Add to the "bigset" writer a `-M` command-line option that enables the use of

multiple files with virtual datasets.

Add to vfd_swmr_create_fapl() printf(3)-like arguments for setting the shadow
filename.  Update all callers.

1 files changed, 9 insertions, 2 deletions

diff --git a/test/vfd_swmr_common.c b/test/vfd_swmr_common.c
index 7b1b550..e4f4889 100644
--- a/test/vfd_swmr_common.c
+++ b/test/vfd_swmr_common.c
@@ -150,6 +150,8 @@ await_signal(hid_t fid)
     if (H5Fflush(fid, H5F_SCOPE_GLOBAL) < 0)
         errx(EXIT_FAILURE, "%s: H5Fflush failed", __func__);
 
+    dbgf(1, "waiting for signal\n");
+
     for (;;) {
         const int rc = sigtimedwait(&sleepset, NULL, &tick);
 
@@ -177,10 +179,12 @@ await_signal(hid_t fid)
 }
 
 hid_t
-vfd_swmr_create_fapl(bool writer, bool only_meta_pages, bool use_vfd_swmr)
+vfd_swmr_create_fapl(bool writer, bool only_meta_pages, bool use_vfd_swmr,
+    const char *mdfile_fmtstr, ...)
 {
     H5F_vfd_swmr_config_t config;
     hid_t fapl;
+    va_list ap;
 
     /* Create file access property list */
     if((fapl = h5_fileaccess()) < 0) {
@@ -211,7 +215,10 @@ vfd_swmr_create_fapl(bool writer, bool only_meta_pages, bool use_vfd_swmr)
     config.max_lag = 7;
     config.writer = writer;
     config.md_pages_reserved = 128;
-    HDstrcpy(config.md_file_path, "./my_md_file");
+    va_start(ap, mdfile_fmtstr);
+    evsnprintf(config.md_file_path, sizeof(config.md_file_path),
+        mdfile_fmtstr, ap);
+    va_end(ap);
 
     /* Enable VFD SWMR configuration */
     if(use_vfd_swmr && H5Pset_vfd_swmr_config(fapl, &config) < 0) {