CAPNG_HAVE_CAPABILITIES(3) Libcap-ng API CAPNG_HAVE_CAPABILITIES(3)NAME
capng_have_capabilities - general check for capabilities
capng_results_t capng_have_capabilities(capng_select_t set);
capng_have_capabilities will check the selected internal capabilities sets to see what the status is. The capabilities sets must be previ-
ously setup with calls to capng_get_caps_process, capng_get_caps_fd, or in some other way setup. The options are CAPNG_SELECT_CAPS for the
traditional capabilities, CAPNG_SELECT_BOUNDS for the bounding set, or CAPNG_SELECT_BOTH if clearing both is desired.
This funtion will return one of the following four self explanatory values: CAPNG_FAIL, CAPNG_NONE, CAPNG_PARTIAL, CAPNG_FULL.
SEE ALSO capng_get_caps_process(3), capng_get_caps_fd(3), capng_have_capability(3), capabilities(7)AUTHOR
Red Hat June 2009 CAPNG_HAVE_CAPABILITIES(3)
Check Out this Related Man Page
CAPNG_CHANGE_ID(3) Libcap-ng API CAPNG_CHANGE_ID(3)NAME
capng_change_id - change the credentials retaining capabilities
int capng_change_id(int uid, int gid, capng_flags_t flag);
This function will change uid and gid to the ones given while retaining the capabilities previously specified in capng_update. It is not
necessary and perhaps better if capng_apply has not been called prior to this function so that all necessary privileges are still intact.
The caller is required to have CAP_SETPCAP capability still active before calling this function.
This function also takes a flag parameter that helps to tailor the exact actions performed by the function to secure the environment. The
option may be or'ed together. The legal values are:
Simply change uid and retain specified capabilities and that's all.
After changing id, remove and supplement groups that may come with the account.
After changing the uid and gid, clear the bounding set regardless to the internal representation already setup.
This returns 0 on success and a negative number on failure. -1 means capng has not been initted properly, -2 means a failure requesting to
keep capabilities across the uid change, -3 means that applying the intermediate capabilities failed, -4 means changing gid failed, -5
means dropping supplemental groups failed, -6 means changing the uid failed, -7 means dropping the ability to retain caps across a uid
change failed, -8 means clearing the bounding set failed, -9 means dropping CAP_SETPCAP failed.
Note: the only safe action to do upon failure of this function is to probably exit. This is because you are likely in a situation with par-
tial permissions and not what you intended.
SEE ALSO capng_update(3), capng_apply(3), prctl(2), capabilities(7)AUTHOR
Red Hat June 2009 CAPNG_CHANGE_ID(3)
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