sys-apps/busybox: version bump to 1.24.2 #577610

5 files changed, 516 insertions, 0 deletions

diff --git a/sys-apps/busybox/Manifest b/sys-apps/busybox/Manifest
index b8590e59145..f3487c10524 100644
--- a/sys-apps/busybox/Manifest
+++ b/sys-apps/busybox/Manifest
@@ -2,3 +2,4 @@ DIST busybox-1.21.0.tar.bz2 2200841 SHA256 eb9d268627783297f5f459cb9bd61a94e395d
 DIST busybox-1.23.1.tar.bz2 2252635 SHA256 300f1db0a7ca4ecee8f8d8027aba250b903372e8339b7d9123d37c1e900473bf SHA512 60849c220dde596c4197f16dd844573b24dd46c8544345a2d5a2b1976fa0ac340d22fbc97f5a1437b7de1c04f4e16aa07b3d62bc77eb83b2467582a50ed4b362 WHIRLPOOL 7cd25e42e74663849b094df699a72deaf02b1088064a511341f76aaa419c936557bbafd54523c6818082dfd4e17605f06ee51abed238ef57a56a9be12c910f99
 DIST busybox-1.23.2.tar.bz2 2252786 SHA256 05a6f9e21aad8c098e388ae77de7b2361941afa7157ef74216703395b14e319a SHA512 209c8ef26e40ccb81510f6b663202b080f9bbecac7faf386bbabf7e36a43d63b15dd6ce9f7a84c1ccc5345c524999812251da1e113ef9faadc6af1fedd24c7c9 WHIRLPOOL a0396f7f49ae702f1617e72d5d4646aceec4eba67219c7125bd8d0926d1acb1ef41ea15a7406c3cf5e5e0d8925cc75910ed5128e5fbdd257b80e2cb4f7a048a2
 DIST busybox-1.24.1.tar.bz2 2068803 SHA256 37d03132cc078937360b392170b7a1d0e5b322eee9f57c0b82292a8b1f0afe3d SHA512 3afc757ebaae61ae13c2c69097ee734717434f9e658eb77093a8b7b49af3326cbca2d723483ff84a1da99544b822fd2b47d9a97c68f09962e11754e5daf124ca WHIRLPOOL 5e827d08d737caac832e7e5923da624094ff27ee2edbb46dadc339e95edba65378a8fa3db412682724476a2092eee41a804f8f36c2eec0b9f883f5ba855f3ad0
+DIST busybox-1.24.2.tar.bz2 2066822 SHA256 e71ef53ec656f31c42633918d301405d40dea1d97eca12f272217ae4a971c855 SHA512 4d20fb68ee440be2855231c7fd5f3cb9dd9bfcc1a688f0b59cd3f7a55c8819e9cc44bd15f91500713571f2a84e5e44adc0fa8ae0ae3ebf63961dfc9e1c9ef8e0 WHIRLPOOL 2d89e3fded8d61567873acdb1e1e21888a4447e19c1b893543bbe82de52e8e3cf091adb10f34aa155da573994d89ae42f40ecce65ec0d32a641d103c8d8ce053
diff --git a/sys-apps/busybox/busybox-1.24.2.ebuild b/sys-apps/busybox/busybox-1.24.2.ebuild
new file mode 100644
index 00000000000..ade4b525c0a
--- /dev/null
+++ b/sys-apps/busybox/busybox-1.24.2.ebuild
@@ -0,0 +1,305 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+# See `man savedconfig.eclass` for info on how to use USE=savedconfig.
+
+EAPI="4"
+inherit eutils flag-o-matic savedconfig toolchain-funcs multilib
+
+DESCRIPTION="Utilities for rescue and embedded systems"
+HOMEPAGE="http://www.busybox.net/"
+if [[ ${PV} == "9999" ]] ; then
+	MY_P=${PN}
+	EGIT_REPO_URI="git://busybox.net/busybox.git"
+	inherit git-2
+else
+	MY_P=${PN}-${PV/_/-}
+	SRC_URI="http://www.busybox.net/downloads/${MY_P}.tar.bz2"
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-linux ~arm-linux ~x86-linux"
+fi
+
+LICENSE="GPL-2" # GPL-2 only
+SLOT="0"
+IUSE="debug ipv6 livecd make-symlinks math mdev pam selinux sep-usr static syslog systemd"
+RESTRICT="test"
+
+COMMON_DEPEND="!static? ( selinux? ( sys-libs/libselinux ) )
+	pam? ( sys-libs/pam )"
+DEPEND="${COMMON_DEPEND}
+	static? ( selinux? ( sys-libs/libselinux[static-libs(+)] ) )
+	>=sys-kernel/linux-headers-2.6.39"
+RDEPEND="${COMMON_DEPEND}
+	mdev? ( !<sys-apps/openrc-0.13 )"
+
+S=${WORKDIR}/${MY_P}
+
+busybox_config_option() {
+	local flag=$1 ; shift
+	if [[ ${flag} != [yn] ]] ; then
+		busybox_config_option $(usex ${flag} y n) "$@"
+		return
+	fi
+	while [[ $# -gt 0 ]] ; do
+		if [[ ${flag} == "y" ]] ; then
+			sed -i -e "s:.*\<CONFIG_$1\>.*set:CONFIG_$1=y:g" .config
+		else
+			sed -i -e "s:CONFIG_$1=y:# CONFIG_$1 is not set:g" .config
+		fi
+		einfo $(grep "CONFIG_$1[= ]" .config || echo Could not find CONFIG_$1 ...)
+		shift
+	done
+}
+
+busybox_config_enabled() {
+	local val=$(sed -n "/^CONFIG_$1=/s:^[^=]*=::p" .config)
+	case ${val} in
+	"") return 1 ;;
+	y)  return 0 ;;
+	*)  echo "${val}" | sed -r 's:^"(.*)"$:\1:' ;;
+	esac
+}
+
+src_prepare() {
+	unset KBUILD_OUTPUT #88088
+	append-flags -fno-strict-aliasing #310413
+	use ppc64 && append-flags -mminimal-toc #130943
+
+	# patches go here!
+	epatch "${FILESDIR}"/${PN}-1.19.0-bb.patch
+	epatch "${FILESDIR}"/busybox-1.24.1-trylink-ldflags.patch
+	epatch "${FILESDIR}"/busybox-1.24.2-ash-recursive-heredocs.patch
+	epatch "${FILESDIR}"/busybox-1.24.2-CVE-2016-2147.patch
+	epatch "${FILESDIR}"/busybox-1.24.2-CVE-2016-2148.patch
+	cp "${FILESDIR}"/ginit.c init/ || die
+
+	# flag cleanup
+	sed -i -r \
+		-e 's:[[:space:]]?-(Werror|Os|falign-(functions|jumps|loops|labels)=1|fomit-frame-pointer)\>::g' \
+		Makefile.flags || die
+	#sed -i '/bbsh/s:^//::' include/applets.h
+	sed -i '/^#error Aborting compilation./d' applets/applets.c || die
+	use elibc_glibc && sed -i 's:-Wl,--gc-sections::' Makefile
+	sed -i \
+		-e "/^CROSS_COMPILE/s:=.*:= ${CHOST}-:" \
+		-e "/^AR\>/s:=.*:= $(tc-getAR):" \
+		-e "/^CC\>/s:=.*:= $(tc-getCC):" \
+		-e "/^HOSTCC/s:=.*:= $(tc-getBUILD_CC):" \
+		-e "/^PKG_CONFIG\>/s:=.*:= $(tc-getPKG_CONFIG):" \
+		Makefile || die
+	sed -i \
+		-e 's:-static-libgcc::' \
+		Makefile.flags || die
+}
+
+src_configure() {
+	# check for a busybox config before making one of our own.
+	# if one exist lets return and use it.
+
+	restore_config .config
+	if [ -f .config ]; then
+		yes "" | emake -j1 -s oldconfig >/dev/null
+		return 0
+	else
+		ewarn "Could not locate user configfile, so we will save a default one"
+	fi
+
+	# setup the config file
+	emake -j1 -s allyesconfig >/dev/null
+	# nommu forces a bunch of things off which we want on #387555
+	busybox_config_option n NOMMU
+	sed -i '/^#/d' .config
+	yes "" | emake -j1 -s oldconfig >/dev/null
+
+	# now turn off stuff we really don't want
+	busybox_config_option n DMALLOC
+	busybox_config_option n FEATURE_SUID_CONFIG
+	busybox_config_option n BUILD_AT_ONCE
+	busybox_config_option n BUILD_LIBBUSYBOX
+	busybox_config_option n FEATURE_CLEAN_UP
+	busybox_config_option n MONOTONIC_SYSCALL
+	busybox_config_option n USE_PORTABLE_CODE
+	busybox_config_option n WERROR
+
+	# If these are not set and we are using a uclibc/busybox setup
+	# all calls to system() will fail.
+	busybox_config_option y ASH
+	busybox_config_option n HUSH
+
+	# disable ipv6 applets
+	if ! use ipv6; then
+		busybox_config_option n FEATURE_IPV6
+		busybox_config_option n TRACEROUTE6
+		busybox_config_option n PING6
+		busybox_config_option n UDHCPC6
+	fi
+
+	if use static && use pam ; then
+		ewarn "You cannot have USE='static pam'.  Assuming static is more important."
+	fi
+	busybox_config_option $(usex static n pam) PAM
+	busybox_config_option static STATIC
+	busybox_config_option syslog {K,SYS}LOGD LOGGER
+	busybox_config_option systemd FEATURE_SYSTEMD
+	busybox_config_option math FEATURE_AWK_LIBM
+
+	# all the debug options are compiler related, so punt them
+	busybox_config_option n DEBUG
+	busybox_config_option y NO_DEBUG_LIB
+	busybox_config_option n DMALLOC
+	busybox_config_option n EFENCE
+	busybox_config_option $(usex debug y n) TFTP_DEBUG
+
+	busybox_config_option selinux SELINUX
+
+	# this opt only controls mounting with <linux-2.6.23
+	busybox_config_option n FEATURE_MOUNT_NFS
+
+	# default a bunch of uncommon options to off
+	local opt
+	for opt in \
+		ADD_SHELL \
+		BEEP BOOTCHARTD \
+		CRONTAB \
+		DC DEVFSD DNSD DPKG{,_DEB} \
+		FAKEIDENTD FBSPLASH FOLD FSCK_MINIX FTP{GET,PUT} \
+		FEATURE_DEVFS \
+		HOSTID HUSH \
+		INETD INOTIFYD IPCALC \
+		LOCALE_SUPPORT LOGNAME LPD \
+		MAKEMIME MKFS_MINIX MSH \
+		OD \
+		RDEV READPROFILE REFORMIME REMOVE_SHELL RFKILL RUN_PARTS RUNSV{,DIR} \
+		SLATTACH SMEMCAP SULOGIN SV{,LOGD} \
+		TASKSET TCPSVD \
+		RPM RPM2CPIO \
+		UDPSVD UUDECODE UUENCODE
+	do
+		busybox_config_option n ${opt}
+	done
+
+	emake -j1 oldconfig > /dev/null
+}
+
+src_compile() {
+	unset KBUILD_OUTPUT #88088
+	export SKIP_STRIP=y
+
+	emake V=1 busybox
+}
+
+src_install() {
+	unset KBUILD_OUTPUT #88088
+	save_config .config
+
+	into /
+	dodir /bin
+	if use sep-usr ; then
+		# install /ginit to take care of mounting stuff
+		exeinto /
+		newexe busybox_unstripped ginit
+		dosym /ginit /bin/bb
+		dosym bb /bin/busybox
+	else
+		newbin busybox_unstripped busybox
+		dosym busybox /bin/bb
+	fi
+	if use mdev ; then
+		dodir /$(get_libdir)/mdev/
+		use make-symlinks || dosym /bin/bb /sbin/mdev
+		cp "${S}"/examples/mdev_fat.conf "${ED}"/etc/mdev.conf
+
+		exeinto /$(get_libdir)/mdev/
+		doexe "${FILESDIR}"/mdev/*
+
+		newinitd "${FILESDIR}"/mdev.initd mdev
+	fi
+	if use livecd ; then
+		dosym busybox /bin/vi
+	fi
+
+	# add busybox daemon's, bug #444718
+	if busybox_config_enabled FEATURE_NTPD_SERVER; then
+		newconfd "${FILESDIR}/ntpd.confd" "busybox-ntpd"
+		newinitd "${FILESDIR}/ntpd.initd" "busybox-ntpd"
+	fi
+	if busybox_config_enabled SYSLOGD; then
+		newconfd "${FILESDIR}/syslogd.confd" "busybox-syslogd"
+		newinitd "${FILESDIR}/syslogd.initd" "busybox-syslogd"
+	fi
+	if busybox_config_enabled KLOGD; then
+		newconfd "${FILESDIR}/klogd.confd" "busybox-klogd"
+		newinitd "${FILESDIR}/klogd.initd" "busybox-klogd"
+	fi
+	if busybox_config_enabled WATCHDOG; then
+		newconfd "${FILESDIR}/watchdog.confd" "busybox-watchdog"
+		newinitd "${FILESDIR}/watchdog.initd" "busybox-watchdog"
+	fi
+	if busybox_config_enabled UDHCPC; then
+		local path=$(busybox_config_enabled UDHCPC_DEFAULT_SCRIPT)
+		exeinto "${path%/*}"
+		newexe examples/udhcp/simple.script "${path##*/}"
+	fi
+	if busybox_config_enabled UDHCPD; then
+		insinto /etc
+		doins examples/udhcp/udhcpd.conf
+	fi
+
+	# bundle up the symlink files for use later
+	emake DESTDIR="${ED}" install
+	rm _install/bin/busybox
+	# for compatibility, provide /usr/bin/env
+	mkdir -p _install/usr/bin
+	ln -s /bin/env _install/usr/bin/env
+	tar cf busybox-links.tar -C _install . || : #;die
+	insinto /usr/share/${PN}
+	use make-symlinks && doins busybox-links.tar
+
+	dodoc AUTHORS README TODO
+
+	cd docs
+	docinto txt
+	dodoc *.txt
+	docinto pod
+	dodoc *.pod
+	dohtml *.html
+
+	cd ../examples
+	docinto examples
+	dodoc inittab depmod.pl *.conf *.script undeb unrpm
+}
+
+pkg_preinst() {
+	if use make-symlinks && [[ ! ${VERY_BRAVE_OR_VERY_DUMB} == "yes" ]] && [[ ${ROOT} == "/" ]] ; then
+		ewarn "setting USE=make-symlinks and emerging to / is very dangerous."
+		ewarn "it WILL overwrite lots of system programs like: ls bash awk grep (bug 60805 for full list)."
+		ewarn "If you are creating a binary only and not merging this is probably ok."
+		ewarn "set env VERY_BRAVE_OR_VERY_DUMB=yes if this is really what you want."
+		die "silly options will destroy your system"
+	fi
+
+	if use make-symlinks ; then
+		mv "${ED}"/usr/share/${PN}/busybox-links.tar "${T}"/ || die
+	fi
+}
+
+pkg_postinst() {
+	savedconfig_pkg_postinst
+
+	if use make-symlinks ; then
+		cd "${T}" || die
+		mkdir _install
+		tar xf busybox-links.tar -C _install || die
+		cp -vpPR _install/* "${ROOT}"/ || die "copying links for ${x} failed"
+	fi
+
+	if use sep-usr ; then
+		elog "In order to use the sep-usr support, you have to update your"
+		elog "kernel command line.  Add the option:"
+		elog "     init=/ginit"
+		elog "To launch a different init than /sbin/init, use:"
+		elog "     init=/ginit /sbin/yourinit"
+		elog "To get a rescue shell, you may boot with:"
+		elog "     init=/ginit bb"
+	fi
+}
diff --git a/sys-apps/busybox/files/busybox-1.24.2-CVE-2016-2147.patch b/sys-apps/busybox/files/busybox-1.24.2-CVE-2016-2147.patch
new file mode 100644
index 00000000000..2187c9b6732
--- /dev/null
+++ b/sys-apps/busybox/files/busybox-1.24.2-CVE-2016-2147.patch
@@ -0,0 +1,72 @@
+From 3c4de6e36c4d387a648622e7b828a05f2b1b47e6 Mon Sep 17 00:00:00 2001
+From: Denys Vlasenko <vda.linux@googlemail.com>
+Date: Fri, 26 Feb 2016 15:54:56 +0100
+Subject: [PATCH] udhcpc: fix OPTION_6RD parsing (could overflow its malloced
+ buffer)
+
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
+Signed-off-by: Mike Frysinger <vapier@gentoo.org>
+(cherry picked from commit 352f79acbd759c14399e39baef21fc4ffe180ac2)
+---
+ networking/udhcp/common.c | 15 +++++++++++++--
+ networking/udhcp/dhcpc.c  |  4 ++--
+ 2 files changed, 15 insertions(+), 4 deletions(-)
+
+diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
+index bc41c8d..680852c 100644
+--- a/networking/udhcp/common.c
++++ b/networking/udhcp/common.c
+@@ -142,7 +142,7 @@ const char dhcp_option_strings[] ALIGN1 =
+  * udhcp_str2optset: to determine how many bytes to allocate.
+  * xmalloc_optname_optval: to estimate string length
+  * from binary option length: (option[LEN] / dhcp_option_lengths[opt_type])
+- * is the number of elements, multiply in by one element's string width
++ * is the number of elements, multiply it by one element's string width
+  * (len_of_option_as_string[opt_type]) and you know how wide string you need.
+  */
+ const uint8_t dhcp_option_lengths[] ALIGN1 = {
+@@ -162,7 +162,18 @@ const uint8_t dhcp_option_lengths[] ALIGN1 = {
+ 	[OPTION_S32] =     4,
+ 	/* Just like OPTION_STRING, we use minimum length here */
+ 	[OPTION_STATIC_ROUTES] = 5,
+-	[OPTION_6RD] =    22,  /* ignored by udhcp_str2optset */
++	[OPTION_6RD] =    12,  /* ignored by udhcp_str2optset */
++	/* The above value was chosen as follows:
++	 * len_of_option_as_string[] for this option is >60: it's a string of the form
++	 * "32 128 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 255.255.255.255 ".
++	 * Each additional ipv4 address takes 4 bytes in binary option and appends
++	 * another "255.255.255.255 " 16-byte string. We can set [OPTION_6RD] = 4
++	 * but this severely overestimates string length: instead of 16 bytes,
++	 * it adds >60 for every 4 bytes in binary option.
++	 * We cheat and declare here that option is in units of 12 bytes.
++	 * This adds more than 60 bytes for every three ipv4 addresses - more than enough.
++	 * (Even 16 instead of 12 should work, but let's be paranoid).
++	 */
+ };
+ 
+ 
+diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
+index 915f659..2332b57 100644
+--- a/networking/udhcp/dhcpc.c
++++ b/networking/udhcp/dhcpc.c
+@@ -113,7 +113,7 @@ static const uint8_t len_of_option_as_string[] = {
+ 	[OPTION_IP              ] = sizeof("255.255.255.255 "),
+ 	[OPTION_IP_PAIR         ] = sizeof("255.255.255.255 ") * 2,
+ 	[OPTION_STATIC_ROUTES   ] = sizeof("255.255.255.255/32 255.255.255.255 "),
+-	[OPTION_6RD             ] = sizeof("32 128 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 255.255.255.255 "),
++	[OPTION_6RD             ] = sizeof("132 128 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 255.255.255.255 "),
+ 	[OPTION_STRING          ] = 1,
+ 	[OPTION_STRING_HOST     ] = 1,
+ #if ENABLE_FEATURE_UDHCP_RFC3397
+@@ -220,7 +220,7 @@ static NOINLINE char *xmalloc_optname_optval(uint8_t *option, const struct dhcp_
+ 	type = optflag->flags & OPTION_TYPE_MASK;
+ 	optlen = dhcp_option_lengths[type];
+ 	upper_length = len_of_option_as_string[type]
+-		* ((unsigned)(len + optlen - 1) / (unsigned)optlen);
++		* ((unsigned)(len + optlen) / (unsigned)optlen);
+ 
+ 	dest = ret = xmalloc(upper_length + strlen(opt_name) + 2);
+ 	dest += sprintf(ret, "%s=", opt_name);
+-- 
+2.7.4
+
diff --git a/sys-apps/busybox/files/busybox-1.24.2-CVE-2016-2148.patch b/sys-apps/busybox/files/busybox-1.24.2-CVE-2016-2148.patch
new file mode 100644
index 00000000000..08e08bec173
--- /dev/null
+++ b/sys-apps/busybox/files/busybox-1.24.2-CVE-2016-2148.patch
@@ -0,0 +1,55 @@
+From 3a76bb5136d05f94ee62e377aa723e63444912c7 Mon Sep 17 00:00:00 2001
+From: Denys Vlasenko <vda.linux@googlemail.com>
+Date: Thu, 10 Mar 2016 11:47:58 +0100
+Subject: [PATCH] udhcp: fix a SEGV on malformed RFC1035-encoded domain name
+
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
+Signed-off-by: Mike Frysinger <vapier@gentoo.org>
+(cherry picked from commit d474ffc68290e0a83651c4432eeabfa62cd51e87)
+---
+ networking/udhcp/domain_codec.c | 13 +++++++++----
+ 1 file changed, 9 insertions(+), 4 deletions(-)
+
+diff --git a/networking/udhcp/domain_codec.c b/networking/udhcp/domain_codec.c
+index c1325d8..8429367 100644
+--- a/networking/udhcp/domain_codec.c
++++ b/networking/udhcp/domain_codec.c
+@@ -63,11 +63,10 @@ char* FAST_FUNC dname_dec(const uint8_t *cstr, int clen, const char *pre)
+ 				if (crtpos + *c + 1 > clen) /* label too long? abort */
+ 					return NULL;
+ 				if (dst)
+-					memcpy(dst + len, c + 1, *c);
++					/* \3com ---> "com." */
++					((char*)mempcpy(dst + len, c + 1, *c))[0] = '.';
+ 				len += *c + 1;
+ 				crtpos += *c + 1;
+-				if (dst)
+-					dst[len - 1] = '.';
+ 			} else {
+ 				/* NUL: end of current domain name */
+ 				if (retpos == 0) {
+@@ -78,7 +77,10 @@ char* FAST_FUNC dname_dec(const uint8_t *cstr, int clen, const char *pre)
+ 					crtpos = retpos;
+ 					retpos = depth = 0;
+ 				}
+-				if (dst)
++				if (dst && len != 0)
++					/* \4host\3com\0\4host and we are at \0:
++					 * \3com was converted to "com.", change dot to space.
++					 */
+ 					dst[len - 1] = ' ';
+ 			}
+ 
+@@ -228,6 +230,9 @@ int main(int argc, char **argv)
+ 	int len;
+ 	uint8_t *encoded;
+ 
++        uint8_t str[6] = { 0x00, 0x00, 0x02, 0x65, 0x65, 0x00 };
++        printf("NUL:'%s'\n",   dname_dec(str, 6, ""));
++
+ #define DNAME_DEC(encoded,pre) dname_dec((uint8_t*)(encoded), sizeof(encoded), (pre))
+ 	printf("'%s'\n",       DNAME_DEC("\4host\3com\0", "test1:"));
+ 	printf("test2:'%s'\n", DNAME_DEC("\4host\3com\0\4host\3com\0", ""));
+-- 
+2.7.4
+
diff --git a/sys-apps/busybox/files/busybox-1.24.2-ash-recursive-heredocs.patch b/sys-apps/busybox/files/busybox-1.24.2-ash-recursive-heredocs.patch
new file mode 100644
index 00000000000..5405eafeaa9
--- /dev/null
+++ b/sys-apps/busybox/files/busybox-1.24.2-ash-recursive-heredocs.patch
@@ -0,0 +1,83 @@
+From 4194c2875310c13ee3ca2bb0e1aea6a2ae67c55a Mon Sep 17 00:00:00 2001
+From: Ron Yorston <rmy@pobox.com>
+Date: Thu, 29 Oct 2015 16:44:56 +0000
+Subject: [PATCH] ash: fix error during recursive processing of here document
+
+Save the value of the checkkwd flag to prevent it being clobbered
+during recursion.
+
+Based on commit ec2c84d from git://git.kernel.org/pub/scm/utils/dash/dash.git
+by Herbert Xu.
+
+function                                             old     new   delta
+readtoken                                            190     203     +13
+------------------------------------------------------------------------------
+(add/remove: 0/0 grow/shrink: 1/0 up/down: 13/0)               Total: 13 bytes
+
+Signed-off-by: Ron Yorston <rmy@pobox.com>
+Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
+Signed-off-by: Mike Frysinger <vapier@gentoo.org>
+(cherry picked from commit 713f07d906d9171953be0c12e2369869855b6ca6)
+---
+ shell/ash.c                               | 5 +++--
+ shell/ash_test/ash-heredoc/heredoc3.right | 1 +
+ shell/ash_test/ash-heredoc/heredoc3.tests | 9 +++++++++
+ 3 files changed, 13 insertions(+), 2 deletions(-)
+ create mode 100644 shell/ash_test/ash-heredoc/heredoc3.right
+ create mode 100755 shell/ash_test/ash-heredoc/heredoc3.tests
+
+diff --git a/shell/ash.c b/shell/ash.c
+index 8a1628e..256e933 100644
+--- a/shell/ash.c
++++ b/shell/ash.c
+@@ -11893,6 +11893,7 @@ static int
+ readtoken(void)
+ {
+ 	int t;
++	int kwd = checkkwd;
+ #if DEBUG
+ 	smallint alreadyseen = tokpushback;
+ #endif
+@@ -11906,7 +11907,7 @@ readtoken(void)
+ 	/*
+ 	 * eat newlines
+ 	 */
+-	if (checkkwd & CHKNL) {
++	if (kwd & CHKNL) {
+ 		while (t == TNL) {
+ 			parseheredoc();
+ 			t = xxreadtoken();
+@@ -11920,7 +11921,7 @@ readtoken(void)
+ 	/*
+ 	 * check for keywords
+ 	 */
+-	if (checkkwd & CHKKWD) {
++	if (kwd & CHKKWD) {
+ 		const char *const *pp;
+ 
+ 		pp = findkwd(wordtext);
+diff --git a/shell/ash_test/ash-heredoc/heredoc3.right b/shell/ash_test/ash-heredoc/heredoc3.right
+new file mode 100644
+index 0000000..ce01362
+--- /dev/null
++++ b/shell/ash_test/ash-heredoc/heredoc3.right
+@@ -0,0 +1 @@
++hello
+diff --git a/shell/ash_test/ash-heredoc/heredoc3.tests b/shell/ash_test/ash-heredoc/heredoc3.tests
+new file mode 100755
+index 0000000..96c227c
+--- /dev/null
++++ b/shell/ash_test/ash-heredoc/heredoc3.tests
+@@ -0,0 +1,9 @@
++echo hello >greeting
++cat <<EOF &&
++$(cat greeting)
++EOF
++{
++	echo $?
++	cat greeting
++} >/dev/null
++rm greeting
+-- 
+2.7.4
+