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Cygwin: symlink_info::check: avoid assertion failure 

On certain error conditions there is a code snippet that checks
whether the last component of the path has a trailing dot or space or
a leading space.  Skip this check if the last component is empty,
i.e., if the path ends with a backslash.  This avoids an assertion
failure if the trailing backslash is the only backslash in the path,
as is the case for a DOS drive 'X:\'.

Addresses: https://cygwin.com/ml/cygwin/2019-12/msg00016.html
This commit is contained in:
Ken Brown 2019-12-09 07:27:18 -05:00
parent 7a526cdc28
commit 48fbe173f4
1 changed files with 2 additions and 1 deletions
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3
winsup/cygwin/path.cc
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@ -2895,7 +2895,8 @@ restart:
slow down normal operation. This extra check only kicks in if slow down normal operation. This extra check only kicks in if
we encountered a STATUS_OBJECT_NAME_NOT_FOUND *and* we didn't we encountered a STATUS_OBJECT_NAME_NOT_FOUND *and* we didn't
already attach a suffix. */ already attach a suffix. */
if (!restarted && !*ext_here && !(mount_flags & MOUNT_DOS)) if (!restarted && !*ext_here && ext_here[-1] != '\\'
&& !(mount_flags & MOUNT_DOS))
{ {
/* Check for trailing dot or space or leading space in /* Check for trailing dot or space or leading space in
last component. */ last component. */