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The `wait` builtin is defined by POSIX to wait for terminated background jobs and return their exit status. However, the value reported when a job ends because it was killed by a signal is not uniform; some shells return 128+signal while others return the signal number itself. Which exit code does each POSIX‑compliant shell return for a job killed with SIGTE
Goal Diagnose a failed deployment by inspecting application logs with a Bash script that uses grep and head pipelines. Constraints The script runs with set -e and set -o pipefail to abort on errors, but grep returns 1 when no lines match, 2 on file errors, and 141 when terminated by SIGPIPE from head . These statuses are not automatically distinguishable by
unix
bash