Mercurial > gnulib
view m4/fsusage.m4 @ 7356:0af37e82a5e3
* fsusage.m4 (gl_STATFS_TRUNCATES): Avoid unused variable.
* getdate.m4 (gl_C_COMPOUND_LITERALS): Likewise.
* jm-winsz1.m4 (gl_HEADER_TIOCGWINSZ_IN_TERMIOS_H): Likewise;
also add missing comma that caused broken test.
* link-follow.m4 (gl_AC_FUNC_LINK_FOLLOWS_SYMLINK): Include
stdlib.h, for `abort'.
* ls-mntd-fs.m4 (gl_LIST_MOUNTED_FILE_SYSTEMS): Avoid unused
variables.
* mkdir-slash.m4 (gl_FUNC_MKDIR_TRAILING_SLASH): Check for and
include unistd.h if present, for `rmdir'.
* physmem.m4 (gl_SYS__SYSTEM_CONFIGURATION): Avoid unused
variables.
* putenv.m4 (gl_FUNC_PUTENV): Rewrite using AC_RUN_IFELSE, and
in the process include standard headers for prototypes.
* readutmp.m4 (gl_READUTMP): Require AC_GNU_SOURCE, so utmpxname
gets declared on GNU/Linux.
* rmdir-errno.m4 (gl_FUNC_RMDIR_NOTEMPTY): Check for and include
unistd.h, for `rmdir'.
* time_r.m4 (gl_TIME_R): Avoid unused variables.
author | Ralf Wildenhues <Ralf.Wildenhues@gmx.de> |
---|---|
date | Fri, 22 Sep 2006 18:09:47 +0000 |
parents | 5ebe78cc0cb8 |
children | 1bf30bce8081 |
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#serial 22 # Obtaining file system usage information. # Copyright (C) 1997, 1998, 2000, 2001, 2003, 2004, 2005, 2006 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]) if test $gl_cv_fs_space = yes; then AC_LIBOBJ(fsusage) gl_PREREQ_FSUSAGE_EXTRA fi ]) # 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], [ 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 # 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 # SVR4 AC_CACHE_CHECK([for statvfs function (SVR4)], fu_cv_sys_stat_statvfs, [AC_TRY_LINK([#include <sys/types.h> #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 #include <sys/statvfs.h>], [struct statvfs fsd; 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)]) fi fi if test $ac_fsusage_space = no; then # DEC Alpha running OSF/1 AC_MSG_CHECKING([for 3-argument statfs function (DEC OSF/1)]) AC_CACHE_VAL(fu_cv_sys_stat_statfs3_osf1, [AC_TRY_RUN([ #include <sys/param.h> #include <sys/types.h> #include <sys/mount.h> int main () { struct statfs fsd; fsd.f_fsize = 0; return statfs (".", &fsd, sizeof (struct statfs)) != 0; }], fu_cv_sys_stat_statfs3_osf1=yes, fu_cv_sys_stat_statfs3_osf1=no, fu_cv_sys_stat_statfs3_osf1=no)]) AC_MSG_RESULT($fu_cv_sys_stat_statfs3_osf1) 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 $ac_fsusage_space = no; then # AIX AC_MSG_CHECKING([for two-argument statfs with statfs.bsize dnl member (AIX, 4.3BSD)]) AC_CACHE_VAL(fu_cv_sys_stat_statfs2_bsize, [AC_TRY_RUN([ #ifdef HAVE_SYS_PARAM_H #include <sys/param.h> #endif #ifdef HAVE_SYS_MOUNT_H #include <sys/mount.h> #endif #ifdef HAVE_SYS_VFS_H #include <sys/vfs.h> #endif int main () { struct statfs fsd; fsd.f_bsize = 0; return statfs (".", &fsd) != 0; }], fu_cv_sys_stat_statfs2_bsize=yes, fu_cv_sys_stat_statfs2_bsize=no, fu_cv_sys_stat_statfs2_bsize=no)]) AC_MSG_RESULT($fu_cv_sys_stat_statfs2_bsize) 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, AIX PS/2)]) fi fi if test $ac_fsusage_space = no; then # SVR3 AC_MSG_CHECKING([for four-argument statfs (AIX-3.2.5, SVR3)]) AC_CACHE_VAL(fu_cv_sys_stat_statfs4, [AC_TRY_RUN([#include <sys/types.h> #include <sys/statfs.h> int main () { struct statfs fsd; return statfs (".", &fsd, sizeof fsd, 0) != 0; }], fu_cv_sys_stat_statfs4=yes, fu_cv_sys_stat_statfs4=no, fu_cv_sys_stat_statfs4=no)]) AC_MSG_RESULT($fu_cv_sys_stat_statfs4) 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, Dynix, Irix, Dolphin)]) fi fi if test $ac_fsusage_space = no; then # 4.4BSD and NetBSD AC_MSG_CHECKING([for two-argument statfs with statfs.fsize dnl member (4.4BSD and NetBSD)]) AC_CACHE_VAL(fu_cv_sys_stat_statfs2_fsize, [AC_TRY_RUN([#include <sys/types.h> #ifdef HAVE_SYS_PARAM_H #include <sys/param.h> #endif #ifdef HAVE_SYS_MOUNT_H #include <sys/mount.h> #endif int main () { struct statfs fsd; fsd.f_fsize = 0; return statfs (".", &fsd) != 0; }], fu_cv_sys_stat_statfs2_fsize=yes, fu_cv_sys_stat_statfs2_fsize=no, fu_cv_sys_stat_statfs2_fsize=no)]) AC_MSG_RESULT($fu_cv_sys_stat_statfs2_fsize) 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 if test $ac_fsusage_space = no; then # Ultrix AC_MSG_CHECKING([for two-argument statfs with struct fs_data (Ultrix)]) AC_CACHE_VAL(fu_cv_sys_stat_fs_data, [AC_TRY_RUN([#include <sys/types.h> #ifdef HAVE_SYS_PARAM_H #include <sys/param.h> #endif #ifdef HAVE_SYS_MOUNT_H #include <sys/mount.h> #endif #ifdef HAVE_SYS_FS_TYPES_H #include <sys/fs_types.h> #endif int main () { struct fs_data fsd; /* Ultrix's statfs returns 1 for success, 0 for not mounted, -1 for failure. */ return statfs (".", &fsd) != 1; }], fu_cv_sys_stat_fs_data=yes, fu_cv_sys_stat_fs_data=no, fu_cv_sys_stat_fs_data=no)]) AC_MSG_RESULT($fu_cv_sys_stat_fs_data) if test $fu_cv_sys_stat_fs_data = yes; then ac_fsusage_space=yes AC_DEFINE(STAT_STATFS2_FS_DATA, 1, [ Define if statfs takes 2 args and the second argument has type struct fs_data. (Ultrix)]) fi fi if test $ac_fsusage_space = no; then # SVR2 AC_TRY_CPP([#include <sys/filsys.h> ], AC_DEFINE(STAT_READ_FILSYS, 1, [Define if there is no specific function for reading file systems usage information and you have the <sys/filsys.h> header file. (SVR2)]) ac_fsusage_space=yes) 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 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 <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 $fu_cv_sys_truncating_statfs = yes; then AC_DEFINE(STATFS_TRUNCATES_BLOCK_COUNTS, 1, [Define if the block counts reported by statfs may be truncated to 2GB and the correct values may be stored in the f_spare array. (SunOS 4.1.2, 4.1.3, and 4.1.3_U1 are reported to have this problem. SunOS 4.1.1 seems not to be affected.)]) fi AC_MSG_RESULT($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 ])