commit 3a616eaa80070a1b89b907baacc8b603b02c670e
from: David du Colombier <0intro@gmail.com>
date: Fri Aug 03 19:12:10 2012 UTC

vacfs: fix create srv with ORCLOSE on plan 9

In the current code, the srv file is removed
just after the main thread exits, while the
srv thread is still running, which is not
the expected behavior.
We moved the srv creation just before the
procrfork, in order that the srv file will
not be removed until the srv thread exits.

R=rsc
http://codereview.appspot.com/6397047

commit - ac2662695a41207618873798914d70242b826a63
commit + 3a616eaa80070a1b89b907baacc8b603b02c670e
blob - c6609397cd16873289e17da4d76b131e196d4f92
blob + 643b6c46aba142a30d4e56edb68482a4d75198e5
--- src/cmd/vac/vacfs.c
+++ src/cmd/vac/vacfs.c
@@ -233,6 +233,17 @@ threadmain(int argc, char *argv[])
 		mfd[0] = p[0];
 		mfd[1] = p[0];
 		srvfd = p[1];
+#ifndef PLAN9PORT
+		if(defsrv){
+			srvname = smprint("/srv/%s", defsrv);
+			fd = create(srvname, OWRITE|ORCLOSE, 0666);
+			if(fd < 0)
+				sysfatal("create %s: %r", srvname);
+			if(fprint(fd, "%d", srvfd) < 0)
+				sysfatal("write %s: %r", srvname);
+			free(srvname);
+		}
+#endif
 	}
 
 #ifdef PLAN9PORT
@@ -245,15 +256,6 @@ threadmain(int argc, char *argv[])
 
 	if(!stdio){
 		close(p[0]);
-		if(defsrv){
-			srvname = smprint("/srv/%s", defsrv);
-			fd = create(srvname, OWRITE|ORCLOSE, 0666);
-			if(fd < 0)
-				sysfatal("create %s: %r", srvname);
-			if(fprint(fd, "%d", srvfd) < 0)
-				sysfatal("write %s: %r", srvname);
-			free(srvname);
-		}
 		if(defmnt){
 			if(mount(srvfd, -1, defmnt, MREPL|MCREATE, "") < 0)
 				sysfatal("mount %s: %r", defmnt);