Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Q&A

Post History

66%
+2 −0
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 8mo ago by r~~‭  ·  edited 7mo ago by r~~‭

Answer
#2: Post edited by user avatar r~~‭ · 2023-10-03T21:06:08Z (7 months 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 `$(tput cols)`.
#1: Initial revision by user avatar r~~‭ · 2023-10-02T18:52:27Z (8 months ago)
You could use the `$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/"
```