mkfifoat
int mkfifoat(int fd, const char *path, mode_t mode);
extern int mkfifoat(int fd, const char *path, mode_t mode);
return mkfifoat(fd, path, mode);
HIDDEN_FUNCTION(mkfifoat);
return mkfifoat(AT_FDCWD, path, mode);
return mkfifoat(fd, path, mode);