env_get
char *env_get(struct request *, const char *);
res = prep_request(&ctx, env_get(c, "REQUEST_METHOD"),
env_get(c, "PATH_INFO"), env_get(c, "QUERY_STRING"));
if (env_get("PATH", e->envp) == NULL && environ != NULL) {
chdir(env_get("HOME", e->envp));
char *shell = env_get("SHELL", e->envp);
mailto = env_get("MAILTO", e->envp);
if (!env_get("SHELL", e->envp)) {
if (!env_get("HOME", e->envp)) {
char *env_get(char *, char **),