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Diffstat (limited to 'm4/fsusage.m4')
| -rw-r--r-- | m4/fsusage.m4 | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/m4/fsusage.m4 b/m4/fsusage.m4 new file mode 100644 index 0000000..724a863 --- /dev/null +++ b/m4/fsusage.m4 @@ -0,0 +1,306 @@ +# serial 35 +# Obtaining file system usage information. + +# Copyright (C) 1997-1998, 2000-2001, 2003-2023 Free Software Foundation, Inc. +# +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# 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 +]) |