From 6d0145f3a667675b8baab48bfe9129aa9f745af0 Mon Sep 17 00:00:00 2001
From: Andrea Mazzoleni <amadvance@users.sourceforge.net>
Date: Sat, 3 Sep 2011 10:12:13 +0200
Subject: [PATCH] Lists all the empty disks when asking for --force-empty.

---
 HISTORY |  3 ++-
 scan.c  | 23 ++++++++++++++++++-----
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/HISTORY b/HISTORY
index b16b53c1..21aef339 100644
--- a/HISTORY
+++ b/HISTORY
@@ -6,7 +6,8 @@ SnapRAID HISTORY
 * In "diff" now it recognizes the reuse of inodes.
 * Windows hidden files are now backuped like any other files.
 * Symbolic links are now saved in *nix. Not supported in Windows.
-* When fixing the original modification time of the files is restored.
+* In fixing the original modification time of the files is also restored.
+* The message asking to use the --force-empty option now lists all the empty disks.
 
 1.5 2011/7
 ==========
diff --git a/scan.c b/scan.c
index b15df040..d2e8f9fe 100644
--- a/scan.c
+++ b/scan.c
@@ -454,6 +454,7 @@ void state_scan(struct snapraid_state* state, int output)
 	unsigned diskmax = tommy_array_size(&state->diskarr);
 	unsigned i;
 	struct snapraid_scan* scan;
+	int has_empty;
 
 	scan = malloc_nofail(diskmax * sizeof(struct snapraid_scan));
 	for(i=0;i<diskmax;++i) {
@@ -567,16 +568,28 @@ void state_scan(struct snapraid_state* state, int output)
 			/* insert it */
 			scan_link_insert(state, disk, link);
 		}
+	}
+
+	/* checks for disks where all the previously existing files where removed */
+	has_empty = 0;
+	for(i=0;i<diskmax;++i) {
+		struct snapraid_disk* disk = tommy_array_get(&state->diskarr, i);
 
-		/* if all the previous file were removed */
 		if (scan[i].count_equal == 0 && scan[i].count_moved == 0 && scan[i].count_remove != 0) {
-			if (!state->force_empty) {
-				fprintf(stderr, "All the files previously present in disk '%s' at dir '%s' are now missing or overwritten!\n", disk->name, disk->dir);
-				fprintf(stderr, "If you really want to sync, use 'snapraid --force-empty sync'\n");
-				exit(EXIT_FAILURE);
+			if (!has_empty) {
+				has_empty = 1;
+				fprintf(stderr, "All the files previously present in disk '%s' at dir '%s'", disk->name, disk->dir);
+			} else {
+				fprintf(stderr, ", disk '%s' at dir '%s'", disk->name, disk->dir);
 			}
 		}
 	}
+	if (has_empty) {
+		fprintf(stderr, " are now missing or rewritten!\n");
+		fprintf(stderr, "This happens with an empty disk or when all the files are recreated after a 'fix' command.\n");
+		fprintf(stderr, "If you really want to sync, use 'snapraid --force-empty sync'.\n");
+		exit(EXIT_FAILURE);
+	}
 
 	if (state->verbose || output) {
 		struct snapraid_scan total;