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johnm |
1.1 |
# Copyright 1999-2004 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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johnm |
1.2 |
# $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.1 2004/11/24 16:36:38 johnm Exp $
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johnm |
1.1 |
#
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# This eclass provides functions for querying the installed kernel
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# source version, selected kernel options etc.
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#
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ECLASS=linux-info
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INHERITED="$INHERITED $ECLASS"
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# Overwritable environment Var's
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# ---------------------------------------
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KERNEL_DIR="${KERNEL_DIR:-/usr/src/linux}"
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# File Functions
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# ---------------------------------------
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# getfilevar accepts 2 vars as follows:
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# getfilevar <VARIABLE> <CONFIGFILE>
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getfilevar() {
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local ERROR
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ERROR=0
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[ -z "${1}" ] && ERROR=1
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[ -z "${2}" ] && ERROR=1
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[ ! -f "${2}" ] && ERROR=1
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if [ "${ERROR}" = 1 ]
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then
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eerror "getfilevar requires 2 variables, with the second a valid file."
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eerror " getfilevar <VARIABLE> <CONFIGFILE>"
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else
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grep -e "^$1" $2 | sed 's: = :=:' | cut -d= -f2-
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fi
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}
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getfilevar_isset() {
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local RESULT
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RESULT="$(getfilevar ${1} ${2})"
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[ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
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}
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getfilevar_ismodule() {
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local RESULT
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RESULT="$(getfilevar ${1} ${2})"
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[ "${RESULT}" = "m" ] && return 0 || return 1
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}
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getfilevar_isbuiltin() {
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local RESULT
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RESULT="$(getfilevar ${1} ${2})"
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[ "${RESULT}" = "y" ] && return 0 || return 1
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}
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# Versioning Functions
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# ---------------------------------------
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# kernel_is returns true when the version is the same as the passed version
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#
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# For Example where KV = 2.6.9
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# kernel_is 2 4 returns false
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# kernel_is 2 returns true
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# kernel_is 2 6 returns true
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# kernel_is 2 6 8 returns false
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# kernel_is 2 6 9 returns true
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# got the jist yet?
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kernel_is() {
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# if we haven't determined the version yet, we need too.
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get_version;
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local RESULT
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RESULT=1
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if [ -n "${1}" ]
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then
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[ "${1}" = "${KV_MAJOR}" ] && RESULT=0
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fi
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if [ -n "${2}" ]
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then
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RESULT=1
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[ "${2}" = "${KV_MINOR}" ] && RESULT=0
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fi
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if [ -n "${3}" ]
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then
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RESULT=1
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[ "${3}" = "${KV_PATCH}" ] && RESULT=0
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fi
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return ${RESULT}
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}
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get_version() {
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# no need to execute this twice assuming KV_FULL is populated.
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# we can force by unsetting KV_FULL
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if [ -n "${KV_FULL}" ]
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then
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# Lets keep this quiet eh?
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# einfo "\${KV_FULL} is already set. Not running get_version again"
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return
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fi
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# if we dont know KV_FULL, then we need too.
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# make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
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unset KV_DIR
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# KV_DIR will contain the full path to the sources directory we should use
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einfo "Determining the location of the kernel source code"
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[ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
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[ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
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if [ -z "${KV_DIR}" ]
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then
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eerror "Unable to find kernel sources at ${KERNEL_DIR}"
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die
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fi
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# And contrary to existing functions I feel we shouldn't trust the
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# directory name to find version information as this seems insane.
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# so we parse ${KV_DIR}/Makefile
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KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)"
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KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)"
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KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)"
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KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)"
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# and in newer versions we can also pull LOCALVERSION if it is set.
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KV_LOCAL="$(cat ${KV_DIR}/localversion* 2>/dev/null)$(getfilevar CONFIG_LOCALVERSION ${KV_DIR}/.config | sed 's:"::g')"
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# And we should set KV_FULL to the full expanded version
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KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
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if [ -z "${KV_FULL}" ]
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then
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eerror "We are unable to find a usable kernel source tree in ${KV_DIR}"
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eerror "Please check a kernel source exists in this directory."
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die
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else
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einfo "Found kernel source directory:"
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einfo " ${KV_DIR}"
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einfo "with sources for kernel version:"
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einfo " ${KV_FULL}"
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fi
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}
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# ebuild check functions
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# ---------------------------------------
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check_kernel_built() {
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# if we haven't determined the version yet, we need too.
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get_version;
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if [ ! -f "${KV_DIR}/System.map" ]
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then
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eerror "These sources have not yet been compiled."
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eerror "We cannot build against an uncompiled tree."
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eerror "To resolve this, please type the following:"
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eerror
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eerror "# cd ${KV_DIR}"
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eerror "# make oldconfig"
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eerror "# make bzImage modules modules_install"
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eerror
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eerror "Then please try merging this module again."
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die "Kernel sources need compiling first"
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fi
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}
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check_modules_supported() {
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# if we haven't determined the version yet, we need too.
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get_version;
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getfilevar_isset CONFIG_MODULES ${KV_DIR}/.config
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if [ "$?" != 0 ]
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then
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eerror "These sources do not support loading external modules."
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eerror "to be able to use this module please enable \"Loadable modules support\""
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eerror "in your kernel, recompile and then try merging this module again."
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fi
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}
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check_zlibinflate() {
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# if we haven't determined the version yet, we need too.
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get_version;
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# although I restructured this code - I really really really dont support it!
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# bug #27882 - zlib routines are only linked into the kernel
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# if something compiled into the kernel calls them
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#
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# plus, for the cloop module, it appears that there's no way
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# to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
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# is on
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local INFLATE
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local DEFLATE
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einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
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ebegin "checking ZLIB_INFLATE"
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getfilevar_isbuiltin CONFIG_ZLIB_INFLATE ${KV_DIR}/.config
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eend $?
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[ "$?" != 0 ] && die
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ebegin "checking ZLIB_DEFLATE"
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getfilevar_isbuiltin CONFIG_ZLIB_DEFLATE ${KV_DIR}/.config
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eend $?
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[ "$?" != 0 ] && die
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local LINENO_START
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local LINENO_END
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local SYMBOLS
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local x
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LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
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LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
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(( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
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(( LINENO_END = $LINENO_END - 1 ))
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SYMBOLS="$(head -n $LINENO_END ${KERNEL_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
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# okay, now we have a list of symbols
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# we need to check each one in turn, to see whether it is set or not
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for x in $SYMBOLS ; do
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if [ "${!x}" = "y" ]; then
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# we have a winner!
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einfo "${x} ensures zlib is linked into your kernel - excellent"
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return 0
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fi
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done
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eerror
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eerror "This kernel module requires ZLIB library support."
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eerror "You have enabled zlib support in your kernel, but haven't enabled"
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eerror "enabled any option that will ensure that zlib is linked into your"
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eerror "kernel."
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eerror
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eerror "Please ensure that you enable at least one of these options:"
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eerror
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for x in $SYMBOLS ; do
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eerror " * $x"
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done
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eerror
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eerror "Please remember to recompile and install your kernel, and reboot"
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eerror "into your new kernel before attempting to load this kernel module."
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die "Kernel doesn't include zlib support"
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}
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