Problem: tests use same IPC endpoint

Solution: use either a wildcard IPC, or where the codepath needs to
be tested a file named after the test, so that it is unique and there
is no clash on the filesystem, allowing parallel test runs.

tests/test_pair_ipc.cpp

@@ -37,12 +37,12 @@ int main (void)
 
     void *sb = zmq_socket (ctx, ZMQ_PAIR);
     assert (sb);
-    int rc = zmq_bind (sb, "ipc:///tmp/tester");
+    int rc = zmq_bind (sb, "ipc:///tmp/test_pair_ipc");
     assert (rc == 0);
 
     void *sc = zmq_socket (ctx, ZMQ_PAIR);
     assert (sc);
-    rc = zmq_connect (sc, "ipc:///tmp/tester");
+    rc = zmq_connect (sc, "ipc:///tmp/test_pair_ipc");
     assert (rc == 0);
     
     bounce (sb, sc);

tests/test_reqrep_ipc.cpp

 /*
-    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
+    Copyright (c) 2007-2017 Contributors as noted in the AUTHORS file
 
     This file is part of libzmq, the ZeroMQ core engine in C++.
 
@@ -32,17 +32,21 @@
 int main (void)
 {
     setup_test_environment();
+    char my_endpoint[256];
     void *ctx = zmq_ctx_new ();
     assert (ctx);
 
     void *sb = zmq_socket (ctx, ZMQ_REP);
     assert (sb);
-    int rc = zmq_bind (sb, "ipc:///tmp/tester");
+    int rc = zmq_bind (sb, "ipc://*");
+    assert (rc == 0);
+    size_t len = sizeof(my_endpoint);
+    rc = zmq_getsockopt (sb, ZMQ_LAST_ENDPOINT, my_endpoint, &len);
     assert (rc == 0);
 
     void *sc = zmq_socket (ctx, ZMQ_REQ);
     assert (sc);
-    rc = zmq_connect (sc, "ipc:///tmp/tester");
+    rc = zmq_connect (sc, my_endpoint);
     assert (rc == 0);
     
     bounce (sb, sc);

tests/test_use_fd_ipc.cpp

@@ -64,14 +64,14 @@ void test_req_rep ()
     void *sb = zmq_socket (ctx, ZMQ_REP);
     assert (sb);
 
-    pre_allocate_sock(sb, "/tmp/tester");
+    pre_allocate_sock(sb, "/tmp/test_use_fd_ipc");
 
-    int rc = zmq_bind (sb, "ipc:///tmp/tester");
+    int rc = zmq_bind (sb, "ipc:///tmp/test_use_fd_ipc");
     assert (rc == 0);
 
     void *sc = zmq_socket (ctx, ZMQ_REQ);
     assert (sc);
-    rc = zmq_connect (sc, "ipc:///tmp/tester");
+    rc = zmq_connect (sc, "ipc:///tmp/test_use_fd_ipc");
     assert (rc == 0);
 
     bounce (sb, sc);
@@ -85,7 +85,7 @@ void test_req_rep ()
     rc = zmq_ctx_term (ctx);
     assert (rc == 0);
 
-    rc = unlink ("/tmp/tester");
+    rc = unlink ("/tmp/test_use_fd_ipc");
     assert (rc == 0);
 }
 
@@ -97,14 +97,14 @@ void test_pair ()
     void *sb = zmq_socket (ctx, ZMQ_PAIR);
     assert (sb);
 
-    pre_allocate_sock(sb, "/tmp/tester");
+    pre_allocate_sock(sb, "/tmp/test_use_fd_ipc");
 
-    int rc = zmq_bind (sb, "ipc:///tmp/tester");
+    int rc = zmq_bind (sb, "ipc:///tmp/test_use_fd_ipc");
     assert (rc == 0);
 
     void *sc = zmq_socket (ctx, ZMQ_PAIR);
     assert (sc);
-    rc = zmq_connect (sc, "ipc:///tmp/tester");
+    rc = zmq_connect (sc, "ipc:///tmp/test_use_fd_ipc");
     assert (rc == 0);
 
     bounce (sb, sc);
@@ -118,7 +118,7 @@ void test_pair ()
     rc = zmq_ctx_term (ctx);
     assert (rc == 0);
 
-    rc = unlink ("/tmp/tester");
+    rc = unlink ("/tmp/test_use_fd_ipc");
     assert (rc == 0);
 }
 
@@ -131,14 +131,14 @@ void test_client_server ()
     void *sb = zmq_socket (ctx, ZMQ_SERVER);
     assert (sb);
 
-    pre_allocate_sock(sb, "/tmp/tester");
+    pre_allocate_sock(sb, "/tmp/test_use_fd_ipc");
 
-    int rc = zmq_bind (sb, "ipc:///tmp/tester");
+    int rc = zmq_bind (sb, "ipc:///tmp/test_use_fd_ipc");
     assert (rc == 0);
 
     void *sc = zmq_socket (ctx, ZMQ_CLIENT);
     assert (sc);
-    rc = zmq_connect (sc, "ipc:///tmp/tester");
+    rc = zmq_connect (sc, "ipc:///tmp/test_use_fd_ipc");
     assert (rc == 0);
 
     zmq_msg_t msg;
@@ -199,7 +199,7 @@ void test_client_server ()
     rc = zmq_ctx_term (ctx);
     assert (rc == 0);
 
-    rc = unlink ("/tmp/tester");
+    rc = unlink ("/tmp/test_use_fd_ipc");
     assert (rc == 0);
 #endif
 }