emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
From: Eli Zaretskii <eliz@gnu.org>
To: Maxim Nikulin <manikulin@gmail.com>
Cc: 12972@debbugs.gnu.org
Subject: bug#12972: [PATCH] Avoid regression in mailcap-view-file similar to Bug#44824
Date: Thu, 01 Jul 2021 21:38:15 +0300	[thread overview]
Message-ID: <835yxtlw14.fsf@gnu.org> (raw)
In-Reply-To: <cdb70599-1082-fd9b-0927-ec811d3a6ee8@gmail.com> (message from Maxim Nikulin on Fri, 2 Jul 2021 00:01:59 +0700)

> From: Maxim Nikulin <manikulin@gmail.com>
> Date: Fri, 2 Jul 2021 00:01:59 +0700
> 
> --- a/lisp/net/mailcap.el
> +++ b/lisp/net/mailcap.el
> @@ -1177,7 +1177,23 @@ See \"~/.mailcap\", `mailcap-mime-data' and related files and variables."
>  		   (shell-quote-argument (convert-standard-filename file))
>  		   command
>  		   nil t))
> -    (start-process-shell-command command nil command)))
> +    ;; Handlers such as "gio open" and kde-open5 start viewer in background
> +    ;; and exit immediately.  Avoid `start-process' since it assumes
> +    ;; :connection-type 'pty and kills children processes with SIGHUP
> +    ;; when temporary terminal session is finished (Bug#44824).
> +    ;; An alternative is `process-connection-type' let-bound to nil for
> +    ;; `start-process-shell-command' call (with no chance to report failure).
> +    (make-process
> +     :name "mailcap-view-file" :connection-type 'pipe :noquery t
> +     :buffer nil ; "*Messages*" may be suitable for debugging
> +     :sentinel (lambda (proc event)
> +                 (when (and (memq (process-status proc) '(exit signal))
> +                            (/= (process-exit-status proc) 0))
> +                   (message
> +                    "Command %s: %s."
> +                    (mapconcat #'identity (process-command proc) " ")
> +                    (substring event 0 -1))))
> +     :command (list shell-file-name shell-command-switch command))))

I have two issues with this change:

First, you replace start-process-shell-command with make-process, and
I'm not sure I understand why.  If all you want is to use pipes, why
not simply bind process-connection-type around the call to
start-process-shell-command?  Does it not work for some reason?

And second, I'm not sure we should make this change unconditionally.
It isn't guaranteed that the handler will be one of those which have
the problem, is it?  And with other handlers, this could be an
incompatible behavior change if the handler behaves differently when
its standard handles are connected to a pipe rather than a terminal
device.  So I'd rather make this a conditional change, ideally only
when one of the affected handlers is used (assuming we can detect that
somehow).

Thanks.




  reply	other threads:[~2021-07-01 18:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <F3C1A7E58B2441F7A674239043AC031A@us.oracle.com>
2021-06-01  6:56 ` bug#12972: 24.3.50; Move `org-open-file' and associated code out of Org mode Lars Ingebrigtsen
     [not found] ` <87r1hmdqek.fsf__16088.3597027109$1622530682$gmane$org@gnus.org>
2021-06-02 16:20   ` Maxim Nikulin
2021-07-01 17:01   ` bug#12972: [PATCH] Avoid regression in mailcap-view-file similar to Bug#44824 Maxim Nikulin
2021-07-01 18:38     ` Eli Zaretskii [this message]
     [not found]     ` <835yxtlw14.fsf__2546.8955327355$1625164803$gmane$org@gnu.org>
2021-07-02 12:21       ` Maxim Nikulin
2021-07-02 12:37         ` Eli Zaretskii
     [not found]         ` <837di8ki24.fsf__46278.4886871063$1625229533$gmane$org@gnu.org>
2021-07-02 16:24           ` Maxim Nikulin
2021-07-02 17:28             ` Eli Zaretskii
     [not found]             ` <831r8gk4m0.fsf__14172.0669272885$1625246977$gmane$org@gnu.org>
2021-07-03 11:29               ` Maxim Nikulin
2021-07-03 11:56                 ` Eli Zaretskii
     [not found]                 ` <83im1ripaz.fsf__31901.4239286602$1625313464$gmane$org@gnu.org>
2021-07-04 13:37                   ` Maxim Nikulin
2021-07-04 13:49                     ` Eli Zaretskii
2021-07-05 13:12                       ` Maxim Nikulin
2021-07-05 15:23                         ` Eli Zaretskii
2021-07-30 12:01     ` bug#12972: 24.3.50; Move `org-open-file' and associated code out of Org mode Lars Ingebrigtsen
2021-07-30 12:24       ` Maxim Nikulin
2021-07-30 12:42         ` Lars Ingebrigtsen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.orgmode.org/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=835yxtlw14.fsf@gnu.org \
    --to=eliz@gnu.org \
    --cc=12972@debbugs.gnu.org \
    --cc=manikulin@gmail.com \
    --subject='Re: bug#12972: [PATCH] Avoid regression in mailcap-view-file similar to Bug#44824' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Code repositories for project(s) associated with this inbox:

	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).