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-rw-r--r--nss/valid_field.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/nss/valid_field.c b/nss/valid_field.c
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index 0000000000..5fcddc50ae
--- /dev/null
+++ b/nss/valid_field.c
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+/* Copyright (C) 2015 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <nss.h>
+#include <string.h>
+
+const char __nss_invalid_field_characters[] = NSS_INVALID_FIELD_CHARACTERS;
+
+/* Check that VALUE is either NULL or a NUL-terminated string which
+ does not contain characters not permitted in NSS database
+ fields. */
+_Bool
+__nss_valid_field (const char *value)
+{
+ return value == NULL
+ || strpbrk (value, __nss_invalid_field_characters) == NULL;
+}