On Wed, Apr 25, 2001 at 06:32:29AM +1000, David wrote:
>
> and a dumb extension to this question.. where are they stored?
>
> On Wed, 25 Apr 2001, Jeff Waugh wrote:
>
> > <quote who="Craig">
> >
> > > Simple question, but one I can't find the answer to.
> > >
> > > How do you set an Enviromental Variable in bash?
> >
> > export VARIABLE=poo
Well, from the behavior, consider:
$ FOO=foo BAR=bar
$ export BAR
$ echo $FOO $BAR
foo bar
$ bash -c 'echo $FOO $BAR'
bar
$ FOO=`pwd` bash -c 'echo $FOO $BAR'
/home/pmc bar
The prototype of a program's main:
extern int main(int argc, char **argv, char **argp); /* something like that */
glibc's setenv/etc operations work on a variable called '__environ'
(defined in glibc/sysdeps/generic/environ.c), obviously weak aliased
to 'environ'. More info about 'weak' aliases can be found in your
gcc manual, look for the gnu c '__attribute__' extension (or find
out more in your linker docs).
Anyhow,
Paul.
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