stat-util: rename files_same() → inode_same()

Let's be more accurate about what this function does: it checks whether
the underlying reported inode is the same. Internally, this already uses
a better named stat_inode_same() call, hence let's similarly name the
wrapping function following the same logic.

Similar for files_same_at() and path_equal_or_same_files().

No code changes, just some renaming.

src/shared/install.c

@@ -493,7 +493,7 @@ static int chroot_unit_symlinks_equivalent(
         if (!a || !b)
                 return log_oom();
 
-        r = path_equal_or_files_same(a, b, 0);
+        r = path_equal_or_inode_same(a, b, 0);
         if (r != 0)
                 return r;
 

src/shared/rm-rf.c

@@ -438,7 +438,7 @@ int rm_rf(const char *path, RemoveFlags flags) {
 
         /* We refuse to clean the root file system with this call. This is extra paranoia to never cause a
          * really seriously broken system. */
-        if (path_equal_or_files_same(path, "/", AT_SYMLINK_NOFOLLOW))
+        if (path_equal_or_inode_same(path, "/", AT_SYMLINK_NOFOLLOW))
                 return log_error_errno(SYNTHETIC_ERRNO(EPERM),
                                        "Attempted to remove entire root file system (\"%s\"), and we can't allow that.",
                                        path);

src/shared/switch-root.c

@@ -45,7 +45,7 @@ int switch_root(const char *new_root,
         if (new_root_fd < 0)
                 return log_error_errno(errno, "Failed to open target directory '%s': %m", new_root);
 
-        r = files_same_at(old_root_fd, "", new_root_fd, "", AT_EMPTY_PATH);
+        r = inode_same_at(old_root_fd, "", new_root_fd, "", AT_EMPTY_PATH);
         if (r < 0)
                 return log_error_errno(r, "Failed to determine if old and new root directory are the same: %m");
         if (r > 0) {