Is there any difference between adb wait-for-device and adb wait-for-devices?

Question

There are two commands that I used wait for a device to come up: adb wait-for-device and adb wait-for-devices. Both seem to wait for a device to boot up, I din\'t find any d

Answer 1

This is how adb handles the command:

 /* handle wait-for-* prefix */
if (!strncmp(argv[0], "wait-for-", strlen("wait-for-"))) {
    const char* service = argv[0];
    if (!strncmp(service, "wait-for-device", strlen("wait-for-device"))) {
        if (ttype == kTransportUsb) {
            service = "wait-for-usb";
        } else if (ttype == kTransportLocal) {
            service = "wait-for-local";
        } else {
            service = "wait-for-any";
        }
    }

So any string starting with wait-for-device would have the same effect