[PATCH] [FreeBSD 15] statvfs() abstraction

[Timur I. Bakeyev]

Samba3 introduces an abstraction function for the statvfs(). FreeBSD has
both statvfs() and statfs(), but man page for stavfs() says:

  The statvfs() and fstatvfs() functions fill the structure pointed to by
  buf with garbage.  This garbage will occasionally bear resemblance to
  file system statistics, but portable applications must not depend on
  this.

So, this patch adds emulation of statvfs() via statfs() plus some
additional heurestics for some FS flags.

There is a (un)related configure check, that makes statfs() being
properly recognized(but test fails anyhow as there is no such a struct
member:)).

With regards,
Timur Bakeyev.
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--- ./source3/configure.in.orig	2009-04-30 07:53:01.000000000 +0000
+++ ./source3/configure.in	2009-06-01 11:49:40.000000000 +0000
@@ -6088,13 +6113,21 @@
 # Start
 AC_CHECK_FUNC(getmntent)
 
-AC_CHECK_HEADERS(sys/statfs.h)
+AC_CHECK_HEADERS(sys/statfs.h sys/mount.h)
 
 AC_MSG_CHECKING([vfs_fileid: checking for statfs() and struct statfs.f_fsid)])
 AC_CACHE_VAL(vfsfileid_cv_statfs,[
 	     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_STATFS_H
 		#include <sys/statfs.h>
+		#endif
 		int main(void)
 		{
 			struct statfs fsd;
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