[Qemu-trivial] [PATCH v2 1/5] util/qemu-sockets: Fix GCC 9 build warnings

[Alistair Francis]

Fix this warning when building with GCC9 on Fedora 30:
In function ‘strncpy’,
    inlined from ‘unix_connect_saddr.isra.0’ at util/qemu-sockets.c:925:5:
/usr/include/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ 
specified bound 108 equals destination size [-Werror=stringop-truncation]
  106 |   return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘strncpy’,
    inlined from ‘unix_listen_saddr.isra.0’ at util/qemu-sockets.c:880:5:

Signed-off-by: Alistair Francis <address@hidden>
---
 util/qemu-sockets.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index 9705051690..8c3322958f 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -829,7 +829,7 @@ static int unix_listen_saddr(UnixSocketAddress *saddr,
     struct sockaddr_un un;
     int sock, fd;
     char *pathbuf = NULL;
-    const char *path;
+    const char *path QEMU_NONSTRING;
 
     sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
     if (sock < 0) {
@@ -922,7 +922,7 @@ static int unix_connect_saddr(UnixSocketAddress *saddr, 
Error **errp)
 
     memset(&un, 0, sizeof(un));
     un.sun_family = AF_UNIX;
-    strncpy(un.sun_path, saddr->path, sizeof(un.sun_path));
+    memcpy(un.sun_path, saddr->path, MIN(strlen(saddr->path), 
sizeof(un.sun_path)));
 
     /* connect to peer */
     do {
-- 
2.21.0