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  1. #!/bin/bash
  2. s='++  *+   ++ + [SPAM] foo(): z.y.o ## [x.y.z]----- '
  3. grep -o '\[[^][]*]' <<< "$s"
  4. echo "---"
  5. sed -n 's/^[^[]*\(\[[^][]*]\).*/\1/p' <<< "$s"
Success #stdin #stdout 0.01s 5380KB
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stdin
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Standard input is empty
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[SPAM]
[x.y.z]
---
[SPAM]
https://ideone.com/Tlj1ck
language:
Bash (bash 5.0.3)
created:
3 years ago
visibility:
public

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