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-rw-r--r--usr/src/ucbhead/sys/file.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/usr/src/ucbhead/sys/file.h b/usr/src/ucbhead/sys/file.h
index 10863380dd..152141fcd7 100644
--- a/usr/src/ucbhead/sys/file.h
+++ b/usr/src/ucbhead/sys/file.h
@@ -77,6 +77,10 @@ typedef struct file
#include <sys/fcntl.h>
#endif
+#if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
+int flock(int, int);
+#endif
+
/* flags - see also fcntl.h */
#ifndef FOPEN