[newlib-cygwin/cygwin-3_0-branch] Cygwin: remove path_conv::is_auto_device()

[Ken Brown]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=24b695a447e539f0ba4ed2d0ce594dfdc0186c1e

commit 24b695a447e539f0ba4ed2d0ce594dfdc0186c1e
Author: Ken Brown <kbrown@cornell.edu>
Date:   Sat Jul 20 16:21:43 2019 -0400

    Cygwin: remove path_conv::is_auto_device()
    
    It is used only once, and the name is supposed to suggest "device that
    is not based on the filesystem".  This intended meaning is clearer if
    we just replace is_auto_device() by its definition at the place where
    it's used.

Diff:
---
 winsup/cygwin/path.cc | 2 +-
 winsup/cygwin/path.h  | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
index 158f1e5..ed58e96 100644
--- a/winsup/cygwin/path.cc
+++ b/winsup/cygwin/path.cc
@@ -1921,7 +1921,7 @@ symlink_worker (const char *oldpath, const char *newpath, bool isdevice)
 		      win32_newpath.get_nt_native_path (), wsym_type);
 
       if ((!isdevice && win32_newpath.exists ())
-	  || win32_newpath.is_auto_device ())
+	  || (win32_newpath.isdevice () && !win32_newpath.is_fs_special ()))
 	{
 	  set_errno (EEXIST);
 	  __leave;
diff --git a/winsup/cygwin/path.h b/winsup/cygwin/path.h
index 0c94c61..d1be1db 100644
--- a/winsup/cygwin/path.h
+++ b/winsup/cygwin/path.h
@@ -183,7 +183,6 @@ class path_conv
   int isfifo () const {return dev.is_device (FH_FIFO);}
   int isspecial () const {return dev.not_device (FH_FS);}
   int iscygdrive () const {return dev.is_device (FH_CYGDRIVE);}
-  int is_auto_device () const {return isdevice () && !is_fs_special ();}
   int is_fs_device () const {return isdevice () && is_fs_special ();}
   int is_fs_special () const {return dev.is_fs_special ();}
   int is_lnk_special () const {return is_fs_device () || isfifo () || is_lnk_symlink ();}