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capng_have_capabilities(3) [centos man page]

CAPNG_HAVE_CAPABILITIES(3)					   Libcap-ng API					CAPNG_HAVE_CAPABILITIES(3)

NAME
capng_have_capabilities - general check for capabilities SYNOPSIS
#include <cap-ng.h> capng_results_t capng_have_capabilities(capng_select_t set); DESCRIPTION
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. RETURN VALUE
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
Steve Grubb 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 SYNOPSIS
#include <cap-ng.h> int capng_change_id(int uid, int gid, capng_flags_t flag); DESCRIPTION
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: CAPNG_NO_FLAG Simply change uid and retain specified capabilities and that's all. CAPNG_DROP_SUPP_GRP After changing id, remove and supplement groups that may come with the account. CAPNG_CLEAR_BOUNDING After changing the uid and gid, clear the bounding set regardless to the internal representation already setup. RETURN VALUE
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
Steve Grubb Red Hat June 2009 CAPNG_CHANGE_ID(3)

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