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Fix for using ":wundo foo" when foo is an empty file.

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This commit is contained in:
Bram Moolenaar 2010-05-25 22:09:21 +02:00
parent 64354da438
commit 83ad0147c0
1 changed files with 4 additions and 3 deletions
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7
src/undo.c
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@ -1286,11 +1286,12 @@ u_write_undo(name, forceit, buf, hash)
} }
else else
{ {
char_u buf[2]; char_u buf[2];
int len;
vim_read(fd, buf, 2); len = vim_read(fd, buf, 2);
close(fd); close(fd);
if ((buf[0] << 8) + buf[1] != UF_START_MAGIC) if (len < 2 || (buf[0] << 8) + buf[1] != UF_START_MAGIC)
{ {
if (name != NULL || p_verbose > 0) if (name != NULL || p_verbose > 0)
smsg((char_u *)_("Will not overwrite, this is not an undo file: %s"), smsg((char_u *)_("Will not overwrite, this is not an undo file: %s"),