in tcl_cmds.c [2206:2229]
int cmd_ap_create_environment(ClientData cd, Tcl_Interp *ixx, int objc, Tcl_Obj *CONST objv[])
{
char **env, *nm_env;
int i;
asprintf(&nm_env, "::%s::env", _r->filename);
ap_add_cgi_vars(_r);
ap_add_common_vars(_r);
env = ap_create_environment(_r->pool, _r->subprocess_env);
for (i = 0; env[i]; i++) {
char *sptr = strchr(env[i], '=');
*sptr = '\0';
set_var(interp, nm_env, env[i], "%s", sptr + 1);
*sptr = '=';
}
free(nm_env);
return TCL_OK;
}