Simplified and cleaned up the radiusclient implementation, and

[ppp.git] / pppd / plugins / radius / lock.c

diff --git a/pppd/plugins/radius/lock.c b/pppd/plugins/radius/lock.c
new file mode 100644 (file)
index 0000000..482e97c
--- /dev/null
+++ b/pppd/plugins/radius/lock.c
@@ -0,0 +1,46 @@
+/*
+ * $Id: lock.c,v 1.1 2004/11/14 07:26:26 paulus Exp $
+ *
+ * Copyright (C) 1997 Lars Fenneberg
+ *
+ * See the file COPYRIGHT for the respective terms and conditions.
+ * If the file is missing contact me at lf@elemental.net
+ * and I'll send you a copy.
+ *
+ */
+
+#include "includes.h"
+#include <unistd.h>
+#include <fcntl.h>
+
+int do_lock_exclusive(int fd)
+{
+       struct flock fl;
+       int res;
+
+       memset((void *)&fl, 0, sizeof(fl));
+
+       fl.l_type = F_WRLCK;
+       fl.l_whence = fl.l_start = 0;
+       fl.l_len = 0; /* 0 means "to end of file" */
+
+       res = fcntl(fd, F_SETLK, &fl);
+
+       if ((res == -1) && (errno == EAGAIN))
+               errno = EWOULDBLOCK;
+
+       return res;
+}
+
+int do_unlock(int fd)
+{
+       struct flock fl;
+
+       memset((void *)&fl, 0, sizeof(fl));
+
+       fl.l_type = F_UNLCK;
+       fl.l_whence = fl.l_start = 0;
+       fl.l_len = 0; /* 0 means "to end of file" */
+
+       return fcntl(fd, F_SETLK, &fl);
+}