Merge branch 'master' into core-updates

3 files changed, 47 insertions, 3 deletions

diff --git a/gnu/system/install.scm b/gnu/system/install.scm
index 0cfc8fa5c9..b380716b69 100644
--- a/gnu/system/install.scm
+++ b/gnu/system/install.scm
@@ -237,7 +237,12 @@ the user's target storage device rather than on the RAM disk."
   ;; Minimal in-memory caching policy for nscd.
   (list (nscd-cache (database 'hosts)
                     (positive-time-to-live (* 3600 12))
-                    (negative-time-to-live 20)
+
+                    ;; Do not cache lookup failures at all since they are
+                    ;; quite likely (for instance when someone tries to ping a
+                    ;; host before networking is functional.)
+                    (negative-time-to-live 0)
+
                     (persistent? #f)
                     (max-database-size (* 5 (expt 2 20)))))) ;5 MiB
 
@@ -365,6 +370,7 @@ Use Alt-F2 for documentation.
                      parted ddrescue
                      grub                  ;mostly so xrefs to its manual work
                      cryptsetup
+                     btrfs-progs
                      wireless-tools iw wpa-supplicant-minimal iproute
                      ;; XXX: We used to have GNU fdisk here, but as of version
                      ;; 2.0.0a, that pulls Guile 1.8, which takes unreasonable
diff --git a/gnu/system/locale.scm b/gnu/system/locale.scm
index e798827a01..f9d713e0cf 100644
--- a/gnu/system/locale.scm
+++ b/gnu/system/locale.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -33,6 +33,7 @@
             locale-definition-source
             locale-definition-charset
 
+            locale-name->definition
             locale-directory
 
             %default-locale-libcs
@@ -52,6 +53,35 @@
   (charset locale-definition-charset              ;string--e.g., "UTF-8"
            (default "UTF-8")))
 
+(define %not-dot
+  (char-set-complement (char-set #\.)))
+
+(define (denormalize-codeset codeset)
+  "Attempt to guess the \"real\" name of CODESET, a normalized codeset as
+defined in (info \"(libc) Using gettextized software\")."
+  (cond ((string=? codeset "utf8")
+         "UTF-8")
+        ((string-prefix? "iso8859" codeset)
+         (string-append "ISO-8859-" (string-drop codeset 7)))
+        ((string=? codeset "eucjp")
+         "EUC-JP")
+        (else                                ;cross fingers, hope for the best
+         codeset)))
+
+(define (locale-name->definition name)
+  "Return a <locale-definition> corresponding to NAME, guessing the charset,
+or #f on failure."
+  (match (string-tokenize name %not-dot)
+    ((source charset)
+     ;; XXX: NAME is supposed to use the "normalized codeset", such as "utf8",
+     ;; whereas the actual name used is different.  Add a special case to make
+     ;; the right guess for UTF-8.
+     (locale-definition (name name)
+                        (source source)
+                        (charset (denormalize-codeset charset))))
+    (_
+     #f)))
+
 (define* (localedef-command locale
                             #:key (libc (canonical-package glibc)))
   "Return a gexp that runs 'localedef' from LIBC to build LOCALE."
diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index a7c03bda17..58a476a468 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -1,5 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2016 Christopher Allan Webber <cwebber@dustycloud.org>
+;;; Copyright © 2016 Leo Famulari <leo@famulari.name>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -457,7 +459,13 @@ with '-virtfs' options for the host file systems listed in SHARED-FS."
                      "\" "))
 
   #~(string-append
-     " -enable-kvm -no-reboot -net nic,model=virtio \
+     ;; Only enable kvm if we see /dev/kvm exists.
+     ;; This allows users without hardware virtualization to still use these
+     ;; commands.
+     #$(if (file-exists? "/dev/kvm")
+           " -enable-kvm "
+           "")
+     " -no-reboot -net nic,model=virtio \
   " #$@(map virtfs-option shared-fs) " \
   -net user \
   -serial stdio -vga std \