zsh 挂起程序

挂起

• 在 zsh 中，用户可以使用快捷键 Ctrl + z 挂起正在该终端中运行的前台任务。

查看后台任务

• 使用 jobs 查看当前 zsh 中被挂起的任务。

恢复

• 使用 fg %<job_id> 将挂起的任务重新恢复到前台。
• 若不加 %<job_id> 则会恢复最近挂起的任务。

后台恢复

• 使用 bg %<job_id> 将挂起的任务在后台恢复。
• 若不加 %<job_id> 则会恢复最近挂起的任务。

挂起后台任务

• 使用 kill -STOP %<job_id> 来挂起正在后台运行的任务。

使用相同快捷键恢复任务至前台

• 脚本来源： sheerun 中的 VII. Use Ctrl-Z to switch back to Vim

fancy-ctrl-z () {
  if [[ $#BUFFER -eq 0 ]]; then
    BUFFER="fg"
    zle accept-line
  else
    zle push-input
    zle clear-screen
  fi
}
zle -N fancy-ctrl-z
bindkey '^Z' fancy-ctrl-z

ChatGPT 对于该脚本的解释

This script defines a custom zsh widget (function) called fancy-ctrl-z and binds it to the Ctrl+Z key combination (^Z). It adds a bit of custom behavior to the default Ctrl+Z key binding, which is typically used to suspend the currently running foreground process.

Here’s a breakdown of the script and its purpose:

1. fancy-ctrl-z () { ... }: This defines a shell function named fancy-ctrl-z. The function is intended to modify the behavior of the Ctrl+Z key combination.

2. if [[ $#BUFFER -eq 0 ]]; then ... else ... fi: This conditional statement checks whether the current input buffer ($BUFFER) is empty or not. In the context of this script, the input buffer likely represents the currently typed command line.

   • If the input buffer is empty, it means the user pressed Ctrl+Z without typing any command. In this case, the function sets the input buffer to “fg” (which is a common shell command to bring the most recently suspended process back to the foreground), and then it accepts the line (executes the command) using zle accept-line. Essentially, it behaves like the default behavior of Ctrl+Z, but with the “fg” command pre-filled.
   • If the input buffer is not empty (i.e., there is a command already typed), the function performs a different action. It saves the current input (using zle push-input), clears the screen (using zle clear-screen), and effectively resets the command line. This is a custom behavior where pressing Ctrl+Z when a command is already typed will clear the command line without executing the command.

3. zle -N fancy-ctrl-z: This tells zsh to create a new widget named fancy-ctrl-z using the function defined earlier.

4. bindkey '^Z' fancy-ctrl-z: This binds the fancy-ctrl-z widget to the Ctrl+Z key combination. Whenever you press Ctrl+Z, the custom function’s behavior will be triggered.

In summary, this script customizes the behavior of Ctrl+Z in the zsh shell. If you press Ctrl+Z without typing a command, it behaves like the default Ctrl+Z by bringing the most recently suspended process back to the foreground. If you press Ctrl+Z with a command already typed, it clears the command line without executing the command. This can be useful for quickly clearing the command line when you change your mind about running a command or want to start typing a new one.

注意

需要排查快捷键冲突。
例如：bindkey -e