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implement Fsmodule;
include "sys.m";
sys: Sys;
include "draw.m";
include "sh.m";
include "fslib.m";
fslib: Fslib;
Report, Value, quit, report: import fslib;
Fschan, Fsdata, Entrychan, Entry,
Gatechan, Gatequery, Option,
Next, Down, Skip, Quit: import Fslib;
types(): string
{
return "vsx";
}
init()
{
sys = load Sys Sys->PATH;
fslib = load Fslib Fslib->PATH;
if(fslib == nil){
sys->fprint(sys->fildes(2), "fs: write: cannot load %s: %r\n", Fslib->PATH);
raise "fail:bad module";
}
}
run(nil: ref Draw->Context, report: ref Report,
nil: list of Option, args: list of ref Value): ref Value
{
sync := chan of int;
spawn fswriteproc(sync, (hd args).s().i, (hd tl args).x().i, report.start("fswrite"));
<-sync;
return ref Value.V(sync);
}
fswriteproc(sync: chan of int, root: string, c: Fschan, errorc: chan of string)
{
sys->pctl(Sys->FORKNS, nil);
sync <-= 1;
if(<-sync == 0){
(<-c).t1 <-= Quit;
quit(errorc);
}
(d, reply) := <-c;
if(root != nil){
d.dir = ref *d.dir;
d.dir.name = root;
}
fswritedir(d.dir.name, d, reply, c, errorc);
quit(errorc);
}
fswritedir(path: string, d: Fsdata, dreply: chan of int, c: Fschan, errorc: chan of string)
{
fd: ref Sys->FD;
if(d.dir.mode & Sys->DMDIR){
fd = sys->create(d.dir.name, Sys->OREAD, d.dir.mode|8r300);
if(fd == nil && (fd = sys->open(d.dir.name, Sys->OREAD)) == nil){
dreply <-= Next;
report(errorc, sys->sprint("cannot create %q, mode %uo: %r", path, d.dir.mode|8r300));
return;
}
if(sys->chdir(d.dir.name) == -1){ # XXX beware of names starting with '#'
dreply <-= Next;
report(errorc, sys->sprint("cannot cd to %q: %r", path));
fd = nil;
sys->remove(d.dir.name);
return;
}
dreply <-= Down;
path[len path] = '/';
for(;;){
(ent, reply) := <-c;
if(ent.dir == nil){
reply <-= Next;
break;
}
fswritedir(path + ent.dir.name, ent, reply, c, errorc);
}
sys->chdir("..");
if((d.dir.mode & 8r300) != 8r300){
ws := Sys->nulldir;
ws.mode = d.dir.mode;
if(sys->fwstat(fd, ws) == -1)
report(errorc, sys->sprint("cannot wstat %q: %r", path));
}
}else{
fd = sys->create(d.dir.name, Sys->OWRITE, d.dir.mode);
if(fd == nil){
dreply <-= Next;
report(errorc, sys->sprint("cannot create %q, mode %uo: %r", path, d.dir.mode|8r300));
return;
}
dreply <-= Down;
while((((nil, buf), reply) := <-c).t0.data != nil){
nw := sys->write(fd, buf, len buf);
if(nw < len buf){
if(nw == -1)
errorc <-= sys->sprint("error writing %q: %r", path);
else
errorc <-= sys->sprint("short write");
reply <-= Skip;
break;
}
reply <-= Next;
}
reply <-= Next;
}
}
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