mountlist: don't consider "devtmpfs" as dummy

[gnulib.git] / lib / mountlist.c

diff --git a/lib/mountlist.c b/lib/mountlist.c
index 0a884dc..8fb7e9a 100644 (file)
--- a/lib/mountlist.c
+++ b/lib/mountlist.c
@@ -1,6 +1,6 @@
 /* mountlist.c -- return a list of mounted file systems
 
-   Copyright (C) 1991-1992, 1997-2012 Free Software Foundation, Inc.
+   Copyright (C) 1991-1992, 1997-2013 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -149,22 +149,42 @@
 #undef opendir
 #undef closedir
 
-#ifndef ME_DUMMY
-# define ME_DUMMY(Fs_name, Fs_type)             \
-    (strcmp (Fs_type, "autofs") == 0            \
-     || strcmp (Fs_type, "none") == 0           \
-     || strcmp (Fs_type, "proc") == 0           \
-     || strcmp (Fs_type, "subfs") == 0          \
-     /* for NetBSD 3.0 */                       \
-     || strcmp (Fs_type, "kernfs") == 0         \
-     /* for Irix 6.5 */                         \
-     || strcmp (Fs_type, "ignore") == 0)
+#define ME_DUMMY_0(Fs_name, Fs_type)            \
+  (strcmp (Fs_type, "autofs") == 0              \
+   || strcmp (Fs_type, "proc") == 0             \
+   || strcmp (Fs_type, "subfs") == 0            \
+   /* for Linux 2.6/3.x */                      \
+   || strcmp (Fs_type, "debugfs") == 0          \
+   || strcmp (Fs_type, "devpts") == 0           \
+   || strcmp (Fs_type, "fusectl") == 0          \
+   || strcmp (Fs_type, "mqueue") == 0           \
+   || strcmp (Fs_type, "rpc_pipefs") == 0       \
+   || strcmp (Fs_type, "sysfs") == 0            \
+   /* FreeBSD, Linux 2.4 */                     \
+   || strcmp (Fs_type, "devfs") == 0            \
+   /* for NetBSD 3.0 */                         \
+   || strcmp (Fs_type, "kernfs") == 0           \
+   /* for Irix 6.5 */                           \
+   || strcmp (Fs_type, "ignore") == 0)
+
+/* Historically, we have marked as "dummy" any file system of type "none",
+   but now that programs like du need to know about bind-mounted directories,
+   we grant an exception to any with "bind" in its list of mount options.
+   I.e., those are *not* dummy entries.  */
+#ifdef MOUNTED_GETMNTENT1
+# define ME_DUMMY(Fs_name, Fs_type, Fs_ent)    \
+  (ME_DUMMY_0 (Fs_name, Fs_type)               \
+   || (strcmp (Fs_type, "none") == 0           \
+       && !hasmntopt (Fs_ent, "bind")))
+#else
+# define ME_DUMMY(Fs_name, Fs_type)            \
+  (ME_DUMMY_0 (Fs_name, Fs_type) || strcmp (Fs_type, "none") == 0)
 #endif
 
 #ifdef __CYGWIN__
 # include <windows.h>
 # define ME_REMOTE me_remote
-/* All cygwin mount points include `:' or start with `//'; so it
+/* All cygwin mount points include ':' or start with '//'; so it
    requires a native Windows call to determine remote disks.  */
 static bool
 me_remote (char const *fs_name, char const *fs_type _GL_UNUSED)
@@ -187,8 +207,8 @@ me_remote (char const *fs_name, char const *fs_type _GL_UNUSED)
 #endif
 
 #ifndef ME_REMOTE
-/* A file system is `remote' if its Fs_name contains a `:'
-   or if (it is of type (smbfs or cifs) and its Fs_name starts with `//').  */
+/* A file system is "remote" if its Fs_name contains a ':'
+   or if (it is of type (smbfs or cifs) and its Fs_name starts with '//').  */
 # define ME_REMOTE(Fs_name, Fs_type)            \
     (strchr (Fs_name, ':') != NULL              \
      || ((Fs_name)[0] == '/'                    \
@@ -419,7 +439,7 @@ read_file_system_list (bool need_fs_type)
         me->me_mountdir = xstrdup (mnt->mnt_dir);
         me->me_type = xstrdup (mnt->mnt_type);
         me->me_type_malloced = 1;
-        me->me_dummy = ME_DUMMY (me->me_devname, me->me_type);
+        me->me_dummy = ME_DUMMY (me->me_devname, me->me_type, mnt);
         me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
         me->me_dev = dev_from_mount_options (mnt->mnt_opts);