source: extras/farce@ 2e2ac74

ablfs-more legacy trunk
Last change on this file since 2e2ac74 was 2e2ac74, checked in by Pierre Labastie <pierre@…>, 5 years ago

Add missing $Id:$ comments
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1#!/bin/bash
2
3# $Id$
4# Acknowledgment:
5# The following code is a no-modified version (except for this comment,
6# the `Id' comment, and the inline_doc fragment) of an original work written by
7# Ken Moffat and is included here with his permission.
8#
9
10# FARCE: Farce Assists Rebuild Comparison Evaluation ;)
11#
12# to answer the question "can it rebuild itself?"
13#
14# We expect four arguments - first directory path, filelist
15# containing the files in this directory which we wish to compare,
16# second directory path, filelist for second directory.
17#
18# Yes, we could just compare everything in each tree, but the
19# filelist script knows about files it can reasonably ignore,
20# and this also allows us to build a sytem, boot it and get a
21# list of files, build a full desktop environment, and only then
22# build and boot the "can it build itself" test system and get
23# _its_ filelist.
24#
25# What this script aims to do:
26# ____________________________
27#
28# First, report files not in both builds.
29#
30# Then, confirm symlinks point to same targets.
31#
32# After that, compare individual files -
33# if different, run the file name through 'expected'
34# to pick out files that are unlikely to match (logs,
35# pids, fstab [assumes '/' is a different device each time],
36# count these as 'expected'.
37#
38# For whatever is left, check the file type - ar archives
39# have their members extraced and compared (every member has
40# a timestamp), gzipped files are compared beyond their
41# timestamp, binaries, at least those using shared libs or
42# which are shared objects, are copied and subjected to
43# --strip-debug. If files match at this stage, count them as
44# 'accepted'.
45#
46# As a last step for any file that doesn't match, copy it
47# through some perl regexps to "process" it (convert any
48# date, time, kernel-version information from standard formats
49# into tokens, then see if the tokensi match.
50#
51# For details of the regexps, see the tokenize function.
52# Those files that match after this are also counted as
53# 'accepted'. Note that I don't always start from the kernel
54# version that I'm going to build, so this copes with e.g. perl
55# files that hardcode the kernel version.
56#
57# We now have files that don't match. A few of these seem to be
58# common to all builds - some (members of) c++ libraries or ar
59# archives, a few programs which perhaps use some sort of c++ code).
60# The file name # is passed to the 'failure' function - these
61# recognized filenames are labelled as 'predictable FAIL:',
62# anything else is labelled as 'unexpected FAIL:'.
63#
64# output:
65# stderr - files only in one of the builds, failure messages,
66# and totals.
67#
68# farce-results - more details, including which files were treated
69# as expected differences, files where neither copy could be read,
70# files treated as accepted, with the reason (and member for ar
71# archives). This data is typically up to 100 characters wide -
72# sometimes it's a bit more, but it doesn't wrap too badly in a
73# 100 character xterm.
74#
75# farce-extras - diffs for the files, or members, that didn't
76# match. This file is to establish new regexps for picking up
77# date/time/kernel-version formats.
78#
79# farce-identical - the names of the files which are identical
80#
81# farce-substitutions - whenever using tokenizeanddiff results in a
82# difference being accepted, for both versions diff the before and
83# after versions to show what got changed. If the file is a binary,
84# the output may still be hard to read. Note that I _know_ glibc
85# version strings pass one of the regexps looking for a kernel version
86# - since I expect you to use the same version of glibc for each
87# build, this is not a problem.
88#
89# farce-differ - the names of the files which could not be treated
90# as matching (whether or not I regard the failure as predictable)
91# for possible input to ICA processing.
92#
93# Copyright (C) 2005, 2006 Ken Moffat <ken@linuxfromscratch.org>
94#
95# All rights reserved.
96#
97# This program is free software; you can redistribute it and/or modify
98# it under the terms of the GNU General Public License as published by
99# the Free Software Foundation; either version 2 of the License, or (at
100# your option) any later version.
101#
102# This program is distributed in the hope that it will be useful, but
103# WITHOUT ANY WARRANTY; without even the implied warranty of
104# MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
105# NON INFRINGEMENT. See the GNU General Public License for more
106# details.
107#
108# You should have received a copy of the GNU General Public License
109# along with this program; if not, write to the Free Software
110# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
111#
112
113: <<inline_doc
114 desc: do farce analisys and report
115 usage: farce -directory $FARCELOGDIR/dir path1 list1 path2 list2
116 input vars: $1 farce log dir for this comparation
117 $2 full path to previous iteration
118 $3 full path to filelist for previos iteration
119 $4 full path to current iteration
120 $5 full path to filelist for current iteration
121 externals: --
122 modifies: --
123 returns: --
124 on error:
125 on success:
126inline_doc
127
128
129VERSION="002"
130
131# variables for output files
132RESULT=farce-results
133EXTRAS=farce-extras
134IDENTICAL=farce-identical
135SUBS=farce-substitutions
136DIFFER=farce-differ
137
138# documenting the variables
139# C1, C2 temp files to hold disassembled code
140# D1, D2 temp directories for extracting member of ar archive
141# DIFF temp file for diffing the filelists
142# F1, F2 temp files for tokenizeanddiff
143# FTYPE obsolete, commented out
144# M1, M2 temp files to hold members of an ar archive
145# MEMBERS temp file to list members of ar archive
146# OP1, OP2 the original $PWD, needed when extracting members of ar
147# archives
148# P1, P2 paths to first and second build
149# S1, S2 temp files for shared objects
150
151# functions
152function dohelp() {
153 echo "`basename $0`: compare trees of files from a build"
154 echo "and lists of the files they contained"
155 echo ""
156 echo "`basename $0` [ -help | -version ] || path1 list1 path2 list2"
157}
158
159function emessage() {
160 # write a string to both stderr and $RESULT
161 echo "$@" >&2
162 echo "$@" >&5
163}
164
165function expected() {
166 # if we expect it to differ because of its name,
167 # allow it and report, return true ; else return false
168 case $1 in
169 /boot/grub/menu.lst)
170 # just in case somebody puts this into the main filesystem
171 true;;
172 /etc/aliases.db)
173 # some sort of database for postfix, not parsable
174 true;;
175 /etc/blkid.tab)
176 # includes dev name for rootfs
177 true;;
178 /etc/fstab)
179 # fstab, e.g. ' / ' will differ
180 true;;
181 /etc/group*)
182 true;;
183 /etc/hosts)
184 # with dhcp client, I add current ip address to this in a hook
185 true;;
186 /etc/ld.so.*)
187 # .conf and .cache can vary,
188 # particularly if one system has a full build when I run this
189 true;;
190 /etc/lilo.conf|/etc/yaboot.conf)
191 # bootloader control, I assume grub will all be on a separate
192 true;;
193 /etc/mtab)
194 # at a minimum, different '/'
195 true;;
196 /etc/ntp.drift)
197 true;;
198 /etc/passwd*)
199 true;;
200 /etc/shadow*)
201 true;;
202 /etc/ssh/*key|/etc/ssh/*pub)
203 # openssh keys
204 true;;
205 /misc/*)
206 # where I put buildscripts (which mostly won't change)
207 # and stamps containing name/time/space which will differ in the times
208 true;;
209 /root/*)
210 # expect .bash_history etc to differ - if we can read them
211 true;;
212 /usr/bin/lynx)
213 # part of my inital builds, I guess this uses anonymous namespaces
214 true;;
215 /usr/include/c++/*/*/bits/stdc++.h.gch/*)
216 # precompiled headers
217 true;;
218 /usr/lib*/libstdc++.a|/usr/lib*/libstdc++.so*|/usr/lib*/libsupc++.a)
219 # probably, anonymous namespaces
220 # libstdc++.a, libstdc++.so.n.n.n, libsupc++.a
221 true;;
222 /usr/share/info/dir)
223 # if one system has had extra stuff built, this will likely be bigger
224 true;;
225 /usr/share/man/whatis)
226 # if one system has had extra stuff built, this will likely be bigger
227 true;;
228 /var/lib/locate/locatedb)
229 # if one system has had extra stuff built, this will likely be bigger
230 true;;
231 /var/lib/nfs/*)
232 # allow nfs bookkeeping
233 true;;
234 /var/log/*)
235 true;;
236 /var/run/utmp)
237 true;;
238 /var/spool/fcron*)
239 true;;
240 /var/state/*)
241 # allow dhcp leases
242 true;;
243 /var/tmp/random-seed)
244 true;;
245 # following start with wildcards
246 *Image*|*.PPCBoot*|*vmlinuz*|*lfskernel*)
247 # compressed kernels, sometimes just building at a different
248 # date/time is enough to change the length of them, because the
249 # long format date and time is part of the compressed data
250 true;;
251 *pid*)
252 # pids, including e.g. /var/spool/postfix/pid/*
253 true;;
254 *)
255 # nothing else is expected to be different
256 false;;
257 esac
258 if [ $? -eq 0 ]; then
259 message "expected difference in $1"
260 let expected=$expected+1
261 case $TYPE in
262 AR)
263 let EXPAR=$EXPAR+1
264 ;;
265 ELF)
266 let EXPELF=$EXPELF+1
267 ;;
268 UNK)
269 let EXPUNK=$EXPUNK+1
270 ;;
271 # so far, no other valid types, so don't accumulate them
272 *)
273 emessage "internal error, expected difference for $1 of type $TYPE not allowed"
274 exit 2
275 ;;
276 esac
277 true
278 else
279 false
280 fi
281}
282
283function failure() {
284 # first parm is filename or token
285 # second parm is the error message
286 # update the appropriate total
287 # and write to both stderr and the results
288 # by using emessage
289
290 let different=$different+1
291 case $TYPE in
292 AR)
293 let DIFAR=$DIFAR+1
294 ;;
295 ELF)
296 let DIFELF=$DIFELF+1
297 ;;
298 GZ)
299 let DIFGZ=$DIFGZ+1
300 ;;
301 SYM)
302 let DIFSYM=$DIFSYM+1
303 ;;
304 UNK)
305 let DIFUNK=$DIFUNK+1
306 ;;
307 *)
308 emessage "internal error in failure() for TYPE $TYPE"
309 exit 2
310 ;;
311 esac
312 test -f ${P1}$1 && echo $1 >&9
313 emessage "FAIL: $2"
314}
315
316function fatal() {
317 # unrecoverable error
318 echo $*
319 exit 1
320}
321
322function filetype() {
323 TYPE=`file ${P1}${FILE}`
324 case $TYPE in
325 *'current ar archive'*)
326 let TOTAR=$TOTAR+1
327 TYPE=AR
328 ;;
329 *' ELF '*)
330 let TOTELF=$TOTELF+1
331 TYPE=ELF
332 ;;
333 *'gzip compressed data'*)
334 let TOTGZ=$TOTGZ+1
335 TYPE=GZ
336 ;;
337 *)
338 let TOTUNK=$TOTUNK+1
339 TYPE=UNK
340 ;;
341 esac
342}
343
344function message() {
345 # write a string to $RESULT
346 echo $* >&5
347}
348
349function onlyone() {
350 #report files only in one build
351 # text should go to both stderr and the results,
352 # but blank lines only go to the results
353 if [ $1 == '<' ]; then
354 emessage "File(s) only in the first build"
355 else
356 emessage "File(s) only in the second build"
357 fi
358 message ""
359 FILES=`cat $DIFF | grep "^$1" | cut -d ' ' -f 2`
360 for F in $FILES; do
361 emessage $F
362 let only=$only+1
363 done
364 message ""
365}
366
367# 'test' functions are called with three arguments:
368# the two pathes and the filename
369# - we know the file is of this type, so see if we
370# can get it to match by reasonalbe means.
371# if not, treat it as different.
372#
373# NB if pathes are absolute, we need to prefix them
374# with the original $PWD to access the .a files
375#
376function testar() {
377 # ar archives include timestamps for the members,
378 # but diff doesn't show file timestamps unless the data differs
379 # put out a message to help locate which archive any messages
380 # about the members refer to.
381
382 # try just stripping them U1,2 undebuggable
383 U1=`mktemp` || fatal "cannot create a temporary file"
384 U2=`mktemp` || fatal "cannot create a temporary file"
385 cp ${1}${3} $U1
386 cp ${2}${3} $U2
387 strip --strip-debug $U1
388 strip --strip-debug $U2
389 cmp -s $U1 $U2
390 rm $U1 $U2
391 if [ $? -eq 0 ]; then
392 let accepted=$accepted+1
393 let ACCAR=$ACCAR+1
394 message "archive $3 matches after strip --strip-debug"
395 return
396 fi
397 # rest of this function retained primarily for pathologically bad builds
398 # put out a message in the log to help identify which archive has issues.
399 message "examining ar archive $3"
400 D1=`mktemp -d` || fatal "cannot create a temporary directory"
401 D2=`mktemp -d` || fatal "cannot create a temporary directory"
402 cd $D1
403 ar -x ${OP1}${1}${3}
404 cd $D2
405 ar -x ${OP2}${2}${3}
406 cd
407 # diff the members - true means they match
408 diff -Na $D1 $D2 >/dev/null
409 if [ $? -eq 0 ]; then
410 message "accept: $3 after diffing the members"
411 let accepted=$accepted+1
412 let ACCAR=$ACCAR+1
413 else
414 # process individual members to eliminate date/time/kernel-version
415 # first, check the members are the same
416 M1=`mktemp` || fatal "cannot create a temporary file"
417 M2=`mktemp` || fatal "cannot create a temporary file"
418 cd $D1
419 MEMBERS=
420 for F in *; do
421 MEMBERS="$MEMBERS $F"
422 done
423 cd
424 echo $MEMBERS | sort >$M1
425 cd $D2
426 MEMBERS=
427 for F in *; do
428 MEMBERS="$MEMBERS $F"
429 done
430 cd
431 echo $MEMBERS | sort >$M2
432 cmp -s $M1 $M2
433 if [ $? -ne 0 ]; then
434 # oh dear, different members
435 echo "list of members differs for archive $3" >&6
436 diff $M1 $M2 >&6
437 failure $3 "$3 list of members differs"
438 else
439 # members (names) are same,
440 # process each one
441 STATUS=0
442 for M in $MEMBERS; do
443 #avoid firing up perl on matching members
444 cmp -s $D1/$M $D2/$M
445 if [ $? -ne 0 ]; then
446 tokenizeanddiff $D1/$M $D2/$M $FILE:$M
447 if [ $? -eq 0 ]; then
448 message "member $M matches after processing"
449 else
450 message "member $M DIFFERS after processing"
451 STATUS=1
452 fi
453 fi
454 done
455 if [ $STATUS -eq 0 ]; then
456 let accepted=$accepted+1
457 let ACCAR=$ACCAR+1
458 else
459 let different=$different+1
460 let DIFAR=$DIFAR+1
461 echo $3 >&9
462 emessage "FAIL: in $3"
463 fi
464 fi
465 rm $M1 $M2
466 fi
467 rm -rf $D1 $D2
468}
469
470function testgzip() {
471 # bytes 4,5,6,7 are the timestamp, so ignore these
472 cmp -s -i 8 ${1}${3} ${2}${3}
473 if [ $? -eq 0 ]; then
474 message "accept: $3 after ignoring gzip timestamp"
475 let accepted=$accepted+1
476 let ACCGZ=$ACCGZ+1
477 else
478 failure $3 " $3 even after ignoring gzip timestamp"
479 fi
480}
481
482function testso() {
483 # shared object - first try stripping it
484 # in fact, this now handles ALL ELF files
485 S1=`mktemp` || fatal "cannot create a temporary file"
486 S2=`mktemp` || fatal "cannot create a temporary file"
487 cp ${1}${3} $S1
488 strip --strip-debug $S1
489 cp ${2}${3} $S2
490 strip --strip-debug $S2
491 cmp -s $S1 $S2
492 if [ $? -eq 0 ]; then
493 message "accept: $3 after --strip-debug"
494 let accepted=$accepted+1
495 let ACCELF=$ACCELF+1
496 else
497 tokenizeanddiff $S1 $S2 $3
498 if [ $? -ne 0 ]; then
499 failure $3 " $3 differs after stripping and processing"
500 else
501 message "accept: $3 after --strip-debug and processing"
502 let accepted=$accepted+1
503 let ACCELF=$ACCELF+1
504 fi
505 fi
506 rm $S1 $S2
507}
508
509function tokenize() {
510 # use regexes to replace date/time/kernel-version text
511 # with tokens which may allow files to match even though
512 # they have hardcoded date/time/kernel-version.
513 # arguments are file to process, and where to put it.
514 # these regexes are somewhat long, and the order they
515 # are applied in is important (to stop short ones being
516 # used when a longer version would match).
517 # KV00 linux version date (e.g. as in the kernel itself)
518 # allow 2 or 3 groups of three alphas here - optional smp, with day, mon
519 # KV01 kernel version, including possible cpu details (that is for cdda2wav)
520 # KV02 just the version, in quotes e.g. "2.6.12.6" or '2.6.13', for perl stuff
521 # except that "|' gives me grif, so try a boundary
522 # also, it might need local version on the end, I really want
523 # quote2.\d+.\d+.{0,32}quote - it is the quotes that don't work.
524 # DT00 Day Mon .d+ hh:mm:ss TZN CCYY variations include non-caps and 'mon d'
525 # DT01 Mon .d+ CCYY hh:mm:ss
526 # DT02 hh:mm:ss Mon .d CCYY
527 # DT03 Mon .d CCYY
528 # DT04 Day Mon { ,d}d hh:mm:ss CCYY - for groff example postscript files
529 # (somewhat similar to DT00, but ' d' or ' dd' for day of month and no TZN )
530 # DT05 hh:mm:ss
531 # DT06 ISO date using space as separator
532 # DT07 ISO date using dash as separator
533 # DT08 ISO date using slash as separator
534 # DT09 fullmonth (capitalised), day number, comma, 4-digit year (groff 1.18.1 ps)
535 # DT10 dd, fullmonth (capitalised), 4-digit year (groff 1.18.1 manpages)
536 # DT11 '(xample comma space digit(s) backslash ) in groff memef.ps which is
537 # quite clearly the day of the month when it was compiled, preceded by 'example'
538 # with something weird between the e and the x.
539
540 if [ $# -ne 2 ]; then
541 fatal "tokenizing called with $# arguments : $*"
542 fi
543
544 cat $1 | perl -p \
545 -e 's/(L|l)inux.*\d\.\d\.\d+.* \#\d+( [A-Za-z][a-z]{2}){2,3} \d+ \d\d:\d\d:\d\d [A-Za-z]{3} \d{4}\b/%KV00%/g;' \
546 -e 's/(L|l)inux( (\w|_)+)?(-| |_)\d\.\d(\.\d+){1,2}((-|_)?(\w|_)+)?( |\000)*/%KV01%/g;' \
547 -e 's/\W2(\.\d+){2,3}(-|_)?((\w|_)+)?\s*\W/%KV02%/g;' \
548 -e 's/\b([A-Za-z][a-z]{2} ){2}( |\d)?\d \d\d:\d\d:\d\d [A-Za-z]{3} \d{4}\b/%DT00%/g;' \
549 -e 's/\b[A-Z][a-z]{2} ( |\d)\d \d{4} \d\d:\d\d:\d\d\b/%DT01%/g;' \
550 -e 's/\b\d\d:\d\d:\d\d [A-Z][a-z]{2} ( |\d)\d \d{4}\b/%DT02%/g;' \
551 -e 's/\b[A-Z][a-z]{2} ( |\d)\d \d{4}\b/%DT03%/g;' \
552 -e 's/\b([A-Z][a-z]{2} ){2}( |\d)\d \d\d:\d\d:\d\d \d{4}/%DT04%/g;' \
553 -e 's/\b\d\d:\d\d:\d\d\b/%DT05%/g;' \
554 -e 's/\b\d{4} \d\d \d\d\b/%DT06%/g;' \
555 -e 's/\b\d{4}-\d\d-\d\d\b/%DT07%/g;' \
556 -e 's/\b\d{4}\/\d\d\/\d\d\b/%DT08%/g;' \
557 -e 's/\b[A-Z][a-z]{2,} \d{1,2}, \d{4}/%DT09%/g;' \
558 -e 's/\b\d\d [A-Z][a-z]{2,} \d{4}/%DT10%/g;' \
559 -e 's/\(xample, \d{1,2}\\\)/%DT11%/g;' \
560 >$2
561}
562
563function tokenizeanddiff() {
564 # Call tokenize for the inputs, then compare the results
565 # Input arguments are path/filename for old and new versions
566 # third parm is readable name (filename, or archivename:member)
567 # to help understand what is in the extras output.
568 # - sometimes called for files, but other times called for
569 # members of ar archives extracted into temporary directories
570 #message tokenizeanddiff called for $1 $2 $3
571 F1=`mktemp` || fatal "cannot create a temporary file"
572 F2=`mktemp` || fatal "cannot create a temporary file"
573 tokenize $1 $F1
574 tokenize $2 $F2
575
576 # actually, cmp is probably more efficient
577 # but for picking up the pieces it will be better to
578 # use diff to see what got through.
579 cmp -s $F1 $F2
580 TOKENRESULT=$?
581 if [ $TOKENRESULT -ne 0 ]; then
582 echo "failure in $3..." >&6
583 diff -a $F1 $F2 >&6
584 rm $F1 $F2
585 false
586 else
587 # show what we did
588 echo "substitutions for $3" >&8
589 echo "build one" >&8
590 diff -a $1 $F1 >&8
591 echo "build two" >&8
592 diff -a $2 $F2 >&8
593 rm $F1 $F2
594 true
595 fi
596}
597
598function validateargs() {
599# validate the arguments
600BAD=0
601if ! [ -d $1 ]; then
602 echo "Error: first argument is not a directory" >&2
603 let BAD=$BAD+1
604fi
605NAME=`basename ${2%%-*}`
606if [ $NAME != filelist ]; then
607 echo "Error: second argument is not a recognized filelist" >&2
608 let BAD=$BAD+1
609fi
610if ! [ -d $3 ]; then
611 echo "Error: third argument is not a directory" >&2
612 let BAD=$BAD+1
613fi
614NAME=`basename ${4%%-*}`
615if [ $NAME != filelist ]; then
616 echo "Error: fourth argument is not a recognized filelist" >&2
617 let BAD=$BAD+1
618fi
619for I in $1 $2 $3 $4; do
620 if ! [ -r $I ]; then
621 echo "Error: cannot read $I" >&2
622 let BAD=$BAD+1
623 fi
624done
625if [ $1 == $3 ]; then
626 echo "Error: directory pathes are identical" >&2
627 let BAD=$BAD+1
628fi
629if [ $2 == $4 ]; then
630 echo "Error: filelist names are identical" >&2
631 let BAD=$BAD+1
632fi
633if [ $BAD -eq 0 ]; then
634 ARGS=valid
635fi
636}
637
638# Mainline
639ARGS=unproven
640OUTDIR=
641if [ $# -eq 1 ]; then
642 case $1 in
643 -version|--version)
644 echo "`basename $0` version $VERSION"
645 exit 0
646 ;;
647 -help|--help)
648 dohelp
649 exit 0
650 ;;
651 esac
652fi
653if [ $1 = "--directory" ]; then
654 OUTDIR=$2
655 shift 2
656 grep '/$' $OUTDIR >/dev/null 2>&1 || OUTDIR=`echo $OUTDIR | sed 's%$%/%'`
657 echo "creating directory $OUTDIR"
658 mkdir -p $OUTDIR
659 if [ $? -ne 0 ]; then
660 echo "cannot mkdir $OUTDIR"
661 exit 1
662 fi
663fi
664if [ $# -eq 4 ]; then
665 validateargs $*
666fi
667if ! [ $ARGS == valid ]; then
668 dohelp
669 fatal "`basename $0`: error in arguments"
670fi
671
672# ok, we're happy, lets hit these files
673exec 5>${OUTDIR}$RESULT
674exec 6>${OUTDIR}$EXTRAS
675exec 7>${OUTDIR}$IDENTICAL
676exec 8>${OUTDIR}$SUBS
677exec 9>${OUTDIR}$DIFFER
678
679>${OUTDIR}$RESULT
680if [ $? -ne 0 ]; then
681 fatal "cannot write to ${OUTDIR}$RESULT"
682fi
683
684emessage "will compare:"
685emessage " first build at $1 with files listed in $2"
686emessage "second build at $3 with files listed in $4"
687
688let accepted=0
689let different=0
690let expected=0
691let matched=0
692let only=0
693let predictable=0
694let unreadable=0
695let total=0
696
697# break down the accepted
698let ACCAR=0
699let ACCELF=0
700let ACCGZ=0
701let ACCUNK=0
702
703# break down definitely different
704let DIFAR=0
705let DIFELF=0
706let DIFGZ=0
707let DIFSYM=0
708let DIFUNK=0
709
710# break down the expected differences
711let EXPAR=0
712let EXPELF=0
713let EXPGZ=0
714let EXPUNK=0
715
716# break down the identical files
717let MATAR=0
718let MATELF=0
719let MATGZ=0
720let MATSYM=0
721let MATUNK=0
722
723# break down how many of each type
724let TOTAR=0
725let TOTELF=0
726let TOTGZ=0
727let TOTSYM=0
728let TOTUNK=0
729
730# now identify differences between the two trees
731DIFF=`mktemp` || fatal "cannot create a temporary file"
732diff $2 $4 >$DIFF
733
734for RUN in '<' '>' ; do
735 grep -q "$RUN" $DIFF && onlyone "$RUN"
736done
737
738rm $DIFF
739
740# and compare them
741message "Results of file comparison:"
742message ""
743
744# Strip any trailing slash from the path for tidyness,
745# because the filenames all start with a slash. Unfortunately,
746# unfortunately, '/' becomes empty, which breaks subroutines,
747# so special case it.
748# also, to process ar archives we need to extract them in temp
749# directories - that means that after cd'ing we've broken any
750# relative path, so save original pwd as necessary.
751P1=`echo $1 | sed 's%/$%%'`
752echo $1 | grep '^/' >/dev/null
753if [ $? -ne 0 ]; then
754 # relative path
755 OP1=${PWD}/
756 #echo "setting OP1 to $OP1"
757else
758 OP1=
759 #echo "$1 is an absolute path"
760fi
761test -z "$P1" && P1='/'
762P2=`echo $3 | sed 's%/$%%'`
763echo $3 | grep '^/' >/dev/null
764if [ $? -ne 0 ]; then
765 # relative path
766 OP2=${PWD}/
767 #echo "setting OP2 to $OP2"
768else
769 OP2=
770 #echo "$3 is an absolute path"
771fi
772test -z "$P2" && P2='/'
773
774echo "about to read $2"
775while read FILE ; do
776#echo "process $FILE"
777#echo "test existence of ${P2}${FILE}"
778 # confirm it exists in second build
779 # we have already reported files only in one build
780 if [ -f ${P2}"${FILE}" ]; then
781 let total=$total+1
782 # check we can read both of them
783 # or count as unreadable - I used to separate only-one-unreadable,
784 # but if you compre '/' and a _copy_ of /mnt/lfs that assumption
785 # breaks, so be less picky.
786 if ! [ -r "${P1}${FILE}" ] || ! [ -r "${P2}${FILE}" ]; then
787 message "cannot read one or both versions of $FILE"
788 let unreadable=$unreadable+1
789 continue
790 fi
791 if [ -h "${P1}${FILE}" ]; then
792 # for symlink, look at what it points to
793 # exceptionally, do not call filetype
794 TYPE=SYM
795 let TOTSYM=$TOTSYM+1
796 SL1=`ls -l "${P1}${FILE}" | awk '{ print $11 }'`
797 SL2=`ls -l "${P2}${FILE}" | awk '{ print $11 }'`
798 if [ "$SL1" = "$SL2" ]; then
799 echo "symlink $FILE matches for $SL1" >&5
800 let matched=$matched+1
801 let MATSYM=$MATSYM+1
802 else
803 failure TARGET " symlink $FILE points to $SL1 and $SL2"
804 echo $FILE >&9
805 fi
806 else
807 # regular file, start by typing it for accounting,
808 # then compare it
809 filetype ${P1}${FILE}
810 cmp -s "${P1}${FILE}" "${P2}${FILE}"
811 if [ $? -eq 0 ]; then
812 let matched=$matched+1
813 case $TYPE in
814 AR)
815 let MATAR=$MATAR+1
816 ;;
817 ELF)
818 let MATELF=$MATELF+1
819 ;;
820 GZ)
821 let MATGZ=$MATGZ+1
822 ;;
823 UNK)
824 let MATUNK=$MATUNK+1
825 ;;
826 *)
827 echo "unexpected TYPE of $TYPE for $FILE" >&2
828 exit 2
829 ;;
830 esac
831 echo ${FILE} >&7
832 else
833 # seems different, can we do better ?
834 # test if we expect it to differ
835 expected $FILE
836 if [ $? -ne 0 ]; then
837 case $TYPE in
838 GZ)
839 testgzip $P1 $P2 $FILE ;;
840 AR)
841 testar $P1 $P2 $FILE ;;
842 ELF)
843 testso $P1 $P2 $FILE ;;
844 *)
845 # long-stop - strip dates from text files
846 tokenizeanddiff "${P1}${FILE}" "${P2}${FILE}" "$FILE"
847 if [ $? -eq 0 ]; then
848 message "accepted $FILE after processing"
849 let accepted=$accepted+1
850 let ACCUNK=$ACCUNK+1
851 else
852 failure "$FILE" " $FILE is different"
853 fi
854 ;;
855 esac
856 fi
857 fi
858 fi
859 fi
860done < $2
861
862message ""
863# write totals to stderr as well as the results file
864emessage "$only files in only one of the builds"
865emessage "$total files compared, of which"
866emessage "$unreadable files could not be read, skipped"
867emessage "$matched files are identical"
868emessage "$expected files differed as expected"
869emessage "$accepted files had allowable differences"
870#emessage "$predictable files differed as they normally do"
871emessage "$different files differed"
872
873# totals of different file types
874emessage ""
875emessage "$TOTAR ar archives"
876emessage " of which $MATAR are identical"
877emessage " of which $ACCAR are accepted after strip-debug or extracting, diffing, tokenizing"
878emessage " of which $EXPAR differed as expected"
879emessage " of which $DIFAR differed"
880emessage "$TOTELF ELF executables or shared libraries"
881emessage " of which $MATELF are identical"
882emessage " of which $ACCELF are accepted after stripping and tokenizing"
883emessage " of which $EXPELF differed as expected"
884emessage " of which $DIFELF differed"
885emessage "$TOTGZ gzipped files"
886emessage " of which $MATGZ are identical"
887emessage " of which $ACCGZ are accepted after comparing beyond timestamp"
888emessage " of which $DIFGZ are different"
889emessage "$TOTSYM symbolic links"
890emessage " of which $MATSYM are identical"
891emessage " of which $DIFSYM have different targets"
892emessage "$TOTUNK other files"
893emessage " of which $MATUNK are identical"
894emessage " of which $ACCUNK are accepted after tokenizing"
895emessage " of which $EXPUNK differed as expected"
896emessage " of which $DIFUNK differed"
897
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