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hjfs: set group of new files to that of the parent directory (thanks umbraticus)

--- a/sys/src/cmd/hjfs/fs2.c

+++ b/sys/src/cmd/hjfs/fs2.c

@@ -108,6 +108,7 @@

 	int isdir;

 	Loc *l;

 	FLoc f;

+	short pgid;

 	b = nil;

 	l = nil;

@@ -150,6 +151,7 @@

 	l = getloc(ch->fs, f, ch->loc);

 	modified(ch, d);

 	b->op |= BDELWRI;

+	pgid = d->gid;

 	putbuf(b);

 	b = nil;

 	if(willmodify(ch->fs, l, ch->flags & CHFNOLOCK) < 0)

@@ -164,7 +166,8 @@

 	strcpy(d->name, name);

 	d->mtime = time(0);

 	d->atime = d->mtime;

-	d->gid = d->uid = d->muid = ch->uid;

+	d->gid = pgid;

+	d->uid = d->muid = ch->uid;

 	d->mode = DALLOC | perm & 0777;

 	if((d->type & QTEXCL) != 0){

 		qlock(&ch->loc->ex);

-- 

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