From eb75c894db2e35087a864db7773428b442e3d911 Mon Sep 17 00:00:00 2001
From: Steffen Jaeckel <s@jaeckel.eu>
Date: Thu, 21 Sep 2017 16:13:22 +0200
Subject: [PATCH] hashsum: cleanup at exit

---
 demos/hashsum.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/demos/hashsum.c b/demos/hashsum.c
index 83ab8c6..69dd2f2 100644
--- a/demos/hashsum.c
+++ b/demos/hashsum.c
@@ -38,6 +38,11 @@
 
 static char* hashsum;
 
+static void cleanup(void)
+{
+   free(hashsum);
+}
+
 static void die(int status)
 {
    unsigned long w, x;
@@ -53,7 +58,6 @@ static void die(int status)
       }
    }
    if (w != 0) fprintf(o, "\n");
-   free(hashsum);
    exit(status);
 }
 
@@ -173,6 +177,7 @@ int main(int argc, char **argv)
    unsigned char hash_buffer[MAXBLOCKSIZE];
 
    hashsum = strdup(basename(argv[0]));
+   atexit(cleanup);
 
    /* You need to register algorithms before using them */
    register_all_ciphers();