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authorMark H Weaver <mhw@netris.org>2014-03-11 20:31:38 -0400
committerMark H Weaver <mhw@netris.org>2014-03-11 21:39:20 -0400
commit9fcee9da3f28b4b190d6976aeea72ab3c9f62bb2 (patch)
tree6324642416c08b9b10afbd9f05fc999e8844d814 /libguile/socket.c
parent03cce0ce5fba210e4abd8fa5dfddb04022a27e75 (diff)
downloadguile-9fcee9da3f28b4b190d6976aeea72ab3c9f62bb2.tar.gz
Use 'offsetof' to avoid undefined behavior.
* libguile/socket.c (SUN_LEN): Use 'offsetof'.
Diffstat (limited to 'libguile/socket.c')
-rw-r--r--libguile/socket.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libguile/socket.c b/libguile/socket.c
index c0faae1aa..5b17a741a 100644
--- a/libguile/socket.c
+++ b/libguile/socket.c
@@ -64,7 +64,7 @@
#if defined (HAVE_UNIX_DOMAIN_SOCKETS) && !defined (SUN_LEN)
-#define SUN_LEN(ptr) ((size_t) (((struct sockaddr_un *) 0)->sun_path) \
+#define SUN_LEN(ptr) (offsetof (struct sockaddr_un, sun_path) \
+ strlen ((ptr)->sun_path))
#endif