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-rw-r--r--src/cmd/upas/common/libsys.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/cmd/upas/common/libsys.c b/src/cmd/upas/common/libsys.c
index ced00033..8e55fc4d 100644
--- a/src/cmd/upas/common/libsys.c
+++ b/src/cmd/upas/common/libsys.c
@@ -278,6 +278,7 @@ sysopen(char *path, char *mode, ulong perm)
break;
case 'l':
sysperm |= DMEXCL;
+ sysmode |= OLOCK;
break;
case 'a':
sysperm |= DMAPPEND;