/[gentoo-x86]/eclass/linux-info.eclass
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Contents of /eclass/linux-info.eclass

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Revision 1.7 - (show annotations) (download)
Sun Dec 5 12:46:58 2004 UTC (9 years, 7 months ago) by johnm
Branch: MAIN
Changes since 1.6: +86 -33 lines
hopefully fixing bug 73088, changing function names as per dsds request. adding custom error messages for CONFIG_CHECK

1 # Copyright 1999-2004 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: $
4 #
5 # This eclass provides functions for querying the installed kernel
6 # source version, selected kernel options etc.
7 #
8
9 ECLASS=linux-info
10 INHERITED="$INHERITED $ECLASS"
11
12 # Overwritable environment Var's
13 # ---------------------------------------
14 KERNEL_DIR="${KERNEL_DIR:-/usr/src/linux}"
15
16
17 # Pulled from eutils as it might be more useful only being here since
18 # very few ebuilds which dont use this eclass will ever ever use these functions
19 set_arch_to_kernel() {
20 export PORTAGE_ARCH="${ARCH}"
21 case ${ARCH} in
22 x86) export ARCH="i386";;
23 amd64) export ARCH="x86_64";;
24 hppa) export ARCH="parisc";;
25 mips) export ARCH="mips";;
26 *) export ARCH="${ARCH}";;
27 esac
28 }
29
30 # set's ARCH back to what portage expects
31 set_arch_to_portage() {
32 export ARCH="${PORTAGE_ARCH}"
33 }
34
35 # File Functions
36 # ---------------------------------------
37
38 # getfilevar accepts 2 vars as follows:
39 # getfilevar <VARIABLE> <CONFIGFILE>
40
41 getfilevar() {
42 local ERROR workingdir basefname basedname xarch
43 ERROR=0
44
45 [ -z "${1}" ] && ERROR=1
46 [ ! -f "${2}" ] && ERROR=1
47
48 if [ "${ERROR}" = 1 ]
49 then
50 ebeep
51 echo -e "\n"
52 eerror "getfilevar requires 2 variables, with the second a valid file."
53 eerror " getfilevar <VARIABLE> <CONFIGFILE>"
54 else
55 workingdir=${PWD}
56 basefname=$(basename ${2})
57 basedname=$(dirname ${2})
58 xarch=${ARCH}
59 unset ARCH
60
61 cd ${basedname}
62 echo -e "include ${basefname}\ne:\n\t@echo \$(${1})" | \
63 make -f - e 2>/dev/null
64 cd ${workingdir}
65
66 ARCH=${xarch}
67 fi
68 }
69
70 linux_chkconfig_present() {
71 local RESULT
72 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
73 [ "${RESULT}" = "m" -o "${RESULT}" = "y" ] && return 0 || return 1
74 }
75
76 linux_chkconfig_module() {
77 local RESULT
78 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
79 [ "${RESULT}" = "m" ] && return 0 || return 1
80 }
81
82 linux_chkconfig_builtin() {
83 local RESULT
84 RESULT="$(getfilevar CONFIG_${1} ${KV_OUT_DIR}/.config)"
85 [ "${RESULT}" = "y" ] && return 0 || return 1
86 }
87
88 linux_chkconfig_string() {
89 getfilevar "CONFIG_${1}" "${KV_OUT_DIR}/.config"
90 }
91
92 # Versioning Functions
93 # ---------------------------------------
94
95 # kernel_is returns true when the version is the same as the passed version
96 #
97 # For Example where KV = 2.6.9
98 # kernel_is 2 4 returns false
99 # kernel_is 2 returns true
100 # kernel_is 2 6 returns true
101 # kernel_is 2 6 8 returns false
102 # kernel_is 2 6 9 returns true
103 #
104 # got the jist yet?
105
106 kernel_is() {
107 # if we haven't determined the version yet, we need too.
108 get_version;
109
110 local RESULT
111 RESULT=1
112
113 if [ -n "${1}" ]
114 then
115 [ "${1}" = "${KV_MAJOR}" ] && RESULT=0
116 fi
117
118 if [ -n "${2}" ]
119 then
120 RESULT=1
121 [ "${2}" = "${KV_MINOR}" ] && RESULT=0
122 fi
123
124 if [ -n "${3}" ]
125 then
126 RESULT=1
127 [ "${3}" = "${KV_PATCH}" ] && RESULT=0
128 fi
129 return ${RESULT}
130 }
131
132 get_version() {
133 local kbuild_output
134
135 # no need to execute this twice assuming KV_FULL is populated.
136 # we can force by unsetting KV_FULL
137 [ -n "${KV_FULL}" ] && return
138
139 # if we dont know KV_FULL, then we need too.
140 # make sure KV_DIR isnt set since we need to work it out via KERNEL_DIR
141 unset KV_DIR
142
143 # KV_DIR will contain the full path to the sources directory we should use
144 einfo "Determining the location of the kernel source code"
145 [ -h "${KERNEL_DIR}" ] && KV_DIR="$(readlink -f ${KERNEL_DIR})"
146 [ -d "${KERNEL_DIR}" ] && KV_DIR="${KERNEL_DIR}"
147
148 if [ -z "${KV_DIR}" ]
149 then
150 eerror "Unable to find kernel sources at ${KERNEL_DIR}"
151 einfo "This package requires Linux sources."
152 if [ "${KERNEL_DIR}" == "/usr/src/linux" ] ; then
153 einfo "Please make sure that ${KERNEL_DIR} points at your running kernel, "
154 einfo "(or the kernel you wish to build against)."
155 einfo "Alternatively, set the KERNEL_DIR environment variable to the kernel sources location"
156 else
157 einfo "Please ensure that the KERNEL_DIR environment variable points at full Linux sources of the kernel you wish to compile against."
158 fi
159 die "Cannot locate Linux sources at ${KERNEL_DIR}"
160 fi
161
162 einfo "Found kernel source directory:"
163 einfo " ${KV_DIR}"
164
165 if [ ! -s "${KV_DIR}/Makefile" ]
166 then
167 eerror "Could not find a Makefile in the kernel source directory."
168 eerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
169 die "Makefile not found in ${KV_DIR}"
170 fi
171
172 if [ ! -s "${KV_DIR}/.config" ]
173 then
174 eerror "Could not find a usable .config in the kernel source directory."
175 eerror "Please ensure that ${KERNEL_DIR} points to a configured set of Linux sources"
176 die ".config not found in ${KV_DIR}"
177 fi
178
179 # OK so now we know our sources directory, but they might be using
180 # KBUILD_OUTPUT, and we need this for .config and localversions-*
181 # so we better find it eh?
182 # do we pass KBUILD_OUTPUT on the CLI?
183 OUTPUT_DIR="${OUTPUT_DIR:-${KBUILD_OUTPUT}}"
184
185 # And if we didn't pass it, we can take a nosey in the Makefile
186 kbuild_output="$(getfilevar KBUILD_OUTPUT ${KV_DIR}/Makefile)"
187 OUTPUT_DIR="${OUTPUT_DIR:-${kbuild_output}}"
188
189 # And contrary to existing functions I feel we shouldn't trust the
190 # directory name to find version information as this seems insane.
191 # so we parse ${KV_DIR}/Makefile
192 KV_MAJOR="$(getfilevar VERSION ${KV_DIR}/Makefile)"
193 KV_MINOR="$(getfilevar PATCHLEVEL ${KV_DIR}/Makefile)"
194 KV_PATCH="$(getfilevar SUBLEVEL ${KV_DIR}/Makefile)"
195 KV_EXTRA="$(getfilevar EXTRAVERSION ${KV_DIR}/Makefile)"
196
197 if [ -z "${KV_MAJOR}" -o -z "${KV_MINOR}" -o -z "${KV_PATCH}" ]
198 then
199 eerror "Could not detect kernel version."
200 eerror "Please ensure that ${KERNEL_DIR} points to a complete set of Linux sources"
201 die "Could not parse version info from ${KV_DIR}/Makefile"
202 fi
203
204 # and in newer versions we can also pull LOCALVERSION if it is set.
205 # but before we do this, we need to find if we use a different object directory.
206 # This *WILL* break if the user is using localversions, but we assume it was
207 # caught before this if they are.
208 [ "${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}.${KV_EXTRA}" == "$(uname -r)" ] && \
209 OUTPUT_DIR="${OUTPUT_DIR:-/lib/modules/${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}.${KV_EXTRA}/build}"
210
211 [ -h "${OUTPUT_DIR}" ] && KV_OUT_DIR="$(readlink -f ${OUTPUT_DIR})"
212 [ -d "${OUTPUT_DIR}" ] && KV_OUT_DIR="${OUTPUT_DIR}"
213 if [ -n "${KV_OUT_DIR}" ];
214 then
215 einfo "Found kernel object directory:"
216 einfo " ${KV_OUT_DIR}"
217
218 KV_LOCAL="$(cat ${KV_OUT_DIR}/localversion* 2>/dev/null)"
219 fi
220 # and if we STILL haven't got it, then we better just set it to KV_DIR
221 KV_OUT_DIR="${KV_OUT_DIR:-${KV_DIR}}"
222
223 KV_LOCAL="${KV_LOCAL}$(cat ${KV_DIR}/localversion* 2>/dev/null)"
224 KV_LOCAL="${KV_LOCAL}$(linux_chkconfig_string LOCALVERSION)"
225 KV_LOCAL="${KV_LOCAL//\"/}"
226
227 # And we should set KV_FULL to the full expanded version
228 KV_FULL="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${KV_EXTRA}${KV_LOCAL}"
229
230 einfo "Found sources for kernel version:"
231 einfo " ${KV_FULL}"
232 }
233
234
235
236
237 # ebuild check functions
238 # ---------------------------------------
239
240 check_kernel_built() {
241 # if we haven't determined the version yet, we need too.
242 get_version;
243
244 if [ ! -f "${KV_OUT_DIR}/System.map" ]
245 then
246 eerror "These sources have not yet been compiled."
247 eerror "We cannot build against an uncompiled tree."
248 eerror "To resolve this, please type the following:"
249 eerror
250 eerror "# cd ${KV_DIR}"
251 eerror "# make oldconfig"
252 eerror "# make bzImage modules modules_install"
253 eerror
254 eerror "Then please try merging this module again."
255 die "Kernel sources need compiling first"
256 fi
257 }
258
259 check_modules_supported() {
260 # if we haven't determined the version yet, we need too.
261 get_version;
262
263 if ! linux_chkconfig_builtin "MODULES"
264 then
265 eerror "These sources do not support loading external modules."
266 eerror "to be able to use this module please enable \"Loadable modules support\""
267 eerror "in your kernel, recompile and then try merging this module again."
268 die "No support for external modules in ${KV_FULL} config"
269 fi
270 }
271
272 check_extra_config() {
273 local config negate error local_error
274
275 # if we haven't determined the version yet, we need too.
276 get_version;
277
278 einfo "Checking for suitable kernel configuration options"
279 for config in ${CONFIG_CHECK}
280 do
281 negate="${config:0:1}"
282 if [ "${negate}" == "!" ];
283 then
284 config="${config:1}"
285 if linux_chkconfig_present ${config}
286 then
287 local_error="${config}_ERROR"
288 local_error="${!local_error}"
289 [ -n "${local_error}" ] && eerror " ${local_error}" || \
290 eerror " CONFIG_${config}:\tshould not be set in the kernel configuration, but it is."
291 error=1
292 fi
293 else
294 if ! linux_chkconfig_present ${config}
295 then
296 local_error="${config}_ERROR"
297 local_error="${!local_error}"
298 [ -n "${local_error}" ] && eerror " ${local_error}" || \
299 eerror " CONFIG_${config}:\tshould be set in the kernel configuration, but isn't"
300 error=1
301 fi
302 fi
303 done
304
305 if [ -n "${error}" ] ;
306 then
307 eerror "Please check to make sure these options are set correctly."
308 eerror "Once you have satisfied these options, please try merging"
309 eerror "this package again."
310 die "Incorrect kernel configuration options"
311 fi
312 }
313
314 check_zlibinflate() {
315 # if we haven't determined the version yet, we need too.
316 get_version;
317
318 # although I restructured this code - I really really really dont support it!
319
320 # bug #27882 - zlib routines are only linked into the kernel
321 # if something compiled into the kernel calls them
322 #
323 # plus, for the cloop module, it appears that there's no way
324 # to get cloop.o to include a static zlib if CONFIG_MODVERSIONS
325 # is on
326
327 local INFLATE
328 local DEFLATE
329
330 einfo "Determining the usability of ZLIB_INFLATE support in your kernel"
331
332 ebegin "checking ZLIB_INFLATE"
333 getfilevar_isbuiltin CONFIG_ZLIB_INFLATE ${KV_DIR}/.config
334 eend $?
335 [ "$?" != 0 ] && die
336
337 ebegin "checking ZLIB_DEFLATE"
338 getfilevar_isbuiltin CONFIG_ZLIB_DEFLATE ${KV_DIR}/.config
339 eend $?
340 [ "$?" != 0 ] && die
341
342
343 local LINENO_START
344 local LINENO_END
345 local SYMBOLS
346 local x
347
348 LINENO_END="$(grep -n 'CONFIG_ZLIB_INFLATE y' ${KV_DIR}/lib/Config.in | cut -d : -f 1)"
349 LINENO_START="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | grep -n 'if \[' | tail -n 1 | cut -d : -f 1)"
350 (( LINENO_AMOUNT = $LINENO_END - $LINENO_START ))
351 (( LINENO_END = $LINENO_END - 1 ))
352 SYMBOLS="$(head -n $LINENO_END ${KV_DIR}/lib/Config.in | tail -n $LINENO_AMOUNT | sed -e 's/^.*\(CONFIG_[^\" ]*\).*/\1/g;')"
353
354 # okay, now we have a list of symbols
355 # we need to check each one in turn, to see whether it is set or not
356 for x in $SYMBOLS ; do
357 if [ "${!x}" = "y" ]; then
358 # we have a winner!
359 einfo "${x} ensures zlib is linked into your kernel - excellent"
360 return 0
361 fi
362 done
363
364 eerror
365 eerror "This kernel module requires ZLIB library support."
366 eerror "You have enabled zlib support in your kernel, but haven't enabled"
367 eerror "enabled any option that will ensure that zlib is linked into your"
368 eerror "kernel."
369 eerror
370 eerror "Please ensure that you enable at least one of these options:"
371 eerror
372
373 for x in $SYMBOLS ; do
374 eerror " * $x"
375 done
376
377 eerror
378 eerror "Please remember to recompile and install your kernel, and reboot"
379 eerror "into your new kernel before attempting to load this kernel module."
380
381 die "Kernel doesn't include zlib support"
382 }

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