check that old data exists when it is necessary

[pam_pcsc_cr.git] / pcsc_cr.c

diff --git a/pcsc_cr.c b/pcsc_cr.c
index 48c79f8443e29a8942f7469409f6e8a96eb98acf..7f2ccffb6bb2c863112c3aa3fe95ee610669411e 100644 (file)
--- a/pcsc_cr.c
+++ b/pcsc_cr.c
@@ -1,3 +1,26 @@
+/*
+Copyright (c) 2013 Eugene Crosser
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must
+    not claim that you wrote the original software. If you use this
+    software in a product, an acknowledgment in the product documentation
+    would be appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must
+    not be misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution.
+*/
+
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
@@ -109,7 +132,7 @@ free_out:
        return rc;
 }
 
-char *pcsc_errstr(long err) {
+const char *pcsc_errstr(long err) {
        return pcsc_stringify_error(err);
 }