* dir.cc (mkdir): Check for case clash.

        * environ.cc: Add extern declaration for `pcheck_case'.
        (check_case_init): New function.
        (struct parse_thing): Add "check_case" option.
        * errno.cc (_sys_nerrlist): Add text for ECASECLASH.
        (strerror): Add case branch for ECASECLASH.
        * fhandler.cc (fhandler_disk_file::open): Check for case clash.
        * path.cc: Add global variable `pcheck_case'.
        (struct symlink_info): Add member `case_clash' and method `case_check'.
        (path_prefix_p_): Call `pathnmatch' instead of `strncasematch'.
        (pathnmatch): New funtion.
        (pathmatch): Ditto.
        (path_conv::check): Add handling for case checking.
        (symlink): Check for case clash.
        (symlink_info::check): Add parameter for case checking.
        Handle case checking.
        (symlink_info::case_check): New method.
        (chdir): Don't use unconverted path if pcheck_case==PCHECK_STRICT.
        * path.h: Add extern declarations for `pathmatch' and
        `pathnmatch'.
        (enum case_checking): New enumeration type describing
        the case checking behaviour of path conversion routines.
        (class path_conv): Add member `case_clash'.
        * syscalls.cc (_link): Check for case clash.

1 files changed, 4 insertions, 2 deletions

diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc
index 73fe3f554..ff9a9dfb4 100644
--- a/winsup/cygwin/fhandler.cc
+++ b/winsup/cygwin/fhandler.cc
@@ -1208,9 +1208,11 @@ fhandler_disk_file::open (const char *path, int flags, mode_t mode)
 			     PC_SYM_NOFOLLOW : PC_SYM_FOLLOW);
 
   if (real_path.error &&
-      (flags & O_NOSYMLINK || real_path.error != ENOENT || !(flags & O_CREAT)))
+      (flags & O_NOSYMLINK || real_path.error != ENOENT
+       || !(flags & O_CREAT) || real_path.case_clash))
     {
-      set_errno (real_path.error);
+      set_errno (flags & O_CREAT && real_path.case_clash ? ECASECLASH
+      							 : real_path.error);
       syscall_printf ("0 = fhandler_disk_file::open (%s, %p)", path, flags);
       return 0;
     }