Add a new flag, '-C' which enables a special mode that is intended for

catastrophic recovery.  Currently, this mode only validates whether a
cylindergroup has good signature data, and prompts the user to decide
whether to clear it as a whole.

This mode is useful when there is data damage on a disk and you are
working on copy of the original disk, as fsck_ffs(8) tends to abnormally
exit in such case, as a last resort to recover data from the disk.

1 files changed, 2 insertions, 0 deletions

diff --git a/sbin/fsck_ffs/fsck.h b/sbin/fsck_ffs/fsck.h
index f9b38e0..14f49d6 100644
--- a/sbin/fsck_ffs/fsck.h
+++ b/sbin/fsck_ffs/fsck.h
@@ -270,6 +270,7 @@ char	yflag;			/* assume a yes response */
 int	bkgrdflag;		/* use a snapshot to run on an active system */
 int	bflag;			/* location of alternate super block */
 int	debug;			/* output debugging info */
+char	catastrophicflag;	/* run in catastrophic mode */
 int	cvtlevel;		/* convert to newer file system format */
 int	bkgrdcheck;		/* determine if background check is possible */
 int	bkgrdsumadj;		/* whether the kernel have ability to adjust superblock summary */
@@ -335,6 +336,7 @@ void		cacheino(union dinode *dp, ino_t inumber);
 void		catch(int);
 void		catchquit(int);
 int		changeino(ino_t dir, const char *name, ino_t newnum);
+void		check_cgmagic(int cg, struct cg *cgp);
 int		chkrange(ufs2_daddr_t blk, int cnt);
 void		ckfini(int markclean);
 int		ckinode(union dinode *dp, struct inodesc *);