Run script each time cd is used

c19h28O2 · 04-26-2006, 04:07 AM

Hi,

Is there a way to automatically run a script each time i use the cd command?

Thanks

C19

uselpa · 04-26-2006, 04:12 AM

Not directly, but you could create your own cd command which executes your script and then does the original cd. You can achieve the same with a bash alias.

c19h28O2 · 04-26-2006, 04:24 AM

Hi,

So if I creat an alias in my .profile could i call the script from there? how would I do that?

uselpa · 04-26-2006, 04:28 AM

Try something like this, substitution the echo for your own command:

Code:

pu@slackw:~$ alias
alias d='dir'
alias dir='/usr/bin/ls $LS_OPTIONS --format=vertical'
alias ls='/usr/bin/ls $LS_OPTIONS'
alias mc='. /usr/share/mc/bin/mc-wrapper.sh'
alias v='vdir'
alias vdir='/usr/bin/ls $LS_OPTIONS --format=long'
pu@slackw:~$ alias cd='echo "my script";cd'
pu@slackw:~$ cd projects/
my script
pu@slackw:~/projects$

c19h28O2 · 04-26-2006, 08:08 AM

Hey uselpa,

Thanks for that I managed to sort it out.

I have another question, I would like to create an alias that when i cd it automatically runs ls?

Thanks

C19

uselpa · 04-26-2006, 08:27 AM

Then it's easier to use functions:

Code:

pu@slackw:~$ function cd() { builtin cd "$*" ; ls ; }
pu@slackw:~$ cd /
bin/  boot/  build/  dev/  etc/  home/  lib/  mnt/  opt/  proc/  root/  sbin/  sys/  tmp/  usr/  var/
pu@slackw:/$

c19h28O2 · 04-26-2006, 08:41 AM

Thanks

but i've pasted your code in my .profile run it again with . .profile and i get this error?

ksh: syntax error: `(' unexpected

uselpa · 04-26-2006, 09:58 AM

Which shell are you using? bash or ksh? Which distro are you using?
My example is based on bash, which is the standard shell on Linux.

c19h28O2 · 04-27-2006, 04:42 AM

Hi,

I'm using ksh and i'm using a flavour of unix svr4

Cheers

C19

uselpa · 04-27-2006, 07:38 AM

I haven't used ksh so I can't help you there. But be aware that in the Linux world people will assume that you use bash because that's the default shell for Linux (at least for all the distros I've installed in the past). So when you post a shell question to this (mainly Linux) forum, please specify that you use Korn Shell.

c19h28O2 · 04-28-2006, 04:01 AM

Hi,

I thought ksh meant Korn Shell?

uselpa · 04-28-2006, 04:39 AM

Yes, ksh is Korn Shell. But you didn't say that you used ksh, that's my point.

c19h28O2 · 05-02-2006, 09:36 AM

Quote:

Originally Posted by c19h28O2

Hi,

I'm using ksh and i'm using a flavour of unix svr4

Cheers

C19

I answered your original question no need to be so rude...

uselpa · 05-02-2006, 09:59 AM

I wasn't being rude. Just pointing out that if you ask questions related to shell in a Linux forum, you need to specify that you use ksh right from the start.

c19h28O2 · 05-02-2006, 04:19 PM

Cool, no probs

Cheers