Dev*
opendev(char *fn)
{
Dev *d;
int l;
if(access("/dev/usb", AEXIST) < 0 && bind("#u", "/dev", MBEFORE) < 0)
return nil;
d = emallocz(sizeof(Dev), 1);
incref(d);
l = strlen(fn);
d->dfd = -1;
/*
* +30 to allocate extra size to concat "/<epfilename>"
* we should probably remove that feature from the manual
* and from the code after checking out that nobody relies on
* that.
*/
d->dir = emallocz(l + 30, 0);
strcpy(d->dir, fn);
strcpy(d->dir+l, "/ctl");
d->cfd = open(d->dir, ORDWR|OCEXEC);
d->dir[l] = 0;
d->id = nameid(fn);
if(d->cfd < 0){
werrstr("can't open endpoint %s: %r", d->dir);
free(d->dir);
free(d);
return nil;
}
dprint(2, "%s: opendev %#p %s\n", argv0, d, fn);
return d;
}
JSDProperty*
jsd_GetValueProperty(JSDContext* jsdc, JSDValue* jsdval, JSString* nameStr)
{
JSContext* cx = jsdc->dumbContext;
JSDProperty* jsdprop;
JSDProperty* iter = NULL;
JS::RootedObject obj(cx);
JS::RootedString name(cx, nameStr);
unsigned attrs = 0;
JSBool found;
JSPropertyDesc pd;
const jschar * nameChars;
size_t nameLen;
JS::RootedValue val(cx), nameval(cx);
JS::RootedId nameid(cx);
JSCompartment* oldCompartment = NULL;
if(!jsd_IsValueObject(jsdc, jsdval))
return NULL;
/* If we already have the prop, then return it */
while(NULL != (jsdprop = jsd_IterateProperties(jsdc, jsdval, &iter)))
{
JSString* propName = jsd_GetValueString(jsdc, jsdprop->name);
if(propName) {
int result;
if (JS_CompareStrings(cx, propName, name, &result) && !result)
return jsdprop;
}
JSD_DropProperty(jsdc, jsdprop);
}
/* Not found in property list, look it up explicitly */
if(!(obj = JSVAL_TO_OBJECT(jsdval->val)))
return NULL;
if (!(nameChars = JS_GetStringCharsZAndLength(cx, name, &nameLen)))
return NULL;
JS_BeginRequest(cx);
oldCompartment = JS_EnterCompartment(cx, obj);
JS_GetUCPropertyAttributes(cx, obj, nameChars, nameLen, &attrs, &found);
if (!found)
{
JS_LeaveCompartment(cx, oldCompartment);
JS_EndRequest(cx);
return NULL;
}
JS_ClearPendingException(cx);
if(!JS_GetUCProperty(cx, obj, nameChars, nameLen, val.address()))
{
if (JS_IsExceptionPending(cx))
{
if (!JS_GetPendingException(cx, &pd.value))
{
JS_LeaveCompartment(cx, oldCompartment);
JS_EndRequest(cx);
return NULL;
}
pd.flags = JSPD_EXCEPTION;
}
else
{
pd.flags = JSPD_ERROR;
pd.value = JSVAL_VOID;
}
}
else
{
pd.value = val;
}
JS_LeaveCompartment(cx, oldCompartment);
JS_EndRequest(cx);
nameval = STRING_TO_JSVAL(name);
if (!JS_ValueToId(cx, nameval, nameid.address()) ||
!JS_IdToValue(cx, nameid, &pd.id)) {
return NULL;
}
pd.spare = 0;
pd.alias = JSVAL_NULL;
pd.flags |= (attrs & JSPROP_ENUMERATE) ? JSPD_ENUMERATE : 0
| (attrs & JSPROP_READONLY) ? JSPD_READONLY : 0
| (attrs & JSPROP_PERMANENT) ? JSPD_PERMANENT : 0;
return _newProperty(jsdc, &pd, JSDPD_HINTED);
}
