Something

statusItem = [[[NSStatusBar systemStatusBar]
statusItemWithLength:NSVariableStatusItemLength]retain];
 [statusItem setHighlightMode:YES];
[statusItem setTitle:[NSString stringWithString:@"updating..."]];
[statusItem setMenu:Menu];
[statusItem setEnabled:YES];

FILE *f;
char buf[6];
NSString *data;

f=popen("/test","r");
while (!feof(f)) {
			if (fgets(buf, sizeof(buf), f)) {

			}
}


NSString *string = [NSString stringWithCString: buf];

[statusItem setTitle:[NSString stringWithFormat:@"%@",string]];