Check return value of poll call and if it fails print error
to the system log. If errno is EINVAL then exit with non-zero
value otherwise continue the while loop and call poll again.

Signed-off-by: Tomas Hozza <tho...@redhat.com>
---
 tools/hv/hv_kvp_daemon.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index ae9aa1c..81cbb6e 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -1490,7 +1490,16 @@ int main(void)
                socklen_t addr_l = sizeof(addr);
                pfd.events = POLLIN;
                pfd.revents = 0;
-               poll(&pfd, 1, -1);
+
+               if (poll(&pfd, 1, -1) < 0) {
+                       syslog(LOG_ERR, "poll failed; error: %d %s", errno, 
strerror(errno));
+                       if (errno == EINVAL) {
+                               close(fd);
+                               exit(EXIT_FAILURE);
+                       }
+                       else
+                               continue;
+               }
 
                len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
                                addr_p, &addr_l);
-- 
1.8.1.4

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