adb: `features` passes transport features.
`adb features` previously returned a list of host features which was
not terribly useful. This CL changes functionality to return the
transport features instead using the standard targeting args:
$ adb features # default target.
$ adb -e features
$ adb -s 123456 features
Also adds a "check-feature" service which is currently unused but will
allow the adb client to easily check for a specific feature.
Bug: http://b/23824036
Change-Id: Ibc0c420c75f73d363f3bba7705af616ba2059348
diff --git a/adb/adb.cpp b/adb/adb.cpp
index 14df8a1..dcb6424 100644
--- a/adb/adb.cpp
+++ b/adb/adb.cpp
@@ -1132,9 +1132,27 @@
}
if (!strcmp(service, "features")) {
- SendOkay(reply_fd);
- SendProtocolString(
- reply_fd, android::base::Join(supported_features(), '\n'));
+ std::string error_msg;
+ atransport* t = acquire_one_transport(kCsAny, type, serial, &error_msg);
+ if (t != nullptr) {
+ SendOkay(reply_fd, android::base::Join(t->features(), '\n'));
+ } else {
+ SendFail(reply_fd, error_msg);
+ }
+ return 0;
+ }
+
+ if (!strncmp(service, "check-feature:", strlen("check-feature:"))) {
+ std::string error_msg;
+ atransport* t = acquire_one_transport(kCsAny, type, serial, &error_msg);
+ if (t && t->CanUseFeature(service + strlen("check-feature:"))) {
+ // We could potentially extend this to reply with the feature
+ // version if that becomes necessary.
+ SendOkay(reply_fd, "1");
+ } else {
+ // Empty response means unsupported feature.
+ SendOkay(reply_fd, "");
+ }
return 0;
}