tex: fail when overwriting files unless with a bang - neatvi - [fork] simple vi-type editor with UTF-8 support

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commit 2e55bac697aba82a162cd461a6112c82c7eaf871

parent d2e6b8054daf567c687f0cb4b526b4a6f439d7d5

Author: Ali Gholami Rudi 

Date:   Mon,  6 Jun 2016 23:43:47 +0430

ex: fail when overwriting files unless with a bang

Diffstat:
  M ex.c                                |       8 ++++++--

1 file changed, 6 insertions(+), 2 deletions(-)
---

diff --git a/ex.c b/ex.c

t@@ -472,12 +472,16 @@ static int ec_write(char *ec)
                 if (!strchr(cmd, '!') && bufs[0].path &&
                                 !strcmp(bufs[0].path, path) &&
                                 mtime(bufs[0].path) > bufs[0].mtime) {
-                        ex_show("write failed\n");
+                        ex_show("write failed: file changed\n");
+                        return 1;
+                }
+                if (!strchr(cmd, '!') && arg[0] && mtime(arg) >= 0) {
+                        ex_show("write failed: file exists\n");
                         return 1;
                 }
                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0600);
                 if (fd < 0) {
-                        ex_show("write failed\n");
+                        ex_show("write failed: cannot create file\n");
                         return 1;
                 }
                 if (lbuf_wr(xb, fd, beg, end)) {