cc: [email protected]
Subject: Re: [ast-users] Possible ksh 93 u issue ?
--------
> Hello,
>
> We have noticed the following behavior within ksh 93 u and curious to know if
> po
> ssible bug or hidden feature.
>
> Using Version JM 93u 2011-02-08 on Red Hat Enterprise Linux AS release 4
> (Nahan
> t Update 8)
>
> $ echo ${.sh.version}
> Version JM 93u 2011-02-08
>
> With the following environment variables set
>
> HISTFILE=/home/wtkeeler/.hist_palltc07
> HISTSIZE=1000
> EDITOR=vi
> FCEDIT=vi
>
> If you are sitting at the ksh prompt and type # and space bar one gets a
> random
> command line listing from the $HISTFILE
>
> $ #
> 1) id
> 2) win naftcltc12
> 3) win naftcltc11
> 4) win naftcltc10
> 5) win naftcltc01
> 6) cd /etc
> 7) -lt
>
> Ksh appears to do a seek into the history file and output a menu of command
> hist
> ory. Below is the strace
>
>
>
> Note the user is maintaining a unique $HISTFILE per login machine. User
> .profil
> e has
>
>
>
> HISTFILE="$HOME/.hist_$(uname -n)"
>
> export HOSTFILE
>
>
>
>
>
> Open file descriptor 3 in the above strace is the $HISTFILE.
>
>
> /proc/26441> ls -l fd
> total 4
> lrwx------ 1 wtkeeler wtkeeler 64 Jun 27 10:31 0 -> /dev/pts/610
> lrwx------ 1 wtkeeler wtkeeler 64 Jun 27 10:31 1 -> /dev/pts/610
> lrwx------ 1 wtkeeler wtkeeler 64 Jun 27 10:27 2 -> /dev/pts/610
> lrwx------ 1 wtkeeler wtkeeler 64 Jun 27 10:31 3 ->
> /home/wtkeeler/.hist_palltc
> 07
>
> Let us know if you need any more information in trying to replicate or
> diagnose
> the issue.
>
> Thank You
>
> Michael
>
> Michael Nemeth
> Global Engineering Systems
> [cid:[email protected]]
> *[email protected]
>
>
That was due to a compile option SHOPT_EDPREDICT that was added 2010-05-20.
Here is a description from the RELEASE file:
10-05-20 +The compile option SHOPT_EDPREDICT has been added. When this option
is on, as you type a line beginning with a # the following characters
are treated as a shell pattern and cause matching lines from the
history file to be displayed as a numbered list as you type.
You can scroll up and down this list or you can use <ESC>nTAB
to make this the current line (n defaults to 1 of ommitted) or
<ESC>n<cr> to execute.
If you are just typing comments, you should be able to ignore the predictions
that show up on the screen.
David Korn
[email protected]
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