Use OPENSSL_SYS_TANDEM instead of OPENSSL_SYSNAME_TANDEM

This streamlines with all other config targets, and draws from the
'sys_id' config attribute.

Fixes #12858
Reviewed-by: NTim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/12933)

apps/ca.c

@@ -26,7 +26,7 @@
 #ifndef W_OK
 # ifdef OPENSSL_SYS_VMS
 #  include <unistd.h>
-# elif !defined(OPENSSL_SYS_VXWORKS) && !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYSNAME_TANDEM)
+# elif !defined(OPENSSL_SYS_VXWORKS) && !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_TANDEM)
 #  include <sys/file.h>
 # endif
 #endif

apps/lib/apps.c

@@ -2410,7 +2410,7 @@ int raw_write_stdout(const void *buf, int siz)
     else
         return -1;
 }
-#elif defined(OPENSSL_SYSNAME_TANDEM) && defined(OPENSSL_THREADS) && defined(_SPT_MODEL_)
+#elif defined(OPENSSL_SYS_TANDEM) && defined(OPENSSL_THREADS) && defined(_SPT_MODEL_)
 # if defined(__TANDEM)
 #  if defined(OPENSSL_TANDEM_FLOSS)
 #   include <floss.h(floss_write)>

crypto/rand/rand_egd.c

@@ -54,7 +54,7 @@ struct sockaddr_un {
 # include <string.h>
 # include <errno.h>
 
-# if defined(OPENSSL_SYSNAME_TANDEM)
+# if defined(OPENSSL_SYS_TANDEM)
 /*
  * HPNS:
  *
@@ -125,7 +125,7 @@ int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
         return -1;
     strcpy(addr.sun_path, path);
     i = offsetof(struct sockaddr_un, sun_path) + strlen(path);
-#if defined(OPENSSL_SYSNAME_TANDEM)
+#if defined(OPENSSL_SYS_TANDEM)
     fd = hpns_socket(AF_UNIX, SOCK_STREAM, 0, AF_UNIX_COMPATIBILITY);
 #else
     fd = socket(AF_UNIX, SOCK_STREAM, 0);
@@ -158,7 +158,7 @@ int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
             /* No error, try again */
             break;
         default:
-# if defined(OPENSSL_SYSNAME_TANDEM)
+# if defined(OPENSSL_SYS_TANDEM)
             if (hpns_connect_attempt == 0) {
                 /* try the other kind of AF_UNIX socket */
                 close(fd);

include/internal/sockets.h

@@ -145,7 +145,7 @@ struct servent *PASCAL getservbyname(const char *, const char *);
 #  define closesocket(s)              close(s)
 #  define readsocket(s,b,n)           read((s),(b),(n))
 #  define writesocket(s,b,n)          write((s),(char *)(b),(n))
-# elif defined(OPENSSL_SYSNAME_TANDEM)
+# elif defined(OPENSSL_SYS_TANDEM)
 #  if defined(OPENSSL_TANDEM_FLOSS)
 #   include <floss.h(floss_read, floss_write)>
 #   define readsocket(s,b,n)       floss_read((s),(b),(n))