Use f_bavail for diskspace calculations

This should make pacman's behavior consistent with GNU coreutils df,
as well as follow advice from affected filesystems' devs as well as
`man statvfs`.

This fixes FS#37402

Signed-off-by: Martin Kühne <mysatyre@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>
(cherry picked from commit 8c55c0096c355e973ce6111cb25a1c4fa05953cf)

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/libalpm/diskspace.c b/lib/libalpm/diskspace.c
index da4ad560..55343c16 100644
--- a/lib/libalpm/diskspace.c
+++ b/lib/libalpm/diskspace.c
@@ -348,11 +348,11 @@ static int check_mountpoint(alpm_handle_t *handle, alpm_mountpoint_t *mp)
 	_alpm_log(handle, ALPM_LOG_DEBUG,
 			"partition %s, needed %jd, cushion %ju, free %ju\n",
 			mp->mount_dir, (intmax_t)mp->max_blocks_needed,
-			(uintmax_t)cushion, (uintmax_t)mp->fsp.f_bfree);
-	if(needed >= 0 && (fsblkcnt_t)needed > mp->fsp.f_bfree) {
+			(uintmax_t)cushion, (uintmax_t)mp->fsp.f_bavail);
+	if(needed >= 0 && (fsblkcnt_t)needed > mp->fsp.f_bavail) {
 		_alpm_log(handle, ALPM_LOG_ERROR,
 				_("Partition %s too full: %jd blocks needed, %ju blocks free\n"),
-				mp->mount_dir, (intmax_t)needed, (uintmax_t)mp->fsp.f_bfree);
+				mp->mount_dir, (intmax_t)needed, (uintmax_t)mp->fsp.f_bavail);
 		return 1;
 	}
 	return 0;