Can a child shell inherit 'alias'es?
h...@torolab.ibm.com
Does anyone know if a child shell can inherit
'alias'es from the parent?
What else DOESN'T the parent shell pass on to
the child?
Thx,
Henry
h...@ca.ibm.com
Niël Lambrechts
by the child.
Here is a list:
Subprocesses inherit:
1. current directory
2. environment variables
3. stdin, stdout, stderr file descriptors
Subshells inherit:
1. Any characteristics defined in environment file
2. Signals that are ignored
It does NOT inherit:
1. Shell variables, except environment variables and those
defined in environment file
2. Handling of signals that are not ignored
Hope this helps.
regards,
Niel Lambrechts
Certified AIX System Administrator
IBM Global Services
South Africa
ni...@za.ibm.com
-------------------------------------------------------------
Chan
Thx for the advice Niel.
But which environment file are you talking about?
I tried putting the alias under /etc/environment,
but that didn't get passed on.
One more thing:
when I just type:
$ alias
I get
autoload='typeset -fu'
command='command '
functions='typeset -f'
hash='alias -t -'
history='fc -l'
integer='typeset -i'
local=typeset
nohup='nohup '
r='fc -e -'
stop='kill -STOP'
suspend='kill -STOP $$'
type='whence -v'
Where are these aliases coming from?
Thx,
Henry
h...@ca.ibm.com
Niël Lambrechts (ni...@isgaix.co.za) wrote:
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: If you define the alias in the environment file, it should be inherited
:
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Rhonda Thorne
I am running AIX 4.2.1 and alias is in /usr/bin. However, you can do a
find ......
find / -name *alias*
and locate it on your system.
Alos, there is a man page on alias that you can review.
Rhonda
Mikko Laitamaki
Chan wrote:
>But which environment file are you talking about?
>I tried putting the alias under /etc/environment,
>but that didn't get passed on.
>One more thing:
>when I just type:
>$ alias
>I get
>autoload='typeset -fu'
>command='command '
...
>Where are these aliases coming from?
>
If you are using ksh ...
your first shell (login shell) executes /etc/profile and
$HOME/.profile files and alla aliasses defined in those
files are then by use in that login-shell. But if you
start a new ksh the aliasses defined are not usable. For that
reaseon it is usual to define an enviroment file usually
one for each user named by example $HOME/.kshrc . If you
want to use aliasses in shells not started as login shell,
you need to insert enviroment variable ENV to point to that
file in your own .profile or in systemwide /etc/profile file.
A line "export ENV=$HOME/.kshrc" would set it in one or other.
And then put your aliases in .kshrc -file.
$ echo $ENV
/home/mla/.kshrc
$
$ cat ~/.kshrc
alias l='ls -F'
alias del='rm -i'
...
$
--
mam...@uta.fi Mikko Laitamaki University of Tampere
-- Will Bill bill You? --
get Dilbert Unproductivity Toolkit
Garry Garrett
Just to be clear, what shell are we talking about? Korn? C-Shell?
Obviously not Borne in that Borne shells don't have aliases. Do
your comments apply to all shells?
--
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Norman Levin
> ------------------------------
>
> From: h...@toraix1.torolab.ibm.com (Chan)
> Date: 21 May 1998 16:58:13 GMT
> Subject: Re: Can a child shell inherit 'alias'es?
>
> Thx for the advice Niel.
> I tried putting the alias under /etc/environment,
> but that didn't get passed on.
> One more thing:
> when I just type:
> $ alias
> I get
> autoload='typeset -fu'
> command='command '
> hash='alias -t -'
> history='fc -l'
> integer='typeset -i'
> local=typeset
> nohup='nohup '
> r='fc -e -'
> stop='kill -STOP'
> suspend='kill -STOP $$'
> type='whence -v'
>
>
a login shell such as ksh, bsh or csh, the alias's are NOT passed on.
Thus, the ENV variable in ksh is used to propogate alias to su'd shells.
The alias you are listing are the built in alias to the kshell.
--
Norman Levin
VM/dynAmIX Inc.
Hemant Shah
While stranded on information super highway Chan wrote:
:)Thx for the advice Niel.
:)But which environment file are you talking about?
:)I tried putting the alias under /etc/environment,
:)but that didn't get passed on.
:)One more thing:
:)when I just type:
:)$ alias
:)I get
:)autoload='typeset -fu'
:)command='command '
:)functions='typeset -f'
:)hash='alias -t -'
:)history='fc -l'
:)integer='typeset -i'
:)local=typeset
:)nohup='nohup '
:)r='fc -e -'
:)stop='kill -STOP'
:)suspend='kill -STOP $$'
:)type='whence -v'
:)
:)Where are these aliases coming from?
:)
:)Thx,
:)Henry
:)h...@ca.ibm.com
:)
All the exported variables will be available to child process.
If you want to export alies then use "alias -x"
Example:
alias -x ll="ls -l"
IMHO exporting alias is bad idea. I always rely on absolute path in my
scripts.
--
Hemant Shah, LIDP Inc. /-------------------\ ^~~~~^
Voice: +1 630 960 0133 x 664 |TECHNOLOGY | | |
Fax: +1 630 960 0717 |No place for wimps | o|-OO-|o
E-mail: sh...@xnet.com | -Dilbert |--- | () |
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