[9fans] writing services

[9fans] writing services

[Sergey Reva]

Hello Fans

I already understand how work srv (in most part) but have some
question

first is...

My file tree initialized by following strings

mysrv.tree=alloctree(nil,nil,DMDIR|0777,destroyfile);
createfile(mysrv.tree->root,"data",nil,0666,(void*)DATAFILE);
(I use aux pointer for file identification in tree)

How I can set file size, and when I need realloc data pointer?
I try set it in open and/or stat function but it's not work...
In my case I need create fixed size file, and then work with it.

Thanks for advice
-- 
http://rs-rlab.narod.ru                          mailto:rs_rlab@mail.ru

Re: [9fans] writing services

[Russ Cox]

> mysrv.tree=alloctree(nil,nil,DMDIR|0777,destroyfile);
> createfile(mysrv.tree->root,"data",nil,0666,(void*)DATAFILE);

> How I can set file size, and when I need realloc data pointer?
> I try set it in open and/or stat function but it's not work...
> In my case I need create fixed size file, and then work with it.

If you create a stat function, then you can do

void
mystat(Req *r)
{
    r->d->length = 1000000;
    respond(r, nil);
}

The data pointer f->aux is yours.  You can do whatever you want with it.

Russ