I haven't been paying attention here much of late, but I chanced upon this discussion today.... At Mon, 5 Jun 2017 01:25:08 +0300, Michael Pounov <misho%elwix.org@localhost> wrote: Subject: Re: NetBSD on embedded devices > > I wrote this, because I want just to reminder about using crunchgen > and embedded rootfs into kernel. > > You can mitigate this when built in into rootfs very small basic > collection of tiny critical programs for serving boot system > process. There's really no need to be too selective when using crunchgen. My boot CD is very nearly a (command-line-only) "live" CD. Why struggle with a limited set of commands, some of them crippled to remove features, when you can have everything from a full base.tgz but in a fraction of the space? I've built a nearly fully functional NetBSD-5 i386 base system which will run on even the most minimal i386 systems I can still make work. What's most incredible though is how fast the system is at general tasks and command-line responsiveness, even running it out of a slow disk on a slow CPU. When *everything* runs out of the same 9.7MB text segment, and it is of course static-linked so no running an extra and expensive program just to start every program, exec time is imperceptible, even for rarely used and large programs. It also makes it possible to upgrade every bit of executable user-land code all at once by replacing just one 9MB binary. 274 utilities from /bin, /sbin, /usr/bin, /usr/sbin, and /usr/libexec: 02:59 [41] $ file ramdiskbin ramdiskbin: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, for NetBSD 5.2, stripped 02:59 [42] $ size ramdiskbin text data bss dec hex filename 9700273 270300 4222768 14193341 d892bd ramdiskbin 02:59 [43] $ ls -l ramdiskbin -rwxr-xr-x 1 woods wheel 9974568 Jun 5 2016 ramdiskbin 02:59 [44] $ l *.cro altqd.cro hexdump.cro ntpdc.cro ssh-keysign.cro altqstat.cro host.cro ntpq.cro ssh.cro apply.cro hostapd.cro ntptime.cro sshd.cro arp.cro hostapd_cli.cro omshell.cro stat.cro at.cro hostname.cro openssl.cro stty.cro atrun.cro iconv.cro passwd.cro su.cro awk.cro id.cro pax.cro swapctl.cro basename.cro identd.cro pcictl.cro sync.cro bc.cro ifconfig.cro ping.cro sysctl.cro bdes.cro ifwatchd.cro pkill.cro syslogd.cro bootpd.cro inetd.cro pmap.cro systat.cro bootpef.cro init.cro pppd.cro tail.cro bootpgw.cro installboot.cro pppdump.cro tbrconfig.cro bootptest.cro iopctl.cro pppoectl.cro tcpdchk.cro bzip2.cro iostat.cro pppstats.cro tcpdmatch.cro cap_mkdb.cro ipf.cro pr.cro tcpdrop.cro cat.cro ipfs.cro printenv.cro tcpdump.cro chat.cro ipfstat.cro printf.cro tee.cro chflags.cro ipftest.cro ps.cro telnet.cro chio.cro ipmon.cro pstat.cro telnetd.cro chmod.cro ipnat.cro pwd.cro test.cro chown.cro ippool.cro pwd_mkdb.cro tftp.cro chpass.cro ipresend.cro racoon.cro tftpd.cro chroot.cro ipsend.cro racoonctl.cro time.cro cksum.cro iptest.cro raidctl.cro timed.cro cmp.cro ipwctl.cro rarpd.cro timedc.cro comm.cro kill.cro rcmd.cro tip.cro compress.cro ksh.cro rcorder.cro top.cro cp.cro last.cro rcp.cro touch.cro cpuctl.cro less.cro rdate.cro tput.cro cron.cro lesskey.cro reboot.cro tr.cro crontab.cro ln.cro renice.cro traceroute.cro cut.cro lock.cro restore.cro trpt.cro date.cro lockstat.cro rexecd.cro tset.cro dc.cro logger.cro rlogin.cro tsort.cro dd.cro login.cro rlogind.cro tty.cro dev_mkdb.cro ls.cro rm.cro ttyflags.cro df.cro map-mbone.cro rmdir.cro umount.cro dhclient.cro mkdir.cro route.cro uname.cro dhcpd.cro mkfifo.cro rsh.cro uniq.cro dhcrelay.cro mknod.cro rshd.cro units.cro diff.cro mktemp.cro scp.cro unvis.cro diff3prog.cro mount.cro script.cro usbdevs.cro dirname.cro mount_cd9660.cro scsictl.cro usbhidaction.cro disklabel.cro mount_fdesc.cro sdiff.cro usbhidctl.cro dkctl.cro mount_ffs.cro sed.cro utmp_update.cro dmesg.cro mount_kernfs.cro seq.cro uudecode.cro domainname.cro mount_msdos.cro services_mkdb.cro uuencode.cro du.cro mount_nfs.cro sesd.cro vi.cro echo.cro mount_null.cro setencstat.cro vipw.cro ed.cro mount_overlay.cro sftp-server.cro vis.cro envstat.cro mount_procfs.cro sftp.cro vmstat.cro expr.cro mount_ptyfs.cro sh.cro w.cro fdisk.cro mount_tmpfs.cro shlock.cro wall.cro fgrep.cro mount_union.cro shutdown.cro wc.cro file.cro mrouted.cro skey.cro who.cro find.cro mt.cro skeyinfo.cro whois.cro fsck.cro mtrace.cro skeyinit.cro wiconfig.cro fsck_ffs.cro mv.cro slattach.cro window.cro fstat.cro nc.cro sleep.cro wlanctl.cro ftp.cro ndbootd.cro sliplogin.cro wpa_cli.cro ftpd.cro netstat.cro sntp.cro wpa_passphrase.cro getencstat.cro newfs.cro sockstat.cro wpa_supplicant.cro getty.cro newsyslog.cro sort.cro write.cro gkermit.cro nice.cro split.cro xargs.cro gpioctl.cro nohup.cro ssh-add.cro xinstall.cro grep.cro ntp-keygen.cro ssh-agent.cro yes.cro gzip.cro ntpd.cro ssh-keygen.cro head.cro ntpdate.cro ssh-keyscan.cro I only had to kick BIND out because of stupid conflicts with NTPD, but other than that there were no real problems. The whole root filesystem fits in 12.5MB, and stuffed into a kernel it is still well under 20MB netbsd-NET5501.EMBED: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, for NetBSD 5.2, not stripped 03:18 [97] $ size netbsd-NET5501.EMBED text data bss dec hex filename 4536955 13034660 430196 18001811 112af93 netbsd-NET5501.EMBED 03:18 [98] $ ls -l netbsd-NET5501.EMBED -rwxr-xr-x 1 woods wheel 18268428 Jun 5 2016 netbsd-NET5501.EMBED -- Greg A. Woods Planix, Inc. <woods%planix.com@localhost> +1 250 762-7675 http://www.planix.com/
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