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Ken Brown e0d56b3ec1 Cygwin: remove old cruft from path_conv::check 
Prior to commit b0717aae, path_conv::check had the following code:

      if (strncmp (path, "\\\\.\\", 4))
        {
          /* Windows ignores trailing dots and spaces in the last path
             component, and ignores exactly one trailing dot in inner
             path components. */
          char *tail = NULL;
          [...]
          if (!tail || tail == path)
            /* nothing */;
          else if (tail[-1] != '\\')
            {
              *tail = '\0';
          [...]
        }

Commit b0717aae0 intended to disable this code, but it inadvertently
disabled only part of it.  In particular, the declaration of the local
tail variable was in the disabled code, but the following remained:

          if (!tail || tail == path)
            /* nothing */;
          else if (tail[-1] != '\\')
            {
              *tail = '\0';
          [...]
        }

[A later commit removed the disabled code.]

The tail variable here points into a string different from path,
causing that string to be truncated under some circumstances.  See

  https://cygwin.com/ml/cygwin/2019-09/msg00001.html

for more details.

This commit fixes the problem by removing the leftover code
that was intended to be removed in b0717aae.
 		2020-10-14 10:54:01 -04:00
..
CVSChangeLogs.old
…
cygserver Cygwin: fix GCC 8.3 'local external declaration' errors 2020-10-14 10:53:56 -04:00
cygwin Cygwin: remove old cruft from path_conv::check 2020-10-14 10:54:01 -04:00
doc Cygwin: document last change 2020-10-14 10:54:01 -04:00
lsaauth Switching the Cygwin DLL to LGPLv3+, dropping commercial buyout option 2016-06-23 10:09:17 +02:00
testsuite Switching the Cygwin DLL to LGPLv3+, dropping commercial buyout option 2016-06-23 10:09:17 +02:00
utils Cygwin: pty: Prevent the helper process from exiting by Ctrl-C. 2020-10-14 10:54:00 -04:00
CONTRIBUTORS Cygwin: Add J.H. van de Water to CONTRIBUTORS 2018-08-15 18:02:22 +02:00
COPYING
…
COPYING.LIB Switching the Cygwin DLL to LGPLv3+, dropping commercial buyout option 2016-06-23 10:09:17 +02:00
CYGWIN_LICENSE Clarify source file license in CYGWIN_LICENSE 2016-06-23 21:52:12 +02:00
Makefile.common Switching the Cygwin DLL to LGPLv3+, dropping commercial buyout option 2016-06-23 10:09:17 +02:00
Makefile.in Switching the Cygwin DLL to LGPLv3+, dropping commercial buyout option 2016-06-23 10:09:17 +02:00
README
…
acinclude.m4
…
aclocal.m4
…
autogen.sh
…
c++wrap
…
ccwrap
…
config.guess
…
config.sub
…
configure Cygwin: seteuid: disable unused funcs and lsaauth subdir 2019-01-28 10:24:18 +01:00
configure.ac Cygwin: seteuid: disable unused funcs and lsaauth subdir 2019-01-28 10:24:18 +01:00
configure.cygwin
…
install-sh
…

README 

THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESSED OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Cygwin documentation is available on the net at https://cygwin.com
You might especially be interested in

https://cygwin.com/faq/faq.html#faq.programming.building-cygwin