[libvirt] [PATCH 3/4] Report error if unable to bind to any socket

[Daniel P. Berrange]

From: "Daniel P. Berrange" <berrange at redhat.com>

When setting up a server socket, we must skip EADDRINUSE errors
from bind, since the IPv6 socket bind may have already bound to
the IPv4 socket too. If we don't manage to bind to any sockets
at all though, we should then report the EADDRINUSE error as
normal.

This fixes the case where libvirtd would not exit if some other
program was listening on its TCP/TLS ports.

* src/rpc/virnetsocket.c: Report EADDRINUSE
---
 src/rpc/virnetsocket.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/src/rpc/virnetsocket.c b/src/rpc/virnetsocket.c
index d4c0bdd..dcdc937 100644
--- a/src/rpc/virnetsocket.c
+++ b/src/rpc/virnetsocket.c
@@ -192,6 +192,7 @@ int virNetSocketNewListenTCP(const char *nodename,
     struct addrinfo hints;
     int fd = -1;
     int i;
+    int addrInUse = false;
 
     *retsocks = NULL;
     *nretsocks = 0;
@@ -250,7 +251,9 @@ int virNetSocketNewListenTCP(const char *nodename,
                 virReportSystemError(errno, "%s", _("Unable to bind to port"));
                 goto error;
             }
+            addrInUse = true;
             VIR_FORCE_CLOSE(fd);
+            runp = runp->ai_next;
             continue;
         }
 
@@ -273,6 +276,12 @@ int virNetSocketNewListenTCP(const char *nodename,
         fd = -1;
     }
 
+    if (nsocks == 0 &&
+        addrInUse) {
+        virReportSystemError(EADDRINUSE, "%s", _("Unable to bind to port"));
+        goto error;
+    }
+
     freeaddrinfo(ai);
 
     *retsocks = socks;
-- 
1.7.6