capng_get_rootid - get namespace root id

Steve Grubb Red Hat Sept 2020 CAPNG_GET_ROOTID(3)

capng_get_rootid gets the rootid for capabilities operations. This is only applicable for file system operations.

capng_get_rootid - get namespace root id

If the file is in the init namespace or the kernel does not support V3 file system capabilities, it returns CAPNG_UNSET_ROOTID. Otherwise it return an integer for the namespace root id.

capng_get_caps_fd(3), capabilities(7)

#include<cap-ng.h> int capng_get_rootid(void);