mirror of
https://github.com/eth-p/bat-extras.git
synced 2024-11-07 16:24:06 +01:00
68 lines
2.1 KiB
Bash
68 lines
2.1 KiB
Bash
#!/usr/bin/env bash
|
|
# -----------------------------------------------------------------------------
|
|
# bat-extras | Copyright (C) 2021 eth-p | MIT License
|
|
#
|
|
# Repository: https://github.com/eth-p/bat-extras
|
|
# Issues: https://github.com/eth-p/bat-extras/issues
|
|
# -----------------------------------------------------------------------------
|
|
|
|
# Gets the path to the parent executable file.
|
|
# Arguments:
|
|
# 1 -- The target pid. If not provided, the script's parent is used.
|
|
parent_executable() {
|
|
local target_pid="${1:-$PPID}"
|
|
ps -f -p "$target_pid" | tail -n 1 | awk '{for(i=8;i<=NF;i++) printf $i" "; printf "\n"}'
|
|
}
|
|
|
|
# Gets the PID of the parent executable file.
|
|
# Arguments:
|
|
# 1 -- The target pid. If not provided, the script's parent is used.
|
|
parent_executable_pid() {
|
|
local target_pid="${1:-$PPID}"
|
|
ps -f -p "$target_pid" | tail -n 1 | awk '{print $3}'
|
|
}
|
|
|
|
# Gets the path to the parent login shell.
|
|
# Arguments:
|
|
# 1 -- The target pid. If not provided, the script's parent is used.
|
|
parent_shell() {
|
|
local target_pid="${1:-$PPID}"
|
|
local target_name
|
|
while true; do
|
|
{
|
|
read -r target_pid
|
|
read -r target_name
|
|
|
|
# If the parent process starts with a "-", it's a login shell.
|
|
if [[ "${target_name:0:1}" = "-" ]]; then
|
|
target_name="$(cut -f1 -d' ' <<< "${target_name:1}")"
|
|
break
|
|
fi
|
|
|
|
# If the parent process has "*sh " followed by "-l", it's probably a login shell.
|
|
if [[ "$target_name" =~ sh\ .*-l ]]; then
|
|
target_name="$(cut -f1 -d' ' <<< "${target_name}")"
|
|
break
|
|
fi
|
|
|
|
# If the parent process is pid 0 (init), then we haven't found a parent shell.
|
|
# At this point, it's best to assume the shell is whatever is defined in $SHELL.
|
|
if [[ "$target_pid" -eq 0 ]]; then
|
|
target_name="$SHELL"
|
|
break
|
|
fi
|
|
} < <({
|
|
ps -f -p "$target_pid" \
|
|
| tail -n 1 \
|
|
| awk '{print $3; for(i=8;i<=NF;i++) printf $i" "; printf "\n"}'
|
|
})
|
|
done
|
|
|
|
# Ensure that the detected shell is an executable path.
|
|
if [[ -f "$target_name" ]]; then
|
|
echo "$target_name"
|
|
elif ! command -v "$target_name" 2>/dev/null; then
|
|
echo "$target_name" # It's not, but we have nothing else we can do here.
|
|
fi
|
|
}
|