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CAPNG_LOCK
Section: Libcap-ng API (3)Updated: June 2009
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NAME
capng_lock - lock the current process capabilities settingsSYNOPSIS
#include <cap-ng.h>int capng_lock(void);
DESCRIPTION
capng_lock will take steps to prevent children of the current process to regain full privileges if the uid is 0. This should be called while possessing the CAP_SETPCAP capability in the kernel. This function will do the following if permitted by the kernel: Set the NOROOT option on for PR_SET_SECUREBITS, set the NOROOT_LOCKED option to on for PR_SET_SECUREBITS, set the PR_NO_SETUID_FIXUP option on for PR_SET_SECUREBITS, and set the PR_NO_SETUID_FIXUP_LOCKED option on for PR_SET_SECUREBITS.
RETURN VALUE
This returns 0 on success and a negative number on failure. -1 means a failure setting any of the PR_SET_SECUREBITS options.
SEE ALSO
capng_apply(3), prctl(2), capabilities(7)
AUTHOR
Steve Grubb