ipcperms (9)

int ipcperms(struct ipc_namespace * ns, struct kern_ipc_perm * ipcp, short flag);

ns

ipc namespace

ipcp

ipc permission set

flag

desired permission set

Check user, group, other permissions for access to ipc resources. return 0 if allowed

flag will most probably be 0 or S_...UGO from <linux/stat.h>