From 1325027567357d33ce392cc1c93ffb3acfdefbbb Mon Sep 17 00:00:00 2001
From: Thomas Lindner <tom@dl6tom.de>
Date: Sun, 12 Feb 2023 18:32:40 +0100
Subject: [PATCH] write empty indirect blocks when dumping to stdout

---
 dump_inode.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/dump_inode.c b/dump_inode.c
index ff49ebc..d195bfd 100644
--- a/dump_inode.c
+++ b/dump_inode.c
@@ -304,6 +304,12 @@ void dump_file_indirect(union dinode *dp, void *indirblock, int level,
           gapsize *= NINDIR(sblock);
         }
         *filesize -= gapsize;
+        if (filefd == STDOUT_FILENO) {
+          memset(datablock, 0, sblock->fs_bsize);
+          for (int j = 0; j < gapsize / sblock->fs_bsize; j++) {
+            xwrite(filefd, datablock, sblock->fs_bsize);
+          }
+        }
         continue;
       }
       daddr_t blkno = fsbtodb(sblock, fsblkno);
@@ -350,6 +356,12 @@ void dump_file(union dinode *dp) {
         gapsize *= NINDIR(sblock);
       }
       filesize -= gapsize;
+      if (filefd == STDOUT_FILENO) {
+        memset(datablock, 0, sblock->fs_bsize);
+        for (int j = 0; j < gapsize / sblock->fs_bsize; j++) {
+          xwrite(filefd, datablock, sblock->fs_bsize);
+        }
+      }
       continue;
     }
     daddr_t blkno = fsbtodb(sblock, DIP(dp, di_ib[i]));