capng_get_rootid - Man Page

#include <cap-ng.h>

uid_t capng_get_rootid(void);

capng_get_rootid gets the rootid for file capabilities operations. The value is a host-endian user ID in the caller's user namespace.

If V3 file capabilities have not been selected, or the kernel does not support them, it returns CAPNG_UNSET_ROOTID. Otherwise it returns the namespace root user ID.

capng_get_caps_fd(3), capabilities(7)

Steve Grubb