passthrough: fix unix-domain sockets on FreeBSD (#413)

FreeBSD doesn't allow creating sockets using mknod(2). Instead, one has to use socket(2)
and bind(2).  Add appropriate logic to the examples and add a test case.

1 files changed, 7 insertions, 10 deletions

diff --git a/example/passthrough.c b/example/passthrough.c
index da91930..6de9fc1 100644
--- a/example/passthrough.c
+++ b/example/passthrough.c
@@ -44,11 +44,17 @@
 #include <sys/stat.h>
 #include <dirent.h>
 #include <errno.h>
+#ifdef __FreeBSD__
+#include <sys/socket.h>
+#include <sys/un.h>
+#endif
 #include <sys/time.h>
 #ifdef HAVE_SETXATTR
 #include <sys/xattr.h>
 #endif
 
+#include "passthrough_helpers.h"
+
 static void *xmp_init(struct fuse_conn_info *conn,
 		      struct fuse_config *cfg)
 {
@@ -138,16 +144,7 @@ static int xmp_mknod(const char *path, mode_t mode, dev_t rdev)
 {
 	int res;
 
-	/* On Linux this could just be 'mknod(path, mode, rdev)' but this
-	   is more portable */
-	if (S_ISREG(mode)) {
-		res = open(path, O_CREAT | O_EXCL | O_WRONLY, mode);
-		if (res >= 0)
-			res = close(res);
-	} else if (S_ISFIFO(mode))
-		res = mkfifo(path, mode);
-	else
-		res = mknod(path, mode, rdev);
+	res = mknod_wrapper(AT_FDCWD, path, NULL, mode, rdev);
 	if (res == -1)
 		return -errno;