pw_checkname
char *pw_checkname(char *name, int gecos);
grp->gr_name = pw_checkname(name, 0);
grp->gr_name = pw_checkname(newname, 0);
name = pw_checkname(arg1, 0);
name = pw_checkname(optarg, 0);
gecos = pw_checkname(optarg, 1);
cmdcnf->default_class = pw_checkname(optarg, 0);
gecos = pw_checkname(optarg, 1);
class = pw_checkname(optarg, 0);
pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
pwd->pw_name = pw_checkname(newname, 0);
pwd = GETPWNAM(pw_checkname(name, 0));
pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);