| .TH "CAPNG_LOCK" "3" "June 2009" "Red Hat" "Libcap-ng API" |
| .SH NAME |
| capng_lock \- lock the current process capabilities settings |
| .SH "SYNOPSIS" |
| .B #include <cap-ng.h> |
| .sp |
| int capng_lock(void); |
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| .SH "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. |
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| .SH "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. |
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| .SH "SEE ALSO" |
| |
| .BR capng_apply (3), |
| .BR prctl (2), |
| .BR capabilities (7) |
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| .SH AUTHOR |
| Steve Grubb |
