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# To be removed...
# functionality has been moved to appl/cmd/memfs.b
# some progs still refer to lib/memfs so it remains for the time being
implement MemFS;
include "sys.m";
sys: Sys;
include "draw.m";
include "memfs.m";
Cmd: module {
PATH: con "/dis/memfs.dis";
init: fn(ctxt: ref Draw->Context, argv: list of string);
};
cmd: Cmd;
init(): string
{
sys = load Sys Sys->PATH;
cmd = load Cmd Cmd->PATH;
if (cmd == nil)
return sys->sprint("lib/memfs cannot load %s: %r\n", Cmd->PATH);
return nil;
}
newfs(maxsz: int): ref Sys->FD
{
p := array [2] of ref Sys->FD;
if (sys->pipe(p) == -1)
return nil;
sync := chan of int;
spawn run(p[1].fd, maxsz, sync);
<- sync;
return p[0];
}
run(fd: int, sz: int, sync: chan of int)
{
sys->pctl(Sys->FORKFD, nil);
sys->dup(fd, 0);
sys->pctl(Sys->NEWFD, 0::1::2::nil);
sync <-= 1;
cmd->init(nil, Cmd->PATH :: "-s" :: "-m" :: string sz :: nil);
}
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