bug#16519: 24.3.50; gfile notifications not received in batch mode

[Michael Albinus]

File notifications via gfilenotify are not received in batch
mode. Likely, the following actions must be taken (quoting Jan Djärv):

  So just switching to xg_select will not do.  You have to explicitly
  check if in batch mode, then check if GLib has file descriptors we
  don't know about, and then call xg_select in the main thread.


In GNU Emacs 24.3.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.20)
 of 2014-01-22 on detlef
Repository revision: 116098 rgm@gnu.org-20140121172119-4nxwdo2ap2o74d4c
System Description:     Ubuntu 13.10

Configured using:
 `configure --with-file-notification=inotify'

Important settings:
  value of $LC_MONETARY: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gnus-undo-mode: t
  display-time-mode: t
  shell-dirtrack-mode: t
  iswitchb-mode: t
  icomplete-mode: t
  show-paren-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
ESC [ > 1 ; 3 2 0 1 ; 0 c ESC O Q ESC x r e p o r t 
TAB RET

Recent messages:
Reading active file via nnml...
Reading incoming mail from pop...
pop3 retrieved 0KB (0%) [7 times]
pop3 retrieved 4KB (100%) [5 times]
compressing 14147.gz...done
Wrote /home/albinus/Mail/default/14147.gz
nnml: Reading incoming mail (1 new)...done
Reading active file via nnml...done
Reading active file via nndraft...done
Checking new news...done

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Features:
(shadow sort mail-extr warnings emacsbug pop3 utf-7 nndraft nnmh nnimap
parse-time utf7 nnml netrc gnutls network-stream starttls tls gnus-agent
gnus-srvr gnus-score score-mode nnvirtual gnus-msg gnus-art mm-uu
mml2015 epg-config mm-view mml-smime smime dig mailcap gnus-cache
gnus-sum nnnil smtpmail sendmail gnus-demon nntp gnus-group gnus-undo
nnmail mail-source nnoo gnus-start gnus-spec gnus-int gnus-range message
rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
rfc2047 rfc2045 ietf-drums mailabbrev gmm-utils mailheader gnus-win gnus
gnus-ems nnheader mail-utils wid-edit xterm cperl-mode debbugs-autoloads
info easymenu magit-autoloads zeitgeist-autoloads package time tramp
tramp-compat auth-source eieio byte-opt bytecomp byte-compile cconv
eieio-core gnus-util mm-util mail-prsvr password-cache tramp-loaddefs
cl-macs gv trampver shell pcomplete comint ansi-color ring format-spec
advice help-fns cl cl-loaddefs cl-lib autorevert filenotify iswitchb
jka-compr icomplete time-date paren ps-print ps-def lpr vc vc-dispatcher
dired tooltip electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel x-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list newcomment lisp-mode prog-mode register page menu-bar
rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax
facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak
czech european ethiopic indian cyrillic chinese case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button
faces cus-face macroexp files text-properties overlay sha1 md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process dbusbind inotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty emacs)