PS1 environment variable

I see in hush.c some code to set the prompt from the PS1 environment variable, but I can't find any documentation on this feature, nor can I figure out how to make it work. Can someone tell me how?

Timur Tabi
Linux Kernel Developer @ Freescale

If you had a look at the code, you should notice that all relevant parts of the code are between "#ifndef __U_BOOT__" ... "#endif" pairs.

In other words, this is not available in U-Boot.

Best regards,

Wolfgang Denk

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
The more we disagree, the more chance there is that at least  one  of
us is right.

Why is there U-Boot code that is not available in U-Boot?

(and for the record, I did look at the code and I did notice that, and I found that #ifdef so odd I figured I'd better ask).

Timur Tabi
Linux Kernel Developer @ Freescale

It's not U-Bot code, it's hush code. We "imported" the hus shell from BusyBox, and to keep it in sync with any changes or improvements done in BusyBox' version it is a Good Idea (TM) to change the file only to the minimum extend needed to make it work.

It's not odd at all. Actually it's even kind of documented as item 2
of the Coding Style document: "Source files originating from
different projects (for example the MTD subsystem or the hush shell code from the BusyBox project) may, after careful consideration, be exempted from these rules. For such files, the original coding style may be kept to ease subsequent migration to newer versions of those sources."

Best regards,

Wolfgang Denk

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Everyting looks interesting until you do it. Then you find it's  just
another job.                     - Terry Pratchett, _Moving Pictures_

Ok. Would you accept a patch that enabled this particular feature?

We have lots of machines in our lab, and I frequently have multiple terminal windows open. I sometimes can't tell which machine I'm logged into. Being able to specify a prompt in an environment variable would solve that problem for me.

Yes, of course. You might find that this is not a trivial thing to add. The concept variables and the relations of U-Boot envrionment variables, shell variables, and shell environment variables is a bit tricky.

Best regards,

Wolfgang Denk

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
If it went on at this rate, in several billion  years  he'd  be  rich
beyond his wildest dreams!            - Terry Pratchett, _Soul Music_