Merge "check if uid=0 before attempting remount"

    char buffer[200];

    char prop_buf[PROPERTY_VALUE_MAX];

    if (getuid() != 0) {

        WriteStringFully(fd, "Not running as root. Try \"adb root\" first.\n");

        adb_close(fd);

        return;

    }

    bool system_verified = false, vendor_verified = false;

    property_get("partition.system.verified", prop_buf, "0");

    if (!strcmp(prop_buf, "1")) {