/[gentoo-x86]/eclass/linux-info.eclass
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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2004 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.1 2004/11/24 16:36:38 johnm Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.14 2004/12/29 11:22:41 johnm Exp $
4# 4#
5# This eclass provides functions for querying the installed kernel 5# Description: This eclass is used as a central eclass for accessing kernel
6# source version, selected kernel options etc. 6# related information for sources already installed.
7# It is vital for linux-mod to function correctly, and is split
8# out so that any ebuild behaviour "templates" are abstracted out
9# using additional eclasses.
7# 10#
11# Maintainer: John Mylchreest <johnm@gentoo.org>
12# Copyright 2004 Gentoo Linux
13#
14# Please direct your bugs to the current eclass maintainer :)
15
16# A Couple of env vars are available to effect usage of this eclass
17# These are as follows:
18#
19# Env Var Option Description
20# KERNEL_DIR <string> The directory containing kernel the target kernel
21# sources.
22# CONFIG_CHECK <string> a list of .config options to check for before
23# proceeding with the install. ie: CONFIG_CHECK="MTRR"
24# You can also check that an option doesn't exist by
25# prepending it with an exclamation mark (!).
26# ie: CONFIG_CHECK="!MTRR"
27# <CFG>_ERROR <string> The error message to display when the above check
28# fails. <CFG> should reference the appropriate option
29# as above. ie: MTRR_ERROR="MTRR exists in the .config
30# but shouldn't!!"
31# KBUILD_OUTPUT <string> This is passed on commandline, or can be set from
32# the kernel makefile. This contains the directory
33# which is to be used as the kernel object directory.
34
35# There are also a couple of variables which are set by this, and shouldn't be
36# set by hand. These are as follows:
37#
38# Env Var Option Description
39# KV_FULL <string> The full kernel version. ie: 2.6.9-gentoo-johnm-r1
40# KV_MAJOR <integer> The kernel major version. ie: 2
41# KV_MINOR <integer> The kernel minor version. ie: 6
42# KV_PATCH <integer> The kernel patch version. ie: 9
43# KV_EXTRA <string> The kernel EXTRAVERSION. ie: -gentoo
44# KV_LOCAL <string> The kernel LOCALVERSION concatenation. ie: -johnm
45# KV_DIR <string> The kernel source directory, will be null if
46# KERNEL_DIR is invalid.
47# KV_OUT_DIR <string> The kernel object directory. will be KV_DIR unless
48# koutput is used. This should be used for referencing
49# .config.
50
8 51
9ECLASS=linux-info 52ECLASS=linux-info
10INHERITED="$INHERITED $ECLASS" 53INHERITED="$INHERITED $ECLASS"
54EXPORT_FUNCTIONS pkg_setup
11 55
12# Overwritable environment Var's 56# Overwritable environment Var's
13# --------------------------------------- 57# ---------------------------------------
14KERNEL_DIR="${KERNEL_DIR:-/usr/src/linux}" 58KERNEL_DIR="${KERNEL_DIR:-/usr/src/linux}"
15 59
16 60
61# Pulled from eutils as it might be more useful only being here since
62# very few ebuilds which dont use this eclass will ever ever use these functions
63set_arch_to_kernel() {
64 export PORTAGE_ARCH="${ARCH}"
65 case ${ARCH} in
66 x86) export ARCH="i386";;
67 amd64) export ARCH="x86_64";;
68 hppa) export ARCH="parisc";;
69 mips) export ARCH="mips";;
70 *) export ARCH="${ARCH}";;
71 esac
72}
73
74# set's ARCH back to what portage expects
75set_arch_to_portage() {
76 export ARCH="${PORTAGE_ARCH}"
77}
78
79
80#
81# qeinfo "Message"
82# -------------------
83# qeinfo is a queit einfo call when EBUILD_PHASE
84# should not have visible output.
85#
86qeinfo() {
87 local outputmsg
88 outputmsg="${@}"
89 case "${EBUILD_PHASE}" in
90 depend) unset outputmsg;;
91 clean) unset outputmsg;;
92 preinst) unset outputmsg;;
93 esac
94 [ -n "${outputmsg}" ] && einfo "${outputmsg}"
95}
96
97qeerror() {
98 local outputmsg
99 outputmsg="${@}"
100 case "${EBUILD_PHASE}" in
101 depend) unset outputmsg;;
102 clean) unset outputmsg;;
103 preinst) unset outputmsg;;
104 esac
105 [ -n "${outputmsg}" ] && einfo "${outputmsg}"
106}
107
108
17 109
18# File Functions 110# File Functions
19# --------------------------------------- 111# ---------------------------------------
20 112
21# getfilevar accepts 2 vars as follows: 113# getfilevar accepts 2 vars as follows:
22# getfilevar <VARIABLE> <CONFIGFILE> 114# getfilevar <VARIABLE> <CONFIGFILE>
23 115
24getfilevar() { 116getfilevar() {
25local ERROR 117local ERROR workingdir basefname basedname xarch
26 ERROR=0 118 ERROR=0
27 119
28 [ -z "${1}" ] && ERROR=1 120 [ -z "${1}" ] && ERROR=1
29 [ -z "${2}" ] && ERROR=1
30 [ ! -f "${2}" ] && ERROR=1 121 [ ! -f "${2}" ] && ERROR=1
31 122
32 if [ "${ERROR}" = 1 ] 123 if [ "${ERROR}" = 1 ]
33 then 124 then
125 ebeep
126 echo -e "\n"
34 eerror "getfilevar requires 2 variables, with the second a valid file." 127 eerror "getfilevar requires 2 variables, with the second a valid file."
35 eerror " getfilevar <VARIABLE> <CONFIGFILE>" 128 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
36 else 129 else
37 grep -e "^$1" $2 | sed 's: = :=:' | cut -d= -f2- 130 workingdir=${PWD}
131 basefname=$(basename ${2})
132 basedname=$(dirname ${2})
133 xarch=${ARCH}
134 unset ARCH
135
136 cd ${basedname}
137 echo -e "include ${basefname}\ne:\n\t@echo \$(${1})" | \
138 make -f - e 2>/dev/null
139 cd ${workingdir}
140
141 ARCH=${xarch}
38 fi 142 fi
39} 143}
40 144
41getfilevar_isset() { 145linux_chkconfig_present() {
42local RESULT 146local RESULT
43 RESULT="$(getfilevar ${1} ${2})" 147 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
44 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1 148 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
45} 149}
46 150
47getfilevar_ismodule() { 151linux_chkconfig_module() {
48local RESULT 152local RESULT
49 RESULT="$(getfilevar ${1} ${2})" 153 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
50 [ "${RESULT}" = "m" ] && return 0 || return 1 154 [ "${RESULT}" = "m" ] && return 0 || return 1
51} 155}
52 156
53getfilevar_isbuiltin() { 157linux_chkconfig_builtin() {
54local RESULT 158local RESULT
55 RESULT="$(getfilevar ${1} ${2})" 159 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
56 [ "${RESULT}" = "y" ] && return 0 || return 1 160 [ "${RESULT}" = "y" ] && return 0 || return 1
161}
162
163linux_chkconfig_string() {
164 getfilevar "CONFIG_${1}" "${KV_OUT_DIR}/.config"
57} 165}
58 166
59# Versioning Functions 167# Versioning Functions
60# --------------------------------------- 168# ---------------------------------------
61 169
72 180
73kernel_is() { 181kernel_is() {
74 # if we haven't determined the version yet, we need too. 182 # if we haven't determined the version yet, we need too.
75 get_version; 183 get_version;
76 184
77 local RESULT 185 local RESULT operator test value
78 RESULT=1 186 RESULT=0
79 187
188 operator="="
189 if [ "${1}" == "lt" ]
190 then
191 operator="-lt"
192 shift
193 elif [ "${1}" == "gt" ]
194 then
195 operator="-gt"
196 shift
197 elif [ "${1}" == "le" ]
198 then
199 operator="-le"
200 shift
201 elif [ "${1}" == "ge" ]
202 then
203 operator="-ge"
204 shift
205 fi
206
80 if [ -n "${1}" ] 207 if [ -n "${1}" ]
81 then 208 then
82 [ "${1}" = "${KV_MAJOR}" ] && RESULT=0 209 value="${value}${1}"
210 test="${test}${KV_MAJOR}"
83 fi 211 fi
84
85 if [ -n "${2}" ] 212 if [ -n "${2}" ]
86 then 213 then
87 RESULT=1 214 value="${value}${2}"
88 [ "${2}" = "${KV_MINOR}" ] && RESULT=0 215 test="${test}${KV_MINOR}"
89 fi 216 fi
90
91 if [ -n "${3}" ] 217 if [ -n "${3}" ]
92 then 218 then
93 RESULT=1 219 value="${value}${3}"
94 [ "${3}" = "${KV_PATCH}" ] && RESULT=0 220 test="${test}${KV_PATCH}"
95 fi 221 fi
96 return ${RESULT} 222
223 [ ${test} ${operator} ${value} ] && return 0 || return 1
97} 224}
98 225
99get_version() { 226get_version() {
227 local kbuild_output
228
100 # no need to execute this twice assuming KV_FULL is populated. 229 # no need to execute this twice assuming KV_FULL is populated.
101 # we can force by unsetting KV_FULL 230 # we can force by unsetting KV_FULL
102 if [ -n "${KV_FULL}" ] 231 [ -n "${KV_FULL}" ] && return
103 then
104 # Lets keep this quiet eh?
105 # einfo "\${KV_FULL} is already set. Not running get_version again"
106 return
107 fi
108 232
109 # if we dont know KV_FULL, then we need too. 233 # if we dont know KV_FULL, then we need too.
110 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR 234 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
111 unset KV_DIR 235 unset KV_DIR
112 236
113 # KV_DIR will contain the full path to the sources directory we should use 237 # KV_DIR will contain the full path to the sources directory we should use
114 einfo "Determining the location of the kernel source code" 238 qeinfo "Determining the location of the kernel source code"
115 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})" 239 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
116 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}" 240 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
117 241
118 if [ -z "${KV_DIR}" ] 242 if [ -z "${KV_DIR}" ]
119 then 243 then
120 eerror "Unable to find kernel sources at ${KERNEL_DIR}" 244 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
121 die 245 qeinfo "This package requires Linux sources."
246 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
247 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
248 qeinfo "(or the kernel you wish to build against)."
249 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
250 else
251 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
122 fi 252 fi
253 die "Cannot locate Linux sources at ${KERNEL_DIR}"
254 fi
255
256 qeinfo "Found kernel source directory:"
257 qeinfo " ${KV_DIR}"
258
259 if [ ! -s "${KV_DIR}/Makefile" ]
260 then
261 qeerror "Could not find a Makefile in the kernel source directory."
262 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
263 die "Makefile not found in ${KV_DIR}"
264 fi
265
266 # OK so now we know our sources directory, but they might be using
267 # KBUILD_OUTPUT, and we need this for .config and localversions-*
268 # so we better find it eh?
269 # do we pass KBUILD_OUTPUT on the CLI?
270 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
271
272 # And if we didn't pass it, we can take a nosey in the Makefile
273 kbuild_output="$(getfilevar KBUILD_OUTPUT ${KV_DIR}/Makefile)"
274 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
123 275
124 # And contrary to existing functions I feel we shouldn't trust the 276 # And contrary to existing functions I feel we shouldn't trust the
125 # directory name to find version information as this seems insane. 277 # directory name to find version information as this seems insane.
126 # so we parse ${KV_DIR}/Makefile 278 # so we parse ${KV_DIR}/Makefile
127 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)" 279 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)"
128 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)" 280 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)"
129 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)" 281 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)"
130 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)" 282 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)"
283
284 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
285 then
286 qeerror "Could not detect kernel version."
287 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
288 die "Could not parse version info from ${KV_DIR}/Makefile"
289 fi
290
131 # and in newer versions we can also pull LOCALVERSION if it is set. 291 # and in newer versions we can also pull LOCALVERSION if it is set.
132 KV_LOCAL="$(cat ${KV_DIR}/localversion* 2>/dev/null)$(getfilevar CONFIG_LOCALVERSION ${KV_DIR}/.config | sed 's:"::g')" 292 # but before we do this, we need to find if we use a different object directory.
293 # This *WILL* break if the user is using localversions, but we assume it was
294 # caught before this if they are.
295 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}.${KV_EXTRA}" == "$(uname -r)" ] && \
296 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}.${KV_EXTRA}/build}"
297
298 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
299 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
300 if [ -n "${KV_OUT_DIR}" ];
301 then
302 qeinfo "Found kernel object directory:"
303 qeinfo " ${KV_OUT_DIR}"
304
305 KV_LOCAL="$(cat ${KV_OUT_DIR}/localversion* 2>/dev/null)"
306 fi
307 # and if we STILL haven't got it, then we better just set it to KV_DIR
308 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
309
310 KV_LOCAL="${KV_LOCAL}$(cat ${KV_DIR}/localversion* 2>/dev/null)"
311 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
312 KV_LOCAL="${KV_LOCAL//\"/}"
133 313
134 # And we should set KV_FULL to the full expanded version 314 # And we should set KV_FULL to the full expanded version
135 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}" 315 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
136 316
137 if [ -z "${KV_FULL}" ]
138 then
139 eerror "We are unable to find a usable kernel source tree in ${KV_DIR}"
140 eerror "Please check a kernel source exists in this directory."
141 die
142 else
143 einfo "Found kernel source directory:"
144 einfo " ${KV_DIR}"
145 einfo "with sources for kernel version:" 317 qeinfo "Found sources for kernel version:"
146 einfo " ${KV_FULL}" 318 qeinfo " ${KV_FULL}"
319
320 if [ ! -s "${KV_OUT_DIR}/.config" ]
321 then
322 qeerror "Could not find a usable .config in the kernel source directory."
323 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
324 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
325 qeerror "it points to the necessary object directory so that it might find .config."
326 die ".config not found in ${KV_OUT_DIR}"
147 fi 327 fi
148} 328}
149 329
150 330
151 331
155 335
156check_kernel_built() { 336check_kernel_built() {
157 # if we haven't determined the version yet, we need too. 337 # if we haven't determined the version yet, we need too.
158 get_version; 338 get_version;
159 339
160 if [ ! -f "${KV_DIR}/System.map" ] 340 if [ ! -f "${KV_OUT_DIR}/System.map" ]
161 then 341 then
162 eerror "These sources have not yet been compiled." 342 eerror "These sources have not yet been compiled."
163 eerror "We cannot build against an uncompiled tree." 343 eerror "We cannot build against an uncompiled tree."
164 eerror "To resolve this, please type the following:" 344 eerror "To resolve this, please type the following:"
165 eerror 345 eerror
174 354
175check_modules_supported() { 355check_modules_supported() {
176 # if we haven't determined the version yet, we need too. 356 # if we haven't determined the version yet, we need too.
177 get_version; 357 get_version;
178 358
179 getfilevar_isset CONFIG_MODULES ${KV_DIR}/.config 359 if ! linux_chkconfig_builtin "MODULES"
180 if [ "$?" != 0 ]
181 then 360 then
182 eerror "These sources do not support loading external modules." 361 eerror "These sources do not support loading external modules."
183 eerror "to be able to use this module please enable \"Loadable modules support\"" 362 eerror "to be able to use this module please enable \"Loadable modules support\""
184 eerror "in your kernel, recompile and then try merging this module again." 363 eerror "in your kernel, recompile and then try merging this module again."
364 die "No support for external modules in ${KV_FULL} config"
365 fi
366}
367
368check_extra_config() {
369local config negate error local_error
370
371 # if we haven't determined the version yet, we need too.
372 get_version;
373
374 einfo "Checking for suitable kernel configuration options"
375 for config in ${CONFIG_CHECK}
376 do
377 negate="${config:0:1}"
378 if [ "${negate}" == "!" ];
379 then
380 config="${config:1}"
381 if linux_chkconfig_present ${config}
382 then
383 local_error="${config}_ERROR"
384 local_error="${!local_error}"
385 [ -n "${local_error}" ] && eerror " ${local_error}" || \
386 eerror " CONFIG_${config}:\tshould not be set in the kernel configuration, but it is."
387 error=1
388 fi
389 else
390 if ! linux_chkconfig_present ${config}
391 then
392 local_error="${config}_ERROR"
393 local_error="${!local_error}"
394 [ -n "${local_error}" ] && eerror " ${local_error}" || \
395 eerror " CONFIG_${config}:\tshould be set in the kernel configuration, but isn't"
396 error=1
397 fi
398 fi
399 done
400
401 if [ -n "${error}" ] ;
402 then
403 eerror "Please check to make sure these options are set correctly."
404 eerror "Once you have satisfied these options, please try merging"
405 eerror "this package again."
406 die "Incorrect kernel configuration options"
185 fi 407 fi
186} 408}
187 409
188check_zlibinflate() { 410check_zlibinflate() {
189 # if we haven't determined the version yet, we need too. 411 # if we haven't determined the version yet, we need too.
221 443
222 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)" 444 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
223 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)" 445 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
224 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START )) 446 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
225 (( LINENO_END = $LINENO_END - 1 )) 447 (( LINENO_END = $LINENO_END - 1 ))
226 SYMBOLS="$(head -n $LINENO_END ${KERNEL_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')" 448 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
227 449
228 # okay, now we have a list of symbols 450 # okay, now we have a list of symbols
229 # we need to check each one in turn, to see whether it is set or not 451 # we need to check each one in turn, to see whether it is set or not
230 for x in $SYMBOLS ; do 452 for x in $SYMBOLS ; do
231 if [ "${!x}" = "y" ]; then 453 if [ "${!x}" = "y" ]; then
252 eerror "Please remember to recompile and install your kernel, and reboot" 474 eerror "Please remember to recompile and install your kernel, and reboot"
253 eerror "into your new kernel before attempting to load this kernel module." 475 eerror "into your new kernel before attempting to load this kernel module."
254 476
255 die "Kernel doesn't include zlib support" 477 die "Kernel doesn't include zlib support"
256} 478}
479
480################################
481# Default pkg_setup
482# Also used when inheriting linux-mod to force a get_version call
483
484linux-info_pkg_setup() {
485 get_version;
486 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
487}

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