Minor typo - init the job_data stdin_target field to 0 for default behavior. Add test.

.gitignore

@@ -403,6 +403,7 @@ orte/test/mpi/thread_init
 orte/test/mpi/memcached-dummy
 orte/test/mpi/coll_test
 orte/test/mpi/badcoll
+orte/test/mpi/iof
 
 orte/test/system/radix
 orte/test/system/sigusr_trap

orte/runtime/orte_globals.c

@@ -624,7 +624,7 @@ static void orte_job_construct(orte_job_t* job)
                             ORTE_GLOBAL_ARRAY_MAX_SIZE,
                             2);
     job->num_apps = 0;
-    job->stdin_target = ORTE_VPID_INVALID;
+    job->stdin_target = 0;
     job->total_slots_alloc = 0;
     job->num_procs = 0;
     job->procs = OBJ_NEW(opal_pointer_array_t);

orte/test/mpi/Makefile

@@ -1,4 +1,4 @@
-PROGS = mpi_no_op mpi_barrier hello hello_nodename abort multi_abort simple_spawn concurrent_spawn spawn_multiple mpi_spin delayed_abort loop_spawn loop_child bad_exit pubsub hello_barrier segv accept connect hello_output hello_show_help crisscross read_write ziatest slave reduce-hang ziaprobe ziatest bcast_loop parallel_w8 parallel_w64 parallel_r8 parallel_r64 sio sendrecv_blaster early_abort debugger singleton_client_server intercomm_create spawn_tree init-exit77 mpi_info info_spawn server client paccept pconnect ring hello.sapp binding badcoll
+PROGS = mpi_no_op mpi_barrier hello hello_nodename abort multi_abort simple_spawn concurrent_spawn spawn_multiple mpi_spin delayed_abort loop_spawn loop_child bad_exit pubsub hello_barrier segv accept connect hello_output hello_show_help crisscross read_write ziatest slave reduce-hang ziaprobe ziatest bcast_loop parallel_w8 parallel_w64 parallel_r8 parallel_r64 sio sendrecv_blaster early_abort debugger singleton_client_server intercomm_create spawn_tree init-exit77 mpi_info info_spawn server client paccept pconnect ring hello.sapp binding badcoll iof
 
 all: $(PROGS)
 

orte/test/mpi/iof.c

@@ -0,0 +1,65 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <mpi.h>
+
+#define ORTE_IOF_BASE_MSG_MAX   2048
+
+int main(int argc, char *argv[])
+{
+    int i, rank, size, next, prev, tag = 201;
+    int pos, msgsize, nbytes;
+    bool done;
+    char *msg;
+
+    MPI_Init(&argc, &argv);
+    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+    MPI_Comm_size(MPI_COMM_WORLD, &size);
+
+    fprintf(stderr, "Rank %d has cleared MPI_Init\n", rank);
+
+    next = (rank + 1) % size;
+    prev = (rank + size - 1) % size;
+    msg = malloc(ORTE_IOF_BASE_MSG_MAX);
+    pos = 0;
+    nbytes = 0;
+
+    if (0 == rank) {
+        while (0 != (msgsize = read(0, msg, ORTE_IOF_BASE_MSG_MAX))) {
+            fprintf(stderr, "Rank %d: sending blob %d\n", rank, pos);
+            if (msgsize > 0) {
+                MPI_Bcast(msg, ORTE_IOF_BASE_MSG_MAX, MPI_BYTE, 0, MPI_COMM_WORLD);
+            }
+            ++pos;
+            nbytes += msgsize;
+        }
+        fprintf(stderr, "Rank %d: sending termination blob %d\n", rank, pos);
+        memset(msg, 0, ORTE_IOF_BASE_MSG_MAX);
+        MPI_Bcast(msg, ORTE_IOF_BASE_MSG_MAX, MPI_BYTE, 0, MPI_COMM_WORLD);
+        MPI_Barrier(MPI_COMM_WORLD);
+    } else {
+        while (1) {
+            MPI_Bcast(msg, ORTE_IOF_BASE_MSG_MAX, MPI_BYTE, 0, MPI_COMM_WORLD);
+            fprintf(stderr, "Rank %d: recvd blob %d\n", rank, pos);
+            ++pos;
+            done = true;
+            for (i=0; i < ORTE_IOF_BASE_MSG_MAX; i++) {
+                if (0 != msg[i]) {
+                    done = false;
+                    break;
+                }
+            }
+            if (done) {
+                break;
+            }
+        }
+        fprintf(stderr, "Rank %d: recv done\n", rank);
+        MPI_Barrier(MPI_COMM_WORLD);
+    }
+
+    fprintf(stderr, "Rank %d has completed bcast\n", rank);
+    MPI_Finalize();
+    return 0;
+}