VMS: fix collected error strings

It turns out that on VMS, strerror() returns messages with added
spaces at the end.

We wouldn't had noticed if it wasn't for perl trimming those spaces
off for its own sake and thereby having test/recipes/02-test_errstr.t
fail on VMS.

The safe fix is to do the same trimming ourselves.

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7701)

1 files changed, 13 insertions, 1 deletions

diff --git a/crypto/err/err.c b/crypto/err/err.c
index ffdc140da2..34061bc662 100644
--- a/crypto/err/err.c
+++ b/crypto/err/err.c
@@ -19,6 +19,7 @@
 #include <openssl/bio.h>
 #include <openssl/opensslconf.h>
 #include "internal/thread_once.h"
+#include "internal/ctype.h"
 
 static int err_load_strings(const ERR_STRING_DATA *str);
 
@@ -217,13 +218,24 @@ static void build_SYS_str_reasons(void)
         str->error = ERR_PACK(ERR_LIB_SYS, 0, i);
         if (str->string == NULL) {
             if (openssl_strerror_r(i, cur, sizeof(strerror_pool) - cnt)) {
-                size_t l = strlen(cur) + 1;
+                size_t l = strlen(cur);
 
                 str->string = cur;
                 cnt += l;
                 if (cnt > sizeof(strerror_pool))
                     cnt = sizeof(strerror_pool);
                 cur += l;
+
+                /*
+                 * VMS has an unusual quirk of adding spaces at the end of
+                 * some (most? all?) messages.  Lets trim them off.
+                 */
+                while (ossl_isspace(cur[-1])) {
+                    cur--;
+                    cnt--;
+                }
+                *cur++ = '\0';
+                cnt++;
             }
         }
         if (str->string == NULL)