How to change the terminal title to currently running process?-CodePudding

I know how to change the Terminal Window title. What I am trying to find out is how to make bash not zsh write out the currently running process so if I say do

$ ls -lF

I would get something like this for the title

/home/me/curerntFolder (ls -lF)

Getting the last executed command would be too late since the command has executed already, so it won't set the title with the command that was executed.

CodePudding user response：

UPDATE: my previous answer (below) displays the previous command in the title bar.

Ignoring everything from my previous answer and starting from scratch:

trap 'echo -ne "\033]0;${PWD}: (${BASH_COMMAND})\007"' DEBUG

Running the following at the command prompt:

$ sleep 10

The window title bar changes to /my/current/directory: (sleep 10) while the sleep 10 is running.

Running either of these:

$ sleep 1; sleep 2; sleep 3
$ { sleep 1; sleep2; sleep 3; }

The title bar changes as each sleep command is invoked.

Running this:

$ ( sleep 1; sleep 2; sleep 3 )

The title bar does not change (the trap does not apply within a subprocess call).

One last one:

$ echo $(sleep 3; echo abc)

The title bar displays (echo $sleep 3; echo abc)).

previous answer

Adding to this answer:

store_command() {
  declare -g last_command current_command
  last_command=$current_command
  current_command=$BASH_COMMAND
  return 0
}
trap store_command DEBUG

PROMPT_COMMAND='echo -ne "\033]0;${PWD}: (${last_command})\007"'

Additional reading materials re: trap / DEBUG:

CodePudding user response：

You can combine setting the window title with setting the prompt.

Here's an example using bashs PROMPT_COMMAND:

tputps () {
    echo -n '\['
    tput "$@"
    echo -n '\]'
}

prompt_builder () {
    # Window title - operating system command (OSC) ESC   ]
    echo -ne '\033]0;'"${USER}@${HOSTNAME}:$(dirs)"'\a' >&2

    # username, green
    tputps setaf 2
    echo -n '\u'

    # directory, orange
    tputps setaf 208
    echo -n ' \w'
    tputps sgr0 0
}

prompt_cmd () {
    PS1="$(prompt_builder) \$ "
}

export PROMPT_COMMAND=prompt_cmd