commit c71af67adc9946fe2a560259f5e79174dfa07e8d
author rsc <devnull@localhost> Fri Jan 07 07:19:35 2005 +0000
committer rsc <devnull@localhost> Fri Jan 07 07:19:35 2005 +0000
tree cc0131160eac4270c33edf9fcefadfe18af0944f
parent 9e863cf5617925a7f7e855207e56f94fc72a662e

do not depend on flock

src/lib9/open.c

diff --git a/src/lib9/open.c b/src/lib9/open.c
index 526b2a9..896ca52 100644
--- a/src/lib9/open.c
+++ b/src/lib9/open.c
@@ -12,6 +12,7 @@
 {
 	int cexec, rclose;
 	int fd, umode, lock, rdwr;
+	struct flock fl;
 
 	rdwr = mode&3;
 	umode = rdwr;
@@ -34,7 +35,11 @@
 	fd = open(name, umode);
 	if(fd >= 0){
 		if(lock){
-			if(flock(fd, (rdwr==OREAD) ? LOCK_SH : LOCK_EX) < 0){
+			fl.l_type = (rdwr==OREAD) ? F_RDLCK : F_WRLCK;
+			fl.l_whence = SEEK_SET;
+			fl.l_start = 0;
+			fl.l_len = 0;
+			if(fcntl(fd, F_SETLK, &fl) < 0){
 				close(fd);
 				return -1;
 			}