1 files changed, 41 insertions, 0 deletions
diff --git a/lib/xgetgrgid.c b/lib/xgetgrgid.c
new file mode 100644
index 0000000..6419196
--- /dev/null
+++ b/lib/xgetgrgid.c
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * According to the Linux-PAM documentation:
+ *
+ *  4.1. Care about standard library calls
+ *
+ *  In general, writers of authorization-granting applications should
+ *  assume that each module is likely to call any or all 'libc' functions.
+ *  For 'libc' functions that return pointers to static/dynamically
+ *  allocated structures (ie.  the library allocates the memory and the
+ *  user is not expected to 'free()' it) any module call to this function
+ *  is likely to corrupt a pointer previously obtained by the application.
+ *  The application programmer should either re-call such a 'libc'
+ *  function after a call to the Linux-PAM library, or copy the structure
+ *  contents to some safe area of memory before passing control to the
+ *  Linux-PAM library.
+ *
+ *  Two important function classes that fall into this category are
+ *  getpwnam(3) and syslog(3).
+ *
+ * This file provides wrapper to the getgrgid or getgrgid_r functions.
+ */
+
+#include <config.h>
+
+#include "groupio.h"
+
+#define LOOKUP_TYPE	struct group
+#define FUNCTION_NAME	getgrgid
+#define ARG_TYPE	gid_t
+#define ARG_NAME	gid
+#define DUP_FUNCTION	__gr_dup
+#define HAVE_FUNCTION_R 1
+
+#include "xgetXXbyYY.c"
+