Currently I'm trying to understand capabilities in Linux by reading http://man7.org/linux/man-pages/man7/capabilities.7.html

I created a small C++ application with the capability CAP_DAC_READ_SEARCH+eip

The capability works fine for the application. But I have a system() call inside

system("cat /dev/mtdX > targetFile");

How I can inherit the capability to this call?

Edit: I know that system() is driven by fork() + execl(). In the documentation is mentioned, that with fork the child process get the same capabilities as the parent process. But why does the read capability is not inherited?

Currently I'm trying to understand capabilities in Linux by reading http://man7.org/linux/man-pages/man7/capabilities.7.html

I created a small C++ application with the capability CAP_DAC_READ_SEARCH+eip

The capability works fine for the application. But I have a system() call inside

system("cat /dev/mtdX > targetFile"); 

How I can inherit the capability to this call?

Edit:

I know that system() is driven by fork() + execl(). In the documentation is mentioned, that with fork() the child process get the same capabilities as the parent process. But why is the read capability not inherited?

Currently I'm trying to understand capabilities in Linux by reading http://man7.org/linux/man-pages/man7/capabilities.7.html

I created a small C++ application with the capability CAP_DAC_READ_SEARCH+eip

The capability works fine for the application. But I have a system() call inside

system("cat /dev/mtdX > targetFile");

How I can inherit the capability to this call?

Currently I'm trying to understand capabilities in Linux by reading http://man7.org/linux/man-pages/man7/capabilities.7.html

I created a small C++ application with the capability CAP_DAC_READ_SEARCH+eip

The capability works fine for the application. But I have a system() call inside

system("cat /dev/mtdX > targetFile");

How I can inherit the capability to this call?

Edit: I know that system() is driven by fork() + execl(). In the documentation is mentioned, that with fork the child process get the same capabilities as the parent process. But why does the read capability is not inherited?