/[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 1.3 2004/11/27 11:26:52 johnm Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/linux-info.eclass,v 1.12 2004/12/28 20:05:45 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}" "${KV_OUT_DIR}/.config"
57} 165}
58 166
59# Versioning Functions 167# Versioning Functions
60# --------------------------------------- 168# ---------------------------------------
61 169
72 180
73kernel_is() { 181kernel_is() {
74 # if we haven't determined the version yet, we need too. 182 # if we haven't determined the version yet, we need too.
75 get_version; 183 get_version;
76 184
77 local RESULT 185 local RESULT operator value test
78 RESULT=1 186 RESULT=0
79 187
188 operator="-eq"
189 if [ "${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 [ ${KV_MAJOR} ${operator} ${1} ] || RESULT=1
83 fi 210 fi
84
85 if [ -n "${2}" ] 211 if [ -n "${2}" ]
86 then 212 then
87 RESULT=1 213 [ ${KV_MINOR} ${operator} ${2} -a ${RESULT} -eq 0 ] || RESULT=1
88 [ "${2}" = "${KV_MINOR}" ] && RESULT=0
89 fi 214 fi
90
91 if [ -n "${3}" ] 215 if [ -n "${3}" ]
92 then 216 then
93 RESULT=1 217 [ ${KV_PATCH} ${operator} ${3} -a ${RESULT} -eq 0 ] || RESULT=1
94 [ "${3}" = "${KV_PATCH}" ] && RESULT=0
95 fi 218 fi
96 return ${RESULT} 219 return ${RESULT}
97} 220}
98 221
99get_version() { 222get_version() {
223 local kbuild_output
224
100 # no need to execute this twice assuming KV_FULL is populated. 225 # no need to execute this twice assuming KV_FULL is populated.
101 # we can force by unsetting KV_FULL 226 # we can force by unsetting KV_FULL
102 if [ -n "${KV_FULL}" ] 227 [ -n "${KV_FULL}" ] && return
103 then
104 # Lets keep this quiet eh?
105 # einfo "\${KV_FULL} is already set. Not running get_version again"
106 return
107 fi
108 228
109 # if we dont know KV_FULL, then we need too. 229 # if we dont know KV_FULL, then we need too.
110 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR 230 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
111 unset KV_DIR 231 unset KV_DIR
112 232
113 # KV_DIR will contain the full path to the sources directory we should use 233 # KV_DIR will contain the full path to the sources directory we should use
114 einfo "Determining the location of the kernel source code" 234 qeinfo "Determining the location of the kernel source code"
115 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})" 235 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
116 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}" 236 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
117 237
118 if [ -z "${KV_DIR}" ] 238 if [ -z "${KV_DIR}" ]
119 then 239 then
120 eerror "Unable to find kernel sources at ${KERNEL_DIR}" 240 qeerror "Unable to find kernel sources at ${KERNEL_DIR}"
121 die 241 qeinfo "This package requires Linux sources."
242 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
243 qeinfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
244 qeinfo "(or the kernel you wish to build against)."
245 qeinfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
246 else
247 qeinfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
122 fi 248 fi
249 die "Cannot locate Linux sources at ${KERNEL_DIR}"
250 fi
251
252 qeinfo "Found kernel source directory:"
253 qeinfo " ${KV_DIR}"
254
255 if [ ! -s "${KV_DIR}/Makefile" ]
256 then
257 qeerror "Could not find a Makefile in the kernel source directory."
258 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
259 die "Makefile not found in ${KV_DIR}"
260 fi
261
262 # OK so now we know our sources directory, but they might be using
263 # KBUILD_OUTPUT, and we need this for .config and localversions-*
264 # so we better find it eh?
265 # do we pass KBUILD_OUTPUT on the CLI?
266 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
267
268 # And if we didn't pass it, we can take a nosey in the Makefile
269 kbuild_output="$(getfilevar KBUILD_OUTPUT ${KV_DIR}/Makefile)"
270 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
123 271
124 # And contrary to existing functions I feel we shouldn't trust the 272 # And contrary to existing functions I feel we shouldn't trust the
125 # directory name to find version information as this seems insane. 273 # directory name to find version information as this seems insane.
126 # so we parse ${KV_DIR}/Makefile 274 # so we parse ${KV_DIR}/Makefile
127 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)" 275 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)"
128 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)" 276 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)"
129 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)" 277 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)"
130 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)" 278 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)"
279
280 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
281 then
282 qeerror "Could not detect kernel version."
283 qeerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
284 die "Could not parse version info from ${KV_DIR}/Makefile"
285 fi
286
131 # and in newer versions we can also pull LOCALVERSION if it is set. 287 # and in newer versions we can also pull LOCALVERSION if it is set.
132 KV_LOCAL="$(cat ${KV_DIR}/localversion* 2>/dev/null)$(getfilevar CONFIG_LOCALVERSION ${KV_DIR}/.config | sed 's:"::g')" 288 # but before we do this, we need to find if we use a different object directory.
289 # This *WILL* break if the user is using localversions, but we assume it was
290 # caught before this if they are.
291 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}.${KV_EXTRA}" == "$(uname -r)" ] && \
292 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}.${KV_EXTRA}/build}"
293
294 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
295 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
296 if [ -n "${KV_OUT_DIR}" ];
297 then
298 qeinfo "Found kernel object directory:"
299 qeinfo " ${KV_OUT_DIR}"
300
301 KV_LOCAL="$(cat ${KV_OUT_DIR}/localversion* 2>/dev/null)"
302 fi
303 # and if we STILL haven't got it, then we better just set it to KV_DIR
304 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
305
306 KV_LOCAL="${KV_LOCAL}$(cat ${KV_DIR}/localversion* 2>/dev/null)"
307 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
308 KV_LOCAL="${KV_LOCAL//\"/}"
133 309
134 # And we should set KV_FULL to the full expanded version 310 # And we should set KV_FULL to the full expanded version
135 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}" 311 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
136 312
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:" 313 qeinfo "Found sources for kernel version:"
146 einfo " ${KV_FULL}" 314 qeinfo " ${KV_FULL}"
315
316 if [ ! -s "${KV_OUT_DIR}/.config" ]
317 then
318 qeerror "Could not find a usable .config in the kernel source directory."
319 qeerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources."
320 qeerror "If you are using KBUILD_OUTPUT, please set the environment var so that"
321 qeerror "it points to the necessary object directory so that it might find .config."
322 die ".config not found in ${KV_OUT_DIR}"
147 fi 323 fi
148} 324}
149 325
150 326
151 327
155 331
156check_kernel_built() { 332check_kernel_built() {
157 # if we haven't determined the version yet, we need too. 333 # if we haven't determined the version yet, we need too.
158 get_version; 334 get_version;
159 335
160 if [ ! -f "${KV_DIR}/System.map" ] 336 if [ ! -f "${KV_OUT_DIR}/System.map" ]
161 then 337 then
162 eerror "These sources have not yet been compiled." 338 eerror "These sources have not yet been compiled."
163 eerror "We cannot build against an uncompiled tree." 339 eerror "We cannot build against an uncompiled tree."
164 eerror "To resolve this, please type the following:" 340 eerror "To resolve this, please type the following:"
165 eerror 341 eerror
174 350
175check_modules_supported() { 351check_modules_supported() {
176 # if we haven't determined the version yet, we need too. 352 # if we haven't determined the version yet, we need too.
177 get_version; 353 get_version;
178 354
179 getfilevar_isset CONFIG_MODULES ${KV_DIR}/.config 355 if ! linux_chkconfig_builtin "MODULES"
180 if [ "$?" != 0 ]
181 then 356 then
182 eerror "These sources do not support loading external modules." 357 eerror "These sources do not support loading external modules."
183 eerror "to be able to use this module please enable \"Loadable modules support\"" 358 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." 359 eerror "in your kernel, recompile and then try merging this module again."
185 die No support for external modules in ${KV_FUll} config 360 die "No support for external modules in ${KV_FULL} config"
186 fi 361 fi
187} 362}
188 363
189check_extra_config() { 364check_extra_config() {
190local config negate error 365local config negate error local_error
191 366
192 # if we haven't determined the version yet, we need too. 367 # if we haven't determined the version yet, we need too.
193 get_version; 368 get_version;
194 369
195 einfo "Checking for suitable kernel configuration options" 370 einfo "Checking for suitable kernel configuration options"
197 do 372 do
198 negate="${config:0:1}" 373 negate="${config:0:1}"
199 if [ "${negate}" == "!" ]; 374 if [ "${negate}" == "!" ];
200 then 375 then
201 config="${config:1}" 376 config="${config:1}"
202 if getfilevar_isset ${config} ${KV_DIR}/.config ; 377 if linux_chkconfig_present ${config}
203 then 378 then
379 local_error="${config}_ERROR"
380 local_error="${!local_error}"
381 [ -n "${local_error}" ] && eerror " ${local_error}" || \
204 eerror " ${config}:\tshould not be set in the kernel configuration, but it is." 382 eerror " CONFIG_${config}:\tshould not be set in the kernel configuration, but it is."
205 error=1 383 error=1
206 fi 384 fi
207 else 385 else
208 if ! getfilevar_isset ${config} ${KV_DIR}/.config ; 386 if ! linux_chkconfig_present ${config}
209 then 387 then
388 local_error="${config}_ERROR"
389 local_error="${!local_error}"
390 [ -n "${local_error}" ] && eerror " ${local_error}" || \
210 eerror " ${config}:\tshould be set in the kernel configuration, but isn't" 391 eerror " CONFIG_${config}:\tshould be set in the kernel configuration, but isn't"
211 error=1 392 error=1
212 fi 393 fi
213 fi 394 fi
214 done 395 done
215 396
216 if [ -n "${error}" ] ; 397 if [ -n "${error}" ] ;
217 then 398 then
218 eerror "Please check to make sure these options are set correctly." 399 eerror "Please check to make sure these options are set correctly."
219 eerror "Once you have satisfied these options, please try merging" 400 eerror "Once you have satisfied these options, please try merging"
220 eerror "this package again." 401 eerror "this package again."
221 die Incorrect kernel configuration options 402 die "Incorrect kernel configuration options"
222 fi 403 fi
223} 404}
224 405
225check_zlibinflate() { 406check_zlibinflate() {
226 # if we haven't determined the version yet, we need too. 407 # if we haven't determined the version yet, we need too.
258 439
259 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)" 440 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
260 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)" 441 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
261 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START )) 442 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
262 (( LINENO_END = $LINENO_END - 1 )) 443 (( LINENO_END = $LINENO_END - 1 ))
263 SYMBOLS="$(head -n $LINENO_END ${KERNEL_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')" 444 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
264 445
265 # okay, now we have a list of symbols 446 # okay, now we have a list of symbols
266 # we need to check each one in turn, to see whether it is set or not 447 # we need to check each one in turn, to see whether it is set or not
267 for x in $SYMBOLS ; do 448 for x in $SYMBOLS ; do
268 if [ "${!x}" = "y" ]; then 449 if [ "${!x}" = "y" ]; then
289 eerror "Please remember to recompile and install your kernel, and reboot" 470 eerror "Please remember to recompile and install your kernel, and reboot"
290 eerror "into your new kernel before attempting to load this kernel module." 471 eerror "into your new kernel before attempting to load this kernel module."
291 472
292 die "Kernel doesn't include zlib support" 473 die "Kernel doesn't include zlib support"
293} 474}
475
476################################
477# Default pkg_setup
478# Also used when inheriting linux-mod to force a get_version call
479
480linux-info_pkg_setup() {
481 get_version;
482 [ -n "${CONFIG_CHECK}" ] && check_extra_config;
483}

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