Another wandering soul whispering into the void. If you are looking for my blog you are in the wrong place. The profile and header pictures are brought to you by cdd20.
There’s a quick way to test the offline behaviour of programs on Linux.
unshare -c -n bash$ ip addr
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00List network namespaces with lsns.
$ lsns -t net
NS TYPE NPROCS PID USER NETNSID COMMAND
999 net 2 111 user 3 systemd
888 net 1 222 user unassigned └─bashAnother wandering soul whispering into the void. If you are looking for my blog you are in the wrong place. The profile and header pictures are brought to you by cdd20.
An actual but where did my Linux memory go command;
This program
(repositories) came in handy while
helping someone resolve an problem. Want to
see memory usage and shared memory, perhaps
sorted by swap?
smem -s swap -kta
smem --sort swap --abbreviate --totals --autosize--sort?
swap (amount of swap space consumed ignoring sharing)
command (process command line)
maps (total mappings count)
name (process name)
pid (process id #)
user (process owner)
pss (proportional set size including sharing)
rss (resident set size ignoring sharing)
uss (unique set size)
vss (virtual set size; total virtual memory mapped)/tmp/ and tmpfs (temporary file storage) abusers;
df -h | grep tmpfs
df --human-readable | grep tmpfsAnother wandering soul whispering into the void. If you are looking for my blog you are in the wrong place. The profile and header pictures are brought to you by cdd20.
Different words similar meaning?
--references
is NixOS speak for direct
package dependencies.
--requisites list all. These work with the
nix-store
command.
$ readlink --canonicalize "$(type -P which)"
/nix/store/r78jv9xgxnvsm5vpasf5ldkc28pkri6r-which-2.21/bin/which
$ nix-store --query --references /nix/store/r78jv9xgxnvsm5vpasf5ldkc28pkri6r-which-2.21
/nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163which directly depends on
glibc. Swap --references to
--referrers for paths pointing to which.
On Guix, list/draw dependencies with
guix graph.
guix graph --type=references which
nix-store --query --tree "$(readlink --canonicalize "$(type -P which)")"Another wandering soul whispering into the void. If you are looking for my blog you are in the wrong place. The profile and header pictures are brought to you by cdd20.
{ stdenv, lib, fetchgit, linuxKernel, kernel ? linuxKernel.kernels.linux_5_15
, version ? "d0d785dc1859b09299bde6d0f1d6786a0d610e7f" }:
stdenv.mkDerivation {
inherit version;
name = "sna-hda-codec-cs8409-${version}-module-${kernel.modDirVersion}";
# Upstream: https://github.com/davidjo/snd_hda_macbookpro
src = fetchgit {
url = "https://github.com/egorenar/snd-hda-codec-cs8409.git";
rev = version;
sha256 = "sha256-0UeoERcYpM+ojeZ7dDIE3ruTIoHkkC+s7FcoEVUTR0w=";
};
hardeningDisable = [ "pic" ];
nativeBuildInputs = kernel.moduleBuildDependencies;
NIX_CFLAGS_COMPILE = [ "-g" "-Wall" "-Wno-unused-variable" "-Wno-unused-function" ];
makeFlags = kernel.makeFlags ++ [
"INSTALL_MOD_PATH=$(out)"
"KERNELRELEASE=${kernel.modDirVersion}"
"KERNEL_DIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
];
postPatch = ''
printf '
snd-hda-codec-cs8409-objs := patch_cs8409.o patch_cs8409-tables.o
obj-$(CONFIG_SND_HDA_CODEC_CS8409) += snd-hda-codec-cs8409.o
KBUILD_EXTRA_CFLAGS = "-DAPPLE_PINSENSE_FIXUP -DAPPLE_CODECS -DCONFIG_SND_HDA_RECONFIG=1"
KERNELRELEASE ?= $(shell uname -r)
KERNEL_DIR ?= /lib/modules/$(KERNELRELEASE)/build
PWD := $(shell pwd)
default:
make -C $(KERNEL_DIR) M=$(PWD) CFLAGS_MODULE=$(KBUILD_EXTRA_CFLAGS)
install:
make -C $(KERNEL_DIR) M=$(PWD) modules_install
' \
> Makefile
sed --in-place 's|<sound/cs42l42.h>|"${linuxKernel.kernels.linux_6_0.dev}/lib/modules/${linuxKernel.kernels.linux_6_0.modDirVersion}/source/include/sound/cs42l42.h"|' patch_cs8409.h
sed --in-place 's|hda_local.h|${kernel.dev}/lib/modules/${kernel.modDirVersion}/source/sound/pci/hda/hda_local.h|' patch_cs8409.h
sed --in-place 's|hda_jack.h|${kernel.dev}/lib/modules/${kernel.modDirVersion}/source/sound/pci/hda/hda_jack.h|' patch_cs8409.h
sed --in-place 's|hda_generic.h|${kernel.dev}/lib/modules/${kernel.modDirVersion}/source/sound/pci/hda/hda_generic.h|' patch_cs8409.h
sed --in-place 's|hda_auto_parser.h|${kernel.dev}/lib/modules/${kernel.modDirVersion}/source/sound/pci/hda/hda_auto_parser.h|' patch_cs8409.h
'';
meta = { platforms = lib.platforms.linux; };
}Then build it as a extra/custom kernel module. The results of stumbling upon yet another troublesome device…
{ pkgs, ... }:
{
boot = {
extraModulePackages = [
(pkgs.callPackage ../packages/snd-hda-cs8409/default.nix {
kernel = pkgs.linux_5_15;
})
];
};
}