#
#  Local hacks for ZMailer with  GNU autoconfig 2.12
#

AC_DEFUN(AC_FUNC_GETMNTENT_MORE,
[dnl
#
# Determine how to get the list of mounted filesystems.
#
# Defines one of:  MOUNTED_GETMNTENT1, MOUNTED_GETMNTENT2 MOUNTED_GETFSSTAT,
#		   MOUNTED_VMOUNT, MOUNTED_FREAD_FSTYP, MOUNTED_GETMNTINFO,
#		   MOUNTED_GETMNT, MOUNTED_FREAD
#

list_mounted_fs=

# If the getmntent function is available but not in the standard library,
# make sure LIBS contains -lsun (on Irix4) or -lseq (on PTX).
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 "$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,
		 [test $ac_cv_header_mntent_h = yes \
		   && fu_cv_sys_mounted_getmntent1=yes \
		   || fu_cv_sys_mounted_getmntent1=no])
    AC_MSG_RESULT($fu_cv_sys_mounted_getmntent1)
    if test $fu_cv_sys_mounted_getmntent1 = yes; then
      list_mounted_fs=found
      AC_DEFINE(MOUNTED_GETMNTENT1,1,[Define if there is a function named getmntent for reading the list
   of mounted filesystems, and that function takes a single argument.
   [4.3BSD, SunOS, HP-UX, Dynix, Irix]])
    fi
  fi

  if test -z "$list_mounted_fs"; then
    # SVR4
    AC_MSG_CHECKING([for two-argument getmntent function])
    AC_CACHE_VAL(fu_cv_sys_mounted_getmntent2,
    [AC_EGREP_HEADER(getmntent, sys/mnttab.h,
      fu_cv_sys_mounted_getmntent2=yes,
      fu_cv_sys_mounted_getmntent2=no)])
    AC_MSG_RESULT($fu_cv_sys_mounted_getmntent2)
    if test $fu_cv_sys_mounted_getmntent2 = yes; then
      list_mounted_fs=found
      AC_DEFINE(MOUNTED_GETMNTENT2,1,[Define if there is a function named getmntent for reading the list of
   mounted filesystems, and that function takes two arguments.  [SVR4]])
    fi
  fi

  if test -z "$list_mounted_fs"; then
    AC_MSG_ERROR([could not determine how to read list of mounted filesystems])
  fi

fi

if test -z "$list_mounted_fs"; then
  # DEC Alpha running OSF/1.
  AC_MSG_CHECKING([for getfsstat function])
  AC_CACHE_VAL(fu_cv_sys_mounted_getsstat,
  [AC_TRY_LINK([
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/fs_types.h>],
  [struct statfs *stats;
  numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT); ],
    fu_cv_sys_mounted_getsstat=yes,
    fu_cv_sys_mounted_getsstat=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_getsstat)
  if test $fu_cv_sys_mounted_getsstat = yes; then
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_GETFSSTAT,1,[Define if there is a function named getfsstat for reading the list
   of mounted filesystems.  [DEC Alpha running OSF/1]])
  fi
fi

if test -z "$list_mounted_fs"; then
  # AIX.
  AC_MSG_CHECKING([for mntctl function and struct vmount])
  AC_CACHE_VAL(fu_cv_sys_mounted_vmount,
  [AC_TRY_CPP([#include <fshelp.h>],
    fu_cv_sys_mounted_vmount=yes,
    fu_cv_sys_mounted_vmount=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_vmount)
  if test $fu_cv_sys_mounted_vmount = yes; then
    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 filesystems, and there is a system header file
   that declares `struct vmount.'  [AIX]])
  fi
fi

if test -z "$list_mounted_fs"; then
  # SVR3
  AC_MSG_CHECKING([for FIXME existence of three headers])
  AC_CACHE_VAL(fu_cv_sys_mounted_fread_fstyp,
    [AC_TRY_CPP([
#include <sys/statfs.h>
#include <sys/fstyp.h>
#include <mnttab.h>],
		fu_cv_sys_mounted_fread_fstyp=yes,
		fu_cv_sys_mounted_fread_fstyp=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_fread_fstyp)
  if test $fu_cv_sys_mounted_fread_fstyp = yes; then
    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 filesystems, and your system has these header files:
   <sys/fstyp.h> and <sys/statfs.h>.  [SVR3]])
  fi
fi

if test -z "$list_mounted_fs"; then
  # 4.4BSD and DEC OSF/1.
  AC_MSG_CHECKING([for getmntinfo function])
  AC_CACHE_VAL(fu_cv_sys_mounted_getmntinfo,
    [
      ok=
      if test $ac_cv_func_getmntinfo = yes; then
	AC_EGREP_HEADER(f_type;, sys/mount.h,
			ok=yes)
      fi
      test -n "$ok" \
	  && 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
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_GETMNTINFO,1,[Define if there is a function named getmntinfo for reading the list
   of mounted filesystems.  [4.4BSD]])
  fi
fi

# FIXME: add a test for netbsd-1.1 here

if test -z "$list_mounted_fs"; then
  # Ultrix
  AC_MSG_CHECKING([for getmnt function])
  AC_CACHE_VAL(fu_cv_sys_mounted_getmnt,
    [AC_TRY_CPP([
#include <sys/fs_types.h>
#include <sys/mount.h>],
		fu_cv_sys_mounted_getmnt=yes,
		fu_cv_sys_mounted_getmnt=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_getmnt)
  if test $fu_cv_sys_mounted_getmnt = yes; then
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_GETMNT,1,[Define if there is a function named getmnt for reading the list of
   mounted filesystems.  [Ultrix]])
  fi
fi

if test -z "$list_mounted_fs"; then
  # SVR2
  AC_MSG_CHECKING([whether it is possible to resort to fread on /etc/mnttab])
  AC_CACHE_VAL(fu_cv_sys_mounted_fread,
    [AC_TRY_CPP([#include <mnttab.h>],
		fu_cv_sys_mounted_fread=yes,
		fu_cv_sys_mounted_fread=no)])
  AC_MSG_RESULT($fu_cv_sys_mounted_fread)
  if test $fu_cv_sys_mounted_fread = yes; then
    list_mounted_fs=found
    AC_DEFINE(MOUNTED_FREAD,1,[Define if there is no specific function for reading the list of
   mounted filesystems.  fread will be used to read /etc/mnttab.  [SVR2]])
  fi
fi

if test -z "$list_mounted_fs"; then
  AC_MSG_ERROR([could not determine how to read list of mounted filesystems])
  # FIXME -- no need to abort building the whole package
  # Can't build mountlist.c or anything that needs its functions
fi
])