Author: rob
Date: Wed Jan 19 09:06:12 2011
New Revision: 25622
URL: https://svn.nixos.org/websvn/nix/?rev=25622&sc=1
Log:
added vm function to extract some filesystem
Modified:
nixpkgs/trunk/pkgs/build-support/vm/default.nix
Modified: nixpkgs/trunk/pkgs/build-support/vm/default.nix
==============================================================================
--- nixpkgs/trunk/pkgs/build-support/vm/default.nix Tue Jan 18 23:17:49
2011 (r25621)
+++ nixpkgs/trunk/pkgs/build-support/vm/default.nix Wed Jan 19 09:06:12
2011 (r25622)
@@ -342,6 +342,49 @@
QEMU_OPTS = "-m ${toString (if attrs ? memSize then attrs.memSize else
256)}";
});
+ extractFs = {file, fs ? null} :
+ with pkgs; runInLinuxVM (
+ stdenv.mkDerivation {
+ name = "extract-file";
+ buildInputs = [utillinuxng];
+ buildCommand = ''
+ ln -s ${linux}/lib /lib
+ ${module_init_tools}/sbin/modprobe loop
+ ${module_init_tools}/sbin/modprobe ext4
+ ${module_init_tools}/sbin/modprobe iso9660
+ mknod /dev/loop0 b 7 0
+
+ ensureDir $out
+ ensureDir tmp
+ mount -o loop ${lib.optionalString (fs != null) "-t ${fs} "}${file} tmp
+ cp -R tmp/* $out/
+ '';
+ });
+
+ extractMTDfs = {file, fs ? null} :
+ with pkgs; runInLinuxVM (
+ stdenv.mkDerivation {
+ name = "extract-file-mtd";
+ buildInputs = [utillinuxng mtdutils];
+ buildCommand = ''
+ ln -s ${linux}/lib /lib
+ ${module_init_tools}/sbin/modprobe mtd
+ ${module_init_tools}/sbin/modprobe mtdram total_size=65536
+ ${module_init_tools}/sbin/modprobe mtdchar
+ ${module_init_tools}/sbin/modprobe mtdblock
+ ${module_init_tools}/sbin/modprobe jffs2
+ mknod /dev/mtd0 c 90 0
+ mknod /dev/mtdblock0 b 31 0
+
+ ensureDir $out
+ ensureDir tmp
+
+ dd if=${file} of=/dev/mtd0
+ mount ${lib.optionalString (fs != null) "-t ${fs} "}/dev/mtdblock0 tmp
+
+ cp -R tmp/* $out/
+ '';
+ });
qemuCommandGeneric = ''
${kvm}/bin/qemu-system-x86_64 \
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