1 files changed, 57 insertions, 0 deletions
diff --git a/gnu/system/shadow.scm b/gnu/system/shadow.scm
new file mode 100644
index 0000000000..71f8e0d771
--- /dev/null
+++ b/gnu/system/shadow.scm
@@ -0,0 +1,57 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix 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 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix 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 GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu system shadow)
+  #:use-module (guix store)
+  #:use-module (ice-9 match)
+  #:export (passwd-file))
+
+;;; Commentary:
+;;;
+;;; Utilities for configuring the Shadow tool suite ('login', 'passwd', etc.)
+;;;
+;;; Code:
+
+(define* (passwd-file store accounts #:key shadow?)
+  "Return a password file for ACCOUNTS, a list of vectors as returned by
+'getpwnam'.  If SHADOW? is true, then it is a /etc/shadow file, otherwise it
+is a /etc/passwd file."
+  ;; XXX: The resulting file is world-readable, so beware when SHADOW? is #t!
+  (define contents
+    (let loop ((accounts accounts)
+               (result   '()))
+      (match accounts
+        ((#(name pass uid gid comment home-dir shell) rest ...)
+         (loop rest
+               (cons (if shadow?
+                         (string-append name
+                                        ":"       ; XXX: use (crypt PASS …)?
+                                        ":::::::")
+                         (string-append name
+                                        ":" "x"
+                                        ":" (number->string uid)
+                                        ":" (number->string gid)
+                                        ":" comment ":" home-dir ":" shell))
+                     result)))
+        (()
+         (string-join (reverse result) "\n" 'suffix)))))
+
+  (add-text-to-store store (if shadow? "shadow" "passwd")
+                     contents '()))
+
+;;; shadow.scm ends here