[Solved] How does set -o pipefail interact with command substitution in bash?Consider:set -o pipefail output=$(false | true) | Bash Scripting

Bash Scripting - Error Handling

How does set -o pipefail interact with command substitution in bash?
Consider:

set -o pipefail
output=$(false | true)

AThe command substitution returns exit status 0 regardless of pipefail.

BThe command substitution returns the exit status of the first failed command due to pipefail.

CPipefail has no effect inside command substitution.

DThe script will error out immediately.

Step-by-Step Solution

Solution:

Step 1: Understand command substitution exit status
Command substitution returns the exit status of the entire pipeline inside it.
Step 2: Effect of pipefail inside command substitution
With pipefail enabled, the substitution returns the exit status of the rightmost failed command in the pipeline.
Final Answer:
The command substitution returns the exit status of the first failed command due to pipefail. -> Option B
Quick Check:
Pipefail affects command substitution exit status [OK]

Quick Trick: Pipefail affects exit status inside command substitution [OK]

Common Mistakes:

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