#!/bin/echo Try "scripts/mkroot.sh dropbear" # Example overlay file, adding dropbear (which requires zlib) echo === download source download a4d316c404ff54ca545ea71a27af7dbc29817088 \ http://downloads.sf.net/libpng/zlib-1.2.8.tar.gz download 820ec2b8c869edbcf5ad1138777fc0f54349505c \ https://matt.ucc.asn.au/dropbear/releases/dropbear-2019.78.tar.bz2 echo === Native build static zlib setupfor zlib # They keep checking in broken generated files. rm -f Makefile zconf.h && CC=${CROSS_COMPILE}cc LD=${CROSS_COMPILE}ld AS=${CROSS_COMPILE}as ./configure && make -j $(nproc) || exit 1 # do _not_ cleanup zlib, we need the files we just built for dropbear cd .. echo === $HOST Native build static dropbear setupfor dropbear # Repeat after me: "autoconf is useless" echo 'echo "$@"' > config.sub && ZLIB="$(echo ../zlib*)" && CFLAGS="-I $ZLIB -O2" LDFLAGS="-L $ZLIB" ./configure --enable-static \ --disable-wtmp --host=${CROSS_BASE%-} && sed -i 's@/usr/bin/dbclient@ssh@' options.h && sed -i 's@\(#define NON_INETD_MODE\) 1@\1 0@' default_options.h && make -j $(nproc) PROGRAMS="dropbear dbclient dropbearkey dropbearconvert scp" MULTI=1 SCPPROGRESS=1 && ${CROSS_COMPILE}strip dropbearmulti && mkdir -p "$ROOT"/{bin,etc/dropbear,var/log} && touch "$ROOT"/var/log/lastlog && cp dropbearmulti "$ROOT"/bin || exit 1 for i in "$ROOT"/bin/{ssh,dropbear,scp,dropbearkey} do ln -s dropbearmulti $i || exit 1 done cleanup rm -rf zlib-* # user root password root, user guest no password echo -e 'root:$1$939UTPzb$/PfVYAsF2Hqi/AQ3UBjbK/:::::::\nguest::::::::' > "$ROOT"/etc/shadow && chmod 600 "$ROOT"/etc/shadow && echo 'netcat -p 22 -L dropbear -iRB &' > "$ROOT"/etc/rc/dropbear && # file to run on host to ssh into guest echo 'ssh -o "UserKnownHostsFile=/dev/null" -o "StrictHostKeyChecking=no" ${1:+$1@}127.0.0.1 -p 2222' > "$OUTPUT"/ssh2dropbear.sh && chmod +x "$OUTPUT"/ssh2dropbear.sh # Forward 127.0.0.1:2222 into qemu instance QEMU_MORE="-nic user,hostfwd=tcp:127.0.0.1:2222-:22"