getusershell
char *getusershell(void);
while ((t = getusershell()) != NULL) {
extern char *getusershell(void);
valid = getusershell();
valid = getusershell();
valid = getusershell();
valid = getusershell();
extern char *getusershell();
while ((p = getusershell()) != NULL)
for (valid = getusershell(); valid; valid = getusershell())
for (valid = getusershell(); valid; valid = getusershell()) {
extern char *getusershell(void);
extern char *getusershell(void);
extern char *getusershell(void);
char *sh, *getusershell();
while((sh = getusershell()) != NULL ) {