From: Eli Zaretskii <eliz@gnu.org>
Date: Sat, 23 May 2020 05:50:22 +0000 (+0300)
Subject: Fix accessing files on networked drives on MS-Windows
X-Git-Tag: emacs-27.1-rc1~115
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=a10254dd46da920d14dd990714d0f21fd508d07d;p=emacs.git

Fix accessing files on networked drives on MS-Windows

* src/w32.c (acl_get_file): Set errno to ENOTSUP if
get_file_security returns ERROR_NOT_SUPPORTED.  (Bug#41463)
---

diff --git a/src/w32.c b/src/w32.c
index 62c53fd7711..78e75f0937e 100644
--- a/src/w32.c
+++ b/src/w32.c
@@ -6398,7 +6398,15 @@ acl_get_file (const char *fname, acl_type_t type)
 	      if (!get_file_security (fname, si, psd, sd_len, &sd_len))
 		{
 		  xfree (psd);
-		  errno = EIO;
+		  err = GetLastError ();
+		  if (err == ERROR_NOT_SUPPORTED)
+		    errno = ENOTSUP;
+		  else if (err == ERROR_FILE_NOT_FOUND
+			   || err == ERROR_PATH_NOT_FOUND
+			   || err == ERROR_INVALID_NAME)
+		    errno = ENOENT;
+		  else
+		    errno = EIO;
 		  psd = NULL;
 		}
 	    }
@@ -6409,6 +6417,8 @@ acl_get_file (const char *fname, acl_type_t type)
 		      be encoded in the current ANSI codepage. */
 		   || err == ERROR_INVALID_NAME)
 	    errno = ENOENT;
+	  else if (err == ERROR_NOT_SUPPORTED)
+	    errno = ENOTSUP;
 	  else
 	    errno = EIO;
 	}