l i n u x - u s e r s - g r o u p - o f - d a v i s
Next Meeting:
July 7: Social gathering
Next Installfest:
Latest News:
Jun. 14: June LUGOD meeting cancelled
Page last updated:
2001 Dec 30 17:14

The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox-tech] Bash script to setup environment variables
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox-tech] Bash script to setup environment variables

Hmm... can you think of any other ways?

I'm trying to run a script, not a C program.  Also, I don't know about
Unix but under DOS putenv() doesn't affect the parent program that called
the C program (it affects only itself and the children.)


On Thu, 27 Dec 2001, Henry House wrote:

> On Thu, Dec 27, 2001 at 11:12:35PM -0800, Mark K. Kim wrote:
> > Keywords: bash, script, environment variables
> >
> > I'm doing some cross-compilation work so I need to flip environment
> > variables on/off in a heartbeat.  I tried to write a script, but scripts
> > run on sub-processes so the changes do not take effect on the parent
> > process.  Is there a way, without having to type `source script` or `.
> > script`, to make environment variables changes take place on the running
> > process?
> Would putenv(3) work? To quote the manual:
> 		 putenv - change or add an environment variable
> 		 #include <stdlib.h>
> 		 int putenv(char *string);
> 		 The  putenv()  function  adds  or  changes the value of environment variables.  The
> 		 argument string is of the form name=value.  If name does not already exist  in  the
> 		 environment, then string is added to the environment.  If name does exist, then the
> 		 value of name in the environment is changed to value.  The  string  pointed  to  by
> 		 string becomes part of the environment, so altering the string changes the environ­
> 		 ment.
> --
> Henry House
> The attached file is a digital signature. See <http://romana.hajhouse.org/pgp>
> for information.  My OpenPGP key: <http://romana.hajhouse.org/hajhouse.asc>.

Mark K. Kim
PGP key available upon request.

vox-tech mailing list

LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
Appahost Applications
For a significant contribution towards our projector, and a generous donation to allow us to continue meeting at the Davis Library.