X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ffsusage.m4;h=18eedbca5664742ce53e3252134105563b21096d;hb=f664d100c1b6807491654bfdf6d90e2d9fd5b4fd;hp=49ca817f36a776c05b3aed04fb84891111cbeeb0;hpb=dee44991fb780afe18bcac0cf361cb05f5553ae8;p=gnulib.git diff --git a/m4/fsusage.m4 b/m4/fsusage.m4 index 49ca817f3..18eedbca5 100644 --- a/m4/fsusage.m4 +++ b/m4/fsusage.m4 @@ -1,17 +1,40 @@ -#serial 3 +#serial 23 +# Obtaining file system usage information. -# From fileutils/configure.in +# Copyright (C) 1997, 1998, 2000, 2001, 2003-2007 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 + #endif]]) + gl_FILE_SYSTEM_USAGE([gl_cv_fs_space=yes], [gl_cv_fs_space=no]) + if test $gl_cv_fs_space = yes; then + AC_LIBOBJ(fsusage) + gl_PREREQ_FSUSAGE_EXTRA + fi +]) -# Try to determine how a program can obtain filesystem usage information. +# 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. # -# jm_FILE_SYSTEM_USAGE([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) +# gl_FILE_SYSTEM_USAGE([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) -AC_DEFUN(jm_FILE_SYSTEM_USAGE, +AC_DEFUN([gl_FILE_SYSTEM_USAGE], [ -echo "checking how to get filesystem space usage..." +AC_MSG_NOTICE([checking how to get file system space usage]) ac_fsusage_space=no # Perform only the link test since it seems there are no variants of the @@ -24,6 +47,18 @@ if test $ac_fsusage_space = no; then # SVR4 AC_CACHE_CHECK([for statvfs function (SVR4)], fu_cv_sys_stat_statvfs, [AC_TRY_LINK([#include +#if defined __GLIBC__ && !defined __BEOS__ +Do not use statvfs on systems with GNU libc, 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 BeOS 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);], fu_cv_sys_stat_statvfs=yes, @@ -43,11 +78,12 @@ if test $ac_fsusage_space = no; then #include #include #include + int main () { struct statfs fsd; fsd.f_fsize = 0; - exit (statfs (".", &fsd, sizeof (struct statfs))); + return statfs (".", &fsd, sizeof (struct statfs)) != 0; }], fu_cv_sys_stat_statfs3_osf1=yes, fu_cv_sys_stat_statfs3_osf1=no, @@ -75,11 +111,12 @@ member (AIX, 4.3BSD)]) #ifdef HAVE_SYS_VFS_H #include #endif + int main () { struct statfs fsd; fsd.f_bsize = 0; - exit (statfs (".", &fsd)); + return statfs (".", &fsd) != 0; }], fu_cv_sys_stat_statfs2_bsize=yes, fu_cv_sys_stat_statfs2_bsize=no, @@ -99,10 +136,11 @@ if test $ac_fsusage_space = no; then AC_CACHE_VAL(fu_cv_sys_stat_statfs4, [AC_TRY_RUN([#include #include + int main () { struct statfs fsd; - exit (statfs (".", &fsd, sizeof fsd, 0)); + return statfs (".", &fsd, sizeof fsd, 0) != 0; }], fu_cv_sys_stat_statfs4=yes, fu_cv_sys_stat_statfs4=no, @@ -127,11 +165,12 @@ member (4.4BSD and NetBSD)]) #ifdef HAVE_SYS_MOUNT_H #include #endif + int main () { struct statfs fsd; fsd.f_fsize = 0; - exit (statfs (".", &fsd)); + return statfs (".", &fsd) != 0; }], fu_cv_sys_stat_statfs2_fsize=yes, fu_cv_sys_stat_statfs2_fsize=no, @@ -159,12 +198,13 @@ if test $ac_fsusage_space = no; then #ifdef HAVE_SYS_FS_TYPES_H #include #endif + int main () { struct fs_data fsd; /* Ultrix's statfs returns 1 for success, 0 for not mounted, -1 for failure. */ - exit (statfs (".", &fsd) != 1); + return statfs (".", &fsd) != 1; }], fu_cv_sys_stat_fs_data=yes, fu_cv_sys_stat_fs_data=no, @@ -179,14 +219,51 @@ if test $ac_fsusage_space = no; then fi if test $ac_fsusage_space = no; then -# SVR2 -AC_TRY_CPP([#include ], - AC_DEFINE(STAT_READ_FILSYS, 1, -[ Define if there is no specific function for reading filesystems usage - information and you have the header file. (SVR2)]) - ac_fsusage_space=yes) + # SVR2 + AC_TRY_CPP([#include + ], + AC_DEFINE(STAT_READ_FILSYS, 1, + [Define if there is no specific function for reading file systems usage + information and you have the header file. (SVR2)]) + ac_fsusage_space=yes) fi -AC_SHELL_IFELSE([test $ac_fsusage_space = yes], [$1], [$2])dnl +AS_IF([test $ac_fsusage_space = yes], [$1], [$2]) ]) + + +# Check for SunOS statfs brokenness wrt partitions 2GB and larger. +# If exists and struct statfs has a member named f_spare, +# enable the work-around code in fsusage.c. +AC_DEFUN([gl_STATFS_TRUNCATES], +[ + AC_MSG_CHECKING([for statfs that truncates block counts]) + AC_CACHE_VAL(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 +#include ]], + [[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 $fu_cv_sys_truncating_statfs = yes; then + AC_DEFINE(STATFS_TRUNCATES_BLOCK_COUNTS, 1, + [Define if the block counts reported by statfs may be truncated to 2GB + and the correct values may be stored in the f_spare array. + (SunOS 4.1.2, 4.1.3, and 4.1.3_U1 are reported to have this problem. + SunOS 4.1.1 seems not to be affected.)]) + fi + AC_MSG_RESULT($fu_cv_sys_truncating_statfs) +]) + + +# Prerequisites of lib/fsusage.c not done by gl_FILE_SYSTEM_USAGE. +AC_DEFUN([gl_PREREQ_FSUSAGE_EXTRA], +[ + AC_CHECK_HEADERS(dustat.h sys/fs/s5param.h sys/filsys.h sys/statfs.h) + gl_STATFS_TRUNCATES +])