Ash profile/configuration file

Question

I am looking for a way to customize Ash sessions with my own sets of aliases and whatnots. What is the Ash equivalent of Bash's bashrc files?

score 49 · Accepted Answer · answered Dec 26 '14 at 17:54

49

Ash first reads the following files (if they exist):

System: /etc/profile
User: ~/.profile

answered Dec 26 '14 at 17:54

reg

1,143

13

Provided that it is run as the login shell, which isn't the default (e.g. in Alpine Linux / Docker) – Jakub Holý Feb 01 '17 at 10:29
3

@JakubHolý did you find a way to run profile script for non-login shell? – David Lukac Nov 28 '17 at 13:20
1

@DavidLukac - See my other Answer here for non-login shells. – spechter Jan 22 '18 at 00:21
What do you mean by "first" reads these files? Will it do something else afterwards? – HelloGoodbye Feb 16 '20 at 02:47
2

Those are equivalent of .profile, the question is about .bashrc. – Scorpion Nov 29 '22 at 20:51

spechter · Answer 2 · 2022-10-28T11:42:54.560

17

A non-login 'ash' or 'dash'-based shell may also 'source' a file if that file's full path is contained in the environment variable ENV (or perhaps SHINIT).

So if you set that somehow (Maybe in your ~/.profile, or some other 'overarching' environment control), then any future forked shells will run that script. Very handy for non-login cases.

Example: In your .profile, something like:

ENV=$HOME/.ashrc; export ENV
. $ENV

Or if you like being explicit:

ENV=/home/kwest/.ashrc; export ENV
# File in 'ENV' will be sourced for future shells. Also source it for this login shell:
. $ENV

Note that you should set ENV to a full explicit path, as the above will do. Don't use '~'.

It's hard to find explicit documentation on this for ash/dash, but it is confirmed to work on busybox-w32 (running on Windows). In fact it's hard to find good documentation on the featureset of ash at all.

UPDATE: There are a range of ash variants in the wild. 'ENV' may not work with all of them. There is some info on variants here: https://www.in-ulm.de/~mascheck/various/ash/

There is a suggestion in there that some ash variants may use 'SHINIT' in place of ENV.

edited Oct 28 '22 at 11:42

answered Jan 22 '18 at 00:20

spechter

271

3

Not working for me under Alpine 3.7. – knite Jun 14 '18 at 22:50
2

@knite Busybox's Ash (used by Alpine) uses ENV. – kirbyfan64sos Nov 26 '18 at 00:34
1

Has the ENV or SHINIT variable just to be set or to be set to a specific value? I am trying to force docker to read .profile in /root/.profile without explicitly starting with /bin/sh -l – Leon Apr 17 '19 at 21:12
@Leon - ENV (or maybe SHINIT) needs to contain the full path of the file to load/source. But this is only for startup of ‘ash’ shell variants - not the common sh or bash shells. – spechter Apr 19 '19 at 05:44
Can you provide an example of what should be set in ENV? – Saeed Neamati Jul 05 '21 at 12:16
@SaeedNeamati - Added in post. – spechter Jul 18 '21 at 03:01

score 0 · Answer 3 · edited Apr 21 '23 at 09:51

Some year after the question on alipline 3.17 I figured out a solution (may not be the best, any comment welcome).

Edit as root /etc/profile to add at the end just before the unset script this line:
```
. $HOME/.profile
```
Then create a .profile in your home dir as described before like this:
```
ENV=$HOME/.ashrc; export ENV
. $ENV
```

Then you can create a .ashrc in your home dir to set you aliases or other stuff.

Ash profile/configuration file

3 Answers3

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