Fix uses of deprecated SELinux security_context_t

SELinux has used 'char *' in place of its typedef
'security_context_t' since 2014 (v2.3) because the latter was
inconvenient to use when paired with the 'const' qualifier.  The
typedef has been kept around for compatibility with legacy callers,
but it is deprecated in SELinux v3.1.  See the following URL for the
relevant announcement:
https://lore.kernel.org/selinux/20200710162034.GC1768200@localhost.localdomain/

* src/fileio.c (Fcopy_file, Ffile_selinux_context)
(Fset_file_selinux_context) [HAVE_LIBSELINUX]: Replace deprecated
'security_context_t' typedef with the equivalent 'char *'.

diff --git a/src/fileio.c b/src/fileio.c
index 2f1d2f82433f57631f3b78fa4c158a3d489f0669..37072d9b6bd6ed2eb21848d1e648a6ba7d6fb2f0 100644 (file)
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -2031,7 +2031,7 @@ permissions.  */)
   ptrdiff_t count = SPECPDL_INDEX ();
   Lisp_Object encoded_file, encoded_newname;
 #if HAVE_LIBSELINUX
-  security_context_t con;
+  char *con;
   int conlength = 0;
 #endif
 #ifdef WINDOWSNT
@@ -3118,7 +3118,7 @@ or if SELinux is disabled, or if Emacs lacks SELinux support.  */)
 #if HAVE_LIBSELINUX
   if (is_selinux_enabled ())
     {
-      security_context_t con;
+      char *con;
       int conlength = lgetfilecon (SSDATA (ENCODE_FILE (absname)), &con);
       if (conlength > 0)
        {
@@ -3163,7 +3163,7 @@ or if Emacs was not compiled with SELinux support.  */)
   Lisp_Object role = CAR_SAFE (CDR_SAFE (context));
   Lisp_Object type = CAR_SAFE (CDR_SAFE (CDR_SAFE (context)));
   Lisp_Object range = CAR_SAFE (CDR_SAFE (CDR_SAFE (CDR_SAFE (context))));
-  security_context_t con;
+  char *con;
   bool fail;
   int conlength;
   context_t parsed_con;