1 files changed, 46 insertions, 0 deletions
diff --git a/sysdeps/posix/cuserid.c b/sysdeps/posix/cuserid.c
new file mode 100644
index 0000000000..b874e909ce
--- /dev/null
+++ b/sysdeps/posix/cuserid.c
@@ -0,0 +1,46 @@
+/* Copyright (C) 1991 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <stdio.h>
+#include <string.h>
+#include <pwd.h>
+
+extern int EXFUN(geteuid, (NOARGS));
+
+
+/* Return the username of the caller.
+   If S is not NULL, it points to a buffer of at least L_cuserid bytes
+   into which the name is copied; otherwise, a static buffer is used.  */
+char *
+DEFUN(cuserid, (s), char *s)
+{
+  static char name[L_cuserid];
+  struct passwd *pwent = getpwuid(geteuid());
+
+  if (pwent == NULL)
+    {
+      if (s != NULL)
+	s[0] = '\0';
+      return NULL;
+    }
+
+  if (s == NULL)
+    s = name;
+  return strcpy(s, pwent->pw_name);
+}