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I would like to check if my shell is running ssh or not by checking the process name. I tried to get the process name by:

(let* ((proc (get-process "shell")) (proc-child-id (process-running-child-p proc)))
  (if proc-child-id
     (message (process-name proc-child-id))))

But it doesn't work because process-name expect a PROCESS instead of PID. How can I get PROCESS from PID? Or how can I get the child process name directly?

  • 2
    Try to check if (alist-get 'comm (process-attributes PID)) returns ssh. BTW, the ssh process is created by shell, not Emacs, so it is not an Emacs subprocess so process-name etc doesn't make sense, I guess. See gnu.org/software/emacs/manual/html_node/elisp/… – xuchunyang Apr 3 '18 at 17:28
  • Somehow it always returns nil.. Thanks for your reply anyway~ – AhLeung Apr 4 '18 at 2:57
  • This is my guess: "In some environments, process-attributes is unimplimented and always returns nil." notmuchmail.org/pipermail/notmuch/2014/016796.html I'm using Emacs.app from emacsformacosx.com – AhLeung Apr 4 '18 at 3:15
  • 1
    If so, you can try ps -o comm= -p PID. process-attributes doesn't return nil from here, I am using latest Emacs (built from git repo last month) on Mac. – xuchunyang Apr 4 '18 at 4:15
  • 1
    shell-command returns exit status. shell-command-to-string returns the output. – xuchunyang Apr 4 '18 at 5:08

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