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# fsusage.m4
# serial 35
dnl Copyright (C) 1997-1998, 2000-2001, 2003-2024 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.
# Obtaining file system usage information.
# 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 workaround 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
])
|
