rdsquashfs: improve unpacking error message on Windows

Print a proper error description instead of just an error code.

If the error is ERROR_FILE_EXISTS, print out a hint that this might
be caused by a case in-sensitivity issue.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 10 insertions, 2 deletions

diff --git a/bin/rdsquashfs/restore_fstree.c b/bin/rdsquashfs/restore_fstree.c
index b9f92fe..ea9d4f1 100644
--- a/bin/rdsquashfs/restore_fstree.c
+++ b/bin/rdsquashfs/restore_fstree.c
@@ -40,11 +40,19 @@ static int create_node(const sqfs_tree_node_t *n, const char *name, int flags)
 
 	free(wpath);
 	return 0;
-fail:
-	fprintf(stderr, "Creating %s: %ld\n", name, GetLastError());
+fail: {
+	DWORD err = GetLastError();
 	free(wpath);
+	SetLastError(err);
+	w32_perror(name);
+
+	if (err == ERROR_FILE_EXISTS) {
+		fputs("\nHINT: this could be caused by case "
+		      "sensitivity on Windows.\n", stderr);
+	}
 	return -1;
 }
+}
 #else
 static int create_node(const sqfs_tree_node_t *n, const char *name, int flags)
 {