[arch-general] bash variable PS1 confuses the terminal somehow
ataraxia937 at gmail.com
Wed Sep 28 09:36:52 EDT 2011
On Wed, Sep 28, 2011 at 9:22 AM, <bfsc.yb at gmail.com> wrote:
> 13 PROMPT_COMMAND='
> 14 if (($?)); then
> 15 warn="^[[31mWARNING^[[m"
> 16 else
> 17 warn=
> 18 fi
> 19 date=`date`
> 20 PS1="^[[s^[[$(($COLUMNS-28))C^[[0;33m$date^[[u^[[0;31m$warn^[[0;32m[^[[1;33m\u^[[0;32m@^[[1;36m\w^[[0;32m]\$^[[m"
> 21 '
> i'm using this PROMPT_COMMAND to set PS1 everytime it is played, it seems to work perfectly except later i found a strange behavior of the terminal, both in xterm under X and agetty under the console. for example, when under the console, i found the terminal column indicated by the bash variable $COLUMNS is 160, however, when i type some command about 50 characters long, the line which i'm typing wraps to the begining, and destroys what i typed earlier, this makes typing long commands really difficult...and everything is just fine when i just set the PS1 variable to a very simple value without escape sequences.
> anyone knows how to fix this?
Put \[ and \] around all the sections that don't actually print things
to the terminal, so bash knows not to count them when determining how
long the prompt is.
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