in tcl_cmds.c [1098:1108]
static int r_set_subprocess_env(int objc, Tcl_Obj *CONST objv[])
{
if (objc != 4) {
Tcl_WrongNumArgs(interp, 2, objv, "variable_name variable");
return TCL_ERROR;
}
apr_table_set(_r->subprocess_env, Tcl_GetString(objv[2]), Tcl_GetString(objv[3]));
return TCL_OK;
}