20060303a

1 files changed, 46 insertions, 0 deletions

diff --git a/appl/lib/memfs.b b/appl/lib/memfs.b
new file mode 100644
index 00000000..4ffc7b65
--- /dev/null
+++ b/appl/lib/memfs.b
@@ -0,0 +1,46 @@
+# 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);
+}