ps - process hierarchy

crg@crg.eti.br (Cesar Gimenes) — Sun, 11 Feb 2024 14:13:47 -0300

When I started using compterm, a problem soon appeared: sometimes I forgot that compterm was loaded. So I wrote a small function to detect whether I was in a session started by compterm or just a regular zsh session.

function is_parent_compterm {
 local pid=$$
 local parent_pid

 while [ "$pid" -ne 1 ]; do
 parent_pid=$(ps -p $pid -o ppid=)
 parent_pid=${parent_pid//[[:blank:]]/} # Remove espaços

 # Verifica se o nome do comando do processo pai é 'compterm'
 if ps -p $parent_pid -o comm= | grep -q "^compterm$"; then
 return 0 # Retorna true se encontrar 'compterm'
 fi

 pid=$parent_pid
 done

 return 1 # Retorna false se 'compterm' não for encontrado
}

This function walks through all the parent processes of the current process, and if any of them is named compterm, it returns true. With that I can customize the prompt and tell whether compterm is loaded or not.

Zsh on Cesar Gimenes

ps - process hierarchy