Pipes cannot use SOCK_DGRAM. Back to SOCK_STREAM.

Add debugging to fdwait.

Rewrite getcallerpc on PowerMac to be correct.

src/cmd/9pserve.c

@@ -167,7 +167,7 @@ threadmain(int argc, char **argv)
 void
 mainproc(void *v)
 {
-	int n;
+	int n, nn;
 	Fcall f;
 	USED(v);
 
@@ -186,8 +186,10 @@ mainproc(void *v)
 	f.tag = NOTAG;
 	n = convS2M(&f, vbuf, sizeof vbuf);
 	if(verbose > 1) fprint(2, "* <- %F\n", &f);
-	write(1, vbuf, n);
-	n = read9pmsg(0, vbuf, sizeof vbuf);
+	nn = write(1, vbuf, n);
+	if(n != nn)
+		sysfatal("error writing Tversion: %r\n");
+	n = threadread9pmsg(0, vbuf, sizeof vbuf);
 	if(convM2S(vbuf, n, &f) != n)
 		sysfatal("convM2S failure");
 	if(f.msize < msize)

src/cmd/acme/acme.c

@@ -63,8 +63,6 @@ threadmain(int argc, char *argv[])
 	int ncol;
 	Display *d;
 
-extern int _threaddebuglevel;
-_threaddebuglevel = ~0;
 	rfork(RFENVG|RFNAMEG);
 
 	ncol = -1;

src/cmd/plumb/rules.c

@@ -127,7 +127,7 @@ popinput(void)
 	return 1;
 }
 
-int
+static int
 getc(void)
 {
 	if(input == nil)