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.TH "CAPNG_SET_ROOTID" "3" "March 2026" "Red Hat" "Libcap-ng API"
.SH NAME
capng_set_rootid \- set namespace root id
.SH "SYNOPSIS"
.B #include <cap-ng.h>
.sp
int capng_set_rootid(int rootid);
.SH "DESCRIPTION"
capng_set_rootid sets the rootid for file capabilities operations. Pass CAPNG_UNSET_ROOTID to clear a previously selected namespace root id and go back to writing regular V2 file capabilities.
.SH "RETURN VALUE"
On success, it returns 0. It returns -1 if there is an internal error, the kernel does not support V3 filesystem capabilities, or an invalid rootid is supplied.
.SH "SEE ALSO"
.BR capng_apply_caps_fd (3),
.BR capabilities (7)
.SH AUTHOR
Steve Grubb
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