remove runit/runit_lib.c

function                                             old     new   delta
runsv_main                                          1770    1786     +16
svstatus_get                                         176     188     +12
sv_main                                             1180    1186      +6
runsvdir_main                                        683     689      +6
processorstart                                       385     391      +6
control                                              126     132      +6
logdir_open                                         1184    1187      +3
lock_exnb                                             14       -     -14
lock_ex                                               14       -     -14
open_write                                            17       -     -17
open_read                                             17       -     -17
------------------------------------------------------------------------------
(add/remove: 0/5 grow/shrink: 7/0 up/down: 55/-62)             Total: -7 bytes

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/runit/runsv.c b/runit/runsv.c
index 6bb6ec8..ebb0318 100644
--- a/runit/runsv.c
+++ b/runit/runsv.c
@@ -524,7 +524,7 @@
 	}
 	svd[0].fdlock = xopen3("log/supervise/lock"+4,
 			O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
-	if (lock_exnb(svd[0].fdlock) == -1)
+	if (flock(svd[0].fdlock, LOCK_EX | LOCK_NB) == -1)
 		fatal_cannot("lock supervise/lock");
 	close_on_exec_on(svd[0].fdlock);
 	if (haslog) {
@@ -548,7 +548,7 @@
 		}
 		svd[1].fdlock = xopen3("log/supervise/lock",
 				O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
-		if (lock_ex(svd[1].fdlock) == -1)
+		if (flock(svd[1].fdlock, LOCK_EX) == -1)
 			fatal_cannot("lock log/supervise/lock");
 		close_on_exec_on(svd[1].fdlock);
 	}
@@ -618,7 +618,7 @@
 				pidchanged = 1;
 				svd[0].ctrl &= ~C_TERM;
 				if (svd[0].state != S_FINISH) {
-					fd = open_read("finish");
+					fd = open("finish", O_RDONLY|O_NDELAY);
 					if (fd != -1) {
 						close(fd);
 						svd[0].state = S_FINISH;