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    Command:

    avc_netlink_close

    
           SELinux netlink processing.
    
    
    

    SYNOPSIS

           #include <selinux/selinux.h>
    
           #include <selinux/avc.h>
    
           int avc_netlink_open(int blocking);
    
           void avc_netlink_close(void);
    
           int avc_netlink_acquire_fd(void);
    
           void avc_netlink_release_fd(void);
    
           void avc_netlink_loop(void);
    
           int avc_netlink_check_nb(void);
    
    
    

    DESCRIPTION

           These  functions  enable applications to handle notification of SELinux
           events via netlink.  The userspace AVC normally checks for netlink mes-
           sages  on each call to avc_has_perm(3).  Applications may wish to over-
           ride this behavior and check for notification separately,  for  example
           in  a  select(2)  loop.  These functions also permit netlink monitoring
           without requiring a call to avc_open(3).
    
           avc_netlink_open opens a netlink socket to  receive  SELinux  notifica-
           tions.     The    socket   descriptor   is   stored   internally;   use
           avc_netlink_acquire_fd(3) to take ownership of it in application  code.
           The  blocking  argument  controls whether the O_NONBLOCK flag is set on
           the socket descriptor.  avc_open(3)  calls  this  function  internally,
           specifying non-blocking behavior.
    
           avc_netlink_close  closes  the netlink socket.  This function is called
           automatically by avc_destroy(3).
    
           avc_netlink_acquire_fd returns the netlink socket descriptor number and
           informs  the userspace AVC not to check the socket descriptor automati-
           cally on calls to avc_has_perm(3).
    
           avc_netlink_release_fd returns control of the  netlink  socket  to  the
           userspace AVC, re-enabling automatic processing of notifications.
    
           avc_netlink_check_nb checks the netlink socket for pending messages and
           processes them.  Callbacks for policyload and enforcing changes will be
           called; see selinux_set_callback(3).  This function does not block.
    
           avc_netlink_loop  enters a loop blocking on the netlink socket and pro-
           cessing messages as they are received.  This function will  not  return
           unless  an  error  occurs  on  the  socket, in which case the socket is
                                      30 Mar 2009              avc_netlink_loop(3)
    
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