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73 sats \ 2 replies \ @justsmile 19 May 2022 \ on: Looking for pre-2019 stale-block data for a to-be-public dataset: hashes and headers (you can help!) bitcoin
Nice script!
It is enough to do a much-more compatible #!/bin/sh since you are not using any Bash-specific features in the script. Also you can use jq -c '.[] | select (.status != "active")' for brevity.
The full smaller (maybe not simpler, but your mileage may vary) script which does the same in significantly shorter time is:
#!/bin/sh
#
# A script to extract stale blocks (height, hash, header) from a
# Bitcoin Core node. Output is in CSV format.
# This assumes .cookie-file authentication to the Bitcoin Core node.

bitcoin-cli getchaintips \
  | jq -rc '.[] | select (.status != "active")
                | ( (.height | tostring) + " " + .hash )' \
  | while read height bhash;
    do
      echo "$height,$bhash,$(bitcoin-cli getblockheader $bhash false)"
    done
Comparison of both:
$ time sh script.sh | sha256sum
real	0m 4.98s
user	0m 4.60s
sys	0m 0.25s
678d9d530cd9cb8d41a45fbb210084dd5601b04a2313bae8d1f564b7eb1f203f  -
$ time sh script-small.sh | sha256sum
real	0m 0.35s
user	0m 0.30s
sys	0m 0.04s
678d9d530cd9cb8d41a45fbb210084dd5601b04a2313bae8d1f564b7eb1f203f  -
The output of my bitcoin-cli getchaintips is shorter than yours.
@k00b please note the copy&paste of preformatted text blocks (whose line-numbers indentation was fixed recently, thanks!) gives line-numbers:
#!/bin/bash
2
3# A script to extract stale blocks (height, hash, header) from a
4# Bitcoin Core node. Output is in CSV format.
5# This assumes .cookie-file authentication to the Bitcoin Core node.
write
preview
10 sats \ 1 reply \ @0xB10C OP 19 May 2022 freebie
Oh, neat. Thanks! Will adopt the script if you don't mind.
Note: There's also the invalid status in getchaintips when you've used invalidateblock.