vi: saving unnamed file in readonly mode

Suppose vi is started with the command 'vi -R', that is, in readonly
mode with no filename.  Attempting to save the file with 'ZZ' or ':w'
results in the message:

   '(null)' is read only

Skip the code which prints this if no filename was provided, thus
falling through to file_write() which gives the more helpful message
'No current filename'.

function                                             old     new   delta
colon                                               3867    3874      +7
do_cmd                                              4668    4673      +5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 12/0)               Total: 12 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/editors/vi.c b/editors/vi.c
index d818127e2..a38f2189d 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -3054,7 +3054,7 @@ static void colon(char *buf)
                         fn = args;
                 }
 # if ENABLE_FEATURE_VI_READONLY
-                else if (readonly_mode && !useforce) {
+                else if (readonly_mode && !useforce && fn) {
                         status_line_bold("'%s' is read only", fn);
                         goto ret;
                 }
@@ -3996,7 +3996,7 @@ static void do_cmd(int c)
                         break;
                 }
                 if (modified_count) {
-                        if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
+                        if (ENABLE_FEATURE_VI_READONLY && readonly_mode && current_filename) {
                                 status_line_bold("'%s' is read only", current_filename);
                                 break;
                         }