From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Matthew Blissett Newsgroups: gmane.emacs.bugs Subject: bug#20595: 24.4; Data lost when modifying file on filesystem with no space left on device / disc full Date: Sun, 17 May 2015 11:52:47 +0000 Message-ID: <86h9rbxvxs.fsf@mi.blissett.me.uk> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1431885026 18261 80.91.229.3 (17 May 2015 17:50:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 17 May 2015 17:50:26 +0000 (UTC) To: 20595@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun May 17 19:50:14 2015 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Yu2hZ-0000Hc-RC for geb-bug-gnu-emacs@m.gmane.org; Sun, 17 May 2015 19:50:14 +0200 Original-Received: from localhost ([::1]:38111 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yu2hZ-0000qF-2j for geb-bug-gnu-emacs@m.gmane.org; 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X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Mailman-Approved-At: Sun, 17 May 2015 13:49:48 -0400 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:102908 Archived-At: I attempted to edit a file on the filesystem containing $HOME, with no space left (for non-root users). Filesystem 1B-blocks Used Available Use% Mounted on /dev/sdb1 105,559,908,352 104,591,810,560 0 100% /home When I saved the file (C-x C-s) Emacs gave the error "Write error: no space left on device, /home", so I quit (C-x C-c), pressed "n" to not save the file, and "yes" to exit with a modified buffer. I expected the original file to exist, but instead I have three zero-byte files: -rwx------ 1 matt users 0 2015-05-17 11:57 script~ -rwxr-xr-x 1 matt users 0 2015-05-17 11:57 script -rwxr-xr-x 1 matt users 0 2015-05-17 11:58 #script# Example steps to reproduce: dd if=/dev/zero of=small bs=1M count=10 mkfs.ext4 small sudo mount -o loop small /mnt sudo dd if=/dev/zero of=/mnt/85pc bs=1k count=8500 man man | sudo tee /mnt/man > /dev/null sudo mkdir /mnt/.emacs.d sudo chown -R $USER /mnt HOME=/mnt emacs /mnt/man (Edit the file, attempt to save, then exit discarding changes.) ls -lAr /mnt /mnt: total 8,718,336 -rw-r--r-- 1 matt root 8,704,000 2015-05-17 11:31 85pc drwxr-xr-x 2 matt root 1,024 2015-05-17 11:31 .emacs.d drwx------ 2 matt root 12,288 2015-05-17 11:31 lost+found -rw-r--r-- 1 matt root 0 2015-05-17 11:31 man -rw-r--r-- 1 matt users 0 2015-05-17 11:31 #man# -rw------- 1 matt users 0 2015-05-17 11:31 man~ /mnt/.emacs.d: total 0 -rw------- 1 matt users 0 2015-05-17 11:31 %backup%~ I'd expect /mnt/man to be unchanged, or at minimum one of /mnt/man~ or ~/.emacs.d/%backup%~ to contain the original file's contents. Cheers, Matt In GNU Emacs 24.4.1 (arm-unknown-linux-gnueabihf) of 2014-12-19 on henze, modified by Debian System Description: Debian GNU/Linux 8.0 (jessie) Configured using: `configure --build arm-linux-gnueabihf --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --with-pop=yes --enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.4/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.4/site-lisp:/usr/share/emacs/site-lisp --build arm-linux-gnueabihf --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --with-pop=yes --enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.4/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.4/site-lisp:/usr/share/emacs/site-lisp --with-x=no --without-gconf --without-gsettings 'CFLAGS=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wall' CPPFLAGS=-D_FORTIFY_SOURCE=2 LDFLAGS=-Wl,-z,relro' Important settings: value of $LANG: en_GB.UTF-8 locale-coding-system: utf-8-unix Major mode: Fundamental Minor modes in effect: tooltip-mode: t electric-indent-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 line-number-mode: t transient-mark-mode: t Recent input: ESC [ > 0 ; 1 1 5 ; 0 c C-x C-f DEL DEL / t m p / x DEL TAB TAB y RET C-x b RET RET C-x C-s C-x C-k RET n C-x k RET y e s RET ESC x r e p - e - b TAB RET Recent messages: Loading 00debian-vars...done Loading /etc/emacs/site-start.d/50puppet-el.el (source)...done For information about GNU Emacs and the GNU system, type C-h C-a. Making completion list... Saving file /mnt/man... Cannot write backup file; backing up in ~/.emacs.d/%backup%~ basic-save-buffer-2: Write error: no space left on device, /mnt/man No keyboard macro defined. Create one? (y or n) n Quit Load-path shadows: /usr/share/emacs/24.4/site-lisp/debian-startup hides /usr/share/emacs/site-lisp/debian-startup /usr/share/emacs/24.4/site-lisp/puppet-el/puppet-mode hides /usr/share/emacs/site-lisp/puppet-mode Features: (shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail regexp-opt rfc2047 rfc2045 ietf-drums mm-util help-fns mail-prsvr mail-utils edmacro cl-loaddefs cl-lib kmacro help-mode easymenu image xterm time-date tooltip electric uniquify ediff-hook vc-hooks lisp-float-type tabulated-list newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer select 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 gfilenotify multi-tty emacs) Memory information: ((conses 8 76608 7488) (symbols 24 17393 0) (miscs 20 35 135) (strings 16 10778 7177) (string-bytes 1 311082) (vectors 8 14096) (vector-slots 4 1145426 57182) (floats 8 65 408) (intervals 28 226 29) (buffers 512 13) (heap 1024 7950 543))