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acme: use getuser() in fsinit()

--- a/sys/src/cmd/acme/fsys.c

+++ b/sys/src/cmd/acme/fsys.c

@@ -116,8 +116,6 @@

 fsysinit(void)

 {

 	int p[2];

-	int n, fd;

-	char buf[256];

 	if(pipe(p) < 0)

 		error("can't create pipe");

@@ -125,15 +123,7 @@

 	sfd = p[1];

 	fmtinstall('F', fcallfmt);

 	clockfd = open("/dev/time", OREAD|OCEXEC);

-	fd = open("/dev/user", OREAD);

-	if(fd >= 0){

-		n = read(fd, buf, sizeof buf-1);

-		if(n > 0){

-			buf[n] = 0;

-			user = estrdup(buf);

-		}

-		close(fd);

-	}

+	user = getuser();

 	proccreate(fsysproc, nil, STACK);

 }

-- 

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