Try and stop binslice crashing.

davidgiven · Dec 12, 2023 · 80c6523 · 80c6523
1 parent 78f7e51
commit 80c6523
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diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
@@ -28,7 +28,7 @@ jobs:
         make -C ack PREFIX=$HOME +ack-cpm
         make -C ack PREFIX=$HOME install
     - name: make
-      run: PATH=$PATH:$HOME/bin make verbose all
+      run: PATH=$PATH:$HOME/bin make
 
     - name: date
       run: |

diff --git a/build/cpm.bzl b/build/cpm.bzl
@@ -95,14 +95,14 @@ def binslice(name, src, start, length=None):
             name = name,
             srcs = [ src ],
             outs = [ name + ".img" ],
-            cmd = "tail -c+%d $< > $@" % (start)
+            cmd = "dd status=none if=$< of=$@ bs=1 skip=%d" % (start)
         )
     else:
         native.genrule(
             name = name,
             srcs = [ src ],
             outs = [ name + ".img" ],
-            cmd = "tail -c+%d $< | head -c%d > $@" % (start, length)
+            cmd = "dd status=none if=$< of=$@ bs=1 skip=%d count=%d" % (start, length)
         )
 
 def diskimage(name, format, bootfile, map):