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alarm: make alarm work for processes running as none

--- a/sys/src/cmd/alarm.c

+++ b/sys/src/cmd/alarm.c

@@ -24,8 +24,6 @@

 #include <u.h>

 #include <libc.h>

-int cpid;

-

 void

 usage(void)

 {

@@ -36,7 +34,7 @@

 static void

 catch(void *, char *msg)

 {

- 	postnote(PNGROUP, cpid, msg);

+	postnote(PNGROUP, getpid(), msg);

 	noted(NDFLT);

 }

@@ -71,7 +69,8 @@

 		}

 		t += n;

 	}

-	switch((cpid = rfork(RFFDG|RFREND|RFPROC|RFMEM|RFNOTEG))){

+	rfork(RFNOTEG);

+	switch(rfork(RFFDG|RFREND|RFPROC|RFMEM)){

 	case -1:

 		sysfatal("%r");

 	case 0: /* child */

-- 

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