environ_find
envent = environ_find(c->environ, "TMUX_PANE");
envent = environ_find(global_environ, name);
envent = environ_find(global_environ, "HOME");
envent = environ_find(env, name);
if ((envent = environ_find(env, name)) != NULL) {
if ((envent = environ_find(env, name)) != NULL) {
if ((envent = environ_find(env, name)) == NULL)
envent = environ_find(ft->s->environ, key);
envent = environ_find(global_environ, key);
envent = environ_find(c->environ, "TMUX");
ee = environ_find(c->environ, "PATH");
if (environ_find(child, "PATH") == NULL)
value = environ_find(global_environ, name);
struct environ_entry *environ_find(struct environ *, const char *);
envent = environ_find(tty->client->environ, "COLORTERM");