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+#serial 26
+# How to list mounted file systems.
+
+# Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006 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.
+
+dnl From Jim Meyering.
+dnl
+dnl This is not pretty.  I've just taken the autoconf code and wrapped
+dnl it in an AC_DEFUN and made some other fixes.
+dnl
+
+# Replace Autoconf's AC_FUNC_GETMNTENT to work around a bug in Autoconf
+# through Autoconf 2.59.  We can remove this once we assume Autoconf 2.60
+# or later.
+AC_DEFUN([AC_FUNC_GETMNTENT],
+[# getmntent is in the standard C library on UNICOS, in -lsun on Irix 4,
+# -lseq on Dynix/PTX, -lgen on Unixware.
+AC_SEARCH_LIBS(getmntent, [sun seq gen])
+AC_CHECK_FUNCS(getmntent)
+])
+
+# gl_LIST_MOUNTED_FILE_SYSTEMS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+AC_DEFUN([gl_LIST_MOUNTED_FILE_SYSTEMS],
+  [
+AC_CHECK_FUNCS(listmntent getmntinfo)
+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
+
+# This test must precede the ones for getmntent because Unicos-9 is
+# reported to have the getmntent function, but its support is incompatible
+# with other getmntent implementations.
+
+# NOTE: Normally, I wouldn't use a check for system type as I've done for
+# `CRAY' below since that goes against the whole autoconf philosophy.  But
+# I think there is too great a chance that some non-Cray system has a
+# function named listmntent to risk the false positive.
+
+if test -z "$ac_list_mounted_fs"; then
+  # Cray UNICOS 9
+  AC_MSG_CHECKING([for listmntent of Cray/Unicos-9])
+  AC_CACHE_VAL(fu_cv_sys_mounted_cray_listmntent,
+    [fu_cv_sys_mounted_cray_listmntent=no
+      AC_EGREP_CPP(yes,
+        [#ifdef _CRAY
+yes
+#endif
+        ], [test $ac_cv_func_listmntent = yes \
+            && fu_cv_sys_mounted_cray_listmntent=yes]
+      )
+    ]
+  )
+  AC_MSG_RESULT($fu_cv_sys_mounted_cray_listmntent)
+  if test $fu_cv_sys_mounted_cray_listmntent = yes; then
+    ac_list_mounted_fs=found
+    AC_DEFINE(MOUNTED_LISTMNTENT, 1,
+      [Define if there is a function named listmntent that can be used to
+       list all mounted file systems.  (UNICOS)])
+  fi
+fi
+
+if test -z "$ac_list_mounted_fs"; then
+  # AIX.
+  AC_MSG_CHECKING([for mntctl function and struct vmount])
+  AC_CACHE_VAL(fu_cv_sys_mounted_vmount,
+  [AC_TRY_CPP([#include <fshelp.h>],
+    fu_cv_sys_mounted_vmount=yes,
+    fu_cv_sys_mounted_vmount=no)])
+  AC_MSG_RESULT($fu_cv_sys_mounted_vmount)
+  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
+    # 4.3BSD, SunOS, HP-UX, Dynix, Irix
+    AC_MSG_CHECKING([for one-argument getmntent function])
+    AC_CACHE_VAL(fu_cv_sys_mounted_getmntent1,
+                 [AC_TRY_COMPILE([
+/* SunOS 4.1.x /usr/include/mntent.h needs this for FILE */
+#include <stdio.h>
+
+#include <mntent.h>
+#if !defined MOUNTED
+# if defined _PATH_MOUNTED      /* GNU libc  */
+#  define MOUNTED _PATH_MOUNTED
+# endif
+# if defined MNT_MNTTAB /* HP-UX.  */
+#  define MOUNTED MNT_MNTTAB
+# endif
+# if defined MNTTABNAME /* Dynix.  */
+#  define MOUNTED MNTTABNAME
+# 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)])
+    AC_MSG_RESULT($fu_cv_sys_mounted_getmntent1)
+    if test $fu_cv_sys_mounted_getmntent1 = yes; then
+      ac_list_mounted_fs=found
+      AC_DEFINE(MOUNTED_GETMNTENT1, 1,
+        [Define if there is a function named getmntent for reading the list
+         of mounted file systems, and that function takes a single argument.
+         (4.3BSD, SunOS, HP-UX, Dynix, Irix)])
+    fi
+  fi
+
+  if test -z "$ac_list_mounted_fs"; then
+    # SVR4
+    AC_MSG_CHECKING([for two-argument getmntent function])
+    AC_CACHE_VAL(fu_cv_sys_mounted_getmntent2,
+    [AC_EGREP_HEADER(getmntent, sys/mnttab.h,
+      fu_cv_sys_mounted_getmntent2=yes,
+      fu_cv_sys_mounted_getmntent2=no)])
+    AC_MSG_RESULT($fu_cv_sys_mounted_getmntent2)
+    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
+  # DEC Alpha running OSF/1, and Apple Darwin 1.3.
+  # powerpc-apple-darwin1.3.7 needs sys/param.h sys/ucred.h sys/fs_types.h
+
+  AC_MSG_CHECKING([for getfsstat function])
+  AC_CACHE_VAL(fu_cv_sys_mounted_getfsstat,
+  [AC_TRY_LINK([
+#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
+]$getfsstat_includes
+,
+  [struct statfs *stats;
+   int numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT);
+   char *t = FS_TYPE (*stats); ],
+    fu_cv_sys_mounted_getfsstat=yes,
+    fu_cv_sys_mounted_getfsstat=no)])
+  AC_MSG_RESULT($fu_cv_sys_mounted_getfsstat)
+  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
+  # SVR3
+  AC_MSG_CHECKING([for FIXME existence of three headers])
+  AC_CACHE_VAL(fu_cv_sys_mounted_fread_fstyp,
+    [AC_TRY_CPP([
+#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)])
+  AC_MSG_RESULT($fu_cv_sys_mounted_fread_fstyp)
+  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
+  # 4.4BSD and DEC OSF/1.
+  AC_MSG_CHECKING([for getmntinfo function])
+  AC_CACHE_VAL(fu_cv_sys_mounted_getmntinfo,
+    [
+      test "$ac_cv_func_getmntinfo" = yes \
+          && fu_cv_sys_mounted_getmntinfo=yes \
+          || fu_cv_sys_mounted_getmntinfo=no
+    ])
+  AC_MSG_RESULT($fu_cv_sys_mounted_getmntinfo)
+  if test $fu_cv_sys_mounted_getmntinfo = yes; then
+    AC_MSG_CHECKING([whether getmntinfo returns statvfs structures])
+    AC_CACHE_VAL(fu_cv_sys_mounted_getmntinfo2,
+      [
+        AC_TRY_COMPILE([
+#if HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+#include <sys/types.h>
+#if HAVE_SYS_MOUNT_H
+# include <sys/mount.h>
+#endif
+#if HAVE_SYS_STATVFS_H
+# include <sys/statvfs.h>
+#endif
+extern int getmntinfo (struct statfs **, int);
+          ], [],
+          [fu_cv_sys_mounted_getmntinfo2=no],
+          [fu_cv_sys_mounted_getmntinfo2=yes])
+      ])
+    AC_MSG_RESULT([$fu_cv_sys_mounted_getmntinfo2])
+    if test $fu_cv_sys_mounted_getmntinfo2 = no; then
+      ac_list_mounted_fs=found
+      AC_DEFINE(MOUNTED_GETMNTINFO, 1,
+                [Define if there is a function named getmntinfo for reading the
+                 list of mounted file systems and it returns an array of
+                 'struct statfs'.  (4.4BSD, Darwin)])
+    else
+      ac_list_mounted_fs=found
+      AC_DEFINE(MOUNTED_GETMNTINFO2, 1,
+                [Define if there is a function named getmntinfo for reading the
+                 list of mounted file systems and it returns an array of
+                 'struct statvfs'.  (NetBSD 3.0)])
+    fi
+  fi
+fi
+
+if test -z "$ac_list_mounted_fs"; then
+  # Ultrix
+  AC_MSG_CHECKING([for getmnt function])
+  AC_CACHE_VAL(fu_cv_sys_mounted_getmnt,
+    [AC_TRY_CPP([
+#include <sys/fs_types.h>
+#include <sys/mount.h>],
+                fu_cv_sys_mounted_getmnt=yes,
+                fu_cv_sys_mounted_getmnt=no)])
+  AC_MSG_RESULT($fu_cv_sys_mounted_getmnt)
+  if test $fu_cv_sys_mounted_getmnt = yes; then
+    ac_list_mounted_fs=found
+    AC_DEFINE(MOUNTED_GETMNT, 1,
+      [Define if there is a function named getmnt for reading the list of
+       mounted file systems.  (Ultrix)])
+  fi
+fi
+
+if test -z "$ac_list_mounted_fs"; then
+  # BeOS
+  AC_CHECK_FUNCS(next_dev fs_stat_dev)
+  AC_CHECK_HEADERS(fs_info.h)
+  AC_MSG_CHECKING([for BEOS mounted file system support functions])
+  if test $ac_cv_header_fs_info_h = yes \
+      && test $ac_cv_func_next_dev = yes \
+        && test $ac_cv_func_fs_stat_dev = yes; then
+    fu_result=yes
+  else
+    fu_result=no
+  fi
+  AC_MSG_RESULT($fu_result)
+  if test $fu_result = yes; then
+    ac_list_mounted_fs=found
+    AC_DEFINE(MOUNTED_FS_STAT_DEV, 1,
+      [Define if there are functions named next_dev and fs_stat_dev for
+       reading the list of mounted file systems.  (BeOS)])
+  fi
+fi
+
+if test -z "$ac_list_mounted_fs"; then
+  # SVR2
+  AC_MSG_CHECKING([whether it is possible to resort to fread on /etc/mnttab])
+  AC_CACHE_VAL(fu_cv_sys_mounted_fread,
+    [AC_TRY_CPP([#include <mnttab.h>],
+                fu_cv_sys_mounted_fread=yes,
+                fu_cv_sys_mounted_fread=no)])
+  AC_MSG_RESULT($fu_cv_sys_mounted_fread)
+  if test $fu_cv_sys_mounted_fread = yes; then
+    ac_list_mounted_fs=found
+    AC_DEFINE(MOUNTED_FREAD, 1,
+              [Define if there is no specific function for reading the list of
+               mounted file systems.  fread will be used to read /etc/mnttab.
+               (SVR2) ])
+  fi
+fi
+
+if test -z "$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
+
+AS_IF([test $ac_list_mounted_fs = found], [$1], [$2])
+
+  ])