From a3cf7959e5bb4e6a64179629359765ba9dcc44d8 Mon Sep 17 00:00:00 2001
From: Phil Carns <carns@mcs.anl.gov>
Date: Fri, 14 Dec 2018 13:28:51 -0500
Subject: [PATCH] bug fix: posix_fallocate() returns error directly

---
 perf-regression/margo-p2p-bw.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/perf-regression/margo-p2p-bw.c b/perf-regression/margo-p2p-bw.c
index 85fd2de..9528db7 100644
--- a/perf-regression/margo-p2p-bw.c
+++ b/perf-regression/margo-p2p-bw.c
@@ -20,6 +20,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <assert.h>
+#include <errno.h>
 
 #include <mpi.h>
 
@@ -611,6 +612,7 @@ static void* custom_mmap_alloc(const char* filename, size_t size, int rank)
     ret = posix_fallocate(fd, 0, size);
     if(ret != 0)
     {
+        errno = ret;
         perror("posix_fallocate");
         return(NULL);
     }
-- 
2.26.2