I'd love to be able to write a perl or python script to program the EV3 instead of using the improved but still awful GUI programming software provided by lego.Restoring the system
Before I venture into changing anything via the linux prompt is there anything one needs to do to restore the system other than re-image the firmware?
Writing to the filesystem
The filesystem is mounted as readonly and df claims there isn't any free space. I'm guessing one needs to insert a SD card and use that storage space for adding new software etc. I'll try that tomorrow.
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root@EV3:~# pwd
/home/root
root@EV3:~# whoami
root
root@EV3:~# touch foo
touch: foo: Read-only file system
root@EV3:~#
root@EV3:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 22.4M 22.4M 0 100% /
none 1.0M 48.0K 976.0K 5% /dev
tmpfs 2.0M 1.1M 932.0K 54% /var/volatile
tmpfs 6.0M 1.4M 4.6M 24% /mnt/ramdisk
root@EV3:~#This thing is bare bones in terms of software. There is no gcc, no perl, no python, no vim, no ftp, no web server, etc. Most everything in /bin is via a busybox build from 2010
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root@EV3:/bin# ls -l | grep busybox
lrwxrwxrwx 1 root root 7 Jan 1 00:00 ash -> busybox
-rwxr-xr-x 1 root root 650588 Jan 1 00:00 busybox
lrwxrwxrwx 1 root root 7 Jan 1 00:00 cat -> busybox
lrwxrwxrwx 1 root root 7 Jan 1 00:00 chgrp -> busybox
lrwxrwxrwx 1 root root 7 Jan 1 00:00 chmod -> busybox
lrwxrwxrwx 1 root root 7 Jan 1 00:00 chown -> busybox
[snip]
root@EV3:/bin# ./busybox
BusyBox v1.13.2 (2010-12-21 19:28:47 CST) multi-call binary
The EV3 does however include wget and there is a pre-built binary of busybox 1.21.1 out there:
[url]http://www.busybox.net/downloads/binaries/1.21.1/busybox-armv5l[/url]
root@EV3:~# cd /tmp
root@EV3:/var/volatile/tmp#
root@EV3:/var/volatile/tmp# wget http://www.busybox.net/downloads/binaries/1.21.1/busybox-armv5l
Connecting to http://www.busybox.net (140.211.167.224:80)
busybox-armv5l 100% |***********************************************************************************************| 1083k 00:00:00 ETA
root@EV3:/var/volatile/tmp#
root@EV3:/var/volatile/tmp# chmod 755 busybox-armv5l
root@EV3:/var/volatile/tmp# ./busybox-armv5l
BusyBox v1.21.1 (2013-07-08 10:13:48 CDT) 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, arp, arping, ash, awk, base64, basename, beep, blkid, blockdev, bootchartd,
brctl, bunzip2, bzcat, bzip2, cal, cat, catv, chat, chattr, 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, devmem, df,
dhcprelay, diff, dirname, dmesg, dnsd, dnsdomainname, dos2unix, 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,
flock, fold, free, freeramdisk, fsck, fsck.minix, fsync, ftpd, ftpget, ftpput, fuser, getopt, getty, grep, groups, gunzip, gzip, halt,
hd, hdparm, head, hexdump, hostid, hostname, httpd, hush, hwclock, id, ifconfig, ifdown, ifenslave, ifplugd, ifup, inetd, init, 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, loadfont, loadkmap, logger, login, logname, logread, losetup, lpd, lpq, lpr, ls, lsattr,
lsmod, lsof, lspci, lsusb, lzcat, lzma, lzop, lzopcat, makedevs, makemime, man, md5sum, mdev, mesg, microcom, mkdir, mkdosfs, mke2fs,
mkfifo, mkfs.ext2, mkfs.minix, mkfs.vfat, mknod, mkpasswd, mkswap, mktemp, modinfo, modprobe, more, mount, mountpoint, mpstat, mt, mv,
nameif, nanddump, nandwrite, nbd-client, nc, netstat, nice, nmeter, nohup, nslookup, ntpd, 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, rev, rm,
rmdir, rmmod, route, rpm, rpm2cpio, rtcwake, run-parts, runlevel, runsv, runsvdir, rx, script, scriptreplay, sed, sendmail, seq,
setarch, setconsole, setfont, setkeycodes, setlogcons, 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, tcpsvd, tee, telnet, telnetd, test, tftp, tftpd, time, timeout,
top, touch, tr, traceroute, traceroute6, true, tty, ttysize, tunctl, udhcpc, udhcpd, udpsvd, umount, uname, 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
root@EV3:/var/volatile/tmp#Does anyone know of a GCC binary that will work on this system?