bashrc overwritten - maemo.org

wolke | # 1 | 2012-01-22, 23:33 | Report

whoa: does anyone find that their .bashrc file gets overwritten?
something appears to touch just the line that sets PS1. this could be me somehow, but i really dont think so....

Code:

diff /root/.bashrc /root/.bashrc-from-before-reboot
h='\h'
u='\u'
w='\w'
c1='\[\033[01;32m\]'
c2='\[\033[01;34m\]'
cEnd='\[\033[00m\]'
-PS1="$c1$u$h$cEnd:$c2$w$cEnd\$ "
+PS1='\h-40-4_PR_005:$c2$w$cEnd\$ "

it appears to find a line that looks like

Code:

PS1=(BEFORE):(AFTER)

and replace it with

Code:

PS1='\h-VERSION:AFTER

.

which is really annoying, since it is malformed if you dont have a closing single quote {which i dont, as above}.

im going to add another line that sets it more obliquely until i figure out WHAT is setting it and kill it.

EDIT: a workaround is to do COLON=':', and then use $COLON instead of ':' in the line that sets the PS1.
this is not a solution, though, because the replace pattern is so general it could produce all sorts of, erm, interesting behaviour, like bricking my n9.

Last edited by wolke; 2012-01-23 at 17:22.

wolke | # 2 | 2012-01-22, 23:50 | Report

im using bash, btw, not ash.
i have a .profile:
unset DISPLAY && exec bash

wolke | # 3 | 2012-01-22, 23:53 | Report

after more extensive testing, it seems that ANY line that matches the perl regex:

Code:

(.*)PS1=(.*):(.*)

will be replaced with

Code:

$1PS1=$x:$2

where $x is something like

Code:

\h-40-4_PR_005

including comments...

#no PS1=.*:.* line, so n9 wont kill it
=>
#no PS1='\h-40-4_PR_005:.* line, so n9 wont kill it

this is SO stupid its incredible..

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zero.vishnu | # 4 | 2012-01-23, 07:57 | Report

Hi,

It is possible that there is a watchdog service running in the background that prevents bashrc from being modified.

But more importantly, why are you tinkering with bashrc? You could just write your own script, and set whatever paths you want there.

wolke | # 5 | 2012-01-23, 17:19 | Report

Originally Posted by zero.vishnu View Post

Hi,

It is possible that there is a watchdog service running in the background that prevents bashrc from being modified.

But more importantly, why are you tinkering with bashrc? You could just write your own script, and set whatever paths you want there.

thanks for the reply!

this is my own .bashrc, in $HOME. i use it on every system that runs bash, {n900, laptop, n9, desktop, android ereader, etc}.

the bashrc works fine. i have an open kernel installed, and bash is running nicely, both when i ssh in and when i run meego-terminal. my aliases work, my gnu find/grep work {instead of busybox}.

....until i reboot.
when i reboot, the $HOME/.bashrc gets modified in a strange fashion.

it doesnt get replaced entirely, which i would understand and try to workaround.

only certain lines get changed, and in a very poorly programmed way.

the lines that get changed have to have the string "PS1=" and then the string ":" somewhere after it. lines that meet this arbitrary criteria are replaced as i describe above.

Attached Files

bashrc.txt (2.1 KB, 138 views)

rcolistete | # 6 | 2012-01-23, 20:59 | Report

I also use bash (but not as default shell) on Nokia N9, and the .bashrc is never rewritten. My PS1 line :

Code:

# Set colors for prompt
#
col_bold="\033[1m"
col_red="\033[1;31m"
col_green="\033[1;32m"
col_yellow="\033[1;33m"
col_blue="\033[1;34m"
col_purple="\033[1;35m"
col_cyan="\033[1;36m"
col_normal="\033[0;39m"

# Prompt Settings
# PS1
PS1="\[${col_cyan}\]\u@\h:\[${col_blue}\]\w\[${col_normal}\]\$ "
export PS1

wolke | # 7 | 2012-01-23, 21:24 | Report

Originally Posted by rcolistete View Post

I also use bash (but not as default shell) on Nokia N9, and the .bashrc is never rewritten. My PS1 line :

Code:

# Set colors for prompt
#
col_bold="\033[1m"
col_red="\033[1;31m"
col_green="\033[1;32m"
col_yellow="\033[1;33m"
col_blue="\033[1;34m"
col_purple="\033[1;35m"
col_cyan="\033[1;36m"
col_normal="\033[0;39m"

# Prompt Settings
# PS1
PS1="\[${col_cyan}\]\u@\h:\[${col_blue}\]\w\[${col_normal}\]\$ "
export PS1

cool! now, do you put it in /home/.bashrc, or /root/.bashrc {root's home dir}

i believe only the one in /root/.bashrc is getting rewritten for me, contrary to what i implied earlier.

rcolistete | # 8 | 2012-01-25, 14:57 | Report

Yeah, I am surprised to confirm that '/root/.bashrc' has the PS1 overwritten !

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wolke | # 9 | 2012-01-25, 18:33 | Report

Originally Posted by rcolistete View Post

Yeah, I am surprised to confirm that '/root/.bashrc' has the PS1 overwritten !

thx, glad this is not me-only. weird bug..

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