1 files changed, 7 insertions, 3 deletions

diff --git a/src/lib/libcrypto/rand/rand_egd.c b/src/lib/libcrypto/rand/rand_egd.c
index 6f742900a0..cd666abfcb 100644
--- a/src/lib/libcrypto/rand/rand_egd.c
+++ b/src/lib/libcrypto/rand/rand_egd.c
@@ -95,7 +95,7 @@
  *   RAND_egd() is a wrapper for RAND_egd_bytes() with numbytes=255.
  */
 
-#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VXWORKS)
+#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_VOS)
 int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
         {
         return(-1);
@@ -216,7 +216,9 @@ int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
             while (numbytes != 1)
                 {
                 num = read(fd, egdbuf, 1);
-                if (num >= 0)
+                if (num == 0)
+                        goto err;       /* descriptor closed */
+                else if (num > 0)
                     numbytes += num;
                 else
                     {
@@ -246,7 +248,9 @@ int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
             while (numbytes != egdbuf[0])
                 {
                 num = read(fd, retrievebuf + numbytes, egdbuf[0] - numbytes);
-                if (num >= 0)
+                if (num == 0)
+                        goto err;       /* descriptor closed */
+                else if (num > 0)
                     numbytes += num;
                 else
                     {