Right now, resize2fs -P on a dirty filesystem will give you a number;
however, it's probably wrong if the fs is not clean:
# resize2fs -P myimage.img
resize2fs 1.41.9 (22-Aug-2009)
Estimated minimum size of the filesystem: 75623
# e2fsck -fy myimage.img
e2fsck 1.41.9 (22-Aug-2009)
myimage.img: recovering journal
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
myimage.img: ***** FILE SYSTEM WAS MODIFIED *****
myimage.img: 9530/53760 files (0.1% non-contiguous), 24737/98304 blocks
# resize2fs -P myimage.img
resize2fs 1.41.9 (22-Aug-2009)
Estimated minimum size of the filesystem: 32165
We should issue the same "Please run e2fsck ..." message for
-P as we do for an actual resize request.
Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
---
diff --git a/resize/main.c b/resize/main.c
index fd85d90..f5ffb0f 100644
--- a/resize/main.c
+++ b/resize/main.c
@@ -345,6 +345,14 @@ int main (int argc, char ** argv)
min_size = calculate_minimum_resize_size(fs);
if (print_min_size) {
+ if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) ||
+ (fs->super->s_state & EXT2_ERROR_FS) ||
+ ((fs->super->s_state & EXT2_VALID_FS) == 0))) {
+ fprintf(stderr,
+ _("Please run 'e2fsck -f %s' first.\n\n"),
+ device_name);
+ exit(1);
+ }
printf(_("Estimated minimum size of the filesystem: %u\n"),
min_size);
exit(0);
--
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