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  • Committer: Teddy Hogeborn
  • Date: 2015-05-23 20:18:34 UTC
  • mto: This revision was merged to the branch mainline in revision 756.
  • Revision ID: teddy@recompile.se-20150523201834-e89ex4ito93yni8x
mandos: Use multiprocessing module to run checkers.

For a long time, the Mandos server has occasionally logged the message
"ERROR: Child process vanished".  This was never a fatal error, but it
has been annoying and slightly worrying, since a definite cause was
not found.  One potential cause could be the "multiprocessing" and
"subprocess" modules conflicting w.r.t. SIGCHLD.  To avoid this,
change the running of checkers from using subprocess.Popen
asynchronously to instead first create a multiprocessing.Process()
(which is asynchronous) calling a function, and have that function
then call subprocess.call() (which is synchronous).  In this way, the
only thing using any asynchronous subprocesses is the multiprocessing
module.

This makes it necessary to change one small thing in the D-Bus API,
since the subprocesses.call() function does not expose the raw wait(2)
status value.

DBUS-API (CheckerCompleted): Change the second value provided by this
                             D-Bus signal from the raw wait(2) status
                             to the actual terminating signal number.
mandos (subprocess_call_pipe): New function to be called by
                               multiprocessing.Process (starting a
                               separate process).
(Client.last_checker signal): New attribute for signal which
                              terminated last checker.  Like
                              last_checker_status, only not accessible
                              via D-Bus.
(Client.checker_callback): Take new "connection" argument and use it
                           to get returncode; set last_checker_signal.
                           Return False so gobject does not call this
                           callback again.
(Client.start_checker): Start checker using a multiprocessing.Process
                        instead of a subprocess.Popen.
(ClientDBus.checker_callback): Take new "connection" argument.        Call
                               Client.checker_callback early to have
                               it set last_checker_status and
                               last_checker_signal; use those.  Change
                               second value provided to D-Bus signal
                               CheckerCompleted to use
                               last_checker_signal if checker was
                               terminated by signal.
mandos-monitor: Update to reflect DBus API change.
(MandosClientWidget.checker_completed): Take "signal" instead of
                                        "condition" argument.  Use it
                                        accordingly.  Remove dead code
                                        (os.WCOREDUMP case).

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WARN=-O -Wall -Wformat=2 -Winit-self -Wmissing-include-dirs \
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        -Wswitch-default -Wswitch-enum -Wunused-parameter \
3
 
        -Wstrict-aliasing=1 -Wextra -Wfloat-equal -Wundef -Wshadow \
 
1
WARN=-O -Wall -Wextra -Wdouble-promotion -Wformat=2 -Winit-self \
 
2
        -Wmissing-include-dirs -Wswitch-default -Wswitch-enum \
 
3
        -Wunused -Wuninitialized -Wstrict-overflow=5 \
 
4
        -Wsuggest-attribute=pure -Wsuggest-attribute=const \
 
5
        -Wsuggest-attribute=noreturn -Wfloat-equal -Wundef -Wshadow \
4
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        -Wunsafe-loop-optimizations -Wpointer-arith \
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        -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings \
6
 
        -Wconversion -Wstrict-prototypes -Wold-style-definition \
7
 
        -Wpacked -Wnested-externs -Winline -Wvolatile-register-var
8
 
#       -Wunreachable-code
 
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        -Wconversion -Wlogical-op -Waggregate-return \
 
9
        -Wstrict-prototypes -Wold-style-definition \
 
10
        -Wmissing-format-attribute -Wnormalized=nfc -Wpacked \
 
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        -Wredundant-decls -Wnested-externs -Winline -Wvla \
 
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        -Wvolatile-register-var -Woverlength-strings
9
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#DEBUG=-ggdb3
10
 
# For info about _FORTIFY_SOURCE, see
11
 
# <http://www.kernel.org/doc/man-pages/online/pages/man7/feature_test_macros.7.html>
 
14
# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
12
15
# and <http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
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FORTIFY=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
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LINK_FORTIFY_LD=-z relro -z now
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LINK_FORTIFY += -pie
21
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endif
22
25
#COVERAGE=--coverage
23
 
OPTIMIZE=-Os
 
26
OPTIMIZE=-Os -fno-strict-aliasing
24
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LANGUAGE=-std=gnu99
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28
htmldir=man
26
 
version=1.5.3
 
29
version=1.6.9
27
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SED=sed
28
31
 
29
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USER=$(firstword $(subst :, ,$(shell getent passwd _mandos || getent passwd nobody || echo 65534)))
36
39
# MANDIR=$(PREFIX)/man
37
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# INITRAMFSTOOLS=$(DESTDIR)/etc/initramfs-tools
38
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# STATEDIR=$(DESTDIR)/var/lib/mandos
 
42
# LIBDIR=$(PREFIX)/lib
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##
40
44
 
41
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## These settings are for a package-type install
45
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MANDIR=$(PREFIX)/share/man
46
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INITRAMFSTOOLS=$(DESTDIR)/usr/share/initramfs-tools
47
51
STATEDIR=$(DESTDIR)/var/lib/mandos
 
52
LIBDIR=$(shell \
 
53
        for d in \
 
54
        "/usr/lib/`dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null`" \
 
55
        "`rpm --eval='%{_libdir}' 2>/dev/null`" /usr/lib; do \
 
56
                if [ -d "$$d" -a "$$d" = "$${d%/}" ]; then \
 
57
                        echo "$(DESTDIR)$$d"; \
 
58
                        break; \
 
59
                fi; \
 
60
        done)
48
61
##
49
62
 
 
63
SYSTEMD=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
 
64
 
50
65
GNUTLS_CFLAGS=$(shell pkg-config --cflags-only-I gnutls)
51
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GNUTLS_LIBS=$(shell pkg-config --libs gnutls)
52
67
AVAHI_CFLAGS=$(shell pkg-config --cflags-only-I avahi-core)
56
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        getconf LFS_LDFLAGS)
57
72
 
58
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# Do not change these two
59
 
CFLAGS=$(WARN) $(DEBUG) $(FORTIFY) $(COVERAGE) $(OPTIMIZE) \
 
74
CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(COVERAGE) $(OPTIMIZE) \
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        $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(GPGME_CFLAGS) \
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        -DVERSION='"$(version)"'
62
 
LDFLAGS=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
 
77
LDFLAGS+=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
63
78
 
64
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# Commands to format a DocBook <refentry> document into a manual page
65
80
DOCBOOKTOMAN=$(strip cd $(dir $<); xsltproc --nonet --xinclude \
68
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        --param make.single.year.ranges         1 \
69
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        --param man.output.quietly              1 \
70
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        --param man.authors.section.enabled     0 \
71
 
         /usr/share/xml/docbook/stylesheet/nwalsh/manpages/docbook.xsl \
 
86
        /usr/share/xml/docbook/stylesheet/nwalsh/manpages/docbook.xsl \
72
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        $(notdir $<); \
73
 
        $(MANPOST) $(notdir $@);\
74
 
        LANG=en_US.UTF-8 MANWIDTH=80 man --warnings --encoding=UTF-8 \
75
 
        --local-file $(notdir $@) >/dev/null)
76
 
# DocBook-to-man post-processing to fix a '\n' escape bug
77
 
MANPOST=$(SED) --in-place --expression='s,\\\\en,\\en,g;s,\\n,\\en,g'
 
88
        if locale --all 2>/dev/null | grep --regexp='^en_US\.utf8$$' \
 
89
        && type man 2>/dev/null; then LANG=en_US.UTF-8 MANWIDTH=80 \
 
90
        man --warnings --encoding=UTF-8 --local-file $(notdir $@); \
 
91
        fi >/dev/null)
78
92
 
79
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DOCBOOKTOHTML=$(strip xsltproc --nonet --xinclude \
80
94
        --param make.year.ranges                1 \
225
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        $(LINK.c) $^ -lrt $(GNUTLS_LIBS) $(AVAHI_LIBS) $(strip\
226
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                ) $(GPGME_LIBS) $(LOADLIBES) $(LDLIBS) -o $@
227
241
 
228
 
.PHONY : all doc html clean distclean run-client run-server install \
229
 
        install-server install-client uninstall uninstall-server \
230
 
        uninstall-client purge purge-server purge-client
 
242
.PHONY : all doc html clean distclean mostlyclean maintainer-clean \
 
243
        check run-client run-server install install-html \
 
244
        install-server install-client-nokey install-client uninstall \
 
245
        uninstall-server uninstall-client purge purge-server \
 
246
        purge-client
231
247
 
232
248
clean:
233
249
        -rm --force $(CPROGS) $(objects) $(htmldocs) $(DOCS) core
239
255
 
240
256
check:  all
241
257
        ./mandos --check
 
258
        ./mandos-ctl --check
242
259
 
243
260
# Run the client with a local config and key
244
261
run-client: all keydir/seckey.txt keydir/pubkey.txt
247
264
        @echo "# ignored.  The messages are caused by not running as root, but   #"
248
265
        @echo "# you should NOT run \"make run-client\" as root unless you also    #"
249
266
        @echo "# unpacked and compiled Mandos as root, which is NOT recommended. #"
250
 
        @echo "# From plugin-runner: setuid: Operation not permitted             #"
 
267
        @echo "# From plugin-runner: setgid: Operation not permitted             #"
 
268
        @echo "#                     setuid: Operation not permitted             #"
251
269
        @echo "# From askpass-fifo:  mkfifo: Permission denied                   #"
252
 
        @echo "# From mandos-client: setuid: Operation not permitted             #"
253
 
        @echo "#                     seteuid: Operation not permitted            #"
254
 
        @echo "#                     klogctl: Operation not permitted            #"
 
270
        @echo "# From mandos-client:                                             #"
 
271
        @echo "#             Failed to raise privileges: Operation not permitted #"
 
272
        @echo "#             Warning: network hook \"*\" exited with status *      #"
255
273
        @echo "###################################################################"
 
274
# We set GNOME_KEYRING_CONTROL to block pam_gnome_keyring
256
275
        ./plugin-runner --plugin-dir=plugins.d \
257
276
                --config-file=plugin-runner.conf \
258
277
                --options-for=mandos-client:--seckey=keydir/seckey.txt,--pubkey=keydir/pubkey.txt,--network-hook-dir=network-hooks.d \
 
278
                --env-for=mandos-client:GNOME_KEYRING_CONTROL= \
259
279
                $(CLIENTARGS)
260
280
 
261
281
# Used by run-client
276
296
        install --directory confdir
277
297
        install --mode=u=rw $< $@
278
298
# Add a client password
279
 
        ./mandos-keygen --dir keydir --password >> $@
 
299
        ./mandos-keygen --dir keydir --password --no-ssh >> $@
280
300
statedir:
281
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        install --directory statedir
282
302
 
289
309
 
290
310
install-server: doc
291
311
        install --directory $(CONFDIR)
292
 
        install --directory --mode=u=rwx --owner=$(USER) \
293
 
                --group=$(GROUP) $(STATEDIR)
 
312
        if install --directory --mode=u=rwx --owner=$(USER) \
 
313
                --group=$(GROUP) $(STATEDIR); then \
 
314
                :; \
 
315
        elif install --directory --mode=u=rwx $(STATEDIR); then \
 
316
                chown -- $(USER):$(GROUP) $(STATEDIR) || :; \
 
317
        fi
294
318
        install --mode=u=rwx,go=rx mandos $(PREFIX)/sbin/mandos
295
319
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
296
320
                mandos-ctl
304
328
                $(DESTDIR)/etc/dbus-1/system.d/mandos.conf
305
329
        install --mode=u=rwx,go=rx init.d-mandos \
306
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                $(DESTDIR)/etc/init.d/mandos
 
331
        if [ "$(SYSTEMD)" != "$(DESTDIR)" -a -d "$(SYSTEMD)" ]; then \
 
332
                install --mode=u=rw,go=r mandos.service $(SYSTEMD); \
 
333
        fi
307
334
        install --mode=u=rw,go=r default-mandos \
308
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                $(DESTDIR)/etc/default/mandos
309
336
        if [ -z $(DESTDIR) ]; then \
323
350
                > $(MANDIR)/man8/intro.8mandos.gz
324
351
 
325
352
install-client-nokey: all doc
326
 
        install --directory $(PREFIX)/lib/mandos $(CONFDIR)
 
353
        install --directory $(LIBDIR)/mandos $(CONFDIR)
327
354
        install --directory --mode=u=rwx $(KEYDIR) \
328
 
                $(PREFIX)/lib/mandos/plugins.d
329
 
        if [ "$(CONFDIR)" != "$(PREFIX)/lib/mandos" ]; then \
 
355
                $(LIBDIR)/mandos/plugins.d
 
356
        if [ "$(CONFDIR)" != "$(LIBDIR)/mandos" ]; then \
330
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                install --mode=u=rwx \
331
358
                        --directory "$(CONFDIR)/plugins.d"; \
332
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        fi
333
360
        install --mode=u=rwx,go=rx --directory \
334
361
                "$(CONFDIR)/network-hooks.d"
335
362
        install --mode=u=rwx,go=rx \
336
 
                --target-directory=$(PREFIX)/lib/mandos plugin-runner
 
363
                --target-directory=$(LIBDIR)/mandos plugin-runner
337
364
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
338
365
                mandos-keygen
339
366
        install --mode=u=rwx,go=rx \
340
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
367
                --target-directory=$(LIBDIR)/mandos/plugins.d \
341
368
                plugins.d/password-prompt
342
369
        install --mode=u=rwxs,go=rx \
343
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
370
                --target-directory=$(LIBDIR)/mandos/plugins.d \
344
371
                plugins.d/mandos-client
345
372
        install --mode=u=rwxs,go=rx \
346
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
373
                --target-directory=$(LIBDIR)/mandos/plugins.d \
347
374
                plugins.d/usplash
348
375
        install --mode=u=rwxs,go=rx \
349
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
376
                --target-directory=$(LIBDIR)/mandos/plugins.d \
350
377
                plugins.d/splashy
351
378
        install --mode=u=rwxs,go=rx \
352
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
379
                --target-directory=$(LIBDIR)/mandos/plugins.d \
353
380
                plugins.d/askpass-fifo
354
381
        install --mode=u=rwxs,go=rx \
355
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
382
                --target-directory=$(LIBDIR)/mandos/plugins.d \
356
383
                plugins.d/plymouth
357
384
        install initramfs-tools-hook \
358
385
                $(INITRAMFSTOOLS)/hooks/mandos
404
431
        ! grep --regexp='^ *[^ #].*keyscript=[^,=]*/mandos/' \
405
432
                $(DESTDIR)/etc/crypttab
406
433
        -rm --force $(PREFIX)/sbin/mandos-keygen \
407
 
                $(PREFIX)/lib/mandos/plugin-runner \
408
 
                $(PREFIX)/lib/mandos/plugins.d/password-prompt \
409
 
                $(PREFIX)/lib/mandos/plugins.d/mandos-client \
410
 
                $(PREFIX)/lib/mandos/plugins.d/usplash \
411
 
                $(PREFIX)/lib/mandos/plugins.d/splashy \
412
 
                $(PREFIX)/lib/mandos/plugins.d/askpass-fifo \
413
 
                $(PREFIX)/lib/mandos/plugins.d/plymouth \
 
434
                $(LIBDIR)/mandos/plugin-runner \
 
435
                $(LIBDIR)/mandos/plugins.d/password-prompt \
 
436
                $(LIBDIR)/mandos/plugins.d/mandos-client \
 
437
                $(LIBDIR)/mandos/plugins.d/usplash \
 
438
                $(LIBDIR)/mandos/plugins.d/splashy \
 
439
                $(LIBDIR)/mandos/plugins.d/askpass-fifo \
 
440
                $(LIBDIR)/mandos/plugins.d/plymouth \
414
441
                $(INITRAMFSTOOLS)/hooks/mandos \
415
442
                $(INITRAMFSTOOLS)/conf-hooks.d/mandos \
416
443
                $(INITRAMFSTOOLS)/scripts/init-premount/mandos \
422
449
                $(MANDIR)/man8/splashy.8mandos.gz \
423
450
                $(MANDIR)/man8/askpass-fifo.8mandos.gz \
424
451
                $(MANDIR)/man8/plymouth.8mandos.gz \
425
 
        -rmdir $(PREFIX)/lib/mandos/plugins.d $(CONFDIR)/plugins.d \
426
 
                 $(PREFIX)/lib/mandos $(CONFDIR) $(KEYDIR)
 
452
        -rmdir $(LIBDIR)/mandos/plugins.d $(CONFDIR)/plugins.d \
 
453
                 $(LIBDIR)/mandos $(CONFDIR) $(KEYDIR)
427
454
        update-initramfs -k all -u
428
455
 
429
456
purge: purge-server purge-client
433
460
                $(DESTDIR)/etc/dbus-1/system.d/mandos.conf
434
461
                $(DESTDIR)/etc/default/mandos \
435
462
                $(DESTDIR)/etc/init.d/mandos \
 
463
                $(SYSTEMD)/mandos.service \
 
464
                $(DESTDIR)/run/mandos.pid \
436
465
                $(DESTDIR)/var/run/mandos.pid
437
466
        -rmdir $(CONFDIR)
438
467