Add case-sensitivity.

	Unconditionally handle mount points case-sensitive.
	Unconditionally handle virtual paths case-sensitive.
	Unconditionally handle registry paths case-insensitive.
	Otherwise, accommodate case-sensitivity of given path throughout.
	* cygheap.cc (cygheap_root::set): Get additional caseinsensitive
	parameter and store it.
	* cygheap.h (struct cygheap_root_mount_info): Add member
	caseinsensitive.
	* dlfcn.cc (get_full_path_of_dll): Drop PC_NOFULL parameter from call
	to path_conv::check.
	* environ.cc (pcheck_case): Remove.
	(check_case_init): Remove.
	(known): Drop "check_case" option.
	* exceptions.cc (open_stackdumpfile): Add comment.
	* fhandler.cc (fhandler_base::get_default_fmode): Call pathmatch
	instead of strcasematch.
	* fhandler_disk_file.cc: Accommodate case-sensitivity of given path
	throughout.
	(__DIR_mounts::check_mount): Unconditionally check virtual paths
	case-sensitive.
	(fhandler_disk_file::link): Drop case clash handling.
	(fhandler_disk_file::open): Ditto.
	(fhandler_disk_file::readdir_helper): Drop managed mount code.
	* mount.cc: Remove managed mount code and datastructures.
	(struct opt): Remove "managed" option.  Add "posix=0" and "posix=1"
	options.
	(fillout_mntent): Remove "managed" output.  Add "posix" output.
	* path.cc (struct symlink_info): Remove case_clash member and
	case_check method.
	(pcheck_case): Remove.
	(path_prefix_p): Take additional bool parameter "caseinsensitive".
	(pathnmatch): Ditto.
	(pathmatch): Ditto.
	(mkrelpath): Ditto.
	(fs_info::update): Set caseinsensitive flag according to file system
	name and FILE_CASE_SENSITIVE_SEARCH flag.  Add comment.
	(tfx_chars_managed): Remove.
	(transform_chars): Drop "managed" parameter.  Always use tfx_chars.
	(get_nt_native_path): Drop "managed" parameter.  Make sure drive letters
	are always upper case.
	(getfileattr): Change second parameter to denote caseinsensitivity.
	(path_conv::check): Initialize caseinsensitive to OBJ_CASE_INSENSITIVE.
	Set caseinsensitive according to global obcaseinsensitive flag, file
	system case sensitivity and MOUNT_NOPOSIX mount flag.
	Drop case_clash and all the related code.
	(symlink_worker): Drop case clash handling.
	(symlink_info::set): Drop setting case_clash.
	(symlink_info::case_check): Remove.
	(cwdstuff::set): Add comment.
	(etc::init): Take path_conv instead of PUNICODE_STRING as parameter to
	allow case sensitivity.
	* path.h (enum pathconv_arg): Drop PC_SYM_IGNORE.
	(enum case_checking): Remove.
	(enum path_types): Drop PATH_ENC, add PATH_NOPOSIX flag.
	(struct fs_info): Add caseinsensitive flag and accessor methods.
	(class path_conv): Add caseinsensitive member and define
	objcaseinsensitive method.  Drop case_clash member and isencoded method.
	(pathmatch): Change prototype according to above change.
	(pathnmatch): Ditto.
	(path_prefix_p): Ditto.
	(get_nt_native_path): Ditto.
	(class etc): Ditto.
	(fnunmunge): Remove prototype.
	* shared.cc (shared_info::init_obcaseinsensitive): Initialize
	obcaseinsensitive flag from obcaseinsensitive registry value.
	(shared_info::initialize): Call init_obcaseinsensitive here by the
	first process creating the shared memory.
	* shared_info.h (mount_item::fnmunge): Remove.
	(shared_info::obcaseinsensitive): Rename from obcaseinsensitivity.
	(shared_info::init_obcaseinsensitive): Declare.
	* syscalls.cc (try_to_bin): Add comment.
	* include/sys/mount.h (MOUNT_ENC): Remove flag.
	(MOUNT_NOPOSIX): Add flag.

1 files changed, 13 insertions, 29 deletions

diff --git a/winsup/cygwin/fhandler_disk_file.cc b/winsup/cygwin/fhandler_disk_file.cc
index d0e86e481..be098ead9 100644
--- a/winsup/cygwin/fhandler_disk_file.cc
+++ b/winsup/cygwin/fhandler_disk_file.cc
@@ -81,20 +81,20 @@ public:
 	  UNICODE_STRING proc;
 
 	  RtlInitUnicodeString (&proc, L"proc");
-	  if (RtlEqualUnicodeString (fname, &proc, TRUE))
+	  if (RtlEqualUnicodeString (fname, &proc, FALSE))
 	    {
 	      found[__DIR_PROC] = true;
 	      return 2;
 	    }
 	  if (fname->Length / sizeof (WCHAR) == mount_table->cygdrive_len - 2
-	      && RtlEqualUnicodeString (fname, &cygdrive, TRUE))
+	      && RtlEqualUnicodeString (fname, &cygdrive, FALSE))
 	    {
 	      found[__DIR_CYGDRIVE] = true;
 	      return 2;
 	    }
 	}
       for (int i = 0; i < count; ++i)
-	if (RtlEqualUnicodeString (fname, &mounts[i], TRUE))
+	if (RtlEqualUnicodeString (fname, &mounts[i], FALSE))
 	  {
 	    found[i] = true;
 	    return eval ? eval_ino (i) : 1;
@@ -233,7 +233,7 @@ path_conv::ndisk_links (DWORD nNumberOfLinks)
 		RtlInitCountedUnicodeString (&fname, pfdi->FileName,
 					     pfdi->FileNameLength);
 		InitializeObjectAttributes (&attr, &fname,
-					    OBJ_CASE_INSENSITIVE, fh, NULL);
+					    objcaseinsensitive (), fh, NULL);
 		if (is_volume_mountpoint (&attr))
 		  ++count;
 	      }
@@ -379,7 +379,7 @@ fhandler_base::fstat_by_name (struct __stat64 *buf)
   LARGE_INTEGER FileId;
 
   RtlSplitUnicodePath (pc.get_nt_native_path (), &dirname, &basename);
-  InitializeObjectAttributes (&attr, &dirname, OBJ_CASE_INSENSITIVE,
+  InitializeObjectAttributes (&attr, &dirname, pc.objcaseinsensitive (),
 			      NULL, NULL);
   if (!NT_SUCCESS (status = NtOpenFile (&dir, SYNCHRONIZE | FILE_LIST_DIRECTORY,
 				       &attr, &io, FILE_SHARE_VALID_FLAGS,
@@ -1123,7 +1123,7 @@ fhandler_disk_file::link (const char *newpath)
   path_conv newpc (newpath, PC_SYM_NOFOLLOW | PC_POSIX, stat_suffixes);
   if (newpc.error)
     {
-      set_errno (newpc.case_clash ? ECASECLASH : newpc.error);
+      set_errno (newpc.error);
       return -1;
     }
 
@@ -1135,7 +1135,7 @@ fhandler_disk_file::link (const char *newpath)
     }
 
   char new_buf[strlen (newpath) + 5];
-  if (!newpc.error && !newpc.case_clash)
+  if (!newpc.error)
     {
       if (allow_winsymlinks && pc.is_lnk_special ())
 	{
@@ -1298,13 +1298,6 @@ fhandler_disk_file::open (int flags, mode_t mode)
 int
 fhandler_base::open_fs (int flags, mode_t mode)
 {
-  if (pc.case_clash && flags & O_CREAT)
-    {
-      debug_printf ("case clash detected");
-      set_errno (ECASECLASH);
-      return 0;
-    }
-
   /* Unfortunately NT allows to open directories for writing, but that's
      disallowed according to SUSv3. */
   if (pc.isdir () && (flags & O_ACCMODE) != O_RDONLY)
@@ -1683,7 +1676,7 @@ fhandler_disk_file::readdir_helper (DIR *dir, dirent *de, DWORD w32_err,
       OBJECT_ATTRIBUTES attr;
       IO_STATUS_BLOCK io;
 
-      InitializeObjectAttributes (&attr, fname, OBJ_CASE_INSENSITIVE,
+      InitializeObjectAttributes (&attr, fname, pc.objcaseinsensitive (),
 				  get_handle (), NULL);
       if (is_volume_mountpoint (&attr)
 	  && (NT_SUCCESS (NtOpenFile (&reph, READ_CONTROL, &attr, &io,
@@ -1729,18 +1722,8 @@ fhandler_disk_file::readdir_helper (DIR *dir, dirent *de, DWORD w32_err,
 	}
     }
 
-#if 0
-  if (pc.isencoded ())
-    {
-      char tmp[NAME_MAX + 1];
-      sys_wcstombs (tmp, NAME_MAX + 1, fname->Buffer,
-		    fname->Length / sizeof (WCHAR));
-      fnunmunge (de->d_name, tmp);
-    }
-  else
-#endif
-    sys_wcstombs (de->d_name, NAME_MAX + 1, fname->Buffer,
-		  fname->Length / sizeof (WCHAR));
+  sys_wcstombs (de->d_name, NAME_MAX + 1, fname->Buffer,
+		fname->Length / sizeof (WCHAR));
 
   if (dir->__d_position == 0 && !strcmp (de->d_name, "."))
     dir->__flags |= dirent_saw_dot;
@@ -1886,7 +1869,8 @@ go_ahead:
 	    {
 	      HANDLE hdl;
 
-	      InitializeObjectAttributes (&attr, &fname, OBJ_CASE_INSENSITIVE,
+	      InitializeObjectAttributes (&attr, &fname,
+					  pc.objcaseinsensitive (),
 					  get_handle (), NULL);
 	      if (NT_SUCCESS (NtOpenFile (&hdl, READ_CONTROL, &attr, &io,
 					  FILE_SHARE_VALID_FLAGS,
@@ -1964,7 +1948,7 @@ fhandler_disk_file::rewinddir (DIR *dir)
       HANDLE new_dir;
 
       RtlInitUnicodeString (&fname, L"");
-      InitializeObjectAttributes (&attr, &fname, OBJ_CASE_INSENSITIVE,
+      InitializeObjectAttributes (&attr, &fname, pc.objcaseinsensitive (),
 				  get_handle (), NULL);
       status = NtOpenFile (&new_dir, SYNCHRONIZE | FILE_LIST_DIRECTORY,
 			   &attr, &io, FILE_SHARE_VALID_FLAGS,