.

src/chgrp.c

@@ -53,6 +53,7 @@ struct group *getgrnam ();
 
 int lstat ();
 
+char *group_member ();
 char *savedir ();
 char *xmalloc ();
 char *xrealloc ();
@@ -208,9 +209,22 @@ change_file_group (file, group)
 	describe_change (file, 1);
       if (chown (file, file_stats.st_uid, group))
 	{
-	  if (force_silent == 0)
-	    error (0, errno, "%s", file);
 	  errors = 1;
+	  if (force_silent == 0)
+	    {
+	      /* Give a more specific message.  Some systems set errno
+		 to EPERM for both `inaccessible file' and `user not a member
+		 of the specified group' errors.  */
+	      if (errno == EPERM && !group_member (group))
+		{
+		  error (0, errno, "you are not a member of group `%s'",
+			 groupname);
+		}
+	      else
+		{
+		  error (0, errno, "%s", file);
+		}
+	    }
 	}
     }
   else if (verbose && changes_only == 0)

src/cp.c

@@ -78,8 +78,8 @@ char *program_name;
    whether dereferencing of symlinks is done.  */
 static int (*xstat) ();
 
-/* If nonzero, copy all files except directories and, if not dereferencing
-   them, symbolic links, as if they were regular files. */
+/* If nonzero, copy all files except (directories and, if not dereferencing
+   them, symbolic links,) as if they were regular files. */
 static int flag_copy_as_regular = 1;
 
 /* If nonzero, dereference symbolic links (copy the files they point to). */
@@ -563,7 +563,7 @@ copy (src_path, dst_path, new_dst, device, ancestors)
 	    {
 	      if (flag_interactive)
 		{
-		  if (eaccess_stat (&dst_sb, W_OK) != 0)
+		  if (eaccess_stat (&dst_sb, W_OK, dst_path) != 0)
 		    fprintf (stderr,
 			     "%s: overwrite `%s', overriding mode %04o? ",
 			     program_name, dst_path,
@@ -808,7 +808,9 @@ copy (src_path, dst_path, new_dst, device, ancestors)
 
       /* If non-root uses -p, it's ok if we can't preserve ownership.
 	 But root probably wants to know, e.g. if NFS disallows it.  */
-      if (chown (dst_path, src_sb.st_uid, src_sb.st_gid)
+      if (chown (dst_path,
+		 (myeuid == 0 ? src_sb.st_uid : myeuid),
+		 src_sb.st_gid)
 	  && (errno != EPERM || myeuid == 0))
 	{
 	  error (0, errno, "%s", dst_path);

src/mv.c

@@ -282,7 +282,7 @@ do_move (source, dest)
 	return 0;
 
       if (!override_mode && (interactive || stdin_tty)
-	  && eaccess_stat (&dest_stats, W_OK))
+	  && eaccess_stat (&dest_stats, W_OK, dest))
 	{
 	  fprintf (stderr, "%s: replace `%s', overriding mode %04o? ",
 		   program_name, dest,

src/rm.c

@@ -228,7 +228,7 @@ remove_file (statp)
      struct stat *statp;
 {
   if (!ignore_missing_files && (interactive || stdin_tty)
-      && eaccess_stat (statp, W_OK)
+      && eaccess_stat (statp, W_OK, pathname)
 #ifdef S_ISLNK
       && !S_ISLNK (statp->st_mode)
 #endif