getgrnam
extern struct group *getgrnam(const char *name);
groupInfo = getgrnam(groupName);
struct group* groupInfo = getgrnam(kNogroupName);
grp = getgrnam(item->gidstr);
if (getgrnam(group) != NULL) {
if (getgrnam(group) == NULL) {
struct group* groupInfo = getgrnam(group);
if ((grp = getgrnam(p+1)) == NULL)