[PATCH] LFS support for mountlist.c

[Jindrich Novy <jnovy redhat com>]

Hello mc-devel,

I wrote a patch that adds large filesystem support to mountlist.c, i.e.
prevents a truncation to lower 32bits for some data acquired by the
statvfs call. The last hunk fixes typo in acinclude.m4.

Cheers,
Jindrich

-- 
Jindrich Novy <jnovy redhat com>, http://people.redhat.com/jnovy/

The worst evil in the world is refusal to think.

--- mc-4.6.1a/src/mountlist.c.64bit	2005-02-08 23:33:52.000000000 +0100
+++ mc-4.6.1a/src/mountlist.c	2005-05-10 17:09:24.122853504 +0200
@@ -131,11 +131,19 @@ struct mount_entry
 
 struct fs_usage
 {
+#ifndef HAVE_SYS_STATVFS_H
   long fsu_blocks;		/* Total blocks. */
   long fsu_bfree;		/* Free blocks available to superuser. */
   long fsu_bavail;		/* Free blocks available to non-superuser. */
   long fsu_files;		/* Total file nodes. */
   long fsu_ffree;		/* Free file nodes. */
+#else	/* We have sys/statvfs.h, use proper data types when _FILE_OFFSET_BITS=64 */
+  fsblkcnt_t fsu_blocks;
+  fsblkcnt_t fsu_bfree;
+  fsblkcnt_t fsu_bavail;
+  fsblkcnt_t fsu_files;
+  fsblkcnt_t fsu_ffree;
+#endif /* HAVE_SYS_STATVFS_H */
 };
 
 static int get_fs_usage (char *path, struct fs_usage *fsp);
@@ -665,6 +673,7 @@ my_statfs (struct my_statfs *myfs_stats,
    BLOCKS FROMSIZE-byte blocks, rounding away from zero.
    TOSIZE must be positive.  Return -1 if FROMSIZE is not positive.  */
 
+#if !defined(HAVE_SYS_STATFS_H) || !defined(STAT_STATVFS)
 static long
 fs_adjust_blocks (long blocks, int fromsize, int tosize)
 {
@@ -672,13 +681,21 @@ fs_adjust_blocks (long blocks, int froms
 	abort ();
     if (fromsize <= 0)
 	return -1;
-
+#else
+static fsblkcnt_t
+fs_adjust_blocks (fsblkcnt_t blocks, unsigned long fromsize, unsigned long tosize)
+{
+    if (!tosize)
+        abort ();
+    if (!fromsize)
+        return -1;
+#endif
     if (fromsize == tosize)	/* E.g., from 512 to 512.  */
 	return blocks;
     else if (fromsize > tosize)	/* E.g., from 2048 to 512.  */
 	return blocks * (fromsize / tosize);
     else			/* E.g., from 256 to 512.  */
-	return (blocks + (blocks < 0 ? -1 : 1)) / (tosize / fromsize);
+	return (blocks + 1) / (tosize / fromsize);
 }
 
 #if defined(_AIX) && defined(_I386)
--- mc-4.6.1a/acinclude.m4.64bit	2005-05-10 17:09:24.084859280 +0200
+++ mc-4.6.1a/acinclude.m4	2005-05-10 17:09:24.124853200 +0200
@@ -501,7 +501,7 @@ dnl job is to detect a method to get fil
       if test $ac_cv_func_statvfs = yes; then
 	space=yes
 	AC_DEFINE(STAT_STATVFS, 1,
-		  [Define if function `statfs' can be used])
+		  [Define if function `statvfs' can be used])
       fi
     fi