bug#12871: 24.3.50; error: The directory `/tmp/emacs1000' is unsafe

bug#12871: 24.3.50; error: The directory `/tmp/emacs1000' is unsafe

[Tassilo Horn]

When I start up emacs and do M-x server-start, I get the above error.
The mentioned directory must not exists already with mode 700.  (For me,
/tmp is wiped out during boot, so this is always true after I rebooted).

Steps to reproduce:

  1. emacs -Q
  2. M-x server-start RET

Now the error occurs.  The directory has been created with the wrong
permissions:

--8<---------------cut here---------------start------------->8---
% ll /tmp 
total 40
[...]
drwx------ 2 horn horn     60 Nov 12 17:08 emacs1000
--8<---------------cut here---------------end--------------->8---

As a workaround, I can fix the permissions (chmod 700 /tmp/emacs1000)
and restart the server.

Checking the code, `server-ensure-safe-dir' just calls

  (cl-letf (((default-file-modes) ?\700)) (make-directory dir t))

When I evaluate

  (cl-letf (((default-file-modes) ?\700)) (make-directory "~/foobar"))

it creates the foobar directory, but the permissions are drwxr-xr-x.

This problem is there since I updated my emacs checkout today.  Before,
I used the version I updated last Friday, and that one works fine.


In GNU Emacs 24.3.50.1 (x86_64-pc-linux-gnu, GTK+ Version 3.4.4)
 of 2012-11-12 on thinkpad
Bzr revision: vincentb1@users.sourceforge.net-20121112055353-v0t5ytiafc4327c8
Windowing system distributor `The X.Org Foundation', version 11.0.11300000
System Description:	NAME=Gentoo

Configured using:
 `configure '--prefix=/usr' '--build=x86_64-pc-linux-gnu'
 '--host=x86_64-pc-linux-gnu' '--mandir=/usr/share/man'
 '--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc'
 '--localstatedir=/var/lib' '--libdir=/usr/lib64'
 '--disable-dependency-tracking' '--program-suffix=-emacs-24-vcs'
 '--program-transform-name=s/emacs-[0-9].*/emacs-24-vcs/'
 '--infodir=/usr/share/info/emacs-24-vcs'
 '--enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp'
 '--with-crt-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.3/../../../../lib64'
 '--with-gameuser=games' '--without-compress-info' '--without-hesiod'
 '--without-kerberos' '--without-kerberos5' '--with-gpm' '--with-dbus'
 '--with-gnutls' '--with-xml2' '--without-selinux' '--without-wide-int'
 '--with-sound' '--with-x' '--without-ns' '--without-gconf'
 '--with-gsettings' '--with-toolkit-scroll-bars' '--with-gif'
 '--with-jpeg' '--with-png' '--with-rsvg' '--with-tiff' '--with-xpm'
 '--with-imagemagick' '--with-xft' '--with-libotf' '--with-m17n-flt'
 '--with-x-toolkit=gtk3'
 'GENTOO_PACKAGE=app-editors/emacs-vcs-24.3.9999' 'EBZR_BRANCH=trunk'
 'EBZR_REVNO=110872' 'build_alias=x86_64-pc-linux-gnu'
 'host_alias=x86_64-pc-linux-gnu' 'CFLAGS=-march=native -pipe -g3 -ggdb'
 'LDFLAGS=-Wl,-O1 -Wl,--as-needed' 'CPPFLAGS=''

Important settings:
  value of $LC_COLLATE: C
  value of $LC_MONETARY: de_DE.utf8
  value of $LC_NUMERIC: de_DE.utf8
  value of $LC_TIME: de_DE.utf8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: C/l

Minor modes in effect:
  shell-dirtrack-mode: t
  helm-match-plugin-mode: t
  global-edit-server-edit-mode: t
  outline-minor-mode: t
  recentf-mode: t
  global-subword-mode: t
  subword-mode: t
  savehist-mode: t
  show-paren-mode: t
  minibuffer-depth-indicate-mode: t
  window-number-meta-mode: t
  global-yascroll-bar-mode: t
  yascroll-bar-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
<tab> - i n <tab> <return> M-2 <tab> <return> C-x k 
<return> C-x C-f s r <tab> f i l <tab> M-x v c - a 
n n <tab> <return> <escape> <escape> <escape> C-s m 
a k e - d i r <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <left> C-a 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> M-x r g r <tab> <return> 
d e f a u l t - f i M-/ <return> * . c <return> <return> 
C-h v C-g C-h f i <backspace> f i l <tab> - <backspace> 
<backspace> <backspace> i n d - f i <tab> <tab> - h 
a n d <tab> <tab> <tab> <return> M-1 <tab> M-2 <tab> 
<tab> <return> q q q M-x r e p o <tab> r t <tab> <
return>

Recent messages:
Mark saved where search started
Grep finished (matches found)
Quit
Making completion list... [2 times]
Type "q" in help window to restore its previous buffer.
indent-relative: Buffer is read-only: #<buffer *Annotate fileio.c (rev 110872)*>
mouse-2, RET: find function's definition
mouse-2, RET: describe this variable

Making completion list...

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Features:
(shadow sort mail-extr gnus-msg emacsbug sendmail pp find-dired
hippie-exp misearch multi-isearch vc-annotate cc-langs cc-mode cc-fonts
cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs
vc-bzr vc-sccs vc-svn vc-cvs vc-rcs vc-dir ewoc vc vc-dispatcher
helm-misc helm-files image-dired tramp tramp-compat tramp-loaddefs shell
dired-aux ffap helm-tags helm-bookmark helm-adaptative helm-info
helm-net browse-url helm-plugin helm-locate helm-help helm-match-plugin
helm-external eldoc go-mode-load greql-mode tg-mode generic
preview-latex tex-site auto-loads paredit epa-file epa google-translate
ido rdictcc appt vc-git hl-line org-mobile org-capture org-mks org-irc
org-info org-gnus org-docview org-bibtex bibtex org-protocol org-attach
org-id org-icalendar org-exp ob-exp org-habit calfw-ical icalendar
calfw-org org-agenda calfw holidays hol-loaddefs diary-lib
diary-loaddefs org ob-tangle ob-ref ob-lob ob-table org-footnote org-src
ob-comint ob-keys org-pcomplete pcomplete org-list org-faces
org-entities org-version ob-emacs-lisp ob org-compat org-macs ob-eval
org-loaddefs find-func cal-menu calendar cal-loaddefs
google-contacts-message google-contacts-gnus gnus-art mm-uu mml2015
mm-view mml-smime smime dig gnus-sum nnoo gnus-group gnus-undo nnmail
mail-source gnus-start gnus-spec gnus-int gnus-range gnus-win gnus
gnus-ems gnus-compat nnheader google-contacts xml oauth2 json plstore
epg epg-config url-cache url url-proxy url-privacy url-expand
url-methods url-history url-cookie url-domsuf mailcap url-util url-parse
auth-source gnus-util password-cache url-vars google-oauth dired-x
highlight-symbol hi-lock thingatpt boxquote rect ecomplete message idna
format-spec rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse
rfc2231 rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mailabbrev
mail-utils gmm-utils mailheader info edit-server server yasnippet
dropdown-list derived assoc help-mode disp-table noutline outline
browse-kill-ring recentf tree-widget wid-edit helm-buffers helm-grep
helm-regexp grep helm-elscreen helm-utils compile comint ansi-color ring
helm helm-config easymenu uniquify easy-mmode iedit help-macro iedit-lib
cl-macs gv subword saveplace savehist highlight-parentheses paren
lusty-explorer dired mb-depth warnings advice help-fns advice-preload rx
window-number cl cl-lib yascroll edmacro kmacro gnus-load
adaptive-wrap-autoloads boxquote-autoloads browse-kill-ring-autoloads
clojure-mode-autoloads debbugs-autoloads full-ack-autoloads
gist-autoloads gh-autoloads eieio byte-opt bytecomp byte-compile cconv
git-commit-autoloads graphviz-dot-mode-autoloads
highlight-parentheses-autoloads highlight-symbol-autoloads
logito-autoloads markdown-mode-autoloads oauth2-autoloads
paredit-autoloads pastebin-autoloads pcache-autoloads finder-inf
window-number-autoloads yascroll-autoloads package site-gentoo time-date
tooltip 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
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 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
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty emacs)

bug#12871: 24.3.50; error: The directory `/tmp/emacs1000' is unsafe

[Glenn Morris]

This issue is present in emacs-24 as well.

bug#12871: 24.3.50; error: The directory `/tmp/emacs1000' is unsafe

[Glenn Morris]

Glenn Morris wrote:

> This issue is present in emacs-24 as well.

Seems gv-define-simple-setter still isn't working right with fix-return.
Now it returns the correct value, but does not actually set anything.
Eg (setf (buffer-name) "qux") does not rename the buffer.

bug#12871: 24.3.50; error: The directory `/tmp/emacs1000' is unsafe

[Andreas Schwab]

Tassilo Horn <tsdh@gnu.org> writes:

>   (cl-letf (((default-file-modes) ?\700)) (make-directory dir t))

default-file-modes is not a variable, it is a function.  You need to
call set-default-file-modes to change the umask.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

bug#12871: 24.3.50; error: The directory `/tmp/emacs1000' is unsafe

[Stefan Monnier]

> Eg (setf (buffer-name) "qux") does not rename the buffer.

I think it's a bit more fixed now.


        Stefan

bug#12871: 24.3.50; error: The directory `/tmp/emacs1000' is unsafe

[Glenn Morris]

Stefan Monnier wrote:

>> Eg (setf (buffer-name) "qux") does not rename the buffer.
>
> I think it's a bit more fixed now.

Works for me.

PS `(,(`(`((,',)))))

bug#12871: 24.3.50; error: The directory `/tmp/emacs1000' is unsafe

[Stefan Monnier]

> PS `(,(`(`((,',)))))

Yes, I dislike nested backquotes, but for some reason after writing the
"single-level" backquote version of the code, I ended up finding it even
more confusing than the nested-backquote version.

I do not remember this happening to me until now, so either something
makes this case different, or I'm becoming more tolerant of
nested backquotes.


        Stefan

bug#12871: 24.3.50; error: The directory `/tmp/emacs1000' is unsafe

[Tassilo Horn]

Andreas Schwab <schwab@linux-m68k.org> writes:

>>   (cl-letf (((default-file-modes) ?\700)) (make-directory dir t))
>
> default-file-modes is not a variable, it is a function.  You need to
> call set-default-file-modes to change the umask.

Rest assured the code is correct because (default-file-modes) returns a
setf-able place (see (info "(cl)Setf Extensions")).

Bye,
Tassilo