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CAPNG_LOCK

Section: Libcap-ng API (3)
Updated: June 2009
Index Return to Main Contents
 

NAME

capng_lock - lock the current process capabilities settings  

SYNOPSIS

#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


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
SEE ALSO
AUTHOR


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