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"
66 #include <sys/statvfs.h>
68 /* Reject implementations, such as MacOS X 10.7, where f_blocks is a
69 32-bit quantity; that commonly limits file systems to 4 TiB, a
70 ridiculously small limit these days. */
72 int check_f_blocks_size[sizeof fsd.f_blocks * CHAR_BIT <= 32 ? -1 : 1];
74 [[statvfs (0, &fsd);]])],
75 [fu_cv_sys_stat_statvfs=yes],
76 [fu_cv_sys_stat_statvfs=no])])
77 if test $fu_cv_sys_stat_statvfs = yes; then
79 AC_DEFINE([STAT_STATVFS], [1],
80 [ Define if there is a function named statvfs. (SVR4)])
84 if test $ac_fsusage_space = no; then
85 # DEC Alpha running OSF/1
86 AC_MSG_CHECKING([for 3-argument statfs function (DEC OSF/1)])
87 AC_CACHE_VAL([fu_cv_sys_stat_statfs3_osf1],
88 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
89 #include <sys/param.h>
90 #include <sys/types.h>
91 #include <sys/mount.h>
97 return statfs (".", &fsd, sizeof (struct statfs)) != 0;
99 [fu_cv_sys_stat_statfs3_osf1=yes],
100 [fu_cv_sys_stat_statfs3_osf1=no],
101 [fu_cv_sys_stat_statfs3_osf1=no])])
102 AC_MSG_RESULT([$fu_cv_sys_stat_statfs3_osf1])
103 if test $fu_cv_sys_stat_statfs3_osf1 = yes; then
105 AC_DEFINE([STAT_STATFS3_OSF1], [1],
106 [ Define if statfs takes 3 args. (DEC Alpha running OSF/1)])
110 if test $ac_fsusage_space = no; then
111 # glibc/Linux, MacOS X, FreeBSD < 5.0, NetBSD < 3.0, OpenBSD < 4.4.
112 # (glibc/{Hurd,kFreeBSD}, FreeBSD >= 5.0, NetBSD >= 3.0,
113 # OpenBSD >= 4.4, AIX, HP-UX, OSF/1, Cygwin already handled above.)
114 # (On IRIX you need to include <sys/statfs.h>, not only <sys/mount.h> and
116 # (On Solaris, statfs has 4 arguments.)
117 AC_MSG_CHECKING([for two-argument statfs with statfs.f_bsize dnl
118 member (AIX, 4.3BSD)])
119 AC_CACHE_VAL([fu_cv_sys_stat_statfs2_bsize],
120 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
121 #ifdef HAVE_SYS_PARAM_H
122 #include <sys/param.h>
124 #ifdef HAVE_SYS_MOUNT_H
125 #include <sys/mount.h>
127 #ifdef HAVE_SYS_VFS_H
135 return statfs (".", &fsd) != 0;
137 [fu_cv_sys_stat_statfs2_bsize=yes],
138 [fu_cv_sys_stat_statfs2_bsize=no],
139 [fu_cv_sys_stat_statfs2_bsize=no])])
140 AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_bsize])
141 if test $fu_cv_sys_stat_statfs2_bsize = yes; then
143 AC_DEFINE([STAT_STATFS2_BSIZE], [1],
144 [ Define if statfs takes 2 args and struct statfs has a field named f_bsize.
145 (4.3BSD, SunOS 4, HP-UX, AIX PS/2)])
149 if test $ac_fsusage_space = no; then
151 # (Solaris already handled above.)
152 AC_MSG_CHECKING([for four-argument statfs (AIX-3.2.5, SVR3)])
153 AC_CACHE_VAL([fu_cv_sys_stat_statfs4],
154 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
155 #include <sys/types.h>
156 #include <sys/statfs.h>
161 return statfs (".", &fsd, sizeof fsd, 0) != 0;
163 [fu_cv_sys_stat_statfs4=yes],
164 [fu_cv_sys_stat_statfs4=no],
165 [fu_cv_sys_stat_statfs4=no])])
166 AC_MSG_RESULT([$fu_cv_sys_stat_statfs4])
167 if test $fu_cv_sys_stat_statfs4 = yes; then
169 AC_DEFINE([STAT_STATFS4], [1],
170 [ Define if statfs takes 4 args. (SVR3, Dynix, old Irix, old AIX, Dolphin)])
174 if test $ac_fsusage_space = no; then
175 # 4.4BSD and older NetBSD
176 # (OSF/1 already handled above.)
177 # (On AIX, you need to include <sys/statfs.h>, not only <sys/mount.h>.)
178 # (On Solaris, statfs has 4 arguments and 'struct statfs' is not declared in
180 AC_MSG_CHECKING([for two-argument statfs with statfs.f_fsize dnl
181 member (4.4BSD and NetBSD)])
182 AC_CACHE_VAL([fu_cv_sys_stat_statfs2_fsize],
183 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
184 #include <sys/types.h>
185 #ifdef HAVE_SYS_PARAM_H
186 #include <sys/param.h>
188 #ifdef HAVE_SYS_MOUNT_H
189 #include <sys/mount.h>
196 return statfs (".", &fsd) != 0;
198 [fu_cv_sys_stat_statfs2_fsize=yes],
199 [fu_cv_sys_stat_statfs2_fsize=no],
200 [fu_cv_sys_stat_statfs2_fsize=no])])
201 AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_fsize])
202 if test $fu_cv_sys_stat_statfs2_fsize = yes; then
204 AC_DEFINE([STAT_STATFS2_FSIZE], [1],
205 [ Define if statfs takes 2 args and struct statfs has a field named f_fsize.
210 if test $ac_fsusage_space = no; then
212 AC_MSG_CHECKING([for two-argument statfs with struct fs_data (Ultrix)])
213 AC_CACHE_VAL([fu_cv_sys_stat_fs_data],
214 [AC_RUN_IFELSE([AC_LANG_SOURCE([[
215 #include <sys/types.h>
216 #ifdef HAVE_SYS_PARAM_H
217 #include <sys/param.h>
219 #ifdef HAVE_SYS_MOUNT_H
220 #include <sys/mount.h>
222 #ifdef HAVE_SYS_FS_TYPES_H
223 #include <sys/fs_types.h>
229 /* Ultrix's statfs returns 1 for success,
230 0 for not mounted, -1 for failure. */
231 return statfs (".", &fsd) != 1;
233 [fu_cv_sys_stat_fs_data=yes],
234 [fu_cv_sys_stat_fs_data=no],
235 [fu_cv_sys_stat_fs_data=no])])
236 AC_MSG_RESULT([$fu_cv_sys_stat_fs_data])
237 if test $fu_cv_sys_stat_fs_data = yes; then
239 AC_DEFINE([STAT_STATFS2_FS_DATA], [1],
240 [ Define if statfs takes 2 args and the second argument has
241 type struct fs_data. (Ultrix)])
245 if test $ac_fsusage_space = no; then
247 # (AIX, HP-UX, OSF/1 already handled above.)
248 AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <sys/filsys.h>
250 [AC_DEFINE([STAT_READ_FILSYS], [1],
251 [Define if there is no specific function for reading file systems usage
252 information and you have the <sys/filsys.h> header file. (SVR2)])
253 ac_fsusage_space=yes])
256 AS_IF([test $ac_fsusage_space = yes], [$1], [$2])
261 # Check for SunOS statfs brokenness wrt partitions 2GB and larger.
262 # If <sys/vfs.h> exists and struct statfs has a member named f_spare,
263 # enable the work-around code in fsusage.c.
264 AC_DEFUN([gl_STATFS_TRUNCATES],
266 AC_MSG_CHECKING([for statfs that truncates block counts])
267 AC_CACHE_VAL([fu_cv_sys_truncating_statfs],
268 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
269 #if !defined(sun) && !defined(__sun)
270 choke -- this is a workaround for a Sun-specific problem
272 #include <sys/types.h>
273 #include <sys/vfs.h>]],
274 [[struct statfs t; long c = *(t.f_spare);
275 if (c) return 0;]])],
276 [fu_cv_sys_truncating_statfs=yes],
277 [fu_cv_sys_truncating_statfs=no])])
278 if test $fu_cv_sys_truncating_statfs = yes; then
279 AC_DEFINE([STATFS_TRUNCATES_BLOCK_COUNTS], [1],
280 [Define if the block counts reported by statfs may be truncated to 2GB
281 and the correct values may be stored in the f_spare array.
282 (SunOS 4.1.2, 4.1.3, and 4.1.3_U1 are reported to have this problem.
283 SunOS 4.1.1 seems not to be affected.)])
285 AC_MSG_RESULT([$fu_cv_sys_truncating_statfs])
289 # Prerequisites of lib/fsusage.c not done by gl_FILE_SYSTEM_USAGE.
290 AC_DEFUN([gl_PREREQ_FSUSAGE_EXTRA],
292 AC_CHECK_HEADERS([dustat.h sys/fs/s5param.h sys/filsys.h sys/statfs.h])