Added RADIUS suppport.

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

diff --git a/pppd/plugins/radius/radiusclient/lib/lock.c b/pppd/plugins/radius/radiusclient/lib/lock.c
new file mode 100644 (file)
index 0000000..f78c592
--- /dev/null
+++ b/pppd/plugins/radius/radiusclient/lib/lock.c
@@ -0,0 +1,64 @@
+/*
+ * $Id: lock.c,v 1.1 2002/01/22 16:03:02 dfs 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 "config.h"
+#include "includes.h"
+
+#if defined(HAVE_FLOCK)
+
+int do_lock_exclusive(int fd)
+{
+       return flock(fd, LOCK_EX|LOCK_NB);
+}
+
+int do_unlock(int fd)
+{
+       return flock(fd, LOCK_UN);
+}
+
+#elif defined(HAVE_FCNTL)
+
+int do_lock_exclusive(int fd)
+{
+       flock_t 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)
+{
+       flock_t 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);
+}
+
+#else
+YOU_LOOSE "need either flock(2) or fcntl(2)"
+#endif
+