7 files changed, 793 insertions, 0 deletions
diff --git a/m4.include/gnulib/fstypename.m4 b/m4.include/gnulib/fstypename.m4
new file mode 100644
index 0000000..20d2f05
--- /dev/null
+++ b/m4.include/gnulib/fstypename.m4
@@ -0,0 +1,23 @@
+#serial 6
+
+dnl From Jim Meyering.
+dnl
+dnl See if struct statfs has the f_fstypename member.
+dnl If so, define HAVE_STRUCT_STATFS_F_FSTYPENAME.
+dnl
+
+# Copyright (C) 1998-1999, 2001, 2004, 2006, 2009-2011 Free Software
+# Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FSTYPENAME],
+[
+  AC_CHECK_MEMBERS([struct statfs.f_fstypename],,,
+    [
+      #include <sys/types.h>
+      #include <sys/param.h>
+      #include <sys/mount.h>
+    ])
+])
diff --git a/m4.include/gnulib/fsusage.m4 b/m4.include/gnulib/fsusage.m4
new file mode 100644
index 0000000..c15cfca
--- /dev/null
+++ b/m4.include/gnulib/fsusage.m4
@@ -0,0 +1,306 @@
+# serial 35
+# Obtaining file system usage information.
+
+# Copyright (C) 1997-1998, 2000-2001, 2003-2020 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Jim Meyering.
+
+AC_DEFUN([gl_FSUSAGE],
+[
+  AC_CHECK_HEADERS_ONCE([sys/param.h])
+  AC_CHECK_HEADERS_ONCE([sys/vfs.h sys/fs_types.h])
+  AC_CHECK_HEADERS([sys/mount.h], [], [],
+    [AC_INCLUDES_DEFAULT
+     [#if HAVE_SYS_PARAM_H
+       #include <sys/param.h>
+      #endif]])
+  gl_FILE_SYSTEM_USAGE([gl_cv_fs_space=yes], [gl_cv_fs_space=no])
+])
+
+# Try to determine how a program can obtain file system usage information.
+# If successful, define the appropriate symbol (see fsusage.c) and
+# execute ACTION-IF-FOUND.  Otherwise, execute ACTION-IF-NOT-FOUND.
+#
+# gl_FILE_SYSTEM_USAGE([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+
+AC_DEFUN([gl_FILE_SYSTEM_USAGE],
+[
+  dnl Enable large-file support. This has the effect of changing the size
+  dnl of field f_blocks in 'struct statvfs' from 32 bit to 64 bit on
+  dnl glibc/Hurd, HP-UX 11, Solaris (32-bit mode). It also changes the size
+  dnl of field f_blocks in 'struct statfs' from 32 bit to 64 bit on
+  dnl Mac OS X >= 10.5 (32-bit mode).
+  AC_REQUIRE([AC_SYS_LARGEFILE])
+
+  ac_fsusage_space=no
+
+  # Perform only the link test since it seems there are no variants of the
+  # statvfs function.  This check is more than just AC_CHECK_FUNCS([statvfs])
+  # because that got a false positive on SCO OSR5.  Adding the declaration
+  # of a 'struct statvfs' causes this test to fail (as it should) on such
+  # systems.  That system is reported to work fine with STAT_STATFS4 which
+  # is what it gets when this test fails.
+  if test $ac_fsusage_space = no; then
+    # glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
+    # OpenBSD >= 4.4, AIX, HP-UX, IRIX, Solaris, Cygwin, Interix, BeOS.
+    AC_CACHE_CHECK([for statvfs function (SVR4)],
+      [fu_cv_sys_stat_statvfs],
+      [AC_LINK_IFELSE(
+         [AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#ifdef __osf__
+"Do not use Tru64's statvfs implementation"
+#endif
+
+#include <sys/statvfs.h>
+
+struct statvfs fsd;
+
+#if defined __APPLE__ && defined __MACH__
+#include <limits.h>
+/* On Mac OS X >= 10.5, f_blocks in 'struct statvfs' is a 32-bit quantity;
+   that commonly limits file systems to 4 TiB.  Whereas f_blocks in
+   'struct statfs' is a 64-bit type, thanks to the large-file support
+   that was enabled above.  In this case, don't use statvfs(); use statfs()
+   instead.  */
+int check_f_blocks_size[sizeof fsd.f_blocks * CHAR_BIT <= 32 ? -1 : 1];
+#endif
+]],
+            [[statvfs (0, &fsd);]])],
+         [fu_cv_sys_stat_statvfs=yes],
+         [fu_cv_sys_stat_statvfs=no])
+      ])
+    if test $fu_cv_sys_stat_statvfs = yes; then
+      ac_fsusage_space=yes
+      # AIX >= 5.2 has statvfs64 that has a wider f_blocks field than statvfs.
+      # glibc, HP-UX, IRIX, Solaris have statvfs64 as well, but on these systems
+      # statvfs with large-file support is already equivalent to statvfs64.
+      AC_CACHE_CHECK([whether to use statvfs64],
+        [fu_cv_sys_stat_statvfs64],
+        [AC_LINK_IFELSE(
+           [AC_LANG_PROGRAM(
+              [[#include <sys/types.h>
+                #include <sys/statvfs.h>
+                struct statvfs64 fsd;
+                int check_f_blocks_larger_in_statvfs64
+                  [sizeof (((struct statvfs64 *) 0)->f_blocks)
+                   > sizeof (((struct statvfs *) 0)->f_blocks)
+                   ? 1 : -1];
+              ]],
+              [[statvfs64 (0, &fsd);]])],
+           [fu_cv_sys_stat_statvfs64=yes],
+           [fu_cv_sys_stat_statvfs64=no])
+        ])
+      if test $fu_cv_sys_stat_statvfs64 = yes; then
+        AC_DEFINE([STAT_STATVFS64], [1],
+          [Define if statvfs64 should be preferred over statvfs.])
+      else
+        AC_DEFINE([STAT_STATVFS], [1],
+          [Define if there is a function named statvfs.  (SVR4)])
+      fi
+    fi
+  fi
+
+  # Check for this unconditionally so we have a
+  # good fallback on glibc/Linux > 2.6 < 2.6.36
+  AC_CACHE_CHECK([for two-argument statfs with statfs.f_frsize member],
+    [fu_cv_sys_stat_statfs2_frsize],
+    [AC_RUN_IFELSE(
+       [AC_LANG_SOURCE([[
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#ifdef HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+#ifdef HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+  int
+  main ()
+  {
+    struct statfs fsd;
+    fsd.f_frsize = 0;
+    return statfs (".", &fsd) != 0;
+  }]])],
+       [fu_cv_sys_stat_statfs2_frsize=yes],
+       [fu_cv_sys_stat_statfs2_frsize=no],
+       [fu_cv_sys_stat_statfs2_frsize=no])
+    ])
+  if test $fu_cv_sys_stat_statfs2_frsize = yes; then
+    ac_fsusage_space=yes
+    AC_DEFINE([STAT_STATFS2_FRSIZE], [1],
+      [Define if statfs takes 2 args and struct statfs has a field named f_frsize.
+       (glibc/Linux > 2.6)])
+  fi
+
+  if test $ac_fsusage_space = no; then
+    # DEC Alpha running OSF/1
+    AC_CACHE_CHECK([for 3-argument statfs function (DEC OSF/1)],
+      [fu_cv_sys_stat_statfs3_osf1],
+      [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/mount.h>
+  int
+  main ()
+  {
+    struct statfs fsd;
+    fsd.f_fsize = 0;
+    return statfs (".", &fsd, sizeof (struct statfs)) != 0;
+  }]])],
+         [fu_cv_sys_stat_statfs3_osf1=yes],
+         [fu_cv_sys_stat_statfs3_osf1=no],
+         [fu_cv_sys_stat_statfs3_osf1=no])
+      ])
+    if test $fu_cv_sys_stat_statfs3_osf1 = yes; then
+      ac_fsusage_space=yes
+      AC_DEFINE([STAT_STATFS3_OSF1], [1],
+        [Define if statfs takes 3 args.  (DEC Alpha running OSF/1)])
+    fi
+  fi
+
+  if test $ac_fsusage_space = no; then
+    # glibc/Linux, Mac OS X, FreeBSD < 5.0, NetBSD < 3.0, OpenBSD < 4.4.
+    # (glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
+    # OpenBSD >= 4.4, AIX, HP-UX, OSF/1, Cygwin already handled above.)
+    # (On IRIX you need to include <sys/statfs.h>, not only <sys/mount.h> and
+    # <sys/vfs.h>.)
+    # (On Solaris, statfs has 4 arguments.)
+    AC_CACHE_CHECK([for two-argument statfs with statfs.f_bsize member (AIX, 4.3BSD)],
+      [fu_cv_sys_stat_statfs2_bsize],
+      [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#ifdef HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+#ifdef HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+  int
+  main ()
+  {
+    struct statfs fsd;
+    fsd.f_bsize = 0;
+    return statfs (".", &fsd) != 0;
+  }]])],
+         [fu_cv_sys_stat_statfs2_bsize=yes],
+         [fu_cv_sys_stat_statfs2_bsize=no],
+         [fu_cv_sys_stat_statfs2_bsize=no])
+      ])
+    if test $fu_cv_sys_stat_statfs2_bsize = yes; then
+      ac_fsusage_space=yes
+      AC_DEFINE([STAT_STATFS2_BSIZE], [1],
+        [Define if statfs takes 2 args and struct statfs has a field named f_bsize.
+         (4.3BSD, SunOS 4, HP-UX)])
+    fi
+  fi
+
+  if test $ac_fsusage_space = no; then
+    # SVR3
+    # (Solaris already handled above.)
+    AC_CACHE_CHECK([for four-argument statfs (SVR3)],
+      [fu_cv_sys_stat_statfs4],
+      [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <sys/types.h>
+#include <sys/statfs.h>
+  int
+  main ()
+  {
+    struct statfs fsd;
+    return statfs (".", &fsd, sizeof fsd, 0) != 0;
+  }]])],
+         [fu_cv_sys_stat_statfs4=yes],
+         [fu_cv_sys_stat_statfs4=no],
+         [fu_cv_sys_stat_statfs4=no])
+      ])
+    if test $fu_cv_sys_stat_statfs4 = yes; then
+      ac_fsusage_space=yes
+      AC_DEFINE([STAT_STATFS4], [1],
+        [Define if statfs takes 4 args.  (SVR3, old Irix)])
+    fi
+  fi
+
+  if test $ac_fsusage_space = no; then
+    # 4.4BSD and older NetBSD
+    # (OSF/1 already handled above.)
+    # (On AIX, you need to include <sys/statfs.h>, not only <sys/mount.h>.)
+    # (On Solaris, statfs has 4 arguments and 'struct statfs' is not declared in
+    # <sys/mount.h>.)
+    AC_CACHE_CHECK([for two-argument statfs with statfs.f_fsize member (4.4BSD and NetBSD)],
+      [fu_cv_sys_stat_statfs2_fsize],
+      [AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <sys/types.h>
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#ifdef HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+  int
+  main ()
+  {
+    struct statfs fsd;
+    fsd.f_fsize = 0;
+    return statfs (".", &fsd) != 0;
+  }]])],
+         [fu_cv_sys_stat_statfs2_fsize=yes],
+         [fu_cv_sys_stat_statfs2_fsize=no],
+         [fu_cv_sys_stat_statfs2_fsize=no])
+      ])
+    if test $fu_cv_sys_stat_statfs2_fsize = yes; then
+      ac_fsusage_space=yes
+      AC_DEFINE([STAT_STATFS2_FSIZE], [1],
+        [Define if statfs takes 2 args and struct statfs has a field named f_fsize.
+         (4.4BSD, NetBSD)])
+    fi
+  fi
+
+  AS_IF([test $ac_fsusage_space = yes], [$1], [$2])
+
+])
+
+
+# Check for SunOS statfs brokenness wrt partitions 2GB and larger.
+# If <sys/vfs.h> exists and struct statfs has a member named f_spare,
+# enable the work-around code in fsusage.c.
+AC_DEFUN([gl_STATFS_TRUNCATES],
+[
+  AC_CACHE_CHECK([for statfs that truncates block counts],
+    [fu_cv_sys_truncating_statfs],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM([[
+#if !defined(sun) && !defined(__sun)
+choke -- this is a workaround for a Sun-specific problem
+#endif
+#include <sys/types.h>
+#include <sys/vfs.h>
+         ]],
+         [[struct statfs t; long c = *(t.f_spare);
+           if (c) return 0;
+         ]])],
+       [fu_cv_sys_truncating_statfs=yes],
+       [fu_cv_sys_truncating_statfs=no])
+    ])
+  if test $fu_cv_sys_truncating_statfs = yes; then
+    AC_DEFINE([STATFS_TRUNCATES_BLOCK_COUNTS], [1],
+      [Define if the block counts reported by statfs may be truncated to 2GB
+       and the correct values may be stored in the f_spare array.
+       (SunOS 4.1.2, 4.1.3, and 4.1.3_U1 are reported to have this problem.
+       SunOS 4.1.1 seems not to be affected.)])
+  fi
+])
+
+
+# Prerequisites of lib/fsusage.c not done by gl_FILE_SYSTEM_USAGE.
+AC_DEFUN([gl_PREREQ_FSUSAGE_EXTRA],
+[
+  AC_CHECK_HEADERS([sys/fs/s5param.h sys/statfs.h])
+  gl_STATFS_TRUNCATES
+])
diff --git a/m4.include/gnulib/mode_t.m4 b/m4.include/gnulib/mode_t.m4
new file mode 100644
index 0000000..0cd40db
--- /dev/null
+++ b/m4.include/gnulib/mode_t.m4
@@ -0,0 +1,26 @@
+# mode_t.m4 serial 2
+dnl Copyright (C) 2009-2016 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# For using mode_t, it's sufficient to use AC_TYPE_MODE_T and
+# include <sys/types.h>.
+
+# Define PROMOTED_MODE_T to the type that is the result of "default argument
+# promotion" (ISO C 6.5.2.2.(6)) of the type mode_t.
+AC_DEFUN([gl_PROMOTED_TYPE_MODE_T],
+[
+  AC_REQUIRE([AC_TYPE_MODE_T])
+  AC_CACHE_CHECK([for promoted mode_t type], [gl_cv_promoted_mode_t], [
+    dnl Assume mode_t promotes to 'int' if and only if it is smaller than 'int',
+    dnl and to itself otherwise. This assumption is not guaranteed by the ISO C
+    dnl standard, but we don't know of any real-world counterexamples.
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>]],
+      [[typedef int array[2 * (sizeof (mode_t) < sizeof (int)) - 1];]])],
+      [gl_cv_promoted_mode_t='int'],
+      [gl_cv_promoted_mode_t='mode_t'])
+  ])
+  AC_DEFINE_UNQUOTED([PROMOTED_MODE_T], [$gl_cv_promoted_mode_t],
+    [Define to the type that is the result of default argument promotions of type mode_t.])
+])
diff --git a/m4.include/gnulib/mountlist.m4 b/m4.include/gnulib/mountlist.m4
new file mode 100644
index 0000000..49029ed
--- /dev/null
+++ b/m4.include/gnulib/mountlist.m4
@@ -0,0 +1,338 @@
+# serial 15
+dnl Copyright (C) 2002-2006, 2009-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Jim Meyering.
+
+AC_PREREQ([2.60])
+
+AC_DEFUN([gl_MOUNTLIST],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS([listmntent])
+  AC_CHECK_HEADERS_ONCE([sys/param.h sys/statvfs.h])
+
+  # We must include grp.h before ucred.h on OSF V4.0, since ucred.h uses
+  # NGROUPS (as the array dimension for a struct member) without a definition.
+  AC_CHECK_HEADERS([sys/ucred.h], [], [], [#include <grp.h>])
+
+  AC_CHECK_HEADERS([sys/mount.h], [], [],
+    [AC_INCLUDES_DEFAULT
+     [#if HAVE_SYS_PARAM_H
+       #include <sys/param.h>
+      #endif
+    ]])
+
+  AC_CHECK_HEADERS([mntent.h sys/fs_types.h])
+  getfsstat_includes="\
+$ac_includes_default
+#if HAVE_SYS_PARAM_H
+# include <sys/param.h> /* needed by powerpc-apple-darwin1.3.7 */
+#endif
+#if HAVE_SYS_UCRED_H
+# include <grp.h> /* needed for definition of NGROUPS */
+# include <sys/ucred.h> /* needed by powerpc-apple-darwin1.3.7 */
+#endif
+#if HAVE_SYS_MOUNT_H
+# include <sys/mount.h>
+#endif
+#if HAVE_SYS_FS_TYPES_H
+# include <sys/fs_types.h> /* needed by powerpc-apple-darwin1.3.7 */
+#endif
+"
+  AC_CHECK_MEMBERS([struct fsstat.f_fstypename],,,[$getfsstat_includes])
+
+  # Determine how to get the list of mounted file systems.
+  ac_list_mounted_fs=
+
+  # If the getmntent function is available but not in the standard library,
+  # make sure LIBS contains the appropriate -l option.
+  AC_FUNC_GETMNTENT
+
+  if test -z "$ac_list_mounted_fs"; then
+    # AIX.
+    AC_CACHE_CHECK([for mntctl function and struct vmount],
+      [fu_cv_sys_mounted_vmount],
+      [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <fshelp.h>]])],
+         [fu_cv_sys_mounted_vmount=yes],
+         [fu_cv_sys_mounted_vmount=no])])
+    if test $fu_cv_sys_mounted_vmount = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_VMOUNT], [1],
+        [Define if there is a function named mntctl that can be used to read
+         the list of mounted file systems, and there is a system header file
+         that declares 'struct vmount'.  (AIX)])
+    fi
+  fi
+
+  if test $ac_cv_func_getmntent = yes; then
+
+    # This system has the getmntent function.
+    # Determine whether it's the one-argument variant or the two-argument one.
+
+    if test -z "$ac_list_mounted_fs"; then
+      # glibc, HP-UX, IRIX, Cygwin, Android, also (obsolete) 4.3BSD, SunOS.
+      AC_CACHE_CHECK([for one-argument getmntent function],
+        [fu_cv_sys_mounted_getmntent1],
+        [AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM([[
+/* SunOS 4.1.x /usr/include/mntent.h needs this for FILE */
+#include <stdio.h>
+
+#include <mntent.h>
+#if defined __ANDROID__        /* Android */
+# undef MOUNTED
+# define MOUNTED "/proc/mounts"
+#elif !defined MOUNTED
+# if defined _PATH_MOUNTED     /* GNU libc  */
+#  define MOUNTED _PATH_MOUNTED
+# endif
+# if defined MNT_MNTTAB        /* HP-UX.  */
+#  define MOUNTED MNT_MNTTAB
+# endif
+#endif
+]],
+              [[struct mntent *mnt = 0; char *table = MOUNTED;
+                if (sizeof mnt && sizeof table) return 0;
+              ]])],
+           [fu_cv_sys_mounted_getmntent1=yes],
+           [fu_cv_sys_mounted_getmntent1=no])
+        ])
+      if test $fu_cv_sys_mounted_getmntent1 = yes; then
+        ac_list_mounted_fs=found
+        AC_DEFINE([MOUNTED_GETMNTENT1], [1],
+          [Define if there is a function named getmntent for reading the list
+           of mounted file systems, and that function takes a single argument.
+           (4.3BSD, SunOS, HP-UX, Irix)])
+        AC_CHECK_FUNCS([setmntent endmntent hasmntopt])
+      fi
+    fi
+
+    if test -z "$ac_list_mounted_fs"; then
+      # Solaris >= 8.
+      AC_CACHE_CHECK([for getextmntent function],
+        [fu_cv_sys_mounted_getextmntent],
+        [AC_EGREP_HEADER([getextmntent], [sys/mnttab.h],
+           [fu_cv_sys_mounted_getextmntent=yes],
+           [fu_cv_sys_mounted_getextmntent=no])])
+      if test $fu_cv_sys_mounted_getextmntent = yes; then
+        ac_list_mounted_fs=found
+        AC_DEFINE([MOUNTED_GETEXTMNTENT], [1],
+          [Define if there is a function named getextmntent for reading the list
+           of mounted file systems.  (Solaris)])
+      fi
+    fi
+
+    if test -z "$ac_list_mounted_fs"; then
+      # Solaris < 8, also (obsolete) SVR4.
+      # Solaris >= 8 has the two-argument getmntent but is already handled above.
+      AC_CACHE_CHECK([for two-argument getmntent function],
+        [fu_cv_sys_mounted_getmntent2],
+        [AC_EGREP_HEADER([getmntent], [sys/mnttab.h],
+           [fu_cv_sys_mounted_getmntent2=yes],
+           [fu_cv_sys_mounted_getmntent2=no])
+        ])
+      if test $fu_cv_sys_mounted_getmntent2 = yes; then
+        ac_list_mounted_fs=found
+        AC_DEFINE([MOUNTED_GETMNTENT2], [1],
+          [Define if there is a function named getmntent for reading the list of
+           mounted file systems, and that function takes two arguments.  (SVR4)])
+        AC_CHECK_FUNCS([hasmntopt])
+      fi
+    fi
+
+  fi
+
+  if test -z "$ac_list_mounted_fs"; then
+    # OSF/1, also (obsolete) Apple Darwin 1.3.
+    # powerpc-apple-darwin1.3.7 needs sys/param.h sys/ucred.h sys/fs_types.h
+
+    AC_CACHE_CHECK([for getfsstat function],
+      [fu_cv_sys_mounted_getfsstat],
+      [AC_LINK_IFELSE(
+         [AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#if HAVE_STRUCT_FSSTAT_F_FSTYPENAME
+# define FS_TYPE(Ent) ((Ent).f_fstypename)
+#else
+# define FS_TYPE(Ent) mnt_names[(Ent).f_type]
+#endif
+$getfsstat_includes
+            ]],
+            [[struct statfs *stats;
+              int numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT);
+              char *t = FS_TYPE (*stats);
+            ]])],
+         [fu_cv_sys_mounted_getfsstat=yes],
+         [fu_cv_sys_mounted_getfsstat=no])
+      ])
+    if test $fu_cv_sys_mounted_getfsstat = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_GETFSSTAT], [1],
+        [Define if there is a function named getfsstat for reading the
+         list of mounted file systems.  (DEC Alpha running OSF/1)])
+    fi
+  fi
+
+  if test -z "$ac_list_mounted_fs"; then
+    # (obsolete) SVR3
+    AC_CACHE_CHECK([for FIXME existence of three headers],
+      [fu_cv_sys_mounted_fread_fstyp],
+      [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
+#include <sys/statfs.h>
+#include <sys/fstyp.h>
+#include <mnttab.h>
+]])],
+         [fu_cv_sys_mounted_fread_fstyp=yes],
+         [fu_cv_sys_mounted_fread_fstyp=no])
+      ])
+    if test $fu_cv_sys_mounted_fread_fstyp = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_FREAD_FSTYP], [1],
+        [Define if (like SVR2) there is no specific function for reading the
+         list of mounted file systems, and your system has these header files:
+         <sys/fstyp.h> and <sys/statfs.h>.  (SVR3)])
+    fi
+  fi
+
+  if test -z "$ac_list_mounted_fs"; then
+    # Mac OS X, FreeBSD, NetBSD, OpenBSD, Minix, also (obsolete) 4.4BSD.
+    # OSF/1 also has getmntinfo but is already handled above.
+    # We cannot use AC_CHECK_FUNCS([getmntinfo]) here, because at the linker
+    # level the function is sometimes called getmntinfo64 or getmntinfo$INODE64
+    # on Mac OS X, __getmntinfo13 on NetBSD and Minix, _F64_getmntinfo on OSF/1.
+    AC_CACHE_CHECK([for getmntinfo function],
+      [fu_cv_sys_mounted_getmntinfo],
+      [AC_LINK_IFELSE(
+         [AC_LANG_PROGRAM([[
+#if HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+#include <sys/types.h>
+#if HAVE_SYS_MOUNT_H
+# include <sys/mount.h>
+#endif
+#if HAVE_SYS_STATVFS_H
+# include <sys/statvfs.h>
+#endif
+#include <stdlib.h>
+            ]],
+            [[int count = getmntinfo (NULL, MNT_WAIT);
+            ]])],
+         [fu_cv_sys_mounted_getmntinfo=yes],
+         [fu_cv_sys_mounted_getmntinfo=no])
+      ])
+    if test $fu_cv_sys_mounted_getmntinfo = yes; then
+      AC_CACHE_CHECK([whether getmntinfo returns statvfs structures],
+        [fu_cv_sys_mounted_getmntinfo2],
+        [AC_COMPILE_IFELSE(
+           [AC_LANG_PROGRAM([[
+#if HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+#include <sys/types.h>
+#if HAVE_SYS_MOUNT_H
+# include <sys/mount.h>
+#endif
+#if HAVE_SYS_STATVFS_H
+# include <sys/statvfs.h>
+#endif
+extern
+#ifdef __cplusplus
+"C"
+#endif
+int getmntinfo (struct statfs **, int);
+              ]], [[]])],
+           [fu_cv_sys_mounted_getmntinfo2=no],
+           [fu_cv_sys_mounted_getmntinfo2=yes])
+        ])
+      if test $fu_cv_sys_mounted_getmntinfo2 = no; then
+        # Mac OS X, FreeBSD, OpenBSD, also (obsolete) 4.4BSD.
+        ac_list_mounted_fs=found
+        AC_DEFINE([MOUNTED_GETMNTINFO], [1],
+          [Define if there is a function named getmntinfo for reading the
+           list of mounted file systems and it returns an array of
+           'struct statfs'.  (4.4BSD, Darwin)])
+      else
+        # NetBSD, Minix.
+        ac_list_mounted_fs=found
+        AC_DEFINE([MOUNTED_GETMNTINFO2], [1],
+          [Define if there is a function named getmntinfo for reading the
+           list of mounted file systems and it returns an array of
+           'struct statvfs'.  (NetBSD 3.0)])
+      fi
+    fi
+  fi
+
+  if test -z "$ac_list_mounted_fs"; then
+    # Haiku, also (obsolete) BeOS.
+    AC_CHECK_FUNCS([next_dev fs_stat_dev])
+    AC_CHECK_HEADERS([fs_info.h])
+    AC_CACHE_CHECK([for BEOS mounted file system support functions],
+      [fu_cv_sys_mounted_fs_stat_dev],
+      [if test $ac_cv_header_fs_info_h = yes \
+          && test $ac_cv_func_next_dev = yes \
+          && test $ac_cv_func_fs_stat_dev = yes; then
+         fu_cv_sys_mounted_fs_stat_dev=yes
+       else
+         fu_cv_sys_mounted_fs_stat_dev=no
+       fi
+      ])
+    if test $fu_cv_sys_mounted_fs_stat_dev = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE([MOUNTED_FS_STAT_DEV], [1],
+        [Define if there are functions named next_dev and fs_stat_dev for
+         reading the list of mounted file systems.  (BeOS)])
+    fi
+  fi
+
+  if test -z "$ac_list_mounted_fs"; then
+    # Interix / BSD alike statvfs
+    # the code is really interix specific, so make sure, we're on it.
+    case "$host" in
+      *-interix*)
+        AC_CHECK_FUNCS([statvfs])
+        if test $ac_cv_func_statvfs = yes; then
+          ac_list_mounted_fs=found
+          AC_DEFINE([MOUNTED_INTERIX_STATVFS], [1],
+            [Define if we are on interix, and ought to use statvfs plus
+             some special knowledge on where mounted file systems can be
+             found. (Interix)])
+        fi
+        ;;
+    esac
+  fi
+
+  if test -z "$ac_list_mounted_fs"; then
+    AC_MSG_ERROR([could not determine how to read list of mounted file systems])
+    # FIXME -- no need to abort building the whole package
+    # Can't build mountlist.c or anything that needs its functions
+  fi
+
+  if test $ac_list_mounted_fs = found; then
+    gl_cv_list_mounted_fs=yes
+  else
+    gl_cv_list_mounted_fs=no
+  fi
+])
+
+# Prerequisites of lib/mountlist.c not done by gl_MOUNTLIST.
+AC_DEFUN([gl_PREREQ_MOUNTLIST_EXTRA],
+[
+  dnl Note gl_MOUNTLIST checks for mntent.h, not sys/mntent.h.
+  AC_CHECK_HEADERS([sys/mntent.h])
+  AC_HEADER_MAJOR()dnl for use of makedev ()
+  gl_FSTYPENAME
+])
+
+# Replace Autoconf's AC_FUNC_GETMNTENT to omit checks that are unnecessary
+# nowadays.
+AC_DEFUN([AC_FUNC_GETMNTENT],
+[
+  # getmntent is in the standard C library on most systems, but in -lgen on
+  # Unixware.
+  AC_SEARCH_LIBS([getmntent], [gen])
+  AC_CHECK_FUNCS([getmntent])
+])
diff --git a/m4.include/gnulib/stat-size.m4 b/m4.include/gnulib/stat-size.m4
new file mode 100644
index 0000000..95f4828
--- /dev/null
+++ b/m4.include/gnulib/stat-size.m4
@@ -0,0 +1,14 @@
+#serial 1
+
+# Copyright (C) 2011-2020 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_STAT_SIZE],
+[
+  # Don't call AC_STRUCT_ST_BLOCKS because it causes bugs.  Details at
+  # https://lists.gnu.org/r/bug-gnulib/2011-06/msg00051.html
+  AC_CHECK_HEADERS_ONCE([sys/param.h])
+])
diff --git a/m4.include/gnulib/sys_types_h.m4 b/m4.include/gnulib/sys_types_h.m4
new file mode 100644
index 0000000..53f2c09
--- /dev/null
+++ b/m4.include/gnulib/sys_types_h.m4
@@ -0,0 +1,67 @@
+# sys_types_h.m4 serial 12
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_SYS_TYPES_H],
+[
+  AC_REQUIRE([gl_SYS_TYPES_H_DEFAULTS])
+
+  dnl Use sane struct stat types in OpenVMS 8.2 and later.
+  AC_DEFINE([_USE_STD_STAT], 1, [For standard stat data types on VMS.])
+
+  gl_NEXT_HEADERS([sys/types.h])
+
+  dnl Ensure the type pid_t gets defined.
+  AC_REQUIRE([AC_TYPE_PID_T])
+
+  dnl Ensure the type mode_t gets defined.
+  AC_REQUIRE([AC_TYPE_MODE_T])
+
+  dnl Whether to override the 'off_t' type.
+  AC_REQUIRE([gl_TYPE_OFF_T])
+
+  dnl Whether to override the 'dev_t' and 'ino_t' types.
+  m4_ifdef([gl_WINDOWS_STAT_INODES], [
+    AC_REQUIRE([gl_WINDOWS_STAT_INODES])
+  ], [
+    WINDOWS_STAT_INODES=0
+  ])
+  AC_SUBST([WINDOWS_STAT_INODES])
+])
+
+AC_DEFUN([gl_SYS_TYPES_H_REQUIRE_DEFAULTS],
+[
+  m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_TYPE_H_MODULE_INDICATOR_DEFAULTS], [
+  ])
+  m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_TYPE_H_MODULE_INDICATOR_DEFAULTS])
+  AC_REQUIRE([gl_SYS_TYPES_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_SYS_TYPES_H_DEFAULTS],
+[
+])
+
+# This works around a buggy version in autoconf <= 2.69.
+# See <https://lists.gnu.org/r/autoconf/2016-08/msg00014.html>
+# The 2.70 version isn't quoted properly, so override it too.
+
+m4_version_prereq([2.70.1], [], [
+
+m4_undefine([AC_HEADER_MAJOR])
+AC_DEFUN([AC_HEADER_MAJOR],
+[AC_CHECK_HEADERS_ONCE([sys/types.h])
+AC_CHECK_HEADER([sys/mkdev.h],
+                [AC_DEFINE([MAJOR_IN_MKDEV], [1],
+                           [Define to 1 if `major', `minor', and `makedev' are
+                            declared in <mkdev.h>.])])
+if test $ac_cv_header_sys_mkdev_h = no; then
+  AC_CHECK_HEADER([sys/sysmacros.h],
+                  [AC_DEFINE([MAJOR_IN_SYSMACROS], [1],
+                             [Define to 1 if `major', `minor', and `makedev'
+                              are declared in <sysmacros.h>.])])
+fi
+])# AC_HEADER_MAJOR
+
+])
diff --git a/m4.include/gnulib/windows-stat-inodes.m4 b/m4.include/gnulib/windows-stat-inodes.m4
new file mode 100644
index 0000000..936900a
--- /dev/null
+++ b/m4.include/gnulib/windows-stat-inodes.m4
@@ -0,0 +1,19 @@
+# windows-stat-inodes.m4 serial 1
+dnl Copyright (C) 2017-2018 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Enable inode identification in 'struct stat' on native Windows platforms.
+dnl Set WINDOWS_STAT_INODES to
+dnl - 0 -> keep the default (dev_t = 32-bit, ino_t = 16-bit),
+dnl - 1 -> override types normally (dev_t = 32-bit, ino_t = 64-bit),
+dnl - 2 -> override types in an extended way (dev_t = 64-bit, ino_t = 128-bit).
+AC_DEFUN([gl_WINDOWS_STAT_INODES],
+[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  case "$host_os" in
+    mingw*) WINDOWS_STAT_INODES=1 ;;
+    *)      WINDOWS_STAT_INODES=0 ;;
+  esac
+])