1 files changed, 61 insertions, 0 deletions
diff --git a/lib/getlogin_r.c b/lib/getlogin_r.c
new file mode 100644
index 0000000..b9b76c6
--- /dev/null
+++ b/lib/getlogin_r.c
@@ -0,0 +1,61 @@
+/* Provide a working getlogin_r for systems which lack it.
+
+   Copyright (C) 2005 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* written by Paul Eggert and Derek Price */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "getlogin_r.h"
+
+#include <errno.h>
+#include <string.h>
+
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#if !HAVE_DECL_GETLOGIN
+char *getlogin (void);
+#endif
+
+/* See getlogin_r.h for documentation.  */
+int
+getlogin_r (char *name, size_t size)
+{
+  char *n;
+  size_t nlen;
+
+  errno = 0;
+  n = getlogin ();
+
+  /* A system function like getlogin_r is never supposed to set errno
+     to zero, so make sure errno is nonzero here.  ENOENT is a
+     reasonable errno value if getlogin returns NULL.  */
+  if (!errno)
+    errno = ENOENT;
+
+  if (!n)
+    return errno;
+  nlen = strlen (n);
+  if (size <= nlen)
+    return ERANGE;
+  memcpy (name, n, nlen + 1);
+  return 0;
+}