I wanted to find the source code of embedded Linux that is used in  Shenzhen Apexis Electronic Co.,Ltd products.For example in this page: http://apexis.com.cn/productsdetails_244.htmlYou see they mentioned 'Embedded LINUX System' as the OS used in their product.I sent an email with this text to them:Source code of your Embedded LINUX SystemHi.  As you should know linux is open source and under GPLv2 that says if anyone uses it he must release it under GPLv2 that means source code must be available to requestors.  I saw that you use an Embedded LINUX System in your product in this page: http://apexis.com.cn/productsdetails_244.html  I searched but could not find its the source code of your linux OS.  Where can I find it?Thank you.  Regards.But they replied:Hi ,Sir Sorry to us can not provide  source code of the linux OS .Please Understand .I am not sure but recently some guy told me that, legally, Open source software like Linux kernel used in embedded systems need not to remain/be released as open source. But I think Linux is under GPLv2 that hasn't such an exception and is a copyleft license that doesn't let its use in proprietary software. It says the source code should be available to requestors.Can this be a violation of GPL?
Legal status of an embedded Linux case
linux kernel;embedded;free software;gpl;open source