linux畅想

编译平台：在树莓派上编译，支持安卓手机上执行。
CPU信息:

pi@raspberrypi ~/code/busybox-1.22.1 $ cat /proc/cpuinfo
processor       : 0
model name      : ARMv6-compatible processor rev 7 (v6l)busybox
BogoMIPS        : 2.00
Features        : swp half thumb fastmult vfp edsp java tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xb76
CPU revision    : 7

Hardware        : BCM2708
Revision        : 000e
Serial          : 00000000678d92f9

该busybox包含大部分功能，个别几个功能由于编译不过去掉了。

pi@raspberrypi ~/code/busybox-1.22.1 $ ./busybox
BusyBox v1.22.1 (2014-08-08 14:37:17 UTC) multi-call binary.
BusyBox is copyrighted by many authors between 1998-2012.
Licensed under GPLv2. See source distribution for detailed
copyright notices.

Usage: busybox [function [arguments]...]
   or: busybox --list[-full]
   or: busybox --install [-s] [DIR]
   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:
        [, [[, acpid, add-shell, addgroup, adduser,
        adjtimex, ar, arp, arping, awk, base64, basename,
        bbconfig, beep, blkid, blockdev, bootchartd, brctl,
        bunzip2, bzcat, bzip2, cal, cat, catv, chat, chattr,
        chcon, chgrp, chmod, chown, chpasswd, chpst, chroot,
        chrt, chvt, cksum, clear, cmp, comm, conspy, cp,
        cpio, crond, crontab, cryptpw, cttyhack, cut, date,
        dc, dd, deallocvt, delgroup, deluser, depmod,
        devfsd, devmem, df, dhcprelay, diff, dirname, dmesg,
        dnsd, dnsdomainname, dos2unix, dpkg, dpkg-deb, du,
        dumpkmap, dumpleases, echo, ed, egrep, eject, env,
        envdir, envuidgid, ether-wake, expand, expr,
        fakeidentd, false, fbset, fbsplash, fdflush,
        fdformat, fdisk, fgconsole, fgrep, find, findfs,
        flash_eraseall, flash_lock, flash_unlock, flashcp,
        flock, fold, free, freeramdisk, fsck, fsck.minix,
        fstrim, fsync, ftpd, ftpget, ftpput, fuser,
        getenforce, getopt, getsebool, getty, grep, groups,
        gunzip, gzip, halt, hd, hdparm, head, hexdump,
        hostid, hostname, httpd, hush, hwclock, id,
        ifconfig, ifdown, ifenslave, ifplugd, ifup, inetd,
        init, inotifyd, insmod, install, ionice, iostat, ip,
        ipaddr, ipcalc, ipcrm, ipcs, iplink, iproute,
        iprule, iptunnel, kbd_mode, kill, killall, killall5,
        klogd, last, less, linux32, linux64, linuxrc, ln,
        load_policy, loadfont, loadkmap, logger, logname,
        logread, losetup, lpd, lpq, lpr, ls, lsattr, lsmod,
        lsof, lspci, lsusb, lzcat, lzma, lzop, lzopcat,
        makedevs, makemime, man, matchpathcon, md5sum, mdev,
        mesg, microcom, mkdir, mkdosfs, mke2fs, mkfifo,
        mkfs.ext2, mkfs.minix, mkfs.reiser, mkfs.vfat,
        mknod, mkpasswd, mkswap, mktemp, modinfo, modprobe,
        more, mount, mountpoint, mpstat, msh, mt, mv,
        nameif, nanddump, nandwrite, nbd-client, nc,
        netstat, nice, nmeter, nohup, nslookup, od, openvt,
        passwd, patch, pgrep, pidof, ping, ping6,
        pipe_progress, pivot_root, pkill, pmap, popmaildir,
        poweroff, powertop, printenv, printf, ps, pscan,
        pstree, pwd, pwdx, raidautorun, rdate, rdev,
        readahead, readlink, readprofile, realpath, reboot,
        reformime, remove-shell, renice, reset, resize,
        restorecon, rev, rfkill, rm, rmdir, rmmod, route,
        rpm, rpm2cpio, rtcwake, run-parts, runcon, runlevel,
        runsv, runsvdir, rx, script, scriptreplay, sed,
        selinuxenabled, sendmail, seq, sestatus, setarch,
        setconsole, setenforce, setfiles, setfont,
        setkeycodes, setlogcons, setsebool, setserial,
        setsid, setuidgid, sh, sha1sum, sha256sum, sha3sum,
        sha512sum, showkey, slattach, sleep, smemcap,
        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, tcpsvd, tee, telnet,
        telnetd, test, tftp, tftpd, time, timeout, touch,
        tr, traceroute, traceroute6, true, tty, ttysize,
        tunctl, tune2fs, ubiattach, ubidetach, ubimkvol,
        ubirmvol, ubirsvol, ubiupdatevol, udhcpc, udhcpc6,
        udhcpd, udpsvd, umount, uname, uncompress, unexpand,
        uniq, unix2dos, unlzma, unlzop, unxz, unzip, uptime,
        users, usleep, uudecode, uuencode, vconfig, vi,
        vlock, volname, wall, watch, watchdog, wc, wget,
        which, who, whoami, whois, xargs, xz, xzcat, yes,
        zcat, zcip

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