* lib/fnmatch.c (WIDE_CHAR_SUPPORT): Require HAVE_ISWCTYPE, too.

[gnulib.git] / m4 / fsusage.m4

diff --git a/m4/fsusage.m4 b/m4/fsusage.m4
index 018563b..08bf06c 100644 (file)
--- a/m4/fsusage.m4
+++ b/m4/fsusage.m4
@@ -1,28 +1,41 @@
-#serial 10
+#serial 22
+# Obtaining file system usage information.
 
-# From fileutils/configure.in
+# 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(sys/mount.h sys/vfs.h sys/fs_types.h)
-  jm_FILE_SYSTEM_USAGE([gl_cv_fs_space=yes], [gl_cv_fs_space=no])
+  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 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
@@ -35,6 +48,13 @@ 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,
@@ -54,11 +74,12 @@ if test $ac_fsusage_space = no; then
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/mount.h>
+  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,
@@ -86,11 +107,12 @@ member (AIX, 4.3BSD)])
 #ifdef HAVE_SYS_VFS_H
 #include <sys/vfs.h>
 #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,
@@ -110,10 +132,11 @@ if test $ac_fsusage_space = no; then
   AC_CACHE_VAL(fu_cv_sys_stat_statfs4,
   [AC_TRY_RUN([#include <sys/types.h>
 #include <sys/statfs.h>
+  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,
@@ -138,11 +161,12 @@ member (4.4BSD and NetBSD)])
 #ifdef HAVE_SYS_MOUNT_H
 #include <sys/mount.h>
 #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,
@@ -170,12 +194,13 @@ if test $ac_fsusage_space = no; then
 #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.  */
-  exit (statfs (".", &fsd) != 1);
+  return statfs (".", &fsd) != 1;
   }],
   fu_cv_sys_stat_fs_data=yes,
   fu_cv_sys_stat_fs_data=no,
@@ -194,7 +219,7 @@ if test $ac_fsusage_space = no; then
   AC_TRY_CPP([#include <sys/filsys.h>
     ],
     AC_DEFINE(STAT_READ_FILSYS, 1,
-      [Define if there is no specific function for reading filesystems usage
+      [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
@@ -207,7 +232,7 @@ 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([jm_STATFS_TRUNCATES],
+AC_DEFUN([gl_STATFS_TRUNCATES],
 [
   AC_MSG_CHECKING([for statfs that truncates block counts])
   AC_CACHE_VAL(fu_cv_sys_truncating_statfs,
@@ -217,7 +242,8 @@ 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);]])],
+    [[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
@@ -231,11 +257,9 @@ choke -- this is a workaround for a Sun-specific problem
 ])
 
 
-# Prerequisites of lib/fsusage.c not done by jm_FILE_SYSTEM_USAGE.
+# Prerequisites of lib/fsusage.c not done by gl_FILE_SYSTEM_USAGE.
 AC_DEFUN([gl_PREREQ_FSUSAGE_EXTRA],
 [
-  AC_REQUIRE([jm_AC_TYPE_UINTMAX_T])
-  AC_CHECK_HEADERS_ONCE(fcntl.h)
-  AC_CHECK_HEADERS(dustat.h sys/fs/s5param.h sys/filsys.h sys/statfs.h sys/statvfs.h)
-  jm_STATFS_TRUNCATES
+  AC_CHECK_HEADERS(dustat.h sys/fs/s5param.h sys/filsys.h sys/statfs.h)
+  gl_STATFS_TRUNCATES
 ])