void advertise(char *, char *, char *, va_list);
void advise(char *, char *, ...);
void ambigsw(char *, struct swit *);
-int atooi(char *);
char **brkstring(char *, char *, char *);
int check_charset(char *, int);
-void closefds(int);
char *concat(char *, ...);
int context_del(char *);
char *context_find(char *);