X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ffsusage.m4;h=6277bfa5c5b60ef205574a8903bd64038bf7586d;hb=da8054d48dc22e1c051db54049e005d51a006e69;hp=3459e63b37e3ba1e8b2c5af814e1fc73b32855a7;hpb=5788587b43884f0a61770d4d8fb03f8fe78ba726;p=gnulib.git diff --git a/m4/fsusage.m4 b/m4/fsusage.m4 index 3459e63b3..6277bfa5c 100644 --- a/m4/fsusage.m4 +++ b/m4/fsusage.m4 @@ -1,7 +1,7 @@ -# serial 28 +# serial 30 # Obtaining file system usage information. -# Copyright (C) 1997-1998, 2000-2001, 2003-2011 Free Software Foundation, Inc. +# Copyright (C) 1997-1998, 2000-2001, 2003-2013 Free Software Foundation, Inc. # # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, @@ -29,6 +29,12 @@ AC_DEFUN([gl_FSUSAGE], 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_MSG_NOTICE([checking how to get file system space usage]) ac_fsusage_space=no @@ -36,37 +42,98 @@ 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 +# 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}, MacOS X >= 10.4, FreeBSD >= 5.0, NetBSD >= 3.0, + # 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 -#if (defined __GLIBC__ || defined __UCLIBC__) && defined __linux__ -Do not use statvfs on systems with GNU libc on Linux, because that function -stats all preceding entries in /proc/mounts, and that makes df hang if even -one of the corresponding file systems is hard-mounted, but not available. -statvfs in GNU libc on Hurd, BeOS, Haiku operates differently: it only makes -a system call. -#endif - #ifdef __osf__ "Do not use Tru64's statvfs implementation" #endif -#include ]], - [[struct statvfs fsd; statvfs (0, &fsd);]])], +#include + +struct statvfs fsd; + +#if defined __APPLE__ && defined __MACH__ +#include +/* 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 - AC_DEFINE([STAT_STATVFS], [1], - [ Define if there is a function named statvfs. (SVR4)]) + # 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 + #include + 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 $fu_cv_sys_stat_statvfs64 = yes; then + AC_DEFINE([STAT_STATVFS64], [1], + [ Define if statvfs64 should be preferred over statvfs.]) + else + AC_DEFINE([STAT_STATVFS], [1], + [ Define if there is a function named statvfs. (SVR4)]) + fi fi fi +# Check for this unconditionally so we have a +# good fallback on glibc/Linux > 2.6 < 2.6.36 +AC_MSG_CHECKING([for two-argument statfs with statfs.f_frsize member]) +AC_CACHE_VAL([fu_cv_sys_stat_statfs2_frsize], +[AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#ifdef HAVE_SYS_PARAM_H +#include +#endif +#ifdef HAVE_SYS_MOUNT_H +#include +#endif +#ifdef HAVE_SYS_VFS_H +#include +#endif + int + main () + { + struct statfs fsd; + fsd.f_frsize = 0; + return statfs (".", &fsd) != 0; + }]])], + [fu_cv_sys_stat_statfs2_frsize=yes], + [fu_cv_sys_stat_statfs2_frsize=no], + [fu_cv_sys_stat_statfs2_frsize=no])]) +AC_MSG_RESULT([$fu_cv_sys_stat_statfs2_frsize]) +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_MSG_CHECKING([for 3-argument statfs function (DEC OSF/1)]) @@ -94,8 +161,8 @@ if test $ac_fsusage_space = no; then fi if test $ac_fsusage_space = no; then - # glibc/Linux, MacOS X < 10.4, FreeBSD < 5.0, NetBSD < 3.0, OpenBSD < 4.4. - # (glibc/{Hurd,kFreeBSD}, MacOS X >= 10.4, FreeBSD >= 5.0, NetBSD >= 3.0, + # 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 , not only and # .)