char **strv_env_merge(unsigned n_lists, ...);
char **strv_env_delete(char **x, unsigned n_lists, ...);
+char **strv_env_set(char **x, const char *p);
+
+char *strv_env_get_with_length(char **l, const char *name, size_t k);
+char *strv_env_get(char **x, const char *n);
+
#define STRV_FOREACH(s, l) \
for ((s) = (l); (s) && *(s); (s)++)