forked from DGNum/liminix
95 lines
3.4 KiB
Nix
95 lines
3.4 KiB
Nix
## Busybox
|
|
## =======
|
|
##
|
|
## Busybox provides stripped-down versions of many usual
|
|
## Linux/Unix tools, and may be configured to include only
|
|
## the commands (termed "applets") required by the user or
|
|
## by other included modules.
|
|
|
|
{ lib, pkgs, config, ...}:
|
|
let
|
|
inherit (lib) mkOption mkEnableOption types mapAttrsToList;
|
|
inherit (pkgs.pseudofile) dir symlink;
|
|
inherit (lib.strings) toUpper;
|
|
|
|
attrs = { options, applets } :
|
|
let
|
|
extraOptions = builtins.concatStringsSep "\n"
|
|
(mapAttrsToList (n: v: "CONFIG_${toUpper n} ${toString v}") options);
|
|
appletOptions = builtins.concatStringsSep "\n"
|
|
(map (n: "CONFIG_${toUpper n} y") applets);
|
|
in {
|
|
enableMinimal = true;
|
|
extraConfig = ''
|
|
${extraOptions}
|
|
${appletOptions}
|
|
'';
|
|
};
|
|
cfg = config.programs.busybox;
|
|
busybox = pkgs.busybox.override (attrs { inherit (cfg) applets options; });
|
|
makeLinks = lib.attrsets.genAttrs
|
|
cfg.applets
|
|
(a: symlink "${busybox}/bin/busybox");
|
|
minimalApplets = [
|
|
# this is probably less minimal than it could be
|
|
"arch" "ash" "base64" "basename" "bc" "brctl" "bunzip2" "bzcat"
|
|
"bzip2" "cal" "cat" "chattr" "chgrp" "chmod" "chown" "chpst"
|
|
"chroot" "clear" "cmp" "comm" "cp" "cpio" "cut" "date" "dd" "df"
|
|
"dirname" "dmesg" "du" "echo" "egrep" "env" "expand" "expr"
|
|
"false" "fdisk" "fgrep" "find" "free" "fuser" "grep" "gunzip"
|
|
"gzip" "head" "hexdump" "hostname" "hwclock" "ifconfig" "ip"
|
|
"ipaddr" "iplink" "ipneigh" "iproute" "iprule" "kill" "killall"
|
|
"killall5" "less" "ln" "ls" "lsattr" "lsof" "md5sum" "mkdir"
|
|
"mknod" "mktemp" "mount" "mv" "nc" "netstat" "nohup" "od" "pgrep"
|
|
"pidof" "ping" "ping6" "pkill" "pmap" "printenv" "printf" "ps"
|
|
"pwd" "readlink" "realpath" "reset" "rm" "rmdir" "route" "sed"
|
|
"seq" "setsid" "sha1sum" "sha256sum" "sha512sum" "sleep" "sort"
|
|
"stat" "strings" "stty" "su" "sum" "swapoff" "swapon" "sync"
|
|
"tail" "tee" "test" "time" "touch" "tr" "traceroute" "traceroute6"
|
|
"true" "truncate" "tty" "udhcpc" "umount" "uname"
|
|
"unexpand" "uniq" "unlink" "unlzma" "unxz" "unzip" "uptime"
|
|
"watch" "wc" "whoami" "xargs" "xxd" "xz" "xzcat" "yes" "zcat"
|
|
];
|
|
in {
|
|
options = {
|
|
programs.busybox = {
|
|
applets = mkOption {
|
|
type = types.listOf types.str;
|
|
description = "Applets required";
|
|
default = [];
|
|
example = ["sh" "getty" "login"];
|
|
};
|
|
options = mkOption {
|
|
# mostly the values are y n or m, but sometimes
|
|
# other strings are also used
|
|
description = "Other busybox config flags that do not map directly to applet names (often prefixed FEATURE_)";
|
|
type = types.attrsOf types.nonEmptyStr;
|
|
default = { };
|
|
};
|
|
};
|
|
};
|
|
config = {
|
|
programs.busybox = {
|
|
applets = minimalApplets;
|
|
options = {
|
|
ASH_ECHO = "y";
|
|
# ASH_OPTIMIZE_FOR_SIZE = "y";
|
|
BASH_IS_NONE = "y";
|
|
SH_IS_ASH = "y";
|
|
ASH_BASH_COMPAT = "y";
|
|
FEATURE_EDITING = "y"; # readline-ish command editing
|
|
FEATURE_EDITING_HISTORY = "128";
|
|
FEATURE_EDITING_MAX_LEN = "1024";
|
|
FEATURE_TAB_COMPLETION = "y";
|
|
FEATURE_EDITING_WINCH = "y";
|
|
FEATURE_IPV6 = "y";
|
|
};
|
|
};
|
|
filesystem = dir {
|
|
bin = dir ({
|
|
busybox = symlink "${busybox}/bin/busybox";
|
|
sh = symlink "${busybox}/bin/busybox";
|
|
} // makeLinks);
|
|
};
|
|
};
|
|
}
|