X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fsocket-util.c;h=9b4a1b3b48f8aa53f5e6b2ec2aa8a71511024ea0;hp=a2fa13e59440e6e8d2d7b6dcdcdeb28e9dcb0460;hb=8e9b7dd86b26e1fdfedcee221ec5537c18ca5d0c;hpb=0e098b15c76e222f7de381203c0c35a75a5b2f24

diff --git a/src/socket-util.c b/src/socket-util.c
index a2fa13e59..9b4a1b3b4 100644
--- a/src/socket-util.c
+++ b/src/socket-util.c
@@ -506,7 +506,21 @@ bool socket_address_needs_mount(const SocketAddress *a, const char *prefix) {
 }
 
 bool socket_ipv6_is_supported(void) {
-        return access("/sys/module/ipv6", F_OK) == 0;
+        char *l = 0;
+        bool enabled;
+
+        if (access("/sys/module/ipv6", F_OK) != 0)
+                return 0;
+
+        /* If we can't check "disable" parameter, assume enabled */
+        if (read_one_line_file("/sys/module/ipv6/parameters/disable", &l) < 0)
+                return 1;
+
+        /* If module was loaded with disable=1 no IPv6 available */
+        enabled = l[0] == '0';
+        free(l);
+
+        return enabled;
 }
 
 static const char* const socket_address_bind_ipv6_only_table[_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX] = {