int zpm_foreach_path(struct zpm *zpm, char *pkgid, char *where,
int (*callback)(void *f, int ncols, char **vals, char **cols),
void *data, char **errmsg);
int zpm_foreach_path(struct zpm *zpm, char *pkgid, char *where,
int (*callback)(void *f, int ncols, char **vals, char **cols),
void *data, char **errmsg);