distro: Add GNU lsh.

* distro/packages/lsh.scm,
  distro/packages/patches/lsh-guile-compat.patch:
  distro/packages/patches/lsh-no-root-login.patch:
  distro/packages/patches/lsh-pam-service-name.patch: New files.
* Makefile.am (MODULES): Add lsh.scm.
  (dist_patch_DATA): Add the above patches.

Makefile.am

@@ -67,6 +67,7 @@ MODULES =					\
   distro/packages/libunistring.scm		\
   distro/packages/linux.scm			\
   distro/packages/lout.scm			\
+  distro/packages/lsh.scm			\
   distro/packages/m4.scm			\
   distro/packages/make-bootstrap.scm		\
   distro/packages/multiprecision.scm		\
@@ -103,6 +104,9 @@ dist_patch_DATA =						\
   distro/packages/patches/guile-default-utf8.patch		\
   distro/packages/patches/guile-relocatable.patch		\
   distro/packages/patches/libtool-skip-tests.patch		\
+  distro/packages/patches/lsh-guile-compat.patch		\
+  distro/packages/patches/lsh-no-root-login.patch		\
+  distro/packages/patches/lsh-pam-service-name.patch		\
   distro/packages/patches/m4-gets-undeclared.patch		\
   distro/packages/patches/m4-readlink-EINVAL.patch		\
   distro/packages/patches/m4-s_isdir.patch			\

distro/packages/lsh.scm

@@ -0,0 +1,125 @@
+;;; Guix --- Nix package management from Guile.         -*- coding: utf-8 -*-
+;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of Guix.
+;;;
+;;; 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.
+;;;
+;;; 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 Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (distro packages lsh)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module (distro)
+  #:use-module (distro packages m4)
+  #:use-module (distro packages linux)
+  #:use-module (distro packages compression)
+  #:use-module (distro packages multiprecision)
+  #:use-module (distro packages readline)
+  #:use-module (distro packages gperf)
+  #:use-module (distro packages base))
+
+(define-public liboop
+  (package
+    (name "liboop")
+    (version "1.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (string-append "http://download.ofb.net/liboop/liboop-"
+                          version ".tar.gz"))
+      (sha256
+       (base32
+        "0z6rlalhvfca64jpvksppc9bdhs7jwhiw4y35g5ibvh91xp3rn1l"))))
+    (build-system gnu-build-system)
+    (home-page "http://liboop.ofb.net/")
+    (synopsis "`liboop', an event loop library")
+    (description "liboop is an event loop library.")
+    (license "LGPLv2.1+")))
+
+(define-public lsh
+  (package
+    (name "lsh")
+    (version "2.0.4")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (string-append "mirror://gnu/lsh/lsh-"
+                          version ".tar.gz"))
+      (sha256
+       (base32
+        "149hf49xcj99wwvi7hcb59igq4vpyv8har1br1if3lrsw5irsjv1"))))
+    (build-system gnu-build-system)
+    (inputs
+     `(("linux-pam" ,linux-pam)
+       ("m4" ,m4)
+       ("readline" ,readline)
+       ("liboop" ,liboop)
+       ("zlib" ,zlib)
+       ("gmp" ,gmp)
+       ("guile" ,guile-final)
+       ("gperf" ,gperf)
+       ("psmisc" ,psmisc)                         ; for `killall'
+
+       ("patch/no-root-login" ,(search-patch "lsh-no-root-login.patch"))
+       ("patch/guile-compat" ,(search-patch "lsh-guile-compat.patch"))
+       ("patch/pam-service-name"
+        ,(search-patch "lsh-pam-service-name.patch"))))
+    (arguments
+     '(#:patches (list (assoc-ref %build-inputs "patch/no-root-login")
+                       (assoc-ref %build-inputs "patch/pam-service-name")
+                       (assoc-ref %build-inputs "patch/guile-compat"))
+
+       ;; Skip the `configure' test that checks whether /dev/ptmx &
+       ;; co. work as expected, because it relies on impurities (for
+       ;; instance, /dev/pts may be unavailable in chroots.)
+       #:configure-flags '("lsh_cv_sys_unix98_ptys=yes")
+
+       ;; FIXME: Tests won't run in a chroot, presumably because
+       ;; /etc/profile is missing, and thus clients get an empty $PATH
+       ;; and nothing works.
+       #:tests? #f
+
+       #:phases
+       (alist-cons-before
+        'configure 'fix-test-suite
+        (lambda _
+          ;; Tests rely on $USER being set.
+          (setenv "USER" "guix")
+
+          (substitute* "src/testsuite/functions.sh"
+            (("localhost")
+             ;; Avoid host name lookups since they don't work in chroot
+             ;; builds.
+             "127.0.0.1")
+            (("set -e")
+             ;; Make tests more verbose.
+             "set -e\nset -x"))
+
+          (substitute* (find-files "src/testsuite" "-test$")
+            (("localhost") "127.0.0.1"))
+
+          (substitute* "src/testsuite/login-auth-test"
+            (("/bin/cat")
+             ;; Use the right path to `cat'.
+             (search-path (search-path-as-string->list (getenv "PATH"))
+                          "cat"))))
+        %standard-phases)))
+    (home-page "http://www.lysator.liu.se/~nisse/lsh/")
+    (synopsis
+     "GNU lsh, a GPL'd implementation of the SSH protocol")
+    (description
+     "lsh is a free implementation (in the GNU sense) of the ssh
+version 2 protocol, currently being standardised by the IETF
+SECSH working group.")
+    (license "GPLv2+")))

distro/packages/patches/lsh-guile-compat.patch

@@ -0,0 +1,9 @@
+Use (ice-9 rdelim) for `read-line'.
+
+--- lsh-2.0.4/src/scm/guile-compat.scm	2012-12-03 23:28:01.000000000 +0100
++++ lsh-2.0.4/src/scm/guile-compat.scm	2012-12-03 23:28:04.000000000 +0100
+@@ -21,3 +21,4 @@
+ ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ 
+ (use-syntax (ice-9 syncase))
++(use-modules (ice-9 rdelim))

distro/packages/patches/lsh-no-root-login.patch

@@ -0,0 +1,16 @@
+Correctly handle the `--no-root-login' option.
+
+--- lsh-2.0.4/src/lshd.c	2006-05-01 13:47:44.000000000 +0200
++++ lsh-2.0.4/src/lshd.c	2009-09-08 12:20:36.000000000 +0200
+@@ -758,6 +758,10 @@ main_argp_parser(int key, char *arg, str
+       self->allow_root = 1;
+       break;
+ 
++    case OPT_NO_ROOT_LOGIN:
++      self->allow_root = 0;
++      break;
++
+     case OPT_KERBEROS_PASSWD:
+       self->pw_helper = PATH_KERBEROS_HELPER;
+       break;
+

distro/packages/patches/lsh-pam-service-name.patch

@@ -0,0 +1,14 @@
+Tell `lsh-pam-checkpw', the PAM password helper program, to use a more
+descriptive service name.
+
+--- lsh-2.0.4/src/lsh-pam-checkpw.c	2003-02-16 22:30:10.000000000 +0100
++++ lsh-2.0.4/src/lsh-pam-checkpw.c	2008-11-28 16:16:58.000000000 +0100
+@@ -38,7 +38,7 @@
+ #include <security/pam_appl.h>
+ 
+ #define PWD_MAXLEN 1024
+-#define SERVICE_NAME "other"
++#define SERVICE_NAME "lshd"
+ #define TIMEOUT 600 
+ 
+ static int