX_LEN, stdin);
bg=0;
nr_items = parseitems ( cmdln, items );
// Check EXIT
if( strcmp(items[0], "exit")==0 )
{
printf("Goodbye!\n");
return 0;
}
// Check STATUS
if( strcmp(items[0], "status")==0 )
{
for(i=0; i<MAX_BG_ITEMS; i++)
{
if(P[i].pid!=-1)
printf("[%d] %s\n", P[i].pid, P[i].cmd);
}
strcpy(items[0],"");
continue;
}
// Check # of argument
if(nr_items==0)
continue;
/*
// Check Close
if(strcmp(items[0], "close")==0)
{
pid=atoi(items[1]);
for(i=0; i<MAX_BG_ITEMS; i++)
{
if(P[i].pid == pid)
{
P[i].pid=-1;
waitpid(pid, &status, 0);
printf("[%d] closed\n", pid);
num--;
}
}
continue;
}
*/
if(strcmp(items[0], "killone")==0)
{
pid=atoi(items[1]);
killone(pid);
continue;
}
if(strcmp(items[0], "killemall")==0)
{
killemall();
continue;
}
if(strcmp(items[0], "fg")==0)
{
if(num==0)
printf("no background process\n");
else
{
waitpid(stack[Spos-1], &status, 0);
for(i=0; i<MAX_BG_ITEMS; i++){
if(P[i].pid==stack[Spos-1])
P[i].pid=-1;
}
Spos--;
num--;
}
continue;
}
// Check background
if(strcmp(items[nr_items-1],"&")==0)
{
// Check Maximum
if(num>=MAX_BG_ITEMS)
{
printf("Failed: maximum # of background job is %d\n",MAX_BG_ITEMS);
continue;
}
else bg=1;
}
if(bg) nr_items--;
// Erase buffer
for(i=0; i<MAX_ITEMS; i++)
args[i]=NULL;
for(i=0; i<nr_items; i++)
args[i]=items[i];
if((pid=fork())==0)
{
if(bg){
printf("[%d] %s \n", getpid(), items[0]);
}
if(execvpe(items[0], args, environ) <0)
{
printf("%s: Command not found.\n", args[0]);
exit(0);
}
}
else
{
if(!bg)
{
if(waitpid(pid, &status, 0) < 0 )
printf("waitpid error\n");
}
else
{
for(i=0; i<MAX_BG_ITEMS; i++)
{
if(P[i].pid==-1)
{
P[i].pid=pid;
strcpy(P[i].cmd, args[0]);
stack[Spos]=pid;
break;
}
}
Spos++;
num++;
}
}
}
return 0;
}
