Difference between revisions of "Busybox replacement"

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(Fill in 1.0 candidate list, with shell caveats.)
 
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This page has information about the commands and features desired for a busybox replacement program.
+
== Toybox ==
 +
The leading contender for a multi-function program that could be
 +
used instead of busybox is toybox.  
  
See [[Busybox replacement project]] for the project proposal for this work.
+
The Toybox material previously on this page
 +
has been moved to http://landley.net/toybox/roadmap.html
  
== Command List ==
+
=== Sony CE Linux (internal distribution) 1.13.4 build ===
 
+
This is from a version of busybox used in lots of Sony products:
We have several potential use cases for a busybox replacement, and are using those to determine a consensus on which commands to target for a 1.0 release of an unencumbered busybox replacement package.
+
Currently defined functions:
 +
<pre>
 +
        [, [[, ash, basename, bunzip2, bzcat, cat, chgrp, chmod, chown,
 +
        chroot, cmp, cp, cpio, cut, date, dd, dirname, dmesg, echo, egrep,
 +
        env, expr, false, fgrep, freeramdisk, ftpget, ftpput, getty, grep,
 +
        gunzip, gzip, halt, ifconfig, insmod, kill, killall, klogd, ln,
 +
        logger, login, ls, lsmod, md5sum, mkdir, mkfifo, mknod, mktemp,
 +
        modprobe, mount, mv, pidof, ping, ping6, pivot_root, poweroff,
 +
        pwd, readlink, reboot, rm, rmdir, rmmod, route, sed, sfdisk, sh,
 +
        sha1sum, sleep, sort, stty, swapoff, swapon, switch_root, sync,
 +
        syslogd, tail, tar, taskset, telnet, telnetd, test, touch, true,
 +
        umount, uname, uniq, usleep, vconfig, wc, xargs, zcat
 +
</pre>
  
Our current candidate list combines the commands toybox already implements, the development environment command list, the toolbox standard commands, and the Sony configuration of busybox.
+
=== Prioritization ===
 +
The following is Tim's prioritization of the above list, based on his own experience
 +
with embedded systems.  I will divide the above list into 3 groups: must-have,
 +
nice-to-have, not-that-important.
  
Thus the first release of a busybox replacement should include the following commands:
+
Must-have:  
 +
cat chgrp chmod chown cp date df
 +
echo env expr false find grep head id kill ln
 +
ls mkdir more mv nice ps pwd rm rmdir sh sleep
 +
sort tail test touch true uname uniq wc xargs
  
  awk basename bunzip2 bzcat bzip2 cal cat catv chgrp chmod
+
(must have, not in the above list: chroot, dmesg, sync)
  chown chroot chvt cksum cmp comm count cp cpio cut date dd df
 
  diff dirname dmesg dnsdomainname echo egrep env expr false fgrep
 
  find freeramdisk ftpd ftpget ftpput getty grep gunzip gzip halt
 
  hd head help hostname id ifconfig iftop init insmod install
 
  ioctl ionice kill killall klogd less link ln logger login
 
  logname losetup ls lsmod lsof man md5sum mdev mkdir mkfifo mknod
 
  mkswap mktemp modprobe mount mountpoint mv nc netcat netstat
 
  newfs_msdos nice nohup notify od oneit patch pgrep pidof ping
 
  ping6 pivot_root pkill poweroff printenv ps pwd readlink reboot
 
  renice rm rmdir rmmod route sed seq setsid sfdisk sh sha1sum
 
  sleep sort split start stat stop stty swapoff swapon switch_root
 
  sync syslogd tac tail tar taskset tee telnet telnetd test time
 
  top touch tr true truncate tty umount uname uniq unlink unshare
 
  uptime usleep vconfig vi vmstat wc wget which whoami xargs yes
 
  zcat
 
  
Plus additional to-be-determined shell functionality.
+
Nice-to-have:
 +
basename cut dd diff dirname du mkfifo printf sed tee time vi who zcat
  
== Toybox currently implements ==
+
Not-that-important:
 +
at awk bc cal cksum cmp comm csplit expand file
 +
fold fuser getconf link logger logname man newgrp nl
 +
nohup od paste patch pathchk renice split stty tabs
 +
tput tr tty unexpand unlink uudecode uuencode
  
The triaged toybox (2 clause BSD license) is currently implementing usable versions of:
+
Must-have unimplemented: The following list has Tim's must-have commands,
 +
which are currently (as of Jan, 2012) not implemented in toybox:
 +
chgrp chmod chown date dd
 +
expr find grep head id kill ln
 +
ls mkdir more mv nice ps rm
 +
tail test touch uniq xargs
  
  bzcat cal cat catv chroot chvt cksum count cp df dirname dmesg
+
==== prioritized, must-have, unimplemented list ====
  echo false help link mkswap nc netcat nice nohup oneit patch pwd
+
Prioritized top 13:
  rmdir seq setsid sha1sum sleep sort sync tee true truncate tty
+
1. ls
  uname unlink unshare wc which yes
+
2. mkdir
 +
3. rm
 +
4. ln
 +
5. mv
 +
6. ps
 +
7. kill
 +
8. chmod
 +
9. chown
 +
10. date
 +
11. grep
 +
12. find
 +
13. xargs
  
And contains partial implementations of:
+
Second prioritized group:
  mdev sh
+
chgrp id nice expr head tail test touch uniq dd more
  
See [http://landley.net/code/toybox/todo.txt the Toybox todo list] for the most up to date status.
+
IMHO - ls needs to support -ladR at first
  
== Use case: provide a self-hosting development environment ==
+
==== toolbox complement ====
 +
If we omit toolbox supported commands from the must-have, unimplemented list, we get:
 +
chgrp expr false find grep head more
 +
nice tail test touch true uname xargs
  
The following commands are enough to build the Aboriginal Linux development environment, boot it to a shell prompt, and build Linux From Scratch 6.8 under it.  (Aboriginal Linux currently uses BusyBox for this, thus provides a corresponding test environment for toybox.)
+
I would add tab completion and globbing for toysh to the list.
  
This use case includes running init scripts and other shell scripts, running configure, make, and install in each package, and providing basic command line facilities such as a text editor. (It does not include a compiler toolchain or C library, those are outside the scope of this project.)
+
This would be for a toolbox complement.
  
=== Already in toybox ===
+
== Other multi-tool programs ==
  bzcat cat cp dirname echo patch rmdir sha1sum sleep sort sync
+
=== Beastiebox currently implements ===
  true uname wc which yes env
+
Here’s a link to the Beastiebox project: http://beastiebox.sourceforge.net/
 +
which has been proven to be capable to replace busybox, in general.
 +
It mostly consists of BSD sources and contains, according to the homepage:
  
=== Additional commands for development environment ===
+
   [ cat chmod cp date df disklabel dmesg ex fdisk fsck fsck_ffs
   zcat awk basename bzip2 chmod chown cmp cut date dd diff
+
   getty halt hostname ifconfig init kill less ln login ls [https://www.mirbsd.org/mksh.htm mksh] more
   egrep expr find grep gzip head hostname id install ln ls
+
   mount mount_ffs mv pfctl ping poweroff ps reboot rm route sed sh
   mkdir mktemp mv od readlink rm sed sh tail tar touch tr uniq
+
   stty sysctl tar test traceroute umount vi wiconfig
   wget whoami xargs chgrp comm gunzip less logname man split
 
  tee test time bunzip2 chgrp chroot comm cpio dmesg
 
  dnsdomainname ftpd ftpget ftpput gunzip ifconfig init less
 
  logname losetup man mdev mount mountpoint nc pgrep pkill
 
  pwd route split stat switch_root tac tee test time umount vi
 
  
Note: Aboriginal Linux installs bash 2.05b as #!/bin/sh and its scripts require bash extensions not present in busybox ash.
+
Of course, every command is optional; for example, pfctl is currently BSD specific, and fsck_ffs/mount_ffs do not make much sense on Linux either, so these would be disabled in a Linux build of Beastiebox.
  
== Use case: replacing Toolbox commands ==
+
On the TODO side, the Linux specific commands would need to be implemented
 +
or taken from one of the others (Toybox, Android Toolbox, etc).
  
=== Standard commands ===
+
It does contain a complete shell (mksh, MirBSD Korn Shell) under a BSD-ish
Toolbox in Android (what version?) implements the following standard commands:
+
licence, which can be used as /bin/sh (e.g. on Debian) and is the default
 
+
/system/bin/sh on Android ICS and later, even. This is not much bigger than
date id uptime ifconfig start stop newfs_msdos
+
the sh included with Busybox, Beastiebox (can be disabled in favour of mksh)
ls route netstat ioctl reboot cmp insmod chmod
+
and others, but has functions such as command line editing, UTF-8 support,
cat lsmod chown df top printenv ionice rmmod
+
Tab completion, Korn Shell scripting features ('''[[''', arrays, etc). and is
sleep notify iftop rmdir dd vmstat hd rm mount
+
actively developed on its own.
ln lsof ps dmesg renice kill mkdir mv
 
sync umount
 
 
 
=== Android-specific commands ===
 
Toolbox also provides the following nonstandard commands, which are unique to Android (or at least do not appear in Ubuntu or
 
SUSv4):
 
 
 
  alarm schedtop getprop log setprop watchprops notify wipe
 
  getevent sendevent nandread smd setconsole r ioctl
 
 
 
== Busybox commands ==
 
=== default 1.10 build ===
 
A default build of Busybox 1.10 has the following commands:
 
 
 
<pre>
 
[, [[, addgroup, adduser, adjtimex, ar, arp, arping, ash,
 
awk, basename, bunzip2, bzcat, bzip2, cal, cat, catv,
 
chattr, chgrp, chmod, chown, chpasswd, chpst, chroot,
 
chrt, chvt, cksum, clear, cmp, comm, cp, cpio, crond,
 
crontab, cryptpw, cut, date, dc, dd, deallocvt, delgroup,
 
deluser, df, dhcprelay, diff, dirname, dmesg, dos2unix,
 
du, dumpkmap, dumpleases, echo, ed, egrep, eject, env,
 
envdir, envuidgid, expand, expr, false, fbset, fdflush,
 
fdformat, fdisk, fgrep, find, fold, free, freeramdisk,
 
fsck, fsck.minix, fuser, getopt, getty, grep, gunzip,
 
gzip, halt, hdparm, head, hexdump, hostid, hostname, hwclock,
 
id, ifconfig, ifdown, ifup, inetd, init, insmod, install,
 
ip, ipaddr, ipcalc, ipcrm, ipcs, iplink, iproute, iprule,
 
iptunnel, kbd_mode, kill, killall, killall5, klogd, last,
 
length, less, linux32, linux64, linuxrc, ln, loadfont,
 
loadkmap, logger, login, logname, logread, losetup, lpd,
 
lpq, lpr, ls, lsattr, lsmod, lzmacat, makedevs, md5sum,
 
mdev, mesg, microcom, mkdir, mkfifo, mkfs.minix, mknod,
 
mkswap, mktemp, modprobe, more, mount, mountpoint, mt,
 
mv, nameif, netstat, nice, nmeter, nohup, nslookup, od,
 
openvt, passwd, patch, pgrep, pidof, ping, pipe_progress,
 
pivot_root, pkill, poweroff, printenv, printf, ps, pscan,
 
pwd, raidautorun, rdate, readlink, readprofile, realpath,
 
reboot, renice, reset, resize, rm, rmdir, rmmod, route,
 
rpm, rpm2cpio, run-parts, runlevel, runsv, runsvdir, rx,
 
script, sed, sendmail, seq, setarch, setconsole, setkeycodes,
 
setlogcons, setsid, setuidgid, sh, sha1sum, sleep, softlimit,
 
sort, split, start-stop-daemon, stat, strings, stty, su,
 
sulogin, sum, sv, svlogd, swapoff, swapon, switch_root,
 
sync, sysctl, syslogd, tac, tail, tar, taskset, tee, telnetd,
 
test, time, top, touch, tr, true, tty, ttysize, udhcpc,
 
udhcpd, umount, uname, uncompress, unexpand, uniq, unix2dos,
 
unlzma, unzip, uptime, usleep, uudecode, uuencode, vi,
 
vlock, watch, watchdog, wc, wget, which, who, whoami,
 
xargs, yes, zcat
 
</pre>
 
 
 
=== Sony CE Linux (internal distribution) 1.13.4 build ===
 
This is from a version of busybox used in lots of Sony products:
 
Currently defined functions:
 
<pre>
 
        [, [[, ash, basename, bunzip2, bzcat, cat, chgrp, chmod, chown,
 
        chroot, cmp, cp, cpio, cut, date, dd, dirname, dmesg, echo, egrep,
 
        env, expr, false, fgrep, freeramdisk, ftpget, ftpput, getty, grep,
 
        gunzip, gzip, halt, ifconfig, insmod, kill, killall, klogd, ln,
 
        logger, login, ls, lsmod, md5sum, mkdir, mkfifo, mknod, mktemp,
 
        modprobe, mount, mv, pidof, ping, ping6, pivot_root, poweroff,
 
        pwd, readlink, reboot, rm, rmdir, rmmod, route, sed, sfdisk, sh,
 
        sha1sum, sleep, sort, stty, swapoff, swapon, switch_root, sync,
 
        syslogd, tail, tar, taskset, telnet, telnetd, test, touch, true,
 
        umount, uname, uniq, usleep, vconfig, wc, xargs, zcat
 
</pre>
 
  
 
== Random Notes ==
 
== Random Notes ==
Line 147: Line 109:
 
Rob wrote:
 
Rob wrote:
  
One nice thing about busybox/toybox/toolbox is you can install multiple
+
One nice thing about busybox/toolbox is you can install multiple
 
implementations side by side, and have what symlinks you create (or what
 
implementations side by side, and have what symlinks you create (or what
 
comes first in the $PATH) determine who is implementing what.
 
comes first in the $PATH) determine who is implementing what.

Latest revision as of 11:23, 1 March 2012

Toybox

The leading contender for a multi-function program that could be used instead of busybox is toybox.

The Toybox material previously on this page has been moved to http://landley.net/toybox/roadmap.html

Sony CE Linux (internal distribution) 1.13.4 build

This is from a version of busybox used in lots of Sony products: Currently defined functions:

        [, [[, ash, basename, bunzip2, bzcat, cat, chgrp, chmod, chown,
        chroot, cmp, cp, cpio, cut, date, dd, dirname, dmesg, echo, egrep,
        env, expr, false, fgrep, freeramdisk, ftpget, ftpput, getty, grep,
        gunzip, gzip, halt, ifconfig, insmod, kill, killall, klogd, ln,
        logger, login, ls, lsmod, md5sum, mkdir, mkfifo, mknod, mktemp,
        modprobe, mount, mv, pidof, ping, ping6, pivot_root, poweroff,
        pwd, readlink, reboot, rm, rmdir, rmmod, route, sed, sfdisk, sh,
        sha1sum, sleep, sort, stty, swapoff, swapon, switch_root, sync,
        syslogd, tail, tar, taskset, telnet, telnetd, test, touch, true,
        umount, uname, uniq, usleep, vconfig, wc, xargs, zcat

Prioritization

The following is Tim's prioritization of the above list, based on his own experience with embedded systems. I will divide the above list into 3 groups: must-have, nice-to-have, not-that-important.

Must-have:

cat chgrp chmod chown cp date df
echo env expr false find grep head id kill ln
ls mkdir more mv nice ps pwd rm rmdir sh sleep
sort tail test touch true uname uniq wc xargs

(must have, not in the above list: chroot, dmesg, sync)

Nice-to-have:

basename cut dd diff dirname du mkfifo printf sed tee time vi who zcat

Not-that-important:

at awk bc cal cksum cmp comm csplit expand file
fold fuser getconf link logger logname man newgrp nl
nohup od paste patch pathchk renice split stty tabs
tput tr tty unexpand unlink uudecode uuencode

Must-have unimplemented: The following list has Tim's must-have commands, which are currently (as of Jan, 2012) not implemented in toybox:

chgrp chmod chown date dd
expr find grep head id kill ln
ls mkdir more mv nice ps rm
tail test touch uniq xargs

prioritized, must-have, unimplemented list

Prioritized top 13:

1. ls
2. mkdir
3. rm
4. ln
5. mv
6. ps
7. kill
8. chmod
9. chown
10. date
11. grep
12. find
13. xargs

Second prioritized group:

chgrp id nice expr head tail test touch uniq dd more

IMHO - ls needs to support -ladR at first

toolbox complement

If we omit toolbox supported commands from the must-have, unimplemented list, we get:

chgrp expr false find grep head more
nice tail test touch true uname xargs

I would add tab completion and globbing for toysh to the list.

This would be for a toolbox complement.

Other multi-tool programs

Beastiebox currently implements

Here’s a link to the Beastiebox project: http://beastiebox.sourceforge.net/ which has been proven to be capable to replace busybox, in general. It mostly consists of BSD sources and contains, according to the homepage:

 [ cat chmod cp date df disklabel dmesg ex fdisk fsck fsck_ffs
 getty halt hostname ifconfig init kill less ln login ls mksh more
 mount mount_ffs mv pfctl ping poweroff ps reboot rm route sed sh
 stty sysctl tar test traceroute umount vi wiconfig

Of course, every command is optional; for example, pfctl is currently BSD specific, and fsck_ffs/mount_ffs do not make much sense on Linux either, so these would be disabled in a Linux build of Beastiebox.

On the TODO side, the Linux specific commands would need to be implemented or taken from one of the others (Toybox, Android Toolbox, etc).

It does contain a complete shell (mksh, MirBSD Korn Shell) under a BSD-ish licence, which can be used as /bin/sh (e.g. on Debian) and is the default /system/bin/sh on Android ICS and later, even. This is not much bigger than the sh included with Busybox, Beastiebox (can be disabled in favour of mksh) and others, but has functions such as command line editing, UTF-8 support, Tab completion, Korn Shell scripting features ([[, arrays, etc). and is actively developed on its own.

Random Notes

Can implement incrementally

Rob wrote:

One nice thing about busybox/toolbox is you can install multiple implementations side by side, and have what symlinks you create (or what comes first in the $PATH) determine who is implementing what.

This allows gradual transitions. Each release, we replace a couple more commands from the old one, until the old one finally isn't being used for anything anymore and we can uninstall it...