Merge pull request #1677 in HDFFV/hdf5 from ~DEROBINS/hdf5_der:is_accessible_test_love to develop

* commit 'e66bf948a7acba0ddc76239f6d02f17c8b10eb0f':
  Fix for split VFD and file cleanup when testing H5Fis_hdf5 and H5Fis_accessible in tfile.c.
  Improvements to the H5Fis_accessible() and H5Fis_hdf5() tests in tfile.c. * General code tidying. * Expanded tests to work with multi-file VFDs.

6 files changed, 255 insertions, 135 deletions

diff --git a/src/H5FDfamily.c b/src/H5FDfamily.c
index 047fb25..c8893f9 100644
--- a/src/H5FDfamily.c
+++ b/src/H5FDfamily.c
@@ -715,7 +715,7 @@ H5FD_family_open(const char *name, unsigned flags, hid_t fapl_id,
                 (0==file->nmembs ? flags : t_flags), file->memb_fapl_id, HADDR_UNDEF);
         } H5E_END_TRY;
         if (!file->memb[file->nmembs]) {
-            if (0==file->nmembs)
+            if (0 == file->nmembs)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open member file")
             H5E_clear_stack(NULL);
             break;
@@ -723,7 +723,7 @@ H5FD_family_open(const char *name, unsigned flags, hid_t fapl_id,
         file->nmembs++;
     }
 
-    /* If the file is reopened and there's only one member file existing, this file maybe
+    /* If the file is reopened and there's only one member file existing, this file may be
      * smaller than the size specified through H5Pset_fapl_family().  Update the actual
      * member size.
      */
diff --git a/src/H5FDmulti.c b/src/H5FDmulti.c
index fac0909..6cfef55 100644
--- a/src/H5FDmulti.c
+++ b/src/H5FDmulti.c
@@ -981,8 +981,7 @@ H5FD_multi_fapl_free(void *_fa)
  *-------------------------------------------------------------------------
  */
 static H5FD_t *
-H5FD_multi_open(const char *name, unsigned flags, hid_t fapl_id,
-		haddr_t maxaddr)
+H5FD_multi_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr)
 {
     H5FD_multi_t	*file=NULL;
     hid_t		close_fapl=-1;
@@ -996,7 +995,7 @@ H5FD_multi_open(const char *name, unsigned flags, hid_t fapl_id,
     /* Check arguments */
     if (!name || !*name)
         H5Epush_ret(func, H5E_ERR_CLS, H5E_ARGS, H5E_BADVALUE, "invalid file name", NULL)
-    if (0==maxaddr || HADDR_UNDEF==maxaddr)
+    if (0 == maxaddr || HADDR_UNDEF == maxaddr)
         H5Epush_ret(func, H5E_ERR_CLS, H5E_ARGS, H5E_BADRANGE, "bogus maxaddr", NULL)
 
     /*
@@ -1007,41 +1006,41 @@ H5FD_multi_open(const char *name, unsigned flags, hid_t fapl_id,
      */
     if(NULL == (file = (H5FD_multi_t *)calloc((size_t)1, sizeof(H5FD_multi_t))))
         H5Epush_ret(func, H5E_ERR_CLS, H5E_RESOURCE, H5E_NOSPACE, "memory allocation failed", NULL)
-    if(H5P_FILE_ACCESS_DEFAULT==fapl_id || H5FD_MULTI!=H5Pget_driver(fapl_id)) {
+    if(H5P_FILE_ACCESS_DEFAULT == fapl_id || H5FD_MULTI != H5Pget_driver(fapl_id)) {
         close_fapl = fapl_id = H5Pcreate(H5P_FILE_ACCESS);
-        if(H5Pset_fapl_multi(fapl_id, NULL, NULL, NULL, NULL, TRUE)<0)
+        if(H5Pset_fapl_multi(fapl_id, NULL, NULL, NULL, NULL, TRUE) < 0)
             H5Epush_goto(func, H5E_ERR_CLS, H5E_FILE, H5E_CANTSET, "can't set property value", error)
     }
     fa = (const H5FD_multi_fapl_t *)H5Pget_driver_info(fapl_id);
     assert(fa);
     ALL_MEMBERS(mt) {
-	file->fa.memb_map[mt] = fa->memb_map[mt];
-	file->fa.memb_addr[mt] = fa->memb_addr[mt];
-	if (fa->memb_fapl[mt]>=0)
-	    H5Iinc_ref(fa->memb_fapl[mt]);
+        file->fa.memb_map[mt] = fa->memb_map[mt];
+        file->fa.memb_addr[mt] = fa->memb_addr[mt];
+        if (fa->memb_fapl[mt] >= 0)
+            H5Iinc_ref(fa->memb_fapl[mt]);
         file->fa.memb_fapl[mt] = fa->memb_fapl[mt];
-	if (fa->memb_name[mt])
-	    file->fa.memb_name[mt] = my_strdup(fa->memb_name[mt]);
-	else
-	    file->fa.memb_name[mt] = NULL;
+        if (fa->memb_name[mt])
+            file->fa.memb_name[mt] = my_strdup(fa->memb_name[mt]);
+        else
+            file->fa.memb_name[mt] = NULL;
     } END_MEMBERS;
     file->fa.relax = fa->relax;
     file->flags = flags;
     file->name = my_strdup(name);
-    if (close_fapl>=0)
-        if(H5Pclose(close_fapl)<0)
+    if (close_fapl >= 0)
+        if(H5Pclose(close_fapl) < 0)
             H5Epush_goto(func, H5E_ERR_CLS, H5E_FILE, H5E_CANTCLOSEOBJ, "can't close property list", error)
 
     /* Compute derived properties and open member files */
-    if (compute_next(file)<0)
+    if (compute_next(file) < 0)
         H5Epush_goto(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "compute_next() failed", error);
-    if (open_members(file)<0)
+    if (open_members(file) < 0)
         H5Epush_goto(func, H5E_ERR_CLS, H5E_INTERNAL, H5E_BADVALUE, "open_members() failed", error);
 
     /* We must have opened at least the superblock file */
-    if (H5FD_MEM_DEFAULT==(m=file->fa.memb_map[H5FD_MEM_SUPER]))
+    if (H5FD_MEM_DEFAULT == (m = file->fa.memb_map[H5FD_MEM_SUPER]))
         m = H5FD_MEM_SUPER;
-    if (NULL==file->memb[m])
+    if (NULL == file->memb[m])
         goto error;
 
     return (H5FD_t*)file;
@@ -1049,13 +1048,14 @@ H5FD_multi_open(const char *name, unsigned flags, hid_t fapl_id,
 error:
     /* Cleanup and fail */
     if (file) {
-	ALL_MEMBERS(mt) {
-	    if (file->memb[mt]) (void)H5FDclose(file->memb[mt]);
-	    if (file->fa.memb_fapl[mt]>=0) (void)H5Idec_ref(file->fa.memb_fapl[mt]);
-	    if (file->fa.memb_name[mt]) free(file->fa.memb_name[mt]);
-	} END_MEMBERS;
-	if (file->name) free(file->name);
-	free(file);
+        ALL_MEMBERS(mt) {
+            if (file->memb[mt]) (void)H5FDclose(file->memb[mt]);
+            if (file->fa.memb_fapl[mt] >= 0) (void)H5Idec_ref(file->fa.memb_fapl[mt]);
+            if (file->fa.memb_name[mt]) free(file->fa.memb_name[mt]);
+        } END_MEMBERS;
+        if (file->name)
+            free(file->name);
+        free(file);
     }
     return NULL;
 }
diff --git a/src/H5Fint.c b/src/H5Fint.c
index 5d03b3b..2e8771c 100644
--- a/src/H5Fint.c
+++ b/src/H5Fint.c
@@ -853,7 +853,7 @@ htri_t
 H5F__is_hdf5(const char *name, hid_t fapl_id)
 {
     H5FD_t         *file = NULL;            /* Low-level file struct                    */
-    haddr_t         sig_addr;               /* Addess of hdf5 file signature            */
+    haddr_t         sig_addr = HADDR_UNDEF; /* Addess of hdf5 file signature            */
     htri_t          ret_value = FAIL;       /* Return value                             */
 
     FUNC_ENTER_PACKAGE
diff --git a/test/h5test.c b/test/h5test.c
index 8634a4d..dba8cf7 100644
--- a/test/h5test.c
+++ b/test/h5test.c
@@ -115,8 +115,8 @@ const char *LIBVER_NAMES[] = {
 static H5E_auto2_t err_func = NULL;
 
 static herr_t h5_errors(hid_t estack, void *client_data);
-static char * h5_fixname_real(const char *base_name, hid_t fapl, const char *suffix, 
-                              char *fullname, size_t size, hbool_t nest_printf);
+static char *h5_fixname_real(const char *base_name, hid_t fapl, const char *_suffix, 
+    char *fullname, size_t size, hbool_t nest_printf, hbool_t subst_for_superblock);
 
 
 /*-------------------------------------------------------------------------
@@ -471,7 +471,33 @@ h5_test_init(void)
 char *
 h5_fixname(const char *base_name, hid_t fapl, char *fullname, size_t size)
 {
-    return (h5_fixname_real(base_name, fapl, ".h5", fullname, size, FALSE));
+    return (h5_fixname_real(base_name, fapl, ".h5", fullname, size, FALSE, FALSE));
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:    h5_fixname_superblock
+ *
+ * Purpose:     Like h5_fixname() but returns the name of the file you'd
+ *              open to find the superblock. Useful for when you have to
+ *              open a file with open(2) but the h5_fixname() string
+ *              contains stuff like format strings.
+ *
+ * Return:      Success:    The FULLNAME pointer.
+ *
+ *              Failure:    NULL if BASENAME or FULLNAME is the null
+ *                          pointer or if FULLNAME isn't large enough for
+ *                          the result.
+ *
+ * Programmer:  Dana Robinson
+ *              Spring 2019
+ *
+ *-------------------------------------------------------------------------
+ */
+char *
+h5_fixname_superblock(const char *base_name, hid_t fapl_id, char *fullname, size_t size)
+{
+    return (h5_fixname_real(base_name, fapl_id, ".h5", fullname, size, FALSE, TRUE));
 }
 
 
@@ -491,7 +517,7 @@ h5_fixname(const char *base_name, hid_t fapl, char *fullname, size_t size)
 char *
 h5_fixname_no_suffix(const char *base_name, hid_t fapl, char *fullname, size_t size)
 {
-    return (h5_fixname_real(base_name, fapl, NULL, fullname, size, FALSE));
+    return (h5_fixname_real(base_name, fapl, NULL, fullname, size, FALSE, FALSE));
 }
 
 
@@ -517,7 +543,7 @@ h5_fixname_no_suffix(const char *base_name, hid_t fapl, char *fullname, size_t s
 char *
 h5_fixname_printf(const char *base_name, hid_t fapl, char *fullname, size_t size)
 {
-    return (h5_fixname_real(base_name, fapl, ".h5", fullname, size, TRUE));
+    return (h5_fixname_real(base_name, fapl, ".h5", fullname, size, TRUE, FALSE));
 }
 
 
@@ -545,9 +571,10 @@ h5_fixname_printf(const char *base_name, hid_t fapl, char *fullname, size_t size
  */
 static char *
 h5_fixname_real(const char *base_name, hid_t fapl, const char *_suffix, 
-                char *fullname, size_t size, hbool_t nest_printf)
+    char *fullname, size_t size, hbool_t nest_printf, hbool_t subst_for_superblock)
 {
     const char     *prefix = NULL;
+    const char     *env = NULL;    /* HDF5_DRIVER environment variable     */
     char           *ptr, last = '\0';
     const char     *suffix = _suffix;
     size_t          i, j;
@@ -565,17 +592,46 @@ h5_fixname_real(const char *base_name, hid_t fapl, const char *_suffix,
             return NULL;
 
         if(suffix) {
-            if(H5FD_FAMILY == driver)
-                suffix = nest_printf ? "%%05d.h5" : "%05d.h5";
-            else if (H5FD_MULTI == driver)
-                suffix = NULL;
+            if(H5FD_FAMILY == driver) {
+                if(subst_for_superblock)
+                    suffix = "00000.h5";
+                else
+                    suffix = nest_printf ? "%%05d.h5" : "%05d.h5";
+            }
+            else if (H5FD_MULTI == driver) {
+
+                /* Get the environment variable, if it exists, in case
+                 * we are using the split driver since both of those
+                 * use the multi VFD under the hood.
+                 */
+                env = HDgetenv("HDF5_DRIVER");
+#ifdef HDF5_DRIVER
+                /* Use the environment variable, then the compile-time constant */
+                if(!env)
+                    env = HDF5_DRIVER;
+#endif
+                if(!HDstrcmp(env, "split")) {
+                    /* split VFD */
+                    if(subst_for_superblock)
+                        suffix = "-m.h5";
+                    else
+                        suffix = NULL;
+                }
+                else {
+                    /* multi VFD */
+                    if(subst_for_superblock)
+                        suffix = "-s.h5";
+                    else
+                        suffix = NULL;
+                }
+            }
         }
     }
 
     /* Must first check fapl is not H5P_DEFAULT (-1) because H5FD_XXX
      * could be of value -1 if it is not defined.
      */
-    isppdriver = H5P_DEFAULT != fapl && (H5FD_MPIO==driver);
+    isppdriver = H5P_DEFAULT != fapl && (H5FD_MPIO == driver);
 
     /* Check HDF5_NOCLEANUP environment setting.
      * (The #ifdef is needed to prevent compile failure in case MPI is not
diff --git a/test/h5test.h b/test/h5test.h
index ada52ad..448813e 100644
--- a/test/h5test.h
+++ b/test/h5test.h
@@ -133,6 +133,7 @@ extern "C" {
 H5TEST_DLL void h5_clean_files(const char *base_name[], hid_t fapl);
 H5TEST_DLL int h5_cleanup(const char *base_name[], hid_t fapl);
 H5TEST_DLL char *h5_fixname(const char *base_name, hid_t fapl, char *fullname, size_t size);
+H5TEST_DLL char *h5_fixname_superblock(const char *base_name, hid_t fapl, char *fullname, size_t size);
 H5TEST_DLL char *h5_fixname_no_suffix(const char *base_name, hid_t fapl, char *fullname, size_t size);
 H5TEST_DLL char *h5_fixname_printf(const char *base_name, hid_t fapl, char *fullname, size_t size);
 H5TEST_DLL hid_t h5_fileaccess(void);
diff --git a/test/tfile.c b/test/tfile.c
index acf2bd6..695d437 100644
--- a/test/tfile.c
+++ b/test/tfile.c
@@ -1594,54 +1594,72 @@ test_file_perm2(void)
 **      H5Fis_accessible() API call.
 **
 *****************************************************************/
+#define FILE_IS_ACCESSIBLE  "tfile_is_accessible"
 static void
 test_file_is_accessible(const char *env_h5_drvr)
 {
-    hid_t    fid;               /* File opened with read-write permission */
-    hid_t    fcpl_id;           /* File creation property list */
-    hid_t    fapl = -1;         /* File access property list */
-    int      fd;                /* POSIX file descriptor */
-    char filename[FILENAME_LEN]; /* Filename to use */
-    ssize_t  nbytes;            /* Number of bytes written */
-    unsigned u;                 /* Local index variable */
-    unsigned char buf[1024];    /* Buffer of data to write */
-    htri_t   status;            /* Whether a file is an HDF5 file */
-    hbool_t  single_file_vfd;   /* Whether VFD used is a single file */
-    herr_t   ret;
+    hid_t           fid = H5I_INVALID_HID;          /* File opened with read-write permission */
+    hid_t           fcpl_id = H5I_INVALID_HID;      /* File creation property list */
+    hid_t           fapl_id = H5I_INVALID_HID;      /* File access property list */
+    int             fd;                             /* POSIX file descriptor */
+    char filename[FILENAME_LEN];                    /* Filename to use */
+    char sb_filename[FILENAME_LEN];                 /* Name of file w/ superblock */
+    ssize_t         nbytes;                         /* Number of bytes written */
+    unsigned        u;                              /* Local index variable */
+    unsigned char   buf[1024];                      /* Buffer of data to write */
+    htri_t          is_hdf5;                        /* Whether a file is an HDF5 file */
+    int             posix_ret;                      /* Return value from POSIX calls */
+    herr_t          ret;                            /* Return value from HDF5 calls */
 
     /* Output message about test being performed */
     MESSAGE(5, ("Testing Detection of HDF5 Files\n"));
 
     /* Get FAPL */
-    fapl = h5_fileaccess();
-    CHECK(fapl, FAIL, "H5Pcreate");
-    h5_fixname(FILE1, fapl, filename, sizeof filename);
+    fapl_id = h5_fileaccess();
+    CHECK(fapl_id, H5I_INVALID_HID, "H5Pcreate");
+
+    /* Fix up filenames
+     * For VFDs that create multiple files, we also need the name
+     * of the file with the superblock. With single-file VFDs, this
+     * will be equal to the one from h5_fixname().
+     */
+    h5_fixname(FILE_IS_ACCESSIBLE, fapl_id, filename, sizeof(filename));
+    h5_fixname_superblock(FILE_IS_ACCESSIBLE, fapl_id, sb_filename, sizeof(filename));
+
+    /****************/
+    /* Normal usage */
+    /****************/
 
     /* Create a file */
-    fid = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl);
-    CHECK(fid, FAIL, "H5Fcreate");
+    fid = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
+    CHECK(fid, H5I_INVALID_HID, "H5Fcreate");
 
     /* Close file */
     ret = H5Fclose(fid);
     CHECK(ret, FAIL, "H5Fclose");
 
     /* Verify that the file is an HDF5 file */
-    status = H5Fis_accessible(filename, fapl);
-    VERIFY(status, TRUE, "H5Fis_accessible");
+    is_hdf5 = H5Fis_accessible(filename, fapl_id);
+    VERIFY(is_hdf5, TRUE, "H5Fis_accessible");
 
+    /*******************************/
+    /* Non-default user block size */
+    /*******************************/
 
-    /* This test is not currently working for the family VFD */
+    /* This test is not currently working for the family VFD.
+     * There are failures when creating files with userblocks.
+     */
     if(0 != HDstrcmp(env_h5_drvr, "family")) {
         /* Create a file creation property list with a non-default user block size */
         fcpl_id = H5Pcreate(H5P_FILE_CREATE);
-        CHECK(fcpl_id, FAIL, "H5Pcreate");
+        CHECK(fcpl_id, H5I_INVALID_HID, "H5Pcreate");
 
         ret = H5Pset_userblock(fcpl_id, (hsize_t)2048);
         CHECK(ret, FAIL, "H5Pset_userblock");
 
         /* Create file with non-default user block */
-        fid = H5Fcreate(filename, H5F_ACC_TRUNC, fcpl_id, fapl);
-        CHECK(fid, FAIL, "H5Fcreate");
+        fid = H5Fcreate(filename, H5F_ACC_TRUNC, fcpl_id, fapl_id);
+        CHECK(fid, H5I_INVALID_HID, "H5Fcreate");
 
         /* Release file-creation property list */
         ret = H5Pclose(fcpl_id);
@@ -1652,37 +1670,56 @@ test_file_is_accessible(const char *env_h5_drvr)
         CHECK(ret, FAIL, "H5Fclose");
 
         /* Verify that the file is an HDF5 file */
-        status = H5Fis_accessible(filename, fapl);
-        VERIFY(status, TRUE, "H5Fis_accessible");
+        is_hdf5 = H5Fis_accessible(filename, fapl_id);
+        VERIFY(is_hdf5, TRUE, "H5Fis_accessible");
     } /* end if */
 
+    /***********************/
+    /* EMPTY non-HDF5 file */
+    /***********************/
 
-    /* This test only works for VFDs with a single file */
-    single_file_vfd = (hbool_t)(HDstrcmp(env_h5_drvr, "split") && HDstrcmp(env_h5_drvr, "multi") && HDstrcmp(env_h5_drvr, "family"));
-    if(single_file_vfd) {
-        /* Create non-HDF5 file and check it */
-        fd = HDopen(filename, O_RDWR|O_CREAT|O_TRUNC, H5_POSIX_CREATE_MODE_RW);
-        CHECK(fd, FAIL, "HDopen");
+    /* Create non-HDF5 file and check it */
+    fd = HDopen(sb_filename, O_RDWR | O_CREAT | O_TRUNC, H5_POSIX_CREATE_MODE_RW);
+    CHECK(fd, (-1), "HDopen");
 
-        /* Initialize information to write */
-        for (u=0; u<1024; u++)
-            buf[u]=(unsigned char)u;
+    /* Close the file */
+    posix_ret = HDclose(fd);
+    CHECK(posix_ret, (-1), "HDclose");
 
-        /* Write some information */
-        nbytes = HDwrite(fd, buf, (size_t)1024);
-        VERIFY(nbytes, 1024, "HDwrite");
+    /* Verify that the file is NOT an HDF5 file */
+    is_hdf5 = H5Fis_accessible(filename, fapl_id);
+    VERIFY(is_hdf5, FALSE, "H5Fis_accessible (empty non-HDF5 file)");
 
-        /* Close the file */
-        ret = HDclose(fd);
-        CHECK(ret, FAIL, "HDclose");
+    /***************************/
+    /* Non-empty non-HDF5 file */
+    /***************************/
 
-        /* Verify that the file is not an HDF5 file */
-        status = H5Fis_accessible(filename, fapl);
-        VERIFY(status, FALSE, "H5Fis_accessible");
-    } /* end if */
+    /* Create non-HDF5 file and check it */
+    fd = HDopen(sb_filename, O_RDWR | O_CREAT | O_TRUNC, H5_POSIX_CREATE_MODE_RW);
+    CHECK(fd, (-1), "HDopen");
+
+    /* Initialize information to write */
+    for (u = 0; u < 1024; u++)
+        buf[u]=(unsigned char)u;
+
+    /* Write some information */
+    nbytes = HDwrite(fd, buf, (size_t)1024);
+    VERIFY(nbytes, 1024, "HDwrite");
+
+    /* Close the file */
+    posix_ret = HDclose(fd);
+    CHECK(posix_ret, (-1), "HDclose");
+
+    /* Verify that the file is not an HDF5 file */
+    is_hdf5 = H5Fis_accessible(filename, fapl_id);
+    VERIFY(is_hdf5, FALSE, "H5Fis_accessible (non-HDF5 file)");
+
+
+    /* Clean up files */
+    h5_delete_test_file(filename, fapl_id);
 
     /* Close property list */
-    ret = H5Pclose(fapl);
+    ret = H5Pclose(fapl_id);
     CHECK(ret, FAIL, "H5Pclose");
 
 } /* end test_file_is_accessible() */
@@ -1697,70 +1734,97 @@ test_file_is_accessible(const char *env_h5_drvr)
 *****************************************************************/
 #ifndef H5_NO_DEPRECATED_SYMBOLS
 static void
-test_file_ishdf5(void)
+test_file_ishdf5(const char *env_h5_drvr)
 {
-    hid_t    file;      /* File opened with read-write permission */
-    hid_t    fcpl;      /* File creation property list */
-    hid_t    fapl = -1; /* File access property list */
-    int      fd;        /* File Descriptor */
-    char filename[FILENAME_LEN]; /* Filename to use */
-    ssize_t  nbytes;    /* Number of bytes written */
-    unsigned u;         /* Local index variable */
-    unsigned char buf[1024];    /* Buffer of data to write */
-    htri_t   status;    /* Whether a file is an HDF5 file */
-    herr_t   ret;
+    hid_t           fid = H5I_INVALID_HID;          /* File opened with read-write permission */
+    hid_t           fcpl_id = H5I_INVALID_HID;      /* File creation property list */
+    hid_t           fapl_id = H5I_INVALID_HID;      /* File access property list */
+    int             fd;                             /* POSIX file descriptor */
+    char filename[FILENAME_LEN];                    /* Filename to use */
+    char sb_filename[FILENAME_LEN];                 /* Name of file w/ superblock */
+    ssize_t         nbytes;                         /* Number of bytes written */
+    unsigned        u;                              /* Local index variable */
+    unsigned char   buf[1024];                      /* Buffer of data to write */
+    htri_t          is_hdf5;                        /* Whether a file is an HDF5 file */
+    int             posix_ret;                      /* Return value from POSIX calls */
+    herr_t          ret;                            /* Return value from HDF5 calls */
 
     /* Output message about test being performed */
     MESSAGE(5, ("Testing Detection of HDF5 Files (using deprecated H5Fis_hdf5() call)\n"));
 
     /* Get FAPL */
-    fapl = h5_fileaccess();
-    CHECK(fapl, FAIL, "H5Pcreate");
-    h5_fixname(FILE1, fapl, filename, sizeof filename);
+    fapl_id = h5_fileaccess();
+    CHECK(fapl_id, H5I_INVALID_HID, "H5Pcreate");
+
+    /* Fix up filenames
+     * For VFDs that create multiple files, we also need the name
+     * of the file with the superblock. With single-file VFDs, this
+     * will be equal to the one from h5_fixname().
+     */
+    h5_fixname(FILE_IS_ACCESSIBLE, fapl_id, filename, sizeof(filename));
+    h5_fixname_superblock(FILE_IS_ACCESSIBLE, fapl_id, sb_filename, sizeof(filename));
+
+    /****************/
+    /* Normal usage */
+    /****************/
 
     /* Create a file */
-    file = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl);
-    CHECK(file, FAIL, "H5Fcreate");
+    fid = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl_id);
+    CHECK(fid, H5I_INVALID_HID, "H5Fcreate");
 
     /* Close file */
-    ret = H5Fclose(file);
+    ret = H5Fclose(fid);
     CHECK(ret, FAIL, "H5Fclose");
 
     /* Verify that the file is an HDF5 file */
-    status = H5Fis_hdf5(filename);
-    VERIFY(status, TRUE, "H5Fis_hdf5");
+    is_hdf5 = H5Fis_hdf5(sb_filename);
+    VERIFY(is_hdf5, TRUE, "H5Fis_hdf5");
 
+    /*******************************/
+    /* Non-default user block size */
+    /*******************************/
 
-    /* Create a file creation property list with a non-default user block size */
-    fcpl = H5Pcreate(H5P_FILE_CREATE);
-    CHECK(fcpl, FAIL, "H5Pcreate");
+    /* This test is not currently working for the family VFD.
+     * There are failures when creating files with userblocks.
+     */
+    if(0 != HDstrcmp(env_h5_drvr, "family")) {
+        /* Create a file creation property list with a non-default user block size */
+        fcpl_id = H5Pcreate(H5P_FILE_CREATE);
+        CHECK(fcpl_id, H5I_INVALID_HID, "H5Pcreate");
 
-    ret = H5Pset_userblock(fcpl, (hsize_t)2048);
-    CHECK(ret, FAIL, "H5Pset_userblock");
+        ret = H5Pset_userblock(fcpl_id, (hsize_t)2048);
+        CHECK(ret, FAIL, "H5Pset_userblock");
 
-    /* Create file with non-default user block */
-    file = H5Fcreate(filename, H5F_ACC_TRUNC, fcpl, fapl);
-    CHECK(file, FAIL, "H5Fcreate");
+        /* Create file with non-default user block */
+        fid = H5Fcreate(filename, H5F_ACC_TRUNC, fcpl_id, fapl_id);
+        CHECK(fid, H5I_INVALID_HID, "H5Fcreate");
 
-    /* Release file-creation property list */
-    ret = H5Pclose(fcpl);
-    CHECK(ret, FAIL, "H5Pclose");
+        /* Release file creation property list */
+        ret = H5Pclose(fcpl_id);
+        CHECK(ret, FAIL, "H5Pclose");
 
-    /* Close file */
-    ret = H5Fclose(file);
-    CHECK(ret, FAIL, "H5Fclose");
+        /* Close file */
+        ret = H5Fclose(fid);
+        CHECK(ret, FAIL, "H5Fclose");
 
-    /* Verify that the file is an HDF5 file */
-    status = H5Fis_hdf5(filename);
-    VERIFY(status, TRUE, "H5Fis_hdf5");
+        /* Verify that the file is an HDF5 file */
+        is_hdf5 = H5Fis_hdf5(sb_filename);
+        VERIFY(is_hdf5, TRUE, "H5Fis_hdf5");
+    } /* end if */
 
+    /***************************/
+    /* Non-empty non-HDF5 file */
+    /***************************/
 
-    /* Create non-HDF5 file and check it */
-    fd = HDopen(filename, O_RDWR|O_CREAT|O_TRUNC, H5_POSIX_CREATE_MODE_RW);
-    CHECK(fd, FAIL, "HDopen");
+    /* Create non-HDF5 file. Use the calculated superblock
+     * filename to avoid the format strings that will make
+     * open(2) sad.
+     */
+    fd = HDopen(sb_filename, O_RDWR | O_CREAT | O_TRUNC, H5_POSIX_CREATE_MODE_RW);
+    CHECK(fd, (-1), "HDopen");
 
     /* Initialize information to write */
-    for(u=0; u<1024; u++)
+    for(u = 0; u < 1024; u++)
         buf[u]=(unsigned char)u;
 
     /* Write some information */
@@ -1768,15 +1832,19 @@ test_file_ishdf5(void)
     VERIFY(nbytes, 1024, "HDwrite");
 
     /* Close the file */
-    ret = HDclose(fd);
-    CHECK(ret, FAIL, "HDclose");
+    posix_ret = HDclose(fd);
+    CHECK(posix_ret, (-1), "HDclose");
 
     /* Verify that the file is not an HDF5 file */
-    status = H5Fis_hdf5(filename);
-    VERIFY(status, FALSE, "H5Fis_hdf5");
+    is_hdf5 = H5Fis_hdf5(sb_filename);
+    VERIFY(is_hdf5, FALSE, "H5Fis_hdf5");
+
+
+    /* Clean up files */
+    h5_delete_test_file(filename, fapl_id);
 
     /* Close property list */
-    ret = H5Pclose(fapl);
+    ret = H5Pclose(fapl_id);
     CHECK(ret, FAIL, "H5Pclose");
 
 } /* end test_file_ishdf5() */
@@ -7537,7 +7605,6 @@ test_deprec(void)
 void
 test_file(void)
 {
-    hbool_t  single_file_vfd;   /* Whether VFD used is a single file */
     const char  *env_h5_drvr;         /* File Driver value from environment */
 
     /* Output message about test being performed */
@@ -7547,7 +7614,6 @@ test_file(void)
     env_h5_drvr = HDgetenv("HDF5_DRIVER");
     if(env_h5_drvr == NULL)
         env_h5_drvr = "nomatch";
-    single_file_vfd = (hbool_t)(HDstrcmp(env_h5_drvr, "split") && HDstrcmp(env_h5_drvr, "multi") && HDstrcmp(env_h5_drvr, "family"));
 
     test_file_create();                         /* Test file creation(also creation templates)*/
     test_file_open();                           /* Test file opening */
@@ -7593,10 +7659,7 @@ test_file(void)
     test_incr_filesize();                       /* Test H5Fincrement_filesize() and H5Fget_eoa() */
     test_min_dset_ohdr();                       /* Test datset object header minimization */
 #ifndef H5_NO_DEPRECATED_SYMBOLS
-    if(single_file_vfd)
-        test_file_ishdf5();                         /* Test detecting HDF5 files correctly */
-    else
-        MESSAGE(5, ("Skipping testing detection of HDF5 Files (using deprecated H5Fis_hdf5() call for non-single file VFDs)\n"));
+    test_file_ishdf5(env_h5_drvr);              /* Test detecting HDF5 files correctly */
     test_deprec();                              /* Test deprecated routines */
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 } /* test_file() */