mirror of
https://github.com/eth-p/bat-extras.git
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68 lines
2.1 KiB
Bash
68 lines
2.1 KiB
Bash
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#!/usr/bin/env bash
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# -----------------------------------------------------------------------------
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# bat-extras | Copyright (C) 2021 eth-p | MIT License
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#
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# Repository: https://github.com/eth-p/bat-extras
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# Issues: https://github.com/eth-p/bat-extras/issues
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# -----------------------------------------------------------------------------
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# Gets the path to the parent executable file.
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# Arguments:
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# 1 -- The target pid. If not provided, the script's parent is used.
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parent_executable() {
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local target_pid="${1:-$PPID}"
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ps -f -p "$target_pid" | tail -n 1 | awk '{for(i=8;i<=NF;i++) printf $i" "; printf "\n"}'
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}
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# Gets the PID of the parent executable file.
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# Arguments:
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# 1 -- The target pid. If not provided, the script's parent is used.
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parent_executable_pid() {
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local target_pid="${1:-$PPID}"
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ps -f -p "$target_pid" | tail -n 1 | awk '{print $3}'
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}
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# Gets the path to the parent login shell.
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# Arguments:
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# 1 -- The target pid. If not provided, the script's parent is used.
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parent_shell() {
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local target_pid="${1:-$PPID}"
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local target_name
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while true; do
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{
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read -r target_pid
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read -r target_name
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# If the parent process starts with a "-", it's a login shell.
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if [[ "${target_name:0:1}" = "-" ]]; then
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target_name="$(cut -f1 -d' ' <<< "${target_name:1}")"
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break
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fi
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# If the parent process has "*sh " followed by "-l", it's probably a login shell.
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if [[ "$target_name" =~ sh\ .*-l ]]; then
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target_name="$(cut -f1 -d' ' <<< "${target_name}")"
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break
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fi
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# If the parent process is pid 0 (init), then we haven't found a parent shell.
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# At this point, it's best to assume the shell is whatever is defined in $SHELL.
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if [[ "$target_pid" -eq 0 ]]; then
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target_name="$SHELL"
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break
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fi
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} < <({
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ps -f -p "$target_pid" \
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| tail -n 1 \
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| awk '{print $3; for(i=8;i<=NF;i++) printf $i" "; printf "\n"}'
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})
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done
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# Ensure that the detected shell is an executable path.
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if [[ -f "$target_name" ]]; then
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echo "$target_name"
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elif ! command -v "$target_name" 2>/dev/null; then
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echo "$target_name" # It's not, but we have nothing else we can do here.
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fi
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}
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