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 # AIX >= 5.2 has statvfs64 that has a wider f_blocks field than statvfs.
85 # glibc, HP-UX, IRIX, Solaris have statvfs64 as well, but on these systems
86 # statvfs with large-file support is already equivalent to statvfs64.
87 AC_CACHE_CHECK([whether to use statvfs64],
88 [fu_cv_sys_stat_statvfs64],
91 [[#include <sys/types.h>
92 #include <sys/statvfs.h>
94 int check_f_blocks_larger_in_statvfs64
95 [sizeof (((struct statvfs64 *) 0)->f_blocks)
96 > sizeof (((struct statvfs *) 0)->f_blocks)
99 [[statvfs64 (0, &fsd);]])],
100 [fu_cv_sys_stat_statvfs64=yes],
101 [fu_cv_sys_stat_statvfs64=no])
103 if test $fu_cv_sys_stat_statvfs64 = yes; then
104 AC_DEFINE([STAT_STATVFS64], [1],
105 [ Define if statvfs64 should be preferred over statvfs.])
107 AC_DEFINE([STAT_STATVFS], [1],
108 [ Define if there is a function named statvfs. (SVR4)])
113 if test $ac_fsusage_space = no; then
114 # DEC Alpha running OSF/1
115 AC_MSG_CHECKING([for 3-argument statfs function (DEC OSF/1)])
116 AC_CACHE_VAL([fu_cv_sys_stat_statfs3_osf1],
117 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
118 #include <sys/param.h>
119 #include <sys/types.h>
120 #include <sys/mount.h>
126 return statfs (".", &fsd, sizeof (struct statfs)) != 0;
128 [fu_cv_sys_stat_statfs3_osf1=yes],
129 [fu_cv_sys_stat_statfs3_osf1=no],
130 [fu_cv_sys_stat_statfs3_osf1=no])])
131 AC_MSG_RESULT([$fu_cv_sys_stat_statfs3_osf1])
132 if test $fu_cv_sys_stat_statfs3_osf1 = yes; then
134 AC_DEFINE([STAT_STATFS3_OSF1], [1],
135 [ Define if statfs takes 3 args. (DEC Alpha running OSF/1)])
139 if test $ac_fsusage_space = no; then
140 # glibc/Linux, MacOS X, FreeBSD < 5.0, NetBSD < 3.0, OpenBSD < 4.4.
141 # (glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
142 # OpenBSD >= 4.4, AIX, HP-UX, OSF/1, Cygwin already handled above.)
143 # (On IRIX you need to include <sys/statfs.h>, not only <sys/mount.h> and
145 # (On Solaris, statfs has 4 arguments.)
146 AC_MSG_CHECKING([for two-argument statfs with statfs.f_bsize dnl
147 member (AIX, 4.3BSD)])
148 AC_CACHE_VAL([fu_cv_sys_stat_statfs2_bsize],
149 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
150 #ifdef HAVE_SYS_PARAM_H
151 #include <sys/param.h>
153 #ifdef HAVE_SYS_MOUNT_H
154 #include <sys/mount.h>
156 #ifdef HAVE_SYS_VFS_H
164 return statfs (".", &fsd) != 0;
166 [fu_cv_sys_stat_statfs2_bsize=yes],
167 [fu_cv_sys_stat_statfs2_bsize=no],
168 [fu_cv_sys_stat_statfs2_bsize=no])])
169 AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_bsize])
170 if test $fu_cv_sys_stat_statfs2_bsize = yes; then
172 AC_DEFINE([STAT_STATFS2_BSIZE], [1],
173 [ Define if statfs takes 2 args and struct statfs has a field named f_bsize.
174 (4.3BSD, SunOS 4, HP-UX, AIX PS/2)])
178 if test $ac_fsusage_space = no; then
180 # (Solaris already handled above.)
181 AC_MSG_CHECKING([for four-argument statfs (AIX-3.2.5, SVR3)])
182 AC_CACHE_VAL([fu_cv_sys_stat_statfs4],
183 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
184 #include <sys/types.h>
185 #include <sys/statfs.h>
190 return statfs (".", &fsd, sizeof fsd, 0) != 0;
192 [fu_cv_sys_stat_statfs4=yes],
193 [fu_cv_sys_stat_statfs4=no],
194 [fu_cv_sys_stat_statfs4=no])])
195 AC_MSG_RESULT([$fu_cv_sys_stat_statfs4])
196 if test $fu_cv_sys_stat_statfs4 = yes; then
198 AC_DEFINE([STAT_STATFS4], [1],
199 [ Define if statfs takes 4 args. (SVR3, Dynix, old Irix, old AIX, Dolphin)])
203 if test $ac_fsusage_space = no; then
204 # 4.4BSD and older NetBSD
205 # (OSF/1 already handled above.)
206 # (On AIX, you need to include <sys/statfs.h>, not only <sys/mount.h>.)
207 # (On Solaris, statfs has 4 arguments and 'struct statfs' is not declared in
209 AC_MSG_CHECKING([for two-argument statfs with statfs.f_fsize dnl
210 member (4.4BSD and NetBSD)])
211 AC_CACHE_VAL([fu_cv_sys_stat_statfs2_fsize],
212 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
213 #include <sys/types.h>
214 #ifdef HAVE_SYS_PARAM_H
215 #include <sys/param.h>
217 #ifdef HAVE_SYS_MOUNT_H
218 #include <sys/mount.h>
225 return statfs (".", &fsd) != 0;
227 [fu_cv_sys_stat_statfs2_fsize=yes],
228 [fu_cv_sys_stat_statfs2_fsize=no],
229 [fu_cv_sys_stat_statfs2_fsize=no])])
230 AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_fsize])
231 if test $fu_cv_sys_stat_statfs2_fsize = yes; then
233 AC_DEFINE([STAT_STATFS2_FSIZE], [1],
234 [ Define if statfs takes 2 args and struct statfs has a field named f_fsize.
239 if test $ac_fsusage_space = no; then
241 AC_MSG_CHECKING([for two-argument statfs with struct fs_data (Ultrix)])
242 AC_CACHE_VAL([fu_cv_sys_stat_fs_data],
243 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
244 #include <sys/types.h>
245 #ifdef HAVE_SYS_PARAM_H
246 #include <sys/param.h>
248 #ifdef HAVE_SYS_MOUNT_H
249 #include <sys/mount.h>
251 #ifdef HAVE_SYS_FS_TYPES_H
252 #include <sys/fs_types.h>
258 /* Ultrix's statfs returns 1 for success,
259 0 for not mounted, -1 for failure. */
260 return statfs (".", &fsd) != 1;
262 [fu_cv_sys_stat_fs_data=yes],
263 [fu_cv_sys_stat_fs_data=no],
264 [fu_cv_sys_stat_fs_data=no])])
265 AC_MSG_RESULT([$fu_cv_sys_stat_fs_data])
266 if test $fu_cv_sys_stat_fs_data = yes; then
268 AC_DEFINE([STAT_STATFS2_FS_DATA], [1],
269 [ Define if statfs takes 2 args and the second argument has
270 type struct fs_data. (Ultrix)])
274 if test $ac_fsusage_space = no; then
276 # (AIX, HP-UX, OSF/1 already handled above.)
277 AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <sys/filsys.h>
279 [AC_DEFINE([STAT_READ_FILSYS], [1],
280 [Define if there is no specific function for reading file systems usage
281 information and you have the <sys/filsys.h> header file. (SVR2)])
282 ac_fsusage_space=yes])
285 AS_IF([test $ac_fsusage_space = yes], [$1], [$2])
290 # Check for SunOS statfs brokenness wrt partitions 2GB and larger.
291 # If <sys/vfs.h> exists and struct statfs has a member named f_spare,
292 # enable the work-around code in fsusage.c.
293 AC_DEFUN([gl_STATFS_TRUNCATES],
295 AC_MSG_CHECKING([for statfs that truncates block counts])
296 AC_CACHE_VAL([fu_cv_sys_truncating_statfs],
297 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
298 #if !defined(sun) && !defined(__sun)
299 choke -- this is a workaround for a Sun-specific problem
301 #include <sys/types.h>
302 #include <sys/vfs.h>]],
303 [[struct statfs t; long c = *(t.f_spare);
304 if (c) return 0;]])],
305 [fu_cv_sys_truncating_statfs=yes],
306 [fu_cv_sys_truncating_statfs=no])])
307 if test $fu_cv_sys_truncating_statfs = yes; then
308 AC_DEFINE([STATFS_TRUNCATES_BLOCK_COUNTS], [1],
309 [Define if the block counts reported by statfs may be truncated to 2GB
310 and the correct values may be stored in the f_spare array.
311 (SunOS 4.1.2, 4.1.3, and 4.1.3_U1 are reported to have this problem.
312 SunOS 4.1.1 seems not to be affected.)])
314 AC_MSG_RESULT([$fu_cv_sys_truncating_statfs])
318 # Prerequisites of lib/fsusage.c not done by gl_FILE_SYSTEM_USAGE.
319 AC_DEFUN([gl_PREREQ_FSUSAGE_EXTRA],
321 AC_CHECK_HEADERS([dustat.h sys/fs/s5param.h sys/filsys.h sys/statfs.h])