[lib] set PASSCRED netlink socket option

diff --git a/libmultipath/uevent.c b/libmultipath/uevent.c
index 92bd978..29441c1 100644 (file)
--- a/libmultipath/uevent.c
+++ b/libmultipath/uevent.c
@@ -116,6 +116,7 @@ int uevent_listen(int (*uev_trigger)(struct uevent *, void * trigger_data),
        int rcvszsz = sizeof(rcvsz);
        unsigned int *prcvszsz = (unsigned int *)&rcvszsz;
        pthread_attr_t attr;
+       const int feature_on = 1;
 
        my_uev_trigger = uev_trigger;
        my_trigger_data = trigger_data;
@@ -146,7 +147,6 @@ int uevent_listen(int (*uev_trigger)(struct uevent *, void * trigger_data),
 
        sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
        if (sock >= 0) {
-               const int feature_on = 1;
 
                condlog(3, "reading events from udev socket.");
 
@@ -196,6 +196,10 @@ int uevent_listen(int (*uev_trigger)(struct uevent *, void * trigger_data),
                }
                condlog(3, "receive buffer size for socket is %u.", rcvsz);
 
+               /* enable receiving of the sender credentials */
+               setsockopt(sock, SOL_SOCKET, SO_PASSCRED,
+                          &feature_on, sizeof(feature_on));
+
                retval = bind(sock, (struct sockaddr *) &snl,
                              sizeof(struct sockaddr_nl));
                if (retval < 0) {