2 # Obtaining file system usage information.
4 # Copyright (C) 1997-1998, 2000-2001, 2003-2011 Free Software Foundation, Inc.
6 # This file is free software; the Free Software Foundation
7 # gives unlimited permission to copy and/or distribute it,
8 # with or without modifications, as long as this notice is preserved.
10 # Written by Jim Meyering.
12 AC_DEFUN([gl_FSUSAGE],
14 AC_CHECK_HEADERS_ONCE([sys/param.h])
15 AC_CHECK_HEADERS_ONCE([sys/vfs.h sys/fs_types.h])
16 AC_CHECK_HEADERS([sys/mount.h], [], [],
19 #include <sys/param.h>
21 gl_FILE_SYSTEM_USAGE([gl_cv_fs_space=yes], [gl_cv_fs_space=no])
24 # Try to determine how a program can obtain file system usage information.
25 # If successful, define the appropriate symbol (see fsusage.c) and
26 # execute ACTION-IF-FOUND. Otherwise, execute ACTION-IF-NOT-FOUND.
28 # gl_FILE_SYSTEM_USAGE([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
30 AC_DEFUN([gl_FILE_SYSTEM_USAGE],
32 dnl Enable large-file support. This has the effect of changing the size
33 dnl of field f_blocks in 'struct statvfs' from 32 bit to 64 bit on
34 dnl glibc/Hurd, HP-UX 11, Solaris (32-bit mode). It also changes the size
35 dnl of field f_blocks in 'struct statfs' from 32 bit to 64 bit on
36 dnl MacOS X >= 10.5 (32-bit mode).
37 AC_REQUIRE([AC_SYS_LARGEFILE])
39 AC_MSG_NOTICE([checking how to get file system space usage])
42 # Perform only the link test since it seems there are no variants of the
43 # statvfs function. This check is more than just AC_CHECK_FUNCS([statvfs])
44 # because that got a false positive on SCO OSR5. Adding the declaration
45 # of a `struct statvfs' causes this test to fail (as it should) on such
46 # systems. That system is reported to work fine with STAT_STATFS4 which
47 # is what it gets when this test fails.
48 if test $ac_fsusage_space = no; then
49 # glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
50 # OpenBSD >= 4.4, AIX, HP-UX, IRIX, Solaris, Cygwin, Interix, BeOS.
51 AC_CACHE_CHECK([for statvfs function (SVR4)], [fu_cv_sys_stat_statvfs],
52 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
53 #if (defined __GLIBC__ || defined __UCLIBC__) && defined __linux__
54 Do not use statvfs on systems with GNU libc on Linux, because that function
55 stats all preceding entries in /proc/mounts, and that makes df hang if even
56 one of the corresponding file systems is hard-mounted, but not available.
57 statvfs in GNU libc on Hurd, BeOS, Haiku operates differently: it only makes
62 "Do not use Tru64's statvfs implementation"
65 #include <sys/statvfs.h>
69 #if defined __APPLE__ && defined __MACH__
71 /* On MacOS X >= 10.5, f_blocks in 'struct statvfs' is a 32-bit quantity;
72 that commonly limits file systems to 4 TiB. Whereas f_blocks in
73 'struct statfs' is a 64-bit type, thanks to the large-file support
74 that was enabled above. In this case, don't use statvfs(); use statfs()
76 int check_f_blocks_size[sizeof fsd.f_blocks * CHAR_BIT <= 32 ? -1 : 1];
79 [[statvfs (0, &fsd);]])],
80 [fu_cv_sys_stat_statvfs=yes],
81 [fu_cv_sys_stat_statvfs=no])])
82 if test $fu_cv_sys_stat_statvfs = yes; then
84 AC_DEFINE([STAT_STATVFS], [1],
85 [ Define if there is a function named statvfs. (SVR4)])
89 if test $ac_fsusage_space = no; then
90 # DEC Alpha running OSF/1
91 AC_MSG_CHECKING([for 3-argument statfs function (DEC OSF/1)])
92 AC_CACHE_VAL([fu_cv_sys_stat_statfs3_osf1],
93 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
94 #include <sys/param.h>
95 #include <sys/types.h>
96 #include <sys/mount.h>
102 return statfs (".", &fsd, sizeof (struct statfs)) != 0;
104 [fu_cv_sys_stat_statfs3_osf1=yes],
105 [fu_cv_sys_stat_statfs3_osf1=no],
106 [fu_cv_sys_stat_statfs3_osf1=no])])
107 AC_MSG_RESULT([$fu_cv_sys_stat_statfs3_osf1])
108 if test $fu_cv_sys_stat_statfs3_osf1 = yes; then
110 AC_DEFINE([STAT_STATFS3_OSF1], [1],
111 [ Define if statfs takes 3 args. (DEC Alpha running OSF/1)])
115 if test $ac_fsusage_space = no; then
116 # glibc/Linux, MacOS X, FreeBSD < 5.0, NetBSD < 3.0, OpenBSD < 4.4.
117 # (glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
118 # OpenBSD >= 4.4, AIX, HP-UX, OSF/1, Cygwin already handled above.)
119 # (On IRIX you need to include <sys/statfs.h>, not only <sys/mount.h> and
121 # (On Solaris, statfs has 4 arguments.)
122 AC_MSG_CHECKING([for two-argument statfs with statfs.f_bsize dnl
123 member (AIX, 4.3BSD)])
124 AC_CACHE_VAL([fu_cv_sys_stat_statfs2_bsize],
125 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
126 #ifdef HAVE_SYS_PARAM_H
127 #include <sys/param.h>
129 #ifdef HAVE_SYS_MOUNT_H
130 #include <sys/mount.h>
132 #ifdef HAVE_SYS_VFS_H
140 return statfs (".", &fsd) != 0;
142 [fu_cv_sys_stat_statfs2_bsize=yes],
143 [fu_cv_sys_stat_statfs2_bsize=no],
144 [fu_cv_sys_stat_statfs2_bsize=no])])
145 AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_bsize])
146 if test $fu_cv_sys_stat_statfs2_bsize = yes; then
148 AC_DEFINE([STAT_STATFS2_BSIZE], [1],
149 [ Define if statfs takes 2 args and struct statfs has a field named f_bsize.
150 (4.3BSD, SunOS 4, HP-UX, AIX PS/2)])
154 if test $ac_fsusage_space = no; then
156 # (Solaris already handled above.)
157 AC_MSG_CHECKING([for four-argument statfs (AIX-3.2.5, SVR3)])
158 AC_CACHE_VAL([fu_cv_sys_stat_statfs4],
159 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
160 #include <sys/types.h>
161 #include <sys/statfs.h>
166 return statfs (".", &fsd, sizeof fsd, 0) != 0;
168 [fu_cv_sys_stat_statfs4=yes],
169 [fu_cv_sys_stat_statfs4=no],
170 [fu_cv_sys_stat_statfs4=no])])
171 AC_MSG_RESULT([$fu_cv_sys_stat_statfs4])
172 if test $fu_cv_sys_stat_statfs4 = yes; then
174 AC_DEFINE([STAT_STATFS4], [1],
175 [ Define if statfs takes 4 args. (SVR3, Dynix, old Irix, old AIX, Dolphin)])
179 if test $ac_fsusage_space = no; then
180 # 4.4BSD and older NetBSD
181 # (OSF/1 already handled above.)
182 # (On AIX, you need to include <sys/statfs.h>, not only <sys/mount.h>.)
183 # (On Solaris, statfs has 4 arguments and 'struct statfs' is not declared in
185 AC_MSG_CHECKING([for two-argument statfs with statfs.f_fsize dnl
186 member (4.4BSD and NetBSD)])
187 AC_CACHE_VAL([fu_cv_sys_stat_statfs2_fsize],
188 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
189 #include <sys/types.h>
190 #ifdef HAVE_SYS_PARAM_H
191 #include <sys/param.h>
193 #ifdef HAVE_SYS_MOUNT_H
194 #include <sys/mount.h>
201 return statfs (".", &fsd) != 0;
203 [fu_cv_sys_stat_statfs2_fsize=yes],
204 [fu_cv_sys_stat_statfs2_fsize=no],
205 [fu_cv_sys_stat_statfs2_fsize=no])])
206 AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_fsize])
207 if test $fu_cv_sys_stat_statfs2_fsize = yes; then
209 AC_DEFINE([STAT_STATFS2_FSIZE], [1],
210 [ Define if statfs takes 2 args and struct statfs has a field named f_fsize.
215 if test $ac_fsusage_space = no; then
217 AC_MSG_CHECKING([for two-argument statfs with struct fs_data (Ultrix)])
218 AC_CACHE_VAL([fu_cv_sys_stat_fs_data],
219 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
220 #include <sys/types.h>
221 #ifdef HAVE_SYS_PARAM_H
222 #include <sys/param.h>
224 #ifdef HAVE_SYS_MOUNT_H
225 #include <sys/mount.h>
227 #ifdef HAVE_SYS_FS_TYPES_H
228 #include <sys/fs_types.h>
234 /* Ultrix's statfs returns 1 for success,
235 0 for not mounted, -1 for failure. */
236 return statfs (".", &fsd) != 1;
238 [fu_cv_sys_stat_fs_data=yes],
239 [fu_cv_sys_stat_fs_data=no],
240 [fu_cv_sys_stat_fs_data=no])])
241 AC_MSG_RESULT([$fu_cv_sys_stat_fs_data])
242 if test $fu_cv_sys_stat_fs_data = yes; then
244 AC_DEFINE([STAT_STATFS2_FS_DATA], [1],
245 [ Define if statfs takes 2 args and the second argument has
246 type struct fs_data. (Ultrix)])
250 if test $ac_fsusage_space = no; then
252 # (AIX, HP-UX, OSF/1 already handled above.)
253 AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <sys/filsys.h>
255 [AC_DEFINE([STAT_READ_FILSYS], [1],
256 [Define if there is no specific function for reading file systems usage
257 information and you have the <sys/filsys.h> header file. (SVR2)])
258 ac_fsusage_space=yes])
261 AS_IF([test $ac_fsusage_space = yes], [$1], [$2])
266 # Check for SunOS statfs brokenness wrt partitions 2GB and larger.
267 # If <sys/vfs.h> exists and struct statfs has a member named f_spare,
268 # enable the work-around code in fsusage.c.
269 AC_DEFUN([gl_STATFS_TRUNCATES],
271 AC_MSG_CHECKING([for statfs that truncates block counts])
272 AC_CACHE_VAL([fu_cv_sys_truncating_statfs],
273 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
274 #if !defined(sun) && !defined(__sun)
275 choke -- this is a workaround for a Sun-specific problem
277 #include <sys/types.h>
278 #include <sys/vfs.h>]],
279 [[struct statfs t; long c = *(t.f_spare);
280 if (c) return 0;]])],
281 [fu_cv_sys_truncating_statfs=yes],
282 [fu_cv_sys_truncating_statfs=no])])
283 if test $fu_cv_sys_truncating_statfs = yes; then
284 AC_DEFINE([STATFS_TRUNCATES_BLOCK_COUNTS], [1],
285 [Define if the block counts reported by statfs may be truncated to 2GB
286 and the correct values may be stored in the f_spare array.
287 (SunOS 4.1.2, 4.1.3, and 4.1.3_U1 are reported to have this problem.
288 SunOS 4.1.1 seems not to be affected.)])
290 AC_MSG_RESULT([$fu_cv_sys_truncating_statfs])
294 # Prerequisites of lib/fsusage.c not done by gl_FILE_SYSTEM_USAGE.
295 AC_DEFUN([gl_PREREQ_FSUSAGE_EXTRA],
297 AC_CHECK_HEADERS([dustat.h sys/fs/s5param.h sys/filsys.h sys/statfs.h])