>Solaris 5.10 Generic_141445-09 i86pc
>
>I am playing around with a kernel module, learning some of the inner workings
>of the kernel, and I
would like to have a look at a process' environment.
>
>I am confused by the definition in user_t for environment:
>
> uintptr_t u_envp;
>
>.. since I am more used to seeing "char **" in userland.
>
>How can I use this? Is this a pointer into the process's stack which
>the environment pointer-list?
It is the pointer into the user stack where the kernel copied the
environment when the process started.
>
>If I use something like (curthread)->t_procp->p_user.u_envp to locate it,
>should I first use copyin() on "u_envp" ?
Yep.
>This simply incur GP panic:
>
> if ( (curthread)->t_procp->p_user.u_envp ) {
> char **ep = NULL;
> if (!copyin((curthread)->t_procp->p_user.u_envp,
> &env, sizeof(env))) {
>
> cmn_err(CE_NOTE, "env is '%s'\n",env[0]);
>
>
>Thanks.
>
>ps. Is it required to check for NULL on 'curthread', 't_procp', 'p_user'
>generally? Should I?
No.
What exactly are trying to do?
Casper
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