bug#22814: 25.0.91; Emacs runs out of file descriptors on OS X

[Eli Zaretskii]

> From: Michael Albinus <michael.albinus@gmx.de>
> Cc: andlind@gmail.com,  22814@debbugs.gnu.org
> Date: Fri, 04 Mar 2016 08:53:24 +0100
> 
> > The only part that might be worth improving is the error message: it's
> > a far cry from what really went wrong.  If you can find a way of
> > making it say something about "too many open files", that'd be all the
> > improvement we can hope for.
> 
> I would apply the following patch:
> 
> --8<---------------cut here---------------start------------->8---
> *** 
> /home/albinus/src/emacs-25/src/doc.c.~2e78353fabe11c768627c50e48375de5693ce7ee~
> --- /home/albinus/src/emacs-25/src/doc.c
> ***************
> *** 126,131 ****
> --- 126,134 ----
>     fd = emacs_open (name, O_RDONLY, 0);
>     if (fd < 0)
>       {
> +       if ((errno == EMFILE) || (errno == ENFILE))
> +     report_file_error ("Read error on documentation file", file);
> + 
>   #ifndef CANNOT_DUMP
>         if (!NILP (Vpurify_flag))
>       {
> --8<---------------cut here---------------end--------------->8---
> 
> This ends up in the following error message:
> 
> Read error on documentation file: Too many open files, 
> /home/albinus/src/emacs-25/lisp/emacs-lisp/cl-seq.elc

LGTM.

> Is it OK to apply it to the emacs-25 branch, or shall it go to master?

Please commit to emacs-25, and thanks.