Singletons need to create their own session directory tree

We currently define the names of the various session directory
tree levels, but we never actually create those locations. This
causes (among other things) the shmem subsystem to emit error
messages about directories not being found or that we are
unable to determine if adequate size is available.

Refs #12784

Signed-off-by: Ralph Castain <[email protected]>
(cherry picked from commit 9b8a417)

Author: rhc54

ompi/runtime/ompi_rte.c

@@ -14,7 +14,7 @@
  *                         and Technology (RIST).  All rights reserved.
  * Copyright (c) 2020      Amazon.com, Inc. or its affiliates.  All Rights
  *                         reserved.
- * Copyright (c) 2021-2022 Nanook Consulting.  All rights reserved.
+ * Copyright (c) 2021-2025 Nanook Consulting  All rights reserved.
  * Copyright (c) 2021-2022 IBM Corporation.  All rights reserved.
  * $COPYRIGHT$
  */
@@ -69,6 +69,7 @@ opal_process_name_t pmix_name_invalid = {UINT32_MAX, UINT32_MAX};
  * session directory structure, then we shall cleanup after ourselves.
  */
 static bool destroy_job_session_dir = false;
+static bool destroy_proc_session_dir = false;
 
 static int _setup_top_session_dir(char **sdir);
 static int _setup_job_session_dir(char **sdir);
@@ -995,9 +996,12 @@ int ompi_rte_finalize(void)
         opal_process_info.top_session_dir = NULL;
     }
 
-    if (NULL != opal_process_info.proc_session_dir) {
+    if (NULL != opal_process_info.proc_session_dir && destroy_proc_session_dir) {
+        opal_os_dirpath_destroy(opal_process_info.proc_session_dir,
+                                false, check_file);
         free(opal_process_info.proc_session_dir);
         opal_process_info.proc_session_dir = NULL;
+        destroy_proc_session_dir = false;
     }
 
     if (NULL != opal_process_info.app_sizes) {
@@ -1174,6 +1178,7 @@ static int _setup_top_session_dir(char **sdir)
 
 static int _setup_job_session_dir(char **sdir)
 {
+    int rc;
     /* get the effective uid */
     uid_t uid = geteuid();
 
@@ -1185,18 +1190,34 @@ static int _setup_job_session_dir(char **sdir)
         opal_process_info.job_session_dir = NULL;
         return OPAL_ERR_OUT_OF_RESOURCE;
     }
+    rc = opal_os_dirpath_create(opal_process_info.job_session_dir, 0755);
+    if (OPAL_SUCCESS != rc) {
+        // could not create session dir
+        free(opal_process_info.job_session_dir);
+        opal_process_info.job_session_dir = NULL;
+        return rc;
+    }
     destroy_job_session_dir = true;
     return OPAL_SUCCESS;
 }
 
 static int _setup_proc_session_dir(char **sdir)
 {
+    int rc;
+
     if (0 > opal_asprintf(sdir,  "%s/%d",
                           opal_process_info.job_session_dir,
                           opal_process_info.my_name.vpid)) {
         opal_process_info.proc_session_dir = NULL;
         return OPAL_ERR_OUT_OF_RESOURCE;
     }
-
+    rc = opal_os_dirpath_create(opal_process_info.proc_session_dir, 0755);
+    if (OPAL_SUCCESS != rc) {
+        // could not create session dir
+        free(opal_process_info.proc_session_dir);
+        opal_process_info.proc_session_dir = NULL;
+        return rc;
+    }
+    destroy_proc_session_dir = true;
     return OPAL_SUCCESS;
 }