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history EINTR bug
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From: |
gregrwm |
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Subject: |
history EINTR bug |
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Date: |
Thu, 12 Feb 2015 08:06:14 -0600 |
i now suspect bash does not properly handle EINTR while handling history.
this just happened:
bash: history: write error: Interrupted system call
so i searched and found:
http://www.gnu.org/software/libc/manual/html_node/Interrupted-Primitives.html
http://stackoverflow.com/questions/5909717/interrupted-system-call-error-when-writing-to-a-pipe
http://unix.stackexchange.com/questions/102784/occasional-error-from-bash-on-aix-interrupted-system-call
i experienced the above error with bash43-030. having experienced the
above error, and read the above pages, i now suspect bash might not
handle EINTR properly when handling history, either when servicing the
history command, or when saving history at exit. this could explain
my seeing the above error sometimes when piping history to less. and
this could explain the repetition of history in the quoted bug report
below.
i am happy to hear from you if you have questions, or even if you
don't. many thanks for all your bashing.
greg
On 16 January 2014 at 16:42, gregrwm <backuppc-users@whitleymott.net> wrote:
> Configuration Information [Automatically generated, do not change]:
> Machine: i686
> OS: linux-gnu
> Compiler: gcc
> Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i686'
> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu'
> -DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash'
> -DSHELL -DHAVE_CONFIG_H -I. -I../bash -I../bash/include
> -I../bash/lib -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector
> --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall
> uname output: Linux celerypad 3.13.0-3-generic #18-Ubuntu SMP Mon Jan
> 13 19:16:46 UTC 2014 i686 i686 i686 GNU/Linux
> Machine Type: i686-pc-linux-gnu
>
> Bash Version: 4.2
> Patch Level: 45
> Release Status: release
>
> Description:
> portions of bash history appear repeatedly in .bash_history, and thus earlier
> session history is prematurely discarded.
>
> Repeat-By:
> not predictably repeatable. no idea of the causing condition.
>
> Observations:
> in both examples below, the history file begins with two copies of a
> portion of the offending session, followed by *preceeding* session
> commands, followed by additional repetition of the offending session,
> followed by another session.
>
> Example #1 history:
> first repetition:
> 1 2014-01-15Wed17:00:30 10ut (/root/.bash_history ) root 10ut ,pts/2
> 2 2014-01-15Wed17:10:38 10ut dfm
> 3 2014-01-15Wed17:11:11 10ut aagi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 4 2014-01-15Wed17:11:27 10ut rqb vim-doc
> 5 2014-01-15Wed17:11:47 10ut agi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
>
> second repetition:
> 6 2014-01-15Wed17:00:30 10ut (/root/.bash_history ) root 10ut ,pts/2
> 7 2014-01-15Wed17:10:38 10ut dfm
> 8 2014-01-15Wed17:11:11 10ut aagi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 9 2014-01-15Wed17:11:27 10ut rqb vim-doc
> 10 2014-01-15Wed17:11:47 10ut agi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
>
> *prior* session(s):
> 11 2014-01-15Wed16:31:18 10ut apt-get install openssh-server screen
> 12 2014-01-15Wed16:31:32 10ut apt-get install openssh-server
> 13 2014-01-15Wed16:32:04 10ut df -m
> 14 2014-01-15Wed16:32:27 10ut mkdir /ql
> 15 2014-01-15Wed16:32:33 10ut mount /dev/sda1 /ql
> 16 2014-01-15Wed16:32:46 0ut (/root/.bash_history ) root 0ut ,tty1
> 17 2014-01-15Wed16:33:59 0ut . /ql/home/greg/
> 18 2014-01-15Wed16:34:14 0ut rqa trusty-alternate-i386
> 19 2014-01-15Wed16:34:46 0ut apt-get install openssh-server
> 20 2014-01-15Wed16:35:59 0ut ag update
> 21 2014-01-15Wed16:36:48 0ut apt-get update
> 22 2014-01-15Wed16:37:55 0ut apt-get install openssh-server
>
> third repetition:
> 23 2014-01-15Wed17:00:30 10ut (/root/.bash_history ) root 10ut ,pts/2
> 24 2014-01-15Wed17:10:38 10ut dfm
> 25 2014-01-15Wed17:11:11 10ut aagi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 26 2014-01-15Wed17:11:27 10ut rqb vim-doc
> 27 2014-01-15Wed17:11:47 10ut agi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 28 2014-01-15Wed17:13:18 10ut agi vim
> 29 2014-01-15Wed17:14:44 10ut rqb vim
> 30 2014-01-15Wed17:14:53 10ut agi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 31 2014-01-15Wed17:44:09 10ut llt /var/local/?p*/*
> 32 2014-01-15Wed17:44:15 10ut llt {,/*}/var/local/?p*/*
> 33 2014-01-15Wed17:44:48 10ut rqa vlc
> 34 2014-01-15Wed17:48:08 10ut dfm
> 35 2014-01-15Wed17:48:23 10ut agi lubuntu-desktop
>
> fourth repetition:
> 36 2014-01-15Wed17:00:30 10ut (/root/.bash_history ) root 10ut ,pts/2
> 37 2014-01-15Wed17:10:38 10ut dfm
> 38 2014-01-15Wed17:11:11 10ut aagi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 39 2014-01-15Wed17:11:27 10ut rqb vim-doc
> 40 2014-01-15Wed17:11:47 10ut agi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 41 2014-01-15Wed17:13:18 10ut agi vim
> 42 2014-01-15Wed17:14:44 10ut rqb vim
> 43 2014-01-15Wed17:14:53 10ut agi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 44 2014-01-15Wed17:44:09 10ut llt /var/local/?p*/*
> 45 2014-01-15Wed17:44:15 10ut llt {,/*}/var/local/?p*/*
> 46 2014-01-15Wed17:44:48 10ut rqa vlc
> 47 2014-01-15Wed17:48:08 10ut dfm
> 48 2014-01-15Wed17:48:23 10ut agi lubuntu-desktop
>
> fifth repetition, complete session:
> 49 2014-01-15Wed17:00:30 10ut (/root/.bash_history ) root 10ut ,pts/2
> 50 2014-01-15Wed17:10:38 10ut dfm
> 51 2014-01-15Wed17:11:11 10ut aagi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 52 2014-01-15Wed17:11:27 10ut rqb vim-doc
> 53 2014-01-15Wed17:11:47 10ut agi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 54 2014-01-15Wed17:13:18 10ut agi vim
> 55 2014-01-15Wed17:14:44 10ut rqb vim
> 56 2014-01-15Wed17:14:53 10ut agi vim vim-doc htop twm xterm
> vnc4server xvnc4viewer vlc vlc-plugin-jack xpdf
> 57 2014-01-15Wed17:44:09 10ut llt /var/local/?p*/*
> 58 2014-01-15Wed17:44:15 10ut llt {,/*}/var/local/?p*/*
> 59 2014-01-15Wed17:44:48 10ut rqa vlc
> 60 2014-01-15Wed17:48:08 10ut dfm
> 61 2014-01-15Wed17:48:23 10ut agi lubuntu-desktop
> 62 2014-01-15Wed18:04:46 10ut agi rsync
> 63 2014-01-15Wed18:06:33 10ut rqa rsync
> 64 2014-01-15Wed18:06:56 10ut rqb rsync
> 65 2014-01-15Wed18:07:01 10ut - /var/local/dpkg/rqa.2014-01-15.rsync
> 66 2014-01-15Wed18:07:40 10ut agi lubuntu-desktop
> 67 2014-01-15Wed21:42:36 10ut rqb lubuntu-desktop
> 68 2014-01-16Thu10:41:56 10ut htop
> 69 2014-01-16Thu10:46:35 10ut dfm
> 70 2014-01-16Thu10:47:21 10ut swapon -s
> 71 2014-01-16Thu10:51:43 10ut cfdisk
> 72 2014-01-16Thu10:57:08 10ut ll /d*/d*/*d/*
> 73 2014-01-16Thu11:02:17 10ut lt /~/*fst*
> 74 2014-01-16Thu11:29:50 10ut b {,/*}/etc/fstab
> 75 2014-01-16Thu11:32:02 10ut cfdisk
> 76 2014-01-16Thu11:36:29 10ut eb
>
> additional sessions:
> 77 2014-01-15Wed17:17:19 20ut (/root/.bash_history
> 2014-01-15Wed17:13:09) root 20ut ,pts/3
> 78 2014-01-15Wed17:17:24 20ut ll /d*/d*/*d/*
> 79 2014-01-15Wed17:18:37 20ut cfdisk
> 80 2014-01-15Wed17:30:34 20ut lt
> {,/*}/boot/grub{,/*}/*{grub*c*f,menu*lst}*
> 81 2014-01-15Wed17:31:08 20ut lt
> {,/*}/boot/grub{,/*}/*{grub*c*f,menu*lst,core*im*}*
> 82 2014-01-15Wed17:48:52 20ut - /var/local/dpkg/rqb.2014-01-15.vim-doc
> 83 2014-01-15Wed17:56:41 20ut llt {,/*}/h*/*/.ss*/*
> 84 2014-01-15Wed17:57:08 20ut lu {,/*}/h*/*/.ss*/*
> 85 2014-01-15Wed17:57:29 20ut - /ql/home/k/.ssh
> 86 2014-01-15Wed18:12:11 20ut cP /tmp/10_linux /etc/grub.d/10_linux
> 87 2014-01-15Wed18:12:16 20ut b /etc/grub.d/10_linux
> 88 2014-01-15Wed18:14:07 20ut mv -vb /hu /hx
> 89 2014-01-15Wed18:14:12 20ut mount /hx
> 90 2014-01-15Wed18:14:56 20ut b /hx/boot/grub/menu.lst
> 91 2014-01-15Wed18:15:35 20ut lt {,/*}/etc/default/grub
> 92 2014-01-15Wed18:15:41 20ut vid {,/*}/etc/default/grub
> 93 2014-01-15Wed18:17:02 20ut b {,/*}/etc/default/grub
> 94 2014-01-16Thu10:36:51 20ut u mino
> 95 2014-01-15Wed17:15:33 00ut (/root/.bash_history
> 2014-01-15Wed17:13:09) root 00ut ,pts/1
> 96 2014-01-15Wed17:16:07 00ut lt {,/*}/etc/grub.d/40_custom
> 97 2014-01-15Wed17:16:14 00ut lt {,/*}/etc/fstab
> 98 2014-01-15Wed17:16:18 00ut b {,/*}/etc/fstab
> 99 2014-01-15Wed17:16:22 00ut b {,/*}/etc/grub.d/40_custom
> 100 2014-01-15Wed17:16:35 00ut vim /etc/fstab
> 101 2014-01-15Wed18:09:40 00ut LLt. /tmp
> 102 2014-01-15Wed18:13:26 00ut dfm
> 103 2014-01-15Wed18:13:34 00ut md /hu
> 104 2014-01-15Wed18:13:37 00ut mount /hu
> 105 2014-01-15Wed18:13:51 00ut t /etc/fstab
> 106 2014-01-16Thu11:38:04 00ut eb
>
> Example #2 history:
> first repetition:
> 1 2014-01-06Mon15:42:19 00us (/root/.bash_history ) root 00us ,pts/0
> 2 2014-01-06Mon15:42:32 00us ag update
> 3 2014-01-06Mon15:45:08 00us dfm
> 4 2014-01-06Mon15:45:29 00us bim /etc/fstab
> 5 2014-01-06Mon15:48:53 00us . /pl/var/cache/ap
> 6 2014-01-06Mon15:48:55 00us . /pl/var/cache/apt
> 7 2014-01-06Mon15:49:00 00us LLt.
> 8 2014-01-06Mon15:49:15 00us - *
> 9 2014-01-06Mon16:41:00 00us . /etc/init.d
> 10 2014-01-06Mon16:41:17 00us ll *ootl*
> 11 2014-01-06Mon16:41:43 00us -~ *ootl*
> 12 2014-01-06Mon16:42:18 00us l *remo*
> 13 2014-01-06Mon19:41:25 00us -~ /etc/grub.d/30_os-prober
> 14 2014-01-06Mon19:41:45 00us b /etc/grub.d/10_linux
> 15 2014-01-06Mon19:41:50 00us b /etc/grub.d/00_header
> 16 2014-01-06Mon19:51:50 00us agp gcc-4.6-base
> 17 2014-01-06Mon19:52:50 00us rqb gcc-4.6-base
> 18 2014-01-06Mon19:53:32 00us agp friendly-recovery
> 19 2014-01-06Mon19:55:35 00us agp grub-gfxpayload-lists
>
> second repetition:
> 20 2014-01-06Mon15:42:19 00us (/root/.bash_history ) root 00us ,pts/0
> 21 2014-01-06Mon15:42:32 00us ag update
> 22 2014-01-06Mon15:45:08 00us dfm
> 23 2014-01-06Mon15:45:29 00us bim /etc/fstab
> 24 2014-01-06Mon15:48:53 00us . /pl/var/cache/ap
> 25 2014-01-06Mon15:48:55 00us . /pl/var/cache/apt
> 26 2014-01-06Mon15:49:00 00us LLt.
> 27 2014-01-06Mon15:49:15 00us - *
> 28 2014-01-06Mon16:41:00 00us . /etc/init.d
> 29 2014-01-06Mon16:41:17 00us ll *ootl*
> 30 2014-01-06Mon16:41:43 00us -~ *ootl*
> 31 2014-01-06Mon16:42:18 00us l *remo*
> 32 2014-01-06Mon19:41:25 00us -~ /etc/grub.d/30_os-prober
> 33 2014-01-06Mon19:41:45 00us b /etc/grub.d/10_linux
> 34 2014-01-06Mon19:41:50 00us b /etc/grub.d/00_header
> 35 2014-01-06Mon19:51:50 00us agp gcc-4.6-base
> 36 2014-01-06Mon19:52:50 00us rqb gcc-4.6-base
> 37 2014-01-06Mon19:53:32 00us agp friendly-recovery
> 38 2014-01-06Mon19:55:35 00us agp grub-gfxpayload-lists
>
> *prior* session(s):
> 39 2014-01-07Tue02:35:32 00us pg SCR
> 40 2014-01-07Tue02:35:56 00us (/root/.bash_history
> 2014-01-06Mon19:55:40) root 00us ,pts/6
> 41 2014-01-07Tue02:36:03 00us pg SC
> 42 2014-01-07Tue02:27:53 0us (/root/.bash_history
> 2014-01-06Mon19:55:40) root 0us ,pts/5
> 43 2014-01-07Tue02:35:19 0us sa
>
> third repetition, complete session:
> 44 2014-01-06Mon15:42:19 00us (/root/.bash_history ) root 00us ,pts/0
> 45 2014-01-06Mon15:42:32 00us ag update
> 46 2014-01-06Mon15:45:08 00us dfm
> 47 2014-01-06Mon15:45:29 00us bim /etc/fstab
> 48 2014-01-06Mon15:48:53 00us . /pl/var/cache/ap
> 49 2014-01-06Mon15:48:55 00us . /pl/var/cache/apt
> 50 2014-01-06Mon15:49:00 00us LLt.
> 51 2014-01-06Mon15:49:15 00us - *
> 52 2014-01-06Mon16:41:00 00us . /etc/init.d
> 53 2014-01-06Mon16:41:17 00us ll *ootl*
> 54 2014-01-06Mon16:41:43 00us -~ *ootl*
> 55 2014-01-06Mon16:42:18 00us l *remo*
> 56 2014-01-06Mon19:41:25 00us -~ /etc/grub.d/30_os-prober
> 57 2014-01-06Mon19:41:45 00us b /etc/grub.d/10_linux
> 58 2014-01-06Mon19:41:50 00us b /etc/grub.d/00_header
> 59 2014-01-06Mon19:51:50 00us agp gcc-4.6-base
> 60 2014-01-06Mon19:52:50 00us rqb gcc-4.6-base
> 61 2014-01-06Mon19:53:32 00us agp friendly-recovery
> 62 2014-01-06Mon19:55:35 00us agp grub-gfxpayload-lists
> 63 2014-01-06Mon19:56:31 00us agp laptop-detect
> 64 2014-01-06Mon19:57:52 00us agp libapt-inst1.4
> 65 2014-01-06Mon19:58:54 00us agp libbind9-80
> 66 2014-01-07Tue02:39:16 00us agi aria2
> 67 2014-01-07Tue02:42:52 00us . /tmp
> 68 2014-01-07Tue02:43:18 00us u mino
> 69 2014-01-07Tue09:45:15 00us eb
>
> additional session:
> 70 2014-01-06Mon15:42:55 10us (/root/.bash_history ) root 10us ,pts/1
> 71 2014-01-06Mon15:44:53 10us agu
> 72 2014-01-06Mon15:47:53 10us k %
> 73 2014-01-06Mon15:48:27 10us umount /var/cache/apt
> 74 2014-01-06Mon15:48:34 10us ag update
> 75 2014-01-06Mon15:49:36 10us agu
> 76 2014-01-06Mon19:45:23 10us rqa agu
> 77 2014-01-06Mon19:54:02 10us rql friendly-recovery
> 78 2014-01-07Tue02:55:47 10us vim /pv/etc/grub.d/40_custom
> 79 2014-01-07Tue09:30:23 10us dfm
> 80 2014-01-07Tue09:39:01 10us mv /tmp/t* /
> 81 2014-01-07Tue09:39:06 10us ll. /
> 82 2014-01-07Tue09:41:22 10us apt-get install xorg
> 83 2014-01-07Tue09:43:28 10us rqb xorg
> 84 2014-01-07Tue09:45:25 10us eb
>
> Example #1 .bash_history:
> #1389826830
> (/root/.bash_history ) root 10ut ,pts/2
> #1389827438
> dfm
> #1389827471
> aagi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389827487
> rqb vim-doc
> #1389827507
> agi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389826830
> (/root/.bash_history ) root 10ut ,pts/2
> #1389827438
> dfm
> #1389827471
> aagi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389827487
> rqb vim-doc
> #1389827507
> agi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389825078
> apt-get install openssh-server screen
> #1389825092
> apt-get install openssh-server
> #1389825124
> df -m
> #1389825147
> mkdir /ql
> #1389825153
> mount /dev/sda1 /ql
> #1389825166
> (/root/.bash_history ) root 0ut ,tty1
> #1389825239
> . /ql/home/greg/
> #1389825254
> rqa trusty-alternate-i386
> #1389825286
> apt-get install openssh-server
> #1389825359
> ag update
> #1389825408
> apt-get update
> #1389825475
> apt-get install openssh-server
> #1389826830
> (/root/.bash_history ) root 10ut ,pts/2
> #1389827438
> dfm
> #1389827471
> aagi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389827487
> rqb vim-doc
> #1389827507
> agi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389827598
> agi vim
> #1389827684
> rqb vim
> #1389827693
> agi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389829449
> llt /var/local/?p*/*
> #1389829455
> llt {,/*}/var/local/?p*/*
> #1389829488
> rqa vlc
> #1389829688
> dfm
> #1389829703
> agi lubuntu-desktop
> #1389826830
> (/root/.bash_history ) root 10ut ,pts/2
> #1389827438
> dfm
> #1389827471
> aagi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389827487
> rqb vim-doc
> #1389827507
> agi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389827598
> agi vim
> #1389827684
> rqb vim
> #1389827693
> agi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389829449
> llt /var/local/?p*/*
> #1389829455
> llt {,/*}/var/local/?p*/*
> #1389829488
> rqa vlc
> #1389829688
> dfm
> #1389829703
> agi lubuntu-desktop
> #1389826830
> (/root/.bash_history ) root 10ut ,pts/2
> #1389827438
> dfm
> #1389827471
> aagi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389827487
> rqb vim-doc
> #1389827507
> agi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389827598
> agi vim
> #1389827684
> rqb vim
> #1389827693
> agi vim vim-doc htop twm xterm vnc4server xvnc4viewer vlc vlc-plugin-jack
> xpdf
> #1389829449
> llt /var/local/?p*/*
> #1389829455
> llt {,/*}/var/local/?p*/*
> #1389829488
> rqa vlc
> #1389829688
> dfm
> #1389829703
> agi lubuntu-desktop
> #1389830686
> agi rsync
> #1389830793
> rqa rsync
> #1389830816
> rqb rsync
> #1389830821
> - /var/local/dpkg/rqa.2014-01-15.rsync
> #1389830860
> agi lubuntu-desktop
> #1389843756
> rqb lubuntu-desktop
> #1389890516
> htop
> #1389890795
> dfm
> #1389890841
> swapon -s
> #1389891103
> cfdisk
> #1389891428
> ll /d*/d*/*d/*
> #1389891737
> lt /~/*fst*
> #1389893390
> b {,/*}/etc/fstab
> #1389893522
> cfdisk
> #1389893789
> eb
> #1389827839
> (/root/.bash_history 2014-01-15Wed17:13:09) root 20ut ,pts/3
> #1389827844
> ll /d*/d*/*d/*
> #1389827917
> cfdisk
> #1389828634
> lt {,/*}/boot/grub{,/*}/*{grub*c*f,menu*lst}*
> #1389828668
> lt {,/*}/boot/grub{,/*}/*{grub*c*f,menu*lst,core*im*}*
> #1389829732
> - /var/local/dpkg/rqb.2014-01-15.vim-doc
> #1389830201
> llt {,/*}/h*/*/.ss*/*
> #1389830228
> lu {,/*}/h*/*/.ss*/*
> #1389830249
> - /ql/home/k/.ssh
> #1389831131
> cP /tmp/10_linux /etc/grub.d/10_linux
> #1389831136
> b /etc/grub.d/10_linux
> #1389831247
> mv -vb /hu /hx
> #1389831252
> mount /hx
> #1389831296
> b /hx/boot/grub/menu.lst
> #1389831335
> lt {,/*}/etc/default/grub
> #1389831341
> vid {,/*}/etc/default/grub
> #1389831422
> b {,/*}/etc/default/grub
> #1389890211
> u mino
> #1389827733
> (/root/.bash_history 2014-01-15Wed17:13:09) root 00ut ,pts/1
> #1389827767
> lt {,/*}/etc/grub.d/40_custom
> #1389827774
> lt {,/*}/etc/fstab
> #1389827778
> b {,/*}/etc/fstab
> #1389827782
> b {,/*}/etc/grub.d/40_custom
> #1389827795
> vim /etc/fstab
> #1389830980
> LLt. /tmp
> #1389831206
> dfm
> #1389831214
> md /hu
> #1389831217
> mount /hu
> #1389831231
> t /etc/fstab
> #1389893884
> eb
>
> Example #2 .bash_history:
> #1389044539
> (/root/.bash_history ) root 00us ,pts/0
> #1389044552
> ag update
> #1389044708
> dfm
> #1389044729
> bim /etc/fstab
> #1389044933
> . /pl/var/cache/ap
> #1389044935
> . /pl/var/cache/apt
> #1389044940
> LLt.
> #1389044955
> - *
> #1389048060
> . /etc/init.d
> #1389048077
> ll *ootl*
> #1389048103
> -~ *ootl*
> #1389048138
> l *remo*
> #1389058885
> -~ /etc/grub.d/30_os-prober
> #1389058905
> b /etc/grub.d/10_linux
> #1389058910
> b /etc/grub.d/00_header
> #1389059510
> agp gcc-4.6-base
> #1389059570
> rqb gcc-4.6-base
> #1389059612
> agp friendly-recovery
> #1389059735
> agp grub-gfxpayload-lists
> #1389044539
> (/root/.bash_history ) root 00us ,pts/0
> #1389044552
> ag update
> #1389044708
> dfm
> #1389044729
> bim /etc/fstab
> #1389044933
> . /pl/var/cache/ap
> #1389044935
> . /pl/var/cache/apt
> #1389044940
> LLt.
> #1389044955
> - *
> #1389048060
> . /etc/init.d
> #1389048077
> ll *ootl*
> #1389048103
> -~ *ootl*
> #1389048138
> l *remo*
> #1389058885
> -~ /etc/grub.d/30_os-prober
> #1389058905
> b /etc/grub.d/10_linux
> #1389058910
> b /etc/grub.d/00_header
> #1389059510
> agp gcc-4.6-base
> #1389059570
> rqb gcc-4.6-base
> #1389059612
> agp friendly-recovery
> #1389059735
> agp grub-gfxpayload-lists
> #1389083732
> pg SCR
> #1389083756
> (/root/.bash_history 2014-01-06Mon19:55:40) root 00us ,pts/6
> #1389083763
> pg SC
> #1389083273
> (/root/.bash_history 2014-01-06Mon19:55:40) root 0us ,pts/5
> #1389083719
> sa
> #1389044539
> (/root/.bash_history ) root 00us ,pts/0
> #1389044552
> ag update
> #1389044708
> dfm
> #1389044729
> bim /etc/fstab
> #1389044933
> . /pl/var/cache/ap
> #1389044935
> . /pl/var/cache/apt
> #1389044940
> LLt.
> #1389044955
> - *
> #1389048060
> . /etc/init.d
> #1389048077
> ll *ootl*
> #1389048103
> -~ *ootl*
> #1389048138
> l *remo*
> #1389058885
> -~ /etc/grub.d/30_os-prober
> #1389058905
> b /etc/grub.d/10_linux
> #1389058910
> b /etc/grub.d/00_header
> #1389059510
> agp gcc-4.6-base
> #1389059570
> rqb gcc-4.6-base
> #1389059612
> agp friendly-recovery
> #1389059735
> agp grub-gfxpayload-lists
> #1389059791
> agp laptop-detect
> #1389059872
> agp libapt-inst1.4
> #1389059934
> agp libbind9-80
> #1389083956
> agi aria2
> #1389084172
> . /tmp
> #1389084198
> u mino
> #1389109515
> eb
> #1389044575
> (/root/.bash_history ) root 10us ,pts/1
> #1389044693
> agu
> #1389044873
> k %
> #1389044907
> umount /var/cache/apt
> #1389044914
> ag update
> #1389044976
> agu
> #1389059123
> rqa agu
> #1389059642
> rql friendly-recovery
> #1389084947
> vim /pv/etc/grub.d/40_custom
> #1389108623
> dfm
> #1389109141
> mv /tmp/t* /
> #1389109146
> ll. /
> #1389109282
> apt-get install xorg
> #1389109408
> rqb xorg
> #1389109525
> eb
>
> relevant portions of .bashrc:
> alias funct=function
> alias t='less -n'
> alias tn=less
> set -o notify
> set -o noclobber
> set -o physical
> shopt -s dotglob extglob nocaseglob histappend histverify histreedit
> checkwinsize
> shopt -u sourcepath
> HISTSIZE=1999
> HISTFILESIZE=49999
> HISTCONTROL=ignoredups
> HISTIGNORE=j:f:b:-:s:h:H:v:l.:ll.:lt.:llt.
> FIGNORE='.TBL:.o:~'
> HISTTIMEFORMAT="%F%a%T " IFSo=$IFS
> funct h_()(IFS= j= b=" ";set -f;while read -r h;do IFS=$IFSo i=($h)
> #augment history listing with window column after date column
> [[ ${i[2]} = \(/*/.bash_history ]]&&j=${i[${#i[@]}-2]};echo
> "${h::28}${b:${#j}}$j${h:28}";IFS=;done)
> funct h { if [[ $@ ]];then history "$@";else history|h_ 2>&1|tn;fi;}
> funct H { history|h_|sort -k2,2 -k1n 2>&1|tn;}
> alias histtit='PROMPT_COMMAND='\''history -s "($HISTFILE $(date +%F%a%T
> -r$HISTFILE 2>/dev/null||true)) $USER $WINDOW$((SHLVL-1))$disrel
> $DISPLAY,$tty";unset PROMPT_COMMAND'\'
> histtit
- history EINTR bug,
gregrwm <=