From: "Daniel P. Berrange" <berrange@redhat.com> Some platforms/toolchains will complain about casting sockaddr_storage to sockaddr_un because it breaks strict aliasing rule ../../src/util/virutil.c: In function 'virGetUNIXSocketPath': ../../src/util/virutil.c:2005: error: dereferencing pointer 'un' does break strict-aliasing rules [-Wstrict-aliasing] Change the code to use a union, in the same way that the virsocketaddr.h header does. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- Pushed as (yet another) CI build fix src/util/virutil.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/src/util/virutil.c b/src/util/virutil.c index c23fa8f92e..cd6fbf2f30 100644 --- a/src/util/virutil.c +++ b/src/util/virutil.c @@ -1985,30 +1985,33 @@ virGetListenFDs(void) #ifdef HAVE_SYS_UN_H char *virGetUNIXSocketPath(int fd) { - struct sockaddr_storage ss = { 0 }; - struct sockaddr_un *un = (struct sockaddr_un *)&ss; - socklen_t len = sizeof(ss); + union { + struct sockaddr sa; + struct sockaddr_storage ss; + struct sockaddr_un un; + } addr = { .ss = { 0 } }; + socklen_t len = sizeof(addr.ss); char *path; - if (getsockname(fd, (struct sockaddr *)&ss, &len) < 0) { + if (getsockname(fd, &addr.sa, &len) < 0) { virReportSystemError(errno, _("Unable to get address of FD %d"), fd); return NULL; } - if (ss.ss_family != AF_UNIX) { + if (addr.ss.ss_family != AF_UNIX) { virReportSystemError(EINVAL, _("FD %d is not a UNIX socket, has af=%d"), - fd, ss.ss_family); + fd, addr.ss.ss_family); return NULL; } - if (un->sun_path[0] == '\0') - un->sun_path[0] = '@'; + if (addr.un.sun_path[0] == '\0') + addr.un.sun_path[0] = '@'; - if (VIR_ALLOC_N(path, sizeof(un->sun_path) + 1) < 0) + if (VIR_ALLOC_N(path, sizeof(addr.un.sun_path) + 1) < 0) return NULL; - memcpy(path, un->sun_path, sizeof(un->sun_path)); - path[sizeof(un->sun_path)] = '\0'; + memcpy(path, addr.un.sun_path, sizeof(addr.un.sun_path)); + path[sizeof(addr.un.sun_path)] = '\0'; return path; } -- 2.14.3