4 files changed, 7 insertions(+), 5 deletions(-)

M port/devcons.c
M port/devroot.c
M port/devsrv.c
M port/fault.c

@@ 448,9 448,6 @@ consopen(Chan *c, int omode)
 			error(Eperm);
 		incref(&ctl);
 		break;
-	case Qswap:
-		kickpager();		/* start a pager if not already started */
-		break;
 	}
 	c->aux = 0;
 	return devopen(c, omode, consdir, NCONS, devgen);


@@ 850,6 847,7 @@ conswrite(Chan *c, void *va, long n, ulong offset)
 		break;
 
 	case Qswap:
+		kickpager();		/* start a pager if not already started */
 		if(conf.cntrlp && strcmp(u->p->user, eve) != 0)
 			error(Eperm);
 		if(n >= sizeof buf)

@@ 95,7 95,7 @@ rootwalk(Chan *c, char *name)
 		return 1;
 	}
 	if((c->qid.path & ~CHDIR) != Qdir)
-		error(Enonexist);
+		return 0;
 	return devwalk(c, name, rootdir, nroot, rootgen);
 }
 

@@ 199,9 199,14 @@ srvwrite(Chan *c, void *va, long n, ulong offset)
 	fd = strtoul(buf, 0, 0);
 	f = u->p->fgrp;
 	lock(f);
+	if(waserror()){
+		unlock(f);
+		nexterror();
+	}
 	fdtochan(fd, -1, 0);	/* error check only */
 	srv[i].chan = f->fd[fd];
 	incref(srv[i].chan);
 	unlock(f);
+	poperror();
 	return n;
 }

@@ 280,7 280,6 @@ validaddr(ulong addr, ulong len, int write)
 	}
 
 	pprint("invalid address 0x%lux in sys call pc=0x%lux", addr, userpc());
-	postnote(u->p, 1, "sys: bad address", NDebug);
 	error(Ebadarg);
 }