capng_set_rootid - Man Page

set namespace root id

Synopsis

#include <cap-ng.h>

int capng_set_rootid(int rootid);

Description

capng_set_rootid sets the rootid for file capabilities operations. Pass CAPNG_UNSET_ROOTID to clear a previously selected namespace root id and go back to writing regular V2 file capabilities.

Return Value

On success, it returns 0. It returns -1 if there is an internal error, the kernel does not support V3 filesystem capabilities, or an invalid rootid is supplied.

See Also

capng_apply_caps_fd(3), capabilities(7)

Author

Steve Grubb

Info

March 2026 Red Hat Libcap-ng API