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Q&A How to overwrite each line of STDOUT with the next one?

In Bash, you could use the $COLUMNS environment variable to detect the width of your terminal and truncate each line to that length in your sed script. Something like this should work: sed "s/^\(....

posted 1y ago by r~~‭  ·  edited 1y ago by r~~‭

Answer
#2: Post edited by user avatar r~~‭ · 2023-10-03T21:06:08Z (about 1 year ago)
  • You could use the `$COLUMNS` environment variable to detect the width of your terminal and truncate each line to that length in your sed script. Something like this should work:
  • ```
  • sed "s/^\(.\{,$COLUMNS\}\).*$/\1/;2,\$s/^/\x1B[1A\x1B[K/"
  • ```
  • In Bash, you could use the `$COLUMNS` environment variable to detect the width of your terminal and truncate each line to that length in your sed script. Something like this should work:
  • ```
  • sed "s/^\(.\{,$COLUMNS\}\).*$/\1/;2,\$s/^/\x1B[1A\x1B[K/"
  • ```
  • For a sh-compatible alternative, replace `$COLUMNS` with `$(tput cols)`.
#1: Initial revision by user avatar r~~‭ · 2023-10-02T18:52:27Z (about 1 year ago)
You could use the `$COLUMNS` environment variable to detect the width of your terminal and truncate each line to that length in your sed script. Something like this should work:

```
sed "s/^\(.\{,$COLUMNS\}\).*$/\1/;2,\$s/^/\x1B[1A\x1B[K/"
```