linux busybox学习

最新推荐文章于 2024-09-21 11:05:59 发布

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#linux #busybox #嵌入式系统

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BusyBox是一个集成了众多Linux命令和工具的软件，它能够作为一个多用途的单个可执行文件来替代许多常见的工具，如GNU fileutils和shellutils等。由于其体积小巧，非常适合于资源受限的嵌入式系统。

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busybox就是一个工具箱，它集成压缩了很多的linux命令和工具，也包含了Android系统的自带shell；
在需要时打开工具箱取相应的工具使用即可。
sh-# busybox
BusyBox v1.15.3 (2012-03-28 19:45:58 CST) multi-call binary
Copyright (C) 1998-2008 Erik Andersen, Rob Landley, Denys Vlasenko
and others. Licensed under GPLv2.
See source distribution for full notice.

Usage: busybox [function] [arguments]...
or: function [arguments]...

        BusyBox is a multi-call binary that combines many common Unix
        utilities into a single executable. Most people will create a
        link to busybox for each function they wish to use and BusyBox
        will act like whatever it was invoked as!

Currently defined functions:
        [, [[, addgroup, adduser, ar, arp, arping, ash, awk,
        basename, blkid, bunzip2, bzcat, bzip2, cal, cat, chattr, chmod,
        chown, chpasswd, chrt, chvt, cksum, clear, cp, cpio,
        date, dc, dd, delgroup, deluser, depmod, devmem, df,
        dirname, dmesg, dnsdomainname, dos2unix, du, dumpkmap, echo, egrep,
        eject, env, expand, expr, fakeidentd, false,
        fdformat, fdisk, fgrep, find, findfs, fsck,
        fsck.minix, fsync, getopt, getty, grep, gunzip, gzip, halt, head,
        hexdump, hostid, hostname, hush, hwclock, id, ifconfig, ifdown,
        ifenslave, ifplugd, ifup, inetd, insmod, install, ionice, ip, ipaddr,
        ipcrm, ipcs, iplink, iproute, kbd_mode, kill, killall, last,
        length, linux32, linux64, ln, login, logname,
        losetup, lpd, lpq, lpr, ls, lsattr, lsmod, lzop,
        makedevs, md5sum, mdev, mesg, mkdir, mkdosfs, mkfifo,
        mkfs.minix, mkfs.vfat, mknod, mkswap, modprobe, more, mount,
        mountpoint, msh, mt, mv, netstat, nice, nohup, nslookup, openvt,
        passwd, ping, pkill, poweroff, printenv, ps, pwd,
        raidautorun, rdate, rdev, readahead, readlink, readprofile, reboot,
        reset, resize, rm, rmmod, route, rtcwake, runlevel, script,
        scriptreplay, sed, setarch, setconsole,
        setsid, sh, sleep, sort, stat, strings, stty, su,
        sulogin, sum, swapoff, swapon, sync, sysctl, tac, tail,
        tar, test, time, timeout, top, touch, true, tty,
        ttysize, udhcpc, umount, uname, uncompress, unix2dos,
        unzip, uptime, vi, watch, which, xargs

sh-#

linux系统自带了很多工具放在/bin、/sbin等目录下。
而busybox将许多具有共性的linux工具整合到了一个单一的可执行文件中，
这样它就可以替代大部分常用工具比如GNU fileutils、shellutils等。
正因为busybox提供了一个比较完善的工具环境，使得整合后的工具箱占用磁盘空间变小了，
所以它适合那些flash、EEPROM等资源有限的嵌入式系统。