Bash Scripting - Error Handling
You want to ensure temporary files are deleted when your script exits, even if interrupted. Which trap setup is best?
You want to ensure temporary files are deleted when your script exits, even if interrupted. Which trap setup is best?
hard🚀 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify signals to trap for cleanup
EXIT runs on normal exit, SIGINT and SIGTERM cover interrupts and termination.Step 2: Choose trap covering all exit cases
trap 'rm -f /tmp/mytempfile' EXIT SIGINT SIGTERM traps EXIT, SIGINT, and SIGTERM to delete temp file in all cases.Final Answer:
trap 'rm -f /tmp/mytempfile' EXIT SIGINT SIGTERM -> Option AQuick Check:
Trap multiple signals to ensure cleanup on exit and interrupts [OK]
Quick Trick: Trap EXIT, SIGINT, SIGTERM for reliable cleanup [OK]
Common Mistakes:
MISTAKES- Trying to trap SIGKILL or SIGSTOP which cannot be trapped
- Only trapping EXIT misses interrupts
- Not quoting commands in trap
Master "Error Handling" in Bash Scripting
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