Signed-off-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx> --- v3: Document use of gid/egid/sgid. v2: Document requirement for no_new_privs. (If this doesn't end up going into 3.18, the version number in the patch will need updating.) man2/getgroups.2 | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/man2/getgroups.2 b/man2/getgroups.2 index 373c204..e2b834e 100644 --- a/man2/getgroups.2 +++ b/man2/getgroups.2 @@ -81,9 +81,16 @@ to be used in a further call to .PP .BR setgroups () sets the supplementary group IDs for the calling process. -Appropriate privileges (Linux: the +A process with the .B CAP_SETGID -capability) are required. +capability may change its supplementary group IDs arbitrarily. +As of Linux 3.18, any process that has enabled PR_SET_NO_NEW_PRIVS (see +.BR prctl (2)) +may drop supplementary groups, or add any of the current real UID, the current +effective UID, or the current saved set-user-ID; adding any other group ID +requires the +.B CAP_SETGID +capability. The .I size argument specifies the number of supplementary group IDs -- 2.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
