1291 static int ctlfd = -1;  variable
1327 	if ((ctlfd = open("/proc/self/ctl", O_WRONLY)) < 0 ||  in init_watch()
1328 	    fstat(ctlfd, &ctlstatb) != 0) {  in init_watch()
1329 		if (ctlfd >= 0)  in init_watch()
1330 			(void) close(ctlfd);  in init_watch()
1331 		ctlfd = -1;  in init_watch()
1336 	(void) fcntl(ctlfd, F_SETFD, 1);  in init_watch()
1359 		(void) write(ctlfd, &ctl, sizeof (ctl));  in init_watch()
1370 	if (ctlfd < 0)	/* first time */  in nowatch()
1372 	else if (fstat(ctlfd, &statb) != 0 ||  in nowatch()
1379 		if ((ctlfd = open("/proc/self/ctl", O_WRONLY)) < 0 ||  in nowatch()
1380 		    fstat(ctlfd, &ctlstatb) != 0) {  in nowatch()
1381 			if (ctlfd >= 0)  in nowatch()
1382 				(void) close(ctlfd);  in nowatch()
1383 			ctlfd = -1;  in nowatch()
1388 		(void) fcntl(ctlfd, F_SETFD, 1);  in nowatch()
1397 		(void) close(ctlfd);  in nowatch()
1398 		ctlfd = -1;  in nowatch()
1424 	(void) write(ctlfd, &ctl, sizeof (ctl));  in protect()
1441 	(void) write(ctlfd, &ctl, sizeof (ctl));  in unprotect()