bug#39211: [PATCH 1/1] 00-repl-server.test: don't use fixed path for socket

[Rob Browning]

Even setting aside any security concerns, this caused tests to fail if
you ran them as a given user and then ran them again as another user.

---

 It didn't look like we have anything like mkdtemp or I'd have used it
 instead.  And it looks like this might apply to, and it would be nice
 to have something like it on stable-2.2 as well.

 test-suite/tests/00-repl-server.test | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/test-suite/tests/00-repl-server.test 
b/test-suite/tests/00-repl-server.test
index 54f518a66..4324f7371 100644
--- a/test-suite/tests/00-repl-server.test
+++ b/test-suite/tests/00-repl-server.test
@@ -24,13 +24,25 @@
   #:use-module (web request)
   #:use-module (test-suite lib))
 
+(define (make-tempdir)
+  (let loop ((try 0)
+             (n (random:uniform)))
+    (let* ((path (string-append "/tmp/repl-server-test-" (number->string n)))
+           (dir (false-if-exception (mkdir path #o700))))
+      (cond
+       (dir path)
+       ((> try 10)
+        (error "Unable to create directory in /tmp for 00-repl-server.test"))
+       (else (loop (1+ try) (random:uniform)))))))
+
 (define (call-with-repl-server proc)
   "Set up a REPL server in a separate process and call PROC with a
 socket connected to that server."
-  (let ((sockaddr      (make-socket-address AF_UNIX "/tmp/repl-server"))
-        (client-socket (socket AF_UNIX SOCK_STREAM 0)))
-    (false-if-exception
-     (delete-file (sockaddr:path sockaddr)))
+  (let* ((tmpdir (make-tempdir))
+         (sockaddr (make-socket-address AF_UNIX (string-append tmpdir 
"/repl-server")))
+         (client-socket (socket AF_UNIX SOCK_STREAM 0)))
+    (false-if-exception (delete-file (sockaddr:path sockaddr)))
+    (false-if-exception (rmdir tmpdir))
 
     ;; The REPL server requires thread. The test requires fork.
     (unless (and (provided? 'threads) (provided? 'fork))
-- 
2.24.0