/* main */
int main(int argc, char * argv[])
{
Prefs prefs;
int o;
char * p;
memset(&prefs, 0, sizeof(prefs));
prefs.pid = -1;
while((o = getopt(argc, argv, "g:p:u:")) != -1)
switch(o)
{
case 'g':
prefs.group = optarg;
break;
case 'p':
prefs.pid = strtol(optarg, &p, 0);
if(optarg[0] == '\0' || *p != '\0'
|| prefs.pid < 0)
return _usage();
break;
case 'u':
prefs.username = optarg;
break;
default:
return _usage();
}
if(optind != argc)
return _usage();
return (_ps(&prefs) == 0) ? 0 : 2;
}
void _ps(const char * b, const char * e, char * buf, int i)
{
if (b == e) {
if (i == 0) {
std::cout << "[]\n";
} else {
buf[i] = 0;
std::cout << buf << '\n';
}
return;
}
buf[i] = *b;
_ps(b + 1, e, buf, i + 1);
_ps(b + 1, e, buf, i);
}
void print_powerset(const char * str)
{
if (!str || !*str) {
std::cout << "[]\n";
return;
}
size_t len = strlen(str);
char * buf = new char[len+1];
_ps(str, str + len, buf, 0);
delete[] buf;
}
