1 files changed, 45 insertions, 0 deletions
diff --git a/liblock/locklockf.c b/liblock/locklockf.c
new file mode 100644
index 0000000..63c0a98
--- /dev/null
+++ b/liblock/locklockf.c
@@ -0,0 +1,45 @@
+/*
+** Copyright 1998 - 1999 Double Precision, Inc.  See COPYING for
+** distribution information.
+*/
+
+
+#if	HAVE_CONFIG_H
+#include	"config.h"
+#endif
+#include	<sys/types.h>
+#if	HAVE_FCNTL_H
+#include	<fcntl.h>
+#endif
+#if	HAVE_SYS_FCNTL_H
+#include	<sys/fcntl.h>
+#endif
+#if	HAVE_UNISTD_H
+#include	<unistd.h>
+#endif
+#if	HAVE_ERRNO_H
+#include	<errno.h>
+#endif
+#include	"liblock.h"
+
+int	ll_lockfd(int fd, int ltype, LL_OFFSET_TYPE start, LL_OFFSET_TYPE len)
+{
+off_t	p;
+
+	if (ltype & ll_whence_curpos)
+		p=lseek(fd, start, SEEK_CUR);
+	else if (ltype && ll_whence_end)
+		p=lseek(fd, start, SEEK_END);
+	else	p=lseek(fd, start, SEEK_SET);
+
+	if (p < 0)	return (-1);
+
+	if (lockf(fd, ltype & ll_unlock ? F_ULOCK:
+		ltype & ll_wait ? F_LOCK:F_TLOCK, len))
+	{
+		lseek(fd, p, SEEK_SET);
+		return (-1);
+	}
+	lseek(fd, SEEK_SET, p);
+	return (0);
+}