isprefix
int isprefix(char *, char *);
if (isprefix(word, cp->c_name))
if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
if (isprefix(name, "help") || isprefix(name, "?")) {
if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
int isprefix(char *s1, char *s2);
if ((n = isprefix(name, *c)) == 0)