shell.php broken on most production hosts
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	Tgr
	Feb 9 2018, 11:39 PM

Description

shell.php is an interactive shell based on PsySH (intended to be the successor of eval.php, which is used for testing/debugging). To get around the problem of fatal errors causing the PHP process to exit, it uses a forked subprocess and stream_select to run commands. Apparently when the subprocess is created it immediately receives some kind of signal which confuses stream_select.

tgr@mw1279:~$ sudo -u www-data php /srv/mediawiki/multiversion/MWScript.php shell.php enwiki
[Fri Feb  9 23:36:25 2018] [hphp] [31577:7f7e46ae1200:0:000001] [] 
Notice: Writing to /home/tgr/.config/psysh is not allowed. in /srv/mediawiki/php-1.31.0-wmf.20/vendor/psy/psysh/src/Psy/ConfigPaths.php on line 213
Psy Shell v0.8.11 (PHP 5.6.99-hhvm — cli) by Justin Hileman
>>> 1
=> 1
[Fri Feb  9 23:36:41 2018] [hphp] [31577:7f7e46ae1200:0:000002] [] 
Warning: unable to select [4]: Interrupted system call in /srv/mediawiki/php-1.31.0-wmf.20/vendor/psy/psysh/src/Psy/ExecutionLoop/ForkingLoop.php on line 57
RuntimeException with message 'Error waiting for execution loop.'
>>> tgr@mw1279:~$

shell.php is a lot more powerful than eval.php, it would be nice to get it working everywhere.

(Also PsySH tries to store the history in ~/.config/psysh but can't since it's running as www-data, but that's a much more minor annoyance.)

Workaround: PHP="hhvm -d hhvm.server.light_process_count=0" mwscript shell.php enwiki

Details

	Subject	Repo	Branch	Lines +/-
	PsySH: 0.8.11 -> 0.9.6	mediawiki/vendor	master	+11 K -5 K

Customize query in gerrit

Related Objects

Mentioned In: T228041: Using shell.php in production fails to load personal configuration and sends warnings to Logstash
T186927: mw-parser-output divs leaking into mobileview output again
T117661: Integrate a modern php REPL shell with MediaWiki
Mentioned Here: T195392: Switch cronjobs on maintenance hosts to PHP7
P7120 strace on terbium
P7121 strace on vagrant

Event Timeline

Tgr created this task.Feb 9 2018, 11:39 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptFeb 9 2018, 11:39 PM

Tgr mentioned this in T117661: Integrate a modern php REPL shell with MediaWiki.Feb 9 2018, 11:39 PM

Tgr mentioned this in T186927: mw-parser-output divs leaking into mobileview output again.Feb 10 2018, 2:37 AM

• Mholloway subscribed.Feb 10 2018, 3:32 AM

Nikerabbit subscribed.Feb 11 2018, 10:49 AM

Filed upstream as bobthecow/psysh#494, not really sure this is an upstream problem though.

strace:

P7120 strace on terbium

1	tgr@terbium:~$ strace mwscript shell.php enwiki
2	execve("/usr/local/bin/mwscript", ["mwscript", "shell.php", "enwiki"], [/* 19 vars */]) = 0
3	brk(0) = 0x805000
4	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
5	mmap(NULL, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f3eef61d000
6	access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
7	open("/etc/ld.so.cache", O_RDONLY\|O_CLOEXEC) = 3
8	fstat(3, {st_mode=S_IFREG\|0644, st_size=43526, ...}) = 0
9	mmap(NULL, 43526, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f3eef612000
10	close(3) = 0
11	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
12	open("/lib/x86_64-linux-gnu/libncurses.so.5", O_RDONLY\|O_CLOEXEC) = 3
13	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320l\0\0\0\0\0\0"..., 832) = 832
14	fstat(3, {st_mode=S_IFREG\|0644, st_size=151120, ...}) = 0
15	mmap(NULL, 2246824, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f3eef1da000
16	mprotect(0x7f3eef1fe000, 2093056, PROT_NONE) = 0
17	mmap(0x7f3eef3fd000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x23000) = 0x7f3eef3fd000
18	close(3) = 0
19	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
20	open("/lib/x86_64-linux-gnu/libtinfo.so.5", O_RDONLY\|O_CLOEXEC) = 3
21	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\316\0\0\0\0\0\0"..., 832) = 832
22	fstat(3, {st_mode=S_IFREG\|0644, st_size=171800, ...}) = 0
23	mmap(NULL, 2269152, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f3eeefb0000
24	mprotect(0x7f3eeefd6000, 2093056, PROT_NONE) = 0
25	mmap(0x7f3eef1d5000, 20480, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x25000) = 0x7f3eef1d5000
26	close(3) = 0
27	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
28	open("/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY\|O_CLOEXEC) = 3
29	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\16\0\0\0\0\0\0"..., 832) = 832
30	fstat(3, {st_mode=S_IFREG\|0644, st_size=14664, ...}) = 0
31	mmap(NULL, 4096, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f3eef611000
32	mmap(NULL, 2109712, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f3eeedac000
33	mprotect(0x7f3eeedaf000, 2093056, PROT_NONE) = 0
34	mmap(0x7f3eeefae000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x2000) = 0x7f3eeefae000
35	close(3) = 0
36	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
37	open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY\|O_CLOEXEC) = 3
38	read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\34\2\0\0\0\0\0"..., 832) = 832
39	fstat(3, {st_mode=S_IFREG\|0755, st_size=1738176, ...}) = 0
40	mmap(NULL, 3844640, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f3eeea01000
41	mprotect(0x7f3eeeba2000, 2097152, PROT_NONE) = 0
42	mmap(0x7f3eeeda2000, 24576, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x1a1000) = 0x7f3eeeda2000
43	mmap(0x7f3eeeda8000, 14880, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f3eeeda8000
44	close(3) = 0
45	mmap(NULL, 4096, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f3eef610000
46	mmap(NULL, 4096, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f3eef60f000
47	mmap(NULL, 4096, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f3eef60e000
48	arch_prctl(ARCH_SET_FS, 0x7f3eef60f700) = 0
49	mprotect(0x7f3eeeda2000, 16384, PROT_READ) = 0
50	mprotect(0x7f3eeefae000, 4096, PROT_READ) = 0
51	mprotect(0x7f3eef1d5000, 16384, PROT_READ) = 0
52	mprotect(0x7f3eef3fd000, 4096, PROT_READ) = 0
53	mprotect(0x6f1000, 4096, PROT_READ) = 0
54	mprotect(0x7f3eef61f000, 4096, PROT_READ) = 0
55	munmap(0x7f3eef612000, 43526) = 0
56	open("/dev/tty", O_RDWR\|O_NONBLOCK) = 3
57	close(3) = 0
58	brk(0) = 0x805000
59	brk(0x806000) = 0x806000
60	open("/usr/lib/locale/locale-archive", O_RDONLY\|O_CLOEXEC) = 3
61	fstat(3, {st_mode=S_IFREG\|0644, st_size=1607712, ...}) = 0
62	mmap(NULL, 1607712, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f3eef485000
63	close(3) = 0
64	brk(0x807000) = 0x807000
65	brk(0x808000) = 0x808000
66	getuid() = 2355
67	getgid() = 500
68	geteuid() = 2355
69	getegid() = 500
70	rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
71	brk(0x809000) = 0x809000
72	open("/proc/meminfo", O_RDONLY\|O_CLOEXEC) = 3
73	fstat(3, {st_mode=S_IFREG\|0444, st_size=0, ...}) = 0
74	mmap(NULL, 4096, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f3eef61c000
75	read(3, "MemTotal: 32868688 kB\nMemF"..., 1024) = 1024
76	close(3) = 0
77	munmap(0x7f3eef61c000, 4096) = 0
78	brk(0x80a000) = 0x80a000
79	rt_sigaction(SIGCHLD, {SIG_DFL, [], SA_RESTORER\|SA_RESTART, 0x7f3eeea360e0}, {SIG_DFL, [], 0}, 8) = 0
80	rt_sigaction(SIGCHLD, {SIG_DFL, [], SA_RESTORER\|SA_RESTART, 0x7f3eeea360e0}, {SIG_DFL, [], SA_RESTORER\|SA_RESTART, 0x7f3eeea360e0}, 8) = 0
81	rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, {SIG_DFL, [], 0}, 8) = 0
82	rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0
83	rt_sigaction(SIGQUIT, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, {SIG_DFL, [], 0}, 8) = 0
84	rt_sigaction(SIGQUIT, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0
85	rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
86	rt_sigaction(SIGQUIT, {SIG_IGN, [], SA_RESTORER, 0x7f3eeea360e0}, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0
87	uname({sys="Linux", node="terbium", ...}) = 0
88	brk(0x80b000) = 0x80b000
89	brk(0x80c000) = 0x80c000
90	stat("/home/tgr", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
91	stat(".", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
92	getpid() = 21925
93	open("/usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache", O_RDONLY) = 3
94	fstat(3, {st_mode=S_IFREG\|0644, st_size=26258, ...}) = 0
95	mmap(NULL, 26258, PROT_READ, MAP_SHARED, 3, 0) = 0x7f3eef616000
96	close(3) = 0
97	getppid() = 21922
98	brk(0x80d000) = 0x80d000
99	brk(0x80e000) = 0x80e000
100	getpgrp() = 21922
101	rt_sigaction(SIGCHLD, {0x446580, [], SA_RESTORER\|SA_RESTART, 0x7f3eeea360e0}, {SIG_DFL, [], SA_RESTORER\|SA_RESTART, 0x7f3eeea360e0}, 8) = 0
102	getrlimit(RLIMIT_NPROC, {rlim_cur=128304, rlim_max=128304}) = 0
103	brk(0x80f000) = 0x80f000
104	brk(0x810000) = 0x810000
105	rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
106	open("/usr/local/bin/mwscript", O_RDONLY) = 3
107	ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0x7ffc145dd760) = -1 ENOTTY (Inappropriate ioctl for device)
108	lseek(3, 0, SEEK_CUR) = 0
109	read(3, "#!/bin/bash\n# Shell wrapper for "..., 80) = 80
110	lseek(3, 0, SEEK_SET) = 0
111	getrlimit(RLIMIT_NOFILE, {rlim_cur=641024, rlim_max=641024}) = 0
112	fcntl(255, F_GETFD) = -1 EBADF (Bad file descriptor)
113	dup2(3, 255) = 255
114	close(3) = 0
115	fcntl(255, F_SETFD, FD_CLOEXEC) = 0
116	fcntl(255, F_GETFL) = 0x8000 (flags O_RDONLY\|O_LARGEFILE)
117	fstat(255, {st_mode=S_IFREG\|0555, st_size=1020, ...}) = 0
118	lseek(255, 0, SEEK_CUR) = 0
119	brk(0x811000) = 0x811000
120	read(255, "#!/bin/bash\n# Shell wrapper for "..., 1020) = 1020
121	open("/etc/profile.d/mediawiki.sh", O_RDONLY) = 3
122	fstat(3, {st_mode=S_IFREG\|0444, st_size=387, ...}) = 0
123	brk(0x812000) = 0x812000
124	read(3, "# MediaWiki-related shell enviro"..., 387) = 387
125	close(3) = 0
126	rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
127	brk(0x813000) = 0x813000
128	rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
129	pipe([3, 4]) = 0
130	brk(0x814000) = 0x814000
131	rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0
132	clone(child_stack=0, flags=CLONE_CHILD_CLEARTID\|CLONE_CHILD_SETTID\|SIGCHLD, child_tidptr=0x7f3eef60f9d0) = 21926
133	rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
134	close(4) = 0
135	close(4) = -1 EBADF (Bad file descriptor)
136	rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0
137	clone(child_stack=0, flags=CLONE_CHILD_CLEARTID\|CLONE_CHILD_SETTID\|SIGCHLD, child_tidptr=0x7f3eef60f9d0) = 21927
138	rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
139	close(3) = 0
140	rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0
141	rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
142	rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0
143	rt_sigaction(SIGINT, {0x443740, [], SA_RESTORER, 0x7f3eeea360e0}, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0
144	wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 21926
145	wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 21927
146	rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, {0x443740, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0
147	rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
148	close(3) = -1 EBADF (Bad file descriptor)
149	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
150	--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21926, si_uid=2355, si_status=0, si_utime=0, si_stime=0} ---
151	wait4(-1, 0x7ffc145dc910, WNOHANG, NULL) = -1 ECHILD (No child processes)
152	rt_sigreturn() = 0
153	umask(02) = 02
154	stat("/srv/mediawiki-staging", {st_mode=S_IFDIR\|0775, st_size=4096, ...}) = 0
155	pipe([3, 4]) = 0
156	rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
157	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
158	rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
159	clone(child_stack=0, flags=CLONE_CHILD_CLEARTID\|CLONE_CHILD_SETTID\|SIGCHLD, child_tidptr=0x7f3eef60f9d0) = 21928
160	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
161	rt_sigaction(SIGCHLD, {0x446580, [], SA_RESTORER\|SA_RESTART, 0x7f3eeea360e0}, {0x446580, [], SA_RESTORER\|SA_RESTART, 0x7f3eeea360e0}, 8) = 0
162	close(4) = 0
163	read(3, "tgr\n", 128) = 4
164	read(3, "", 128) = 0
165	close(3) = 0
166	rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
167	rt_sigaction(SIGINT, {0x443740, [], SA_RESTORER, 0x7f3eeea360e0}, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0
168	wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 21928
169	rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, {0x443740, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0
170	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
171	--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21928, si_uid=2355, si_status=0, si_utime=0, si_stime=0} ---
172	wait4(-1, 0x7ffc145dca10, WNOHANG, NULL) = -1 ECHILD (No child processes)
173	rt_sigreturn() = 0
174	stat(".", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
175	stat("/usr/local/bin/sudo", 0x7ffc145dd330) = -1 ENOENT (No such file or directory)
176	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=157760, ...}) = 0
177	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=157760, ...}) = 0
178	geteuid() = 2355
179	getegid() = 500
180	getuid() = 2355
181	getgid() = 500
182	access("/usr/bin/sudo", X_OK) = 0
183	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=157760, ...}) = 0
184	geteuid() = 2355
185	getegid() = 500
186	getuid() = 2355
187	getgid() = 500
188	access("/usr/bin/sudo", R_OK) = 0
189	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=157760, ...}) = 0
190	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=157760, ...}) = 0
191	geteuid() = 2355
192	getegid() = 500
193	getuid() = 2355
194	getgid() = 500
195	access("/usr/bin/sudo", X_OK) = 0
196	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=157760, ...}) = 0
197	geteuid() = 2355
198	getegid() = 500
199	getuid() = 2355
200	getgid() = 500
201	access("/usr/bin/sudo", R_OK) = 0
202	rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
203	rt_sigprocmask(SIG_BLOCK, [CHLD], [INT CHLD], 8) = 0
204	rt_sigprocmask(SIG_SETMASK, [INT CHLD], NULL, 8) = 0
205	clone(child_stack=0, flags=CLONE_CHILD_CLEARTID\|CLONE_CHILD_SETTID\|SIGCHLD, child_tidptr=0x7f3eef60f9d0) = 21929
206	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
207	rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
208	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
209	rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
210	rt_sigaction(SIGINT, {0x443740, [], SA_RESTORER, 0x7f3eeea360e0}, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0
211	wait4(-1, [Sat May 12 13:30:45 2018] [hphp] [21930:7f7055fe2200:0:000001] []
212	Notice: Writing to /home/tgr/.config/psysh is not allowed. in /srv/mediawiki/php-1.32.0-wmf.3/vendor/psy/psysh/src/Psy/ConfigPaths.php on line 213
213	Psy Shell v0.8.11 (PHP 5.6.99-hhvm — cli) by Justin Hileman
214	>>> 1
215	=> 1
216	[Sat May 12 13:30:48 2018] [hphp] [21930:7f7055fe2200:0:000002] []
217	Warning: unable to select [4]: Interrupted system call in /srv/mediawiki/php-1.32.0-wmf.3/vendor/psy/psysh/src/Psy/ExecutionLoop/ForkingLoop.php on line 57
218	RuntimeException with message 'Error waiting for execution loop.'
219	>>> [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 21929
220	rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, {0x443740, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0
221	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
222	--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=21929, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
223	wait4(-1, 0x7ffc145dce50, WNOHANG, NULL) = -1 ECHILD (No child processes)
224	rt_sigreturn() = 0
225	read(255, "", 1020) = 0
226	rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
227	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
228	exit_group(0) = ?
229	+++ exited with 0 +++

strace on a vagrant box (with no error) for comparison:

P7121 strace on vagrant

1	```
2	vagrant@mcr:/vagrant/mediawiki$ sudo strace mwscript shell.php
3	execve("/usr/local/bin/mwscript", ["mwscript", "shell.php"], [/* 17 vars */]) = 0
4	brk(NULL) = 0x55902ac9a000
5	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
6	mmap(NULL, 12288, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7faba1ed4000
7	access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
8	open("/etc/ld.so.cache", O_RDONLY\|O_CLOEXEC) = 3
9	fstat(3, {st_mode=S_IFREG\|0644, st_size=30013, ...}) = 0
10	mmap(NULL, 30013, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faba1ecc000
11	close(3) = 0
12	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
13	open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY\|O_CLOEXEC) = 3
14	read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\3\2\0\0\0\0\0"..., 832) = 832
15	fstat(3, {st_mode=S_IFREG\|0755, st_size=1689360, ...}) = 0
16	mmap(NULL, 3795360, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7faba1915000
17	mprotect(0x7faba1aaa000, 2097152, PROT_NONE) = 0
18	mmap(0x7faba1caa000, 24576, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x195000) = 0x7faba1caa000
19	mmap(0x7faba1cb0000, 14752, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7faba1cb0000
20	close(3) = 0
21	mmap(NULL, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7faba1eca000
22	arch_prctl(ARCH_SET_FS, 0x7faba1eca700) = 0
23	mprotect(0x7faba1caa000, 16384, PROT_READ) = 0
24	mprotect(0x559028d19000, 4096, PROT_READ) = 0
25	mprotect(0x7faba1ed7000, 4096, PROT_READ) = 0
26	munmap(0x7faba1ecc000, 30013) = 0
27	brk(NULL) = 0x55902ac9a000
28	brk(0x55902acbb000) = 0x55902acbb000
29	open("/usr/lib/locale/locale-archive", O_RDONLY\|O_CLOEXEC) = 3
30	fstat(3, {st_mode=S_IFREG\|0644, st_size=1679488, ...}) = 0
31	mmap(NULL, 1679488, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faba1d2f000
32	close(3) = 0
33	execve("/usr/local/sbin/bash", ["bash", "/usr/local/bin/mwscript", "shell.php"], [/* 17 vars */]) = -1 ENOENT (No such file or directory)
34	execve("/usr/local/bin/bash", ["bash", "/usr/local/bin/mwscript", "shell.php"], [/* 17 vars */]) = -1 ENOENT (No such file or directory)
35	execve("/usr/sbin/bash", ["bash", "/usr/local/bin/mwscript", "shell.php"], [/* 17 vars */]) = -1 ENOENT (No such file or directory)
36	execve("/usr/bin/bash", ["bash", "/usr/local/bin/mwscript", "shell.php"], [/* 17 vars */]) = -1 ENOENT (No such file or directory)
37	execve("/sbin/bash", ["bash", "/usr/local/bin/mwscript", "shell.php"], [/* 17 vars */]) = -1 ENOENT (No such file or directory)
38	execve("/bin/bash", ["bash", "/usr/local/bin/mwscript", "shell.php"], [/* 17 vars */]) = 0
39	brk(NULL) = 0x1ff2000
40	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
41	mmap(NULL, 12288, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f2cad144000
42	access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
43	open("/etc/ld.so.cache", O_RDONLY\|O_CLOEXEC) = 3
44	fstat(3, {st_mode=S_IFREG\|0644, st_size=30013, ...}) = 0
45	mmap(NULL, 30013, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2cad13c000
46	close(3) = 0
47	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
48	open("/lib/x86_64-linux-gnu/libtinfo.so.5", O_RDONLY\|O_CLOEXEC) = 3
49	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\315\0\0\0\0\0\0"..., 832) = 832
50	fstat(3, {st_mode=S_IFREG\|0644, st_size=170776, ...}) = 0
51	mmap(NULL, 2267936, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f2caccfa000
52	mprotect(0x7f2cacd20000, 2093056, PROT_NONE) = 0
53	mmap(0x7f2cacf1f000, 20480, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x25000) = 0x7f2cacf1f000
54	close(3) = 0
55	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
56	open("/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY\|O_CLOEXEC) = 3
57	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\r\0\0\0\0\0\0"..., 832) = 832
58	fstat(3, {st_mode=S_IFREG\|0644, st_size=14640, ...}) = 0
59	mmap(NULL, 2109680, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f2cacaf6000
60	mprotect(0x7f2cacaf9000, 2093056, PROT_NONE) = 0
61	mmap(0x7f2caccf8000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x2000) = 0x7f2caccf8000
62	close(3) = 0
63	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
64	open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY\|O_CLOEXEC) = 3
65	read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\3\2\0\0\0\0\0"..., 832) = 832
66	fstat(3, {st_mode=S_IFREG\|0755, st_size=1689360, ...}) = 0
67	mmap(NULL, 3795360, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f2cac757000
68	mprotect(0x7f2cac8ec000, 2097152, PROT_NONE) = 0
69	mmap(0x7f2cacaec000, 24576, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x195000) = 0x7f2cacaec000
70	mmap(0x7f2cacaf2000, 14752, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f2cacaf2000
71	close(3) = 0
72	mmap(NULL, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f2cad13a000
73	arch_prctl(ARCH_SET_FS, 0x7f2cad13ab40) = 0
74	mprotect(0x7f2cacaec000, 16384, PROT_READ) = 0
75	mprotect(0x7f2caccf8000, 4096, PROT_READ) = 0
76	mprotect(0x7f2cacf1f000, 16384, PROT_READ) = 0
77	mprotect(0x700000, 12288, PROT_READ) = 0
78	mprotect(0x7f2cad147000, 4096, PROT_READ) = 0
79	munmap(0x7f2cad13c000, 30013) = 0
80	open("/dev/tty", O_RDWR\|O_NONBLOCK) = 3
81	close(3) = 0
82	brk(NULL) = 0x1ff2000
83	brk(0x1ff3000) = 0x1ff3000
84	open("/usr/lib/locale/locale-archive", O_RDONLY\|O_CLOEXEC) = 3
85	fstat(3, {st_mode=S_IFREG\|0644, st_size=1679488, ...}) = 0
86	mmap(NULL, 1679488, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2cacf9f000
87	close(3) = 0
88	brk(0x1ff4000) = 0x1ff4000
89	brk(0x1ff5000) = 0x1ff5000
90	getuid() = 0
91	getgid() = 0
92	geteuid() = 0
93	getegid() = 0
94	rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
95	ioctl(-1, TIOCGPGRP, 0x7ffe86455d9c) = -1 EBADF (Bad file descriptor)
96	brk(0x1ff6000) = 0x1ff6000
97	sysinfo({uptime=189637, loads=[21280, 14432, 13248], totalram=2101465088, freeram=210497536, sharedram=19144704, bufferram=100745216, totalswap=1071640576, freeswap=1071640576, procs=264, totalhigh=0, freehigh=0, mem_unit=1}) = 0
98	brk(0x1ff7000) = 0x1ff7000
99	rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
100	rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f2cac78a030}, 8) = 0
101	rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
102	rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
103	rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
104	rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
105	rt_sigaction(SIGTSTP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
106	rt_sigaction(SIGTSTP, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
107	rt_sigaction(SIGTTIN, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
108	rt_sigaction(SIGTTIN, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
109	rt_sigaction(SIGTTOU, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
110	rt_sigaction(SIGTTOU, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
111	rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
112	rt_sigaction(SIGQUIT, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
113	uname({sysname="Linux", nodename="mcr", ...}) = 0
114	brk(0x1ff8000) = 0x1ff8000
115	brk(0x1ffc000) = 0x1ffc000
116	brk(0x1ffe000) = 0x1ffe000
117	brk(0x2000000) = 0x2000000
118	brk(0x2002000) = 0x2002000
119	getcwd("/vagrant/mediawiki", 4096) = 19
120	getpid() = 26291
121	open("/usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache", O_RDONLY) = 3
122	fstat(3, {st_mode=S_IFREG\|0644, st_size=26258, ...}) = 0
123	mmap(NULL, 26258, PROT_READ, MAP_SHARED, 3, 0) = 0x7f2cad13d000
124	close(3) = 0
125	getppid() = 26289
126	stat(".", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
127	stat("/usr/local/sbin/bash", 0x7ffe86455a10) = -1 ENOENT (No such file or directory)
128	stat("/usr/local/bin/bash", 0x7ffe86455a10) = -1 ENOENT (No such file or directory)
129	stat("/usr/sbin/bash", 0x7ffe86455a10) = -1 ENOENT (No such file or directory)
130	stat("/usr/bin/bash", 0x7ffe86455a10) = -1 ENOENT (No such file or directory)
131	stat("/sbin/bash", 0x7ffe86455a10) = -1 ENOENT (No such file or directory)
132	stat("/bin/bash", {st_mode=S_IFREG\|0755, st_size=1099016, ...}) = 0
133	stat("/bin/bash", {st_mode=S_IFREG\|0755, st_size=1099016, ...}) = 0
134	geteuid() = 0
135	getegid() = 0
136	getuid() = 0
137	getgid() = 0
138	access("/bin/bash", X_OK) = 0
139	stat("/bin/bash", {st_mode=S_IFREG\|0755, st_size=1099016, ...}) = 0
140	geteuid() = 0
141	getegid() = 0
142	getuid() = 0
143	getgid() = 0
144	access("/bin/bash", R_OK) = 0
145	stat("/bin/bash", {st_mode=S_IFREG\|0755, st_size=1099016, ...}) = 0
146	stat("/bin/bash", {st_mode=S_IFREG\|0755, st_size=1099016, ...}) = 0
147	geteuid() = 0
148	getegid() = 0
149	getuid() = 0
150	getgid() = 0
151	access("/bin/bash", X_OK) = 0
152	stat("/bin/bash", {st_mode=S_IFREG\|0755, st_size=1099016, ...}) = 0
153	geteuid() = 0
154	getegid() = 0
155	getuid() = 0
156	getgid() = 0
157	access("/bin/bash", R_OK) = 0
158	getpid() = 26291
159	brk(0x2003000) = 0x2003000
160	getpgrp() = 26288
161	ioctl(2, TIOCGPGRP, [26288]) = 0
162	rt_sigaction(SIGCHLD, {sa_handler=0x44cf90, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f2cac78a030}, 8) = 0
163	getrlimit(RLIMIT_NPROC, {rlim_cur=7929, rlim_max=7929}) = 0
164	rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
165	brk(0x2004000) = 0x2004000
166	brk(0x2005000) = 0x2005000
167	open("/usr/local/bin/mwscript", O_RDONLY) = 3
168	stat("/usr/local/bin/mwscript", {st_mode=S_IFREG\|0755, st_size=269, ...}) = 0
169	ioctl(3, TCGETS, 0x7ffe86455d30) = -1 ENOTTY (Inappropriate ioctl for device)
170	lseek(3, 0, SEEK_CUR) = 0
171	read(3, "#!/usr/bin/env bash\n# Shell wrap"..., 80) = 80
172	lseek(3, 0, SEEK_SET) = 0
173	getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024*1024}) = 0
174	fcntl(255, F_GETFD) = -1 EBADF (Bad file descriptor)
175	dup2(3, 255) = 255
176	close(3) = 0
177	fcntl(255, F_SETFD, FD_CLOEXEC) = 0
178	fcntl(255, F_GETFL) = 0x8000 (flags O_RDONLY\|O_LARGEFILE)
179	fstat(255, {st_mode=S_IFREG\|0755, st_size=269, ...}) = 0
180	lseek(255, 0, SEEK_CUR) = 0
181	brk(0x2006000) = 0x2006000
182	read(255, "#!/usr/bin/env bash\n# Shell wrap"..., 269) = 269
183	brk(0x2007000) = 0x2007000
184	rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
185	brk(0x2008000) = 0x2008000
186	brk(0x2009000) = 0x2009000
187	pipe([3, 4]) = 0
188	rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
189	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
190	rt_sigprocmask(SIG_BLOCK, [INT CHLD], [], 8) = 0
191	lseek(255, -68, SEEK_CUR) = 201
192	clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID\|CLONE_CHILD_SETTID\|SIGCHLD, child_tidptr=0x7f2cad13ae10) = 26292
193	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
194	rt_sigaction(SIGCHLD, {sa_handler=0x44cf90, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f2cac78a030}, {sa_handler=0x44cf90, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f2cac78a030}, 8) = 0
195	close(4) = 0
196	--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=26292, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
197	wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG, NULL) = 26292
198	wait4(-1, 0x7ffe86455110, WNOHANG, NULL) = -1 ECHILD (No child processes)
199	rt_sigreturn({mask=[]}) = 0
200	read(3, "root\n", 128) = 5
201	read(3, "", 128) = 0
202	close(3) = 0
203	rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
204	rt_sigaction(SIGINT, {sa_handler=0x449930, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
205	rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=0x449930, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
206	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
207	stat(".", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
208	stat("/usr/local/sbin/sudo", 0x7ffe864557f0) = -1 ENOENT (No such file or directory)
209	stat("/usr/local/bin/sudo", 0x7ffe864557f0) = -1 ENOENT (No such file or directory)
210	stat("/usr/sbin/sudo", 0x7ffe864557f0) = -1 ENOENT (No such file or directory)
211	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=140944, ...}) = 0
212	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=140944, ...}) = 0
213	geteuid() = 0
214	getegid() = 0
215	getuid() = 0
216	getgid() = 0
217	access("/usr/bin/sudo", X_OK) = 0
218	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=140944, ...}) = 0
219	geteuid() = 0
220	getegid() = 0
221	getuid() = 0
222	getgid() = 0
223	access("/usr/bin/sudo", R_OK) = 0
224	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=140944, ...}) = 0
225	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=140944, ...}) = 0
226	geteuid() = 0
227	getegid() = 0
228	getuid() = 0
229	getgid() = 0
230	access("/usr/bin/sudo", X_OK) = 0
231	stat("/usr/bin/sudo", {st_mode=S_IFREG\|S_ISUID\|0755, st_size=140944, ...}) = 0
232	geteuid() = 0
233	getegid() = 0
234	getuid() = 0
235	getgid() = 0
236	access("/usr/bin/sudo", R_OK) = 0
237	rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
238	rt_sigaction(SIGQUIT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f2cac78a030}, 8) = 0
239	rt_sigaction(SIGCHLD, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f2cac78a030}, {sa_handler=0x44cf90, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f2cac78a030}, 8) = 0
240	execve("/usr/bin/sudo", ["sudo", "--preserve-env", "-u", "www-data", "-n", "--", "/usr/local/bin/mwscript", "shell.php"], [/* 19 vars */]) = 0
241	brk(NULL) = 0x55681a721000
242	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
243	mmap(NULL, 12288, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f1cbb8a1000
244	access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
245	open("/usr/lib/sudo/tls/x86_64/libaudit.so.1", O_RDONLY\|O_CLOEXEC) = -1 ENOENT (No such file or directory)
246	stat("/usr/lib/sudo/tls/x86_64", 0x7ffd14b1b990) = -1 ENOENT (No such file or directory)
247	open("/usr/lib/sudo/tls/libaudit.so.1", O_RDONLY\|O_CLOEXEC) = -1 ENOENT (No such file or directory)
248	stat("/usr/lib/sudo/tls", 0x7ffd14b1b990) = -1 ENOENT (No such file or directory)
249	open("/usr/lib/sudo/x86_64/libaudit.so.1", O_RDONLY\|O_CLOEXEC) = -1 ENOENT (No such file or directory)
250	stat("/usr/lib/sudo/x86_64", 0x7ffd14b1b990) = -1 ENOENT (No such file or directory)
251	open("/usr/lib/sudo/libaudit.so.1", O_RDONLY\|O_CLOEXEC) = -1 ENOENT (No such file or directory)
252	stat("/usr/lib/sudo", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
253	open("/etc/ld.so.cache", O_RDONLY\|O_CLOEXEC) = 3
254	fstat(3, {st_mode=S_IFREG\|0644, st_size=30013, ...}) = 0
255	mmap(NULL, 30013, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f1cbb899000
256	close(3) = 0
257	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
258	open("/lib/x86_64-linux-gnu/libaudit.so.1", O_RDONLY\|O_CLOEXEC) = 3
259	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0-\0\0\0\0\0\0"..., 832) = 832
260	fstat(3, {st_mode=S_IFREG\|0644, st_size=120752, ...}) = 0
261	mmap(NULL, 2257000, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f1cbb459000
262	mprotect(0x7f1cbb476000, 2093056, PROT_NONE) = 0
263	mmap(0x7f1cbb675000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x1c000) = 0x7f1cbb675000
264	mmap(0x7f1cbb677000, 36968, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cbb677000
265	close(3) = 0
266	open("/usr/lib/sudo/libselinux.so.1", O_RDONLY\|O_CLOEXEC) = -1 ENOENT (No such file or directory)
267	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
268	open("/lib/x86_64-linux-gnu/libselinux.so.1", O_RDONLY\|O_CLOEXEC) = 3
269	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000k\0\0\0\0\0\0"..., 832) = 832
270	fstat(3, {st_mode=S_IFREG\|0644, st_size=155400, ...}) = 0
271	mmap(NULL, 2259664, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f1cbb231000
272	mprotect(0x7f1cbb256000, 2093056, PROT_NONE) = 0
273	mmap(0x7f1cbb455000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x24000) = 0x7f1cbb455000
274	mmap(0x7f1cbb457000, 6864, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cbb457000
275	close(3) = 0
276	open("/usr/lib/sudo/libutil.so.1", O_RDONLY\|O_CLOEXEC) = -1 ENOENT (No such file or directory)
277	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
278	open("/lib/x86_64-linux-gnu/libutil.so.1", O_RDONLY\|O_CLOEXEC) = 3
279	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\16\0\0\0\0\0\0"..., 832) = 832
280	fstat(3, {st_mode=S_IFREG\|0644, st_size=10688, ...}) = 0
281	mmap(NULL, 2105608, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f1cbb02e000
282	mprotect(0x7f1cbb030000, 2093056, PROT_NONE) = 0
283	mmap(0x7f1cbb22f000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x1000) = 0x7f1cbb22f000
284	close(3) = 0
285	open("/usr/lib/sudo/libsudo_util.so.0", O_RDONLY\|O_CLOEXEC) = 3
286	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`>\0\0\0\0\0\0"..., 832) = 832
287	fstat(3, {st_mode=S_IFREG\|0644, st_size=80264, ...}) = 0
288	mmap(NULL, 2175848, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f1cbae1a000
289	mprotect(0x7f1cbae2d000, 2093056, PROT_NONE) = 0
290	mmap(0x7f1cbb02c000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x12000) = 0x7f1cbb02c000
291	close(3) = 0
292	open("/usr/lib/sudo/libdl.so.2", O_RDONLY\|O_CLOEXEC) = -1 ENOENT (No such file or directory)
293	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
294	open("/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY\|O_CLOEXEC) = 3
295	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\r\0\0\0\0\0\0"..., 832) = 832
296	fstat(3, {st_mode=S_IFREG\|0644, st_size=14640, ...}) = 0
297	mmap(NULL, 2109680, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f1cbac16000
298	mprotect(0x7f1cbac19000, 2093056, PROT_NONE) = 0
299	mmap(0x7f1cbae18000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x2000) = 0x7f1cbae18000
300	close(3) = 0
301	open("/usr/lib/sudo/libc.so.6", O_RDONLY\|O_CLOEXEC) = -1 ENOENT (No such file or directory)
302	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
303	open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY\|O_CLOEXEC) = 3
304	read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\3\2\0\0\0\0\0"..., 832) = 832
305	fstat(3, {st_mode=S_IFREG\|0755, st_size=1689360, ...}) = 0
306	mmap(NULL, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f1cbb897000
307	mmap(NULL, 3795360, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f1cba877000
308	mprotect(0x7f1cbaa0c000, 2097152, PROT_NONE) = 0
309	mmap(0x7f1cbac0c000, 24576, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x195000) = 0x7f1cbac0c000
310	mmap(0x7f1cbac12000, 14752, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cbac12000
311	close(3) = 0
312	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
313	open("/lib/x86_64-linux-gnu/libcap-ng.so.0", O_RDONLY\|O_CLOEXEC) = 3
314	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\25\0\0\0\0\0\0"..., 832) = 832
315	fstat(3, {st_mode=S_IFREG\|0644, st_size=22944, ...}) = 0
316	mmap(NULL, 2118008, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f1cba671000
317	mprotect(0x7f1cba675000, 2097152, PROT_NONE) = 0
318	mmap(0x7f1cba875000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x4000) = 0x7f1cba875000
319	close(3) = 0
320	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
321	open("/lib/x86_64-linux-gnu/libpcre.so.3", O_RDONLY\|O_CLOEXEC) = 3
322	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\25\0\0\0\0\0\0"..., 832) = 832
323	fstat(3, {st_mode=S_IFREG\|0644, st_size=468920, ...}) = 0
324	mmap(NULL, 2564360, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f1cba3fe000
325	mprotect(0x7f1cba470000, 2093056, PROT_NONE) = 0
326	mmap(0x7f1cba66f000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x71000) = 0x7f1cba66f000
327	close(3) = 0
328	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
329	open("/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY\|O_CLOEXEC) = 3
330	read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0Pa\0\0\0\0\0\0"..., 832) = 832
331	fstat(3, {st_mode=S_IFREG\|0755, st_size=135440, ...}) = 0
332	mmap(NULL, 2212936, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 3, 0) = 0x7f1cba1e1000
333	mprotect(0x7f1cba1f9000, 2093056, PROT_NONE) = 0
334	mmap(0x7f1cba3f8000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 3, 0x17000) = 0x7f1cba3f8000
335	mmap(0x7f1cba3fa000, 13384, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cba3fa000
336	close(3) = 0
337	mmap(NULL, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f1cbb895000
338	arch_prctl(ARCH_SET_FS, 0x7f1cbb895ec0) = 0
339	mprotect(0x7f1cbac0c000, 16384, PROT_READ) = 0
340	mprotect(0x7f1cba3f8000, 4096, PROT_READ) = 0
341	mprotect(0x7f1cba66f000, 4096, PROT_READ) = 0
342	mprotect(0x7f1cba875000, 4096, PROT_READ) = 0
343	mprotect(0x7f1cbae18000, 4096, PROT_READ) = 0
344	mprotect(0x7f1cbb02c000, 4096, PROT_READ) = 0
345	mprotect(0x7f1cbb22f000, 4096, PROT_READ) = 0
346	mprotect(0x7f1cbb455000, 4096, PROT_READ) = 0
347	mprotect(0x7f1cbb675000, 4096, PROT_READ) = 0
348	mprotect(0x55681985c000, 4096, PROT_READ) = 0
349	mprotect(0x7f1cbb8a4000, 4096, PROT_READ) = 0
350	munmap(0x7f1cbb899000, 30013) = 0
351	set_tid_address(0x7f1cbb896190) = 26291
352	set_robust_list(0x7f1cbb8961a0, 24) = 0
353	rt_sigaction(SIGRTMIN, {sa_handler=0x7f1cba1e6bd0, sa_mask=[], sa_flags=SA_RESTORER\|SA_SIGINFO, sa_restorer=0x7f1cba1f20c0}, NULL, 8) = 0
354	rt_sigaction(SIGRT_1, {sa_handler=0x7f1cba1e6c60, sa_mask=[], sa_flags=SA_RESTORER\|SA_RESTART\|SA_SIGINFO, sa_restorer=0x7f1cba1f20c0}, NULL, 8) = 0
355	rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
356	getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
357	statfs("/sys/fs/selinux", 0x7ffd14b1d1e0) = -1 ENOENT (No such file or directory)
358	statfs("/selinux", 0x7ffd14b1d1e0) = -1 ENOENT (No such file or directory)
359	brk(NULL) = 0x55681a721000
360	brk(0x55681a742000) = 0x55681a742000
361	open("/proc/filesystems", O_RDONLY) = 3
362	fstat(3, {st_mode=S_IFREG\|0444, st_size=0, ...}) = 0
363	read(3, "nodev\tsysfs\nnodev\trootfs\nnodev\tr"..., 1024) = 331
364	read(3, "", 1024) = 0
365	close(3) = 0
366	access("/etc/selinux/config", F_OK) = -1 ENOENT (No such file or directory)
367	fcntl(0, F_GETFL) = 0x8002 (flags O_RDWR\|O_LARGEFILE)
368	fcntl(1, F_GETFL) = 0x8002 (flags O_RDWR\|O_LARGEFILE)
369	fcntl(2, F_GETFL) = 0x8002 (flags O_RDWR\|O_LARGEFILE)
370	open("/usr/lib/locale/locale-archive", O_RDONLY\|O_CLOEXEC) = 3
371	fstat(3, {st_mode=S_IFREG\|0644, st_size=1679488, ...}) = 0
372	mmap(NULL, 1679488, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f1cbb6fa000
373	close(3) = 0
374	open("/etc/localtime", O_RDONLY\|O_CLOEXEC) = 3
375	fstat(3, {st_mode=S_IFREG\|0644, st_size=127, ...}) = 0
376	fstat(3, {st_mode=S_IFREG\|0644, st_size=127, ...}) = 0
377	read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"..., 4096) = 127
378	lseek(3, -71, SEEK_CUR) = 56
379	read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\1\0\0\0\0"..., 4096) = 71
380	close(3) = 0
381	stat("/etc/sudo.conf", 0x7ffd14b1cec0) = -1 ENOENT (No such file or directory)
382	geteuid() = 0
383	rt_sigaction(SIGALRM, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
384	rt_sigaction(SIGCHLD, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
385	rt_sigaction(SIGCONT, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
386	rt_sigaction(SIGHUP, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
387	rt_sigaction(SIGINT, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
388	rt_sigaction(SIGPIPE, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
389	rt_sigaction(SIGQUIT, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
390	rt_sigaction(SIGTERM, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
391	rt_sigaction(SIGTSTP, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
392	rt_sigaction(SIGTTIN, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
393	rt_sigaction(SIGTTOU, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
394	rt_sigaction(SIGUSR1, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
395	rt_sigaction(SIGUSR2, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
396	pipe([3, 4]) = 0
397	fcntl(3, F_GETFL) = 0 (flags O_RDONLY)
398	fcntl(3, F_SETFL, O_RDONLY\|O_NONBLOCK) = 0
399	fcntl(4, F_GETFL) = 0x1 (flags O_WRONLY)
400	fcntl(4, F_SETFL, O_WRONLY\|O_NONBLOCK) = 0
401	rt_sigaction(SIGALRM, {sa_handler=0x55681964d7f0, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
402	rt_sigaction(SIGHUP, {sa_handler=0x55681964d7f0, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
403	rt_sigaction(SIGINT, {sa_handler=0x55681964d7f0, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
404	rt_sigaction(SIGQUIT, {sa_handler=0x55681964d7f0, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
405	rt_sigaction(SIGTERM, {sa_handler=0x55681964d7f0, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
406	rt_sigaction(SIGTSTP, {sa_handler=0x55681964d7f0, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
407	rt_sigaction(SIGUSR1, {sa_handler=0x55681964d7f0, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
408	rt_sigaction(SIGUSR2, {sa_handler=0x55681964d7f0, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
409	rt_sigaction(SIGPIPE, {sa_handler=SIG_IGN, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_RESTART, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
410	rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
411	stat("/etc/sudo.conf", 0x7ffd14b1cec0) = -1 ENOENT (No such file or directory)
412	getpid() = 26291
413	getppid() = 26289
414	getpgid(0) = 26288
415	open("/dev/tty", O_RDWR) = 5
416	ioctl(5, TIOCGPGRP, [26288]) = 0
417	close(5) = 0
418	getsid(0) = 1567
419	getuid() = 0
420	geteuid() = 0
421	getgid() = 0
422	getegid() = 0
423	socket(AF_UNIX, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0) = 5
424	connect(5, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
425	close(5) = 0
426	socket(AF_UNIX, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0) = 5
427	connect(5, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
428	close(5) = 0
429	open("/etc/nsswitch.conf", O_RDONLY\|O_CLOEXEC) = 5
430	fstat(5, {st_mode=S_IFREG\|0644, st_size=497, ...}) = 0
431	read(5, "# /etc/nsswitch.conf\n#\n# Example"..., 4096) = 497
432	read(5, "", 4096) = 0
433	close(5) = 0
434	open("/etc/ld.so.cache", O_RDONLY\|O_CLOEXEC) = 5
435	fstat(5, {st_mode=S_IFREG\|0644, st_size=30013, ...}) = 0
436	mmap(NULL, 30013, PROT_READ, MAP_PRIVATE, 5, 0) = 0x7f1cbb899000
437	close(5) = 0
438	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
439	open("/lib/x86_64-linux-gnu/libnss_compat.so.2", O_RDONLY\|O_CLOEXEC) = 5
440	read(5, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\22\0\0\0\0\0\0"..., 832) = 832
441	fstat(5, {st_mode=S_IFREG\|0644, st_size=31616, ...}) = 0
442	mmap(NULL, 2126944, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 5, 0) = 0x7f1cb9fd9000
443	mprotect(0x7f1cb9fe0000, 2093056, PROT_NONE) = 0
444	mmap(0x7f1cba1df000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 5, 0x6000) = 0x7f1cba1df000
445	close(5) = 0
446	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
447	open("/lib/x86_64-linux-gnu/libnsl.so.1", O_RDONLY\|O_CLOEXEC) = 5
448	read(5, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320?\0\0\0\0\0\0"..., 832) = 832
449	fstat(5, {st_mode=S_IFREG\|0644, st_size=89064, ...}) = 0
450	mmap(NULL, 2194008, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 5, 0) = 0x7f1cb9dc1000
451	mprotect(0x7f1cb9dd5000, 2097152, PROT_NONE) = 0
452	mmap(0x7f1cb9fd5000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 5, 0x14000) = 0x7f1cb9fd5000
453	mmap(0x7f1cb9fd7000, 6744, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cb9fd7000
454	close(5) = 0
455	mprotect(0x7f1cb9fd5000, 4096, PROT_READ) = 0
456	mprotect(0x7f1cba1df000, 4096, PROT_READ) = 0
457	munmap(0x7f1cbb899000, 30013) = 0
458	open("/etc/ld.so.cache", O_RDONLY\|O_CLOEXEC) = 5
459	fstat(5, {st_mode=S_IFREG\|0644, st_size=30013, ...}) = 0
460	mmap(NULL, 30013, PROT_READ, MAP_PRIVATE, 5, 0) = 0x7f1cbb899000
461	close(5) = 0
462	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
463	open("/lib/x86_64-linux-gnu/libnss_nis.so.2", O_RDONLY\|O_CLOEXEC) = 5
464	read(5, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340 \0\0\0\0\0\0"..., 832) = 832
465	fstat(5, {st_mode=S_IFREG\|0644, st_size=47688, ...}) = 0
466	mmap(NULL, 2143656, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 5, 0) = 0x7f1cb9bb5000
467	mprotect(0x7f1cb9bc0000, 2093056, PROT_NONE) = 0
468	mmap(0x7f1cb9dbf000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 5, 0xa000) = 0x7f1cb9dbf000
469	close(5) = 0
470	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
471	open("/lib/x86_64-linux-gnu/libnss_files.so.2", O_RDONLY\|O_CLOEXEC) = 5
472	read(5, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320!\0\0\0\0\0\0"..., 832) = 832
473	fstat(5, {st_mode=S_IFREG\|0644, st_size=47632, ...}) = 0
474	mmap(NULL, 2168600, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 5, 0) = 0x7f1cb99a3000
475	mprotect(0x7f1cb99ad000, 2097152, PROT_NONE) = 0
476	mmap(0x7f1cb9bad000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 5, 0xa000) = 0x7f1cb9bad000
477	mmap(0x7f1cb9baf000, 22296, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cb9baf000
478	close(5) = 0
479	mprotect(0x7f1cb9bad000, 4096, PROT_READ) = 0
480	mprotect(0x7f1cb9dbf000, 4096, PROT_READ) = 0
481	munmap(0x7f1cbb899000, 30013) = 0
482	open("/etc/passwd", O_RDONLY\|O_CLOEXEC) = 5
483	lseek(5, 0, SEEK_CUR) = 0
484	fstat(5, {st_mode=S_IFREG\|0644, st_size=1902, ...}) = 0
485	mmap(NULL, 1902, PROT_READ, MAP_SHARED, 5, 0) = 0x7f1cbb8a0000
486	lseek(5, 1902, SEEK_SET) = 1902
487	munmap(0x7f1cbb8a0000, 1902) = 0
488	close(5) = 0
489	open("/proc/sys/kernel/ngroups_max", O_RDONLY) = 5
490	read(5, "65536\n", 31) = 6
491	close(5) = 0
492	getgroups(0, NULL) = 1
493	getgroups(1, [0]) = 1
494	umask(000) = 022
495	umask(022) = 000
496	getcwd("/vagrant/mediawiki", 4096) = 19
497	open("/proc/self/stat", O_RDONLY\|O_NOFOLLOW) = 5
498	read(5, "26291 (sudo) R 26289 26288 1567 "..., 1024) = 322
499	read(5, "", 702) = 0
500	stat("/dev/console", {st_mode=S_IFCHR\|0600, st_rdev=makedev(5, 1), ...}) = 0
501	stat("/dev/pts/0", {st_mode=S_IFCHR\|0620, st_rdev=makedev(136, 0), ...}) = 0
502	close(5) = 0
503	uname({sysname="Linux", nodename="mcr", ...}) = 0
504	ioctl(2, TIOCGWINSZ, {ws_row=62, ws_col=204, ws_xpixel=0, ws_ypixel=0}) = 0
505	getrlimit(RLIMIT_CORE, {rlim_cur=0, rlim_max=RLIM64_INFINITY}) = 0
506	setrlimit(RLIMIT_CORE, {rlim_cur=0, rlim_max=RLIM64_INFINITY}) = 0
507	socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 5
508	bind(5, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 0
509	getsockname(5, {sa_family=AF_NETLINK, nl_pid=26291, nl_groups=00000000}, [12]) = 0
510	sendto(5, {{len=20, type=0x12 /* NLMSG_??? */, flags=NLM_F_REQUEST\|0x300, seq=1525971745, pid=0}, "\0\0\0\0"}, 20, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 20
511	recvmsg(5, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base=[{{len=1232, type=0x10 /* NLMSG_??? /, flags=NLM_F_MULTI, seq=1525971745, pid=26291}, "\0\0\4\3\1\0\0\0I\0\1\0\0\0\0\0\7\0\3\0lo\0\0\10\0\r\0\1\0\0\0"...}, {{len=1240, type=0x10 / NLMSG_??? /, flags=NLM_F_MULTI, seq=1525971745, pid=26291}, "\0\0\1\0\2\0\0\0C\20\1\0\0\0\0\0\t\0\3\0eth0\0\0\0\0\10\0\r\0"...}, {{len=1240, type=0x10 / NLMSG_??? /, flags=NLM_F_MULTI, seq=1525971745, pid=26291}, "\0\0\1\0\3\0\0\0C\20\1\0\0\0\0\0\t\0\3\0eth1\0\0\0\0\10\0\r\0"...}, {{len=0, type=0 / NLMSG_??? */, flags=0, seq=0, pid=0}}], iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 3712
512	recvmsg(5, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base=[{{len=20, type=NLMSG_DONE, flags=NLM_F_MULTI, seq=1525971745, pid=26291}, "\0\0\0\0"}, {{len=1, type=0x49 /* NLMSG_??? */, flags=NLM_F_REQUEST, seq=0, pid=196615}}], iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 20
513	sendto(5, {{len=20, type=0x16 /* NLMSG_??? */, flags=NLM_F_REQUEST\|0x300, seq=1525971746, pid=0}, "\0\0\0\0"}, 20, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 20
514	recvmsg(5, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base=[{{len=76, type=0x14 /* NLMSG_??? /, flags=NLM_F_MULTI, seq=1525971746, pid=26291}, "\2\10\200\376\1\0\0\0\10\0\1\0\177\0\0\1\10\0\2\0\177\0\0\1\7\0\3\0lo\0\0"...}, {{len=88, type=0x14 / NLMSG_??? /, flags=NLM_F_MULTI, seq=1525971746, pid=26291}, "\2\30\200\0\2\0\0\0\10\0\1\0\n\0\2\17\10\0\2\0\n\0\2\17\10\0\4\0\n\0\2\377"...}, {{len=88, type=0x14 / NLMSG_??? /, flags=NLM_F_MULTI, seq=1525971746, pid=26291}, "\2\30\200\0\3\0\0\0\10\0\1\0\n\v\f\207\10\0\2\0\n\v\f\207\10\0\4\0\n\v\f\377"...}, {{len=0, type=0 / NLMSG_??? */, flags=0, seq=0, pid=0}}], iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 252
515	recvmsg(5, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base=[{{len=72, type=0x14 /* NLMSG_??? /, flags=NLM_F_MULTI, seq=1525971746, pid=26291}, "\n\200\200\376\1\0\0\0\24\0\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\24\0\6\0"...}, {{len=72, type=0x14 / NLMSG_??? /, flags=NLM_F_MULTI, seq=1525971746, pid=26291}, "\n@\200\375\2\0\0\0\24\0\1\0\376\200\0\0\0\0\0\0\n\0'\377\376\215\300M\24\0\6\0"...}, {{len=72, type=0x14 / NLMSG_??? /, flags=NLM_F_MULTI, seq=1525971746, pid=26291}, "\n@\200\375\3\0\0\0\24\0\1\0\376\200\0\0\0\0\0\0\n\0'\377\376$t\260\24\0\6\0"...}, {{len=828929125, type=0 / NLMSG_??? */, flags=0, seq=524296, pid=128}, "\24\0\6\0\377\377\377\377\377\377\377\377\320\6\0\0\320\6\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...}], iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 216
516	recvmsg(5, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base=[{{len=20, type=NLMSG_DONE, flags=NLM_F_MULTI, seq=1525971746, pid=26291}, "\0\0\0\0"}, {{len=1, type=0x14 /* NLMSG_??? */, flags=NLM_F_REQUEST, seq=0, pid=0}}], iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 20
517	close(5) = 0
518	stat("/usr/lib/sudo/sudoers.so", {st_mode=S_IFREG\|0644, st_size=337696, ...}) = 0
519	futex(0x7f1cbae190a8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
520	open("/usr/lib/sudo/sudoers.so", O_RDONLY\|O_CLOEXEC) = 5
521	read(5, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20h\0\0\0\0\0\0"..., 832) = 832
522	fstat(5, {st_mode=S_IFREG\|0644, st_size=337696, ...}) = 0
523	mmap(NULL, 2435336, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 5, 0) = 0x7f1cb9750000
524	mprotect(0x7f1cb97a0000, 2093056, PROT_NONE) = 0
525	mmap(0x7f1cb999f000, 12288, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 5, 0x4f000) = 0x7f1cb999f000
526	mmap(0x7f1cb99a2000, 2312, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cb99a2000
527	close(5) = 0
528	open("/usr/lib/sudo/libpam.so.0", O_RDONLY\|O_CLOEXEC) = -1 ENOENT (No such file or directory)
529	open("/etc/ld.so.cache", O_RDONLY\|O_CLOEXEC) = 5
530	fstat(5, {st_mode=S_IFREG\|0644, st_size=30013, ...}) = 0
531	mmap(NULL, 30013, PROT_READ, MAP_PRIVATE, 5, 0) = 0x7f1cbb899000
532	close(5) = 0
533	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
534	open("/lib/x86_64-linux-gnu/libpam.so.0", O_RDONLY\|O_CLOEXEC) = 5
535	read(5, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260&\0\0\0\0\0\0"..., 832) = 832
536	fstat(5, {st_mode=S_IFREG\|0644, st_size=56016, ...}) = 0
537	mmap(NULL, 2151000, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 5, 0) = 0x7f1cb9542000
538	mprotect(0x7f1cb954f000, 2093056, PROT_NONE) = 0
539	mmap(0x7f1cb974e000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 5, 0xc000) = 0x7f1cb974e000
540	close(5) = 0
541	mprotect(0x7f1cb974e000, 4096, PROT_READ) = 0
542	mprotect(0x7f1cb999f000, 4096, PROT_READ) = 0
543	munmap(0x7f1cbb899000, 30013) = 0
544	stat("/usr/lib/sudo/sudoers.so", {st_mode=S_IFREG\|0644, st_size=337696, ...}) = 0
545	open("/usr/share/locale/locale.alias", O_RDONLY\|O_CLOEXEC) = 5
546	fstat(5, {st_mode=S_IFREG\|0644, st_size=2995, ...}) = 0
547	read(5, "# Locale name alias data base.\n#"..., 4096) = 2995
548	read(5, "", 4096) = 0
549	close(5) = 0
550	open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/sudoers.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
551	open("/usr/share/locale/en_US.utf8/LC_MESSAGES/sudoers.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
552	open("/usr/share/locale/en_US/LC_MESSAGES/sudoers.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
553	open("/usr/share/locale/en.UTF-8/LC_MESSAGES/sudoers.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
554	open("/usr/share/locale/en.utf8/LC_MESSAGES/sudoers.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
555	open("/usr/share/locale/en/LC_MESSAGES/sudoers.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
556	open("/etc/passwd", O_RDONLY\|O_CLOEXEC) = 5
557	lseek(5, 0, SEEK_CUR) = 0
558	fstat(5, {st_mode=S_IFREG\|0644, st_size=1902, ...}) = 0
559	mmap(NULL, 1902, PROT_READ, MAP_SHARED, 5, 0) = 0x7f1cbb8a0000
560	lseek(5, 1902, SEEK_SET) = 1902
561	munmap(0x7f1cbb8a0000, 1902) = 0
562	close(5) = 0
563	getresuid([0], [0], [0]) = 0
564	getresgid([0], [0], [0]) = 0
565	open("/etc/passwd", O_RDONLY\|O_CLOEXEC) = 5
566	lseek(5, 0, SEEK_CUR) = 0
567	fstat(5, {st_mode=S_IFREG\|0644, st_size=1902, ...}) = 0
568	mmap(NULL, 1902, PROT_READ, MAP_SHARED, 5, 0) = 0x7f1cbb8a0000
569	lseek(5, 1902, SEEK_SET) = 1902
570	munmap(0x7f1cbb8a0000, 1902) = 0
571	close(5) = 0
572	open("/etc/nsswitch.conf", O_RDONLY) = 5
573	fstat(5, {st_mode=S_IFREG\|0644, st_size=497, ...}) = 0
574	read(5, "# /etc/nsswitch.conf\n#\n# Example"..., 4096) = 497
575	read(5, "", 4096) = 0
576	close(5) = 0
577	setresuid(-1, 1, -1) = 0
578	stat("/etc/sudoers", {st_mode=S_IFREG\|0440, st_size=669, ...}) = 0
579	open("/etc/sudoers", O_RDONLY) = 5
580	fstat(5, {st_mode=S_IFREG\|0440, st_size=669, ...}) = 0
581	read(5, "#\n# This file MUST be edited wit"..., 4096) = 669
582	lseek(5, 0, SEEK_SET) = 0
583	fcntl(5, F_SETFD, FD_CLOEXEC) = 0
584	setresuid(-1, 0, -1) = 0
585	setresuid(-1, 0, -1) = 0
586	setresgid(-1, -1, -1) = 0
587	ioctl(5, TCGETS, 0x7ffd14b1ce00) = -1 ENOTTY (Inappropriate ioctl for device)
588	read(5, "#\n# This file MUST be edited wit"..., 8192) = 669
589	read(5, "", 4096) = 0
590	stat("/etc/sudoers.d", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
591	open("/etc/sudoers.d", O_RDONLY\|O_NONBLOCK\|O_DIRECTORY\|O_CLOEXEC) = 6
592	fstat(6, {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
593	getdents(6, /* 4 entries */, 32768) = 112
594	stat("/etc/sudoers.d/README", {st_mode=S_IFREG\|0440, st_size=958, ...}) = 0
595	stat("/etc/sudoers.d/vagrant", {st_mode=S_IFREG\|0440, st_size=31, ...}) = 0
596	getdents(6, /* 0 entries */, 32768) = 0
597	close(6) = 0
598	setresuid(-1, 1, -1) = 0
599	stat("/etc/sudoers.d/README", {st_mode=S_IFREG\|0440, st_size=958, ...}) = 0
600	open("/etc/sudoers.d/README", O_RDONLY) = 6
601	fstat(6, {st_mode=S_IFREG\|0440, st_size=958, ...}) = 0
602	read(6, "#\n# As of Debian version 1.7.2p1"..., 4096) = 958
603	lseek(6, 0, SEEK_SET) = 0
604	fcntl(6, F_SETFD, FD_CLOEXEC) = 0
605	setresuid(-1, 0, -1) = 0
606	setresuid(-1, 0, -1) = 0
607	setresgid(-1, -1, -1) = 0
608	ioctl(6, TCGETS, 0x7ffd14b1cc50) = -1 ENOTTY (Inappropriate ioctl for device)
609	read(6, "#\n# As of Debian version 1.7.2p1"..., 8192) = 958
610	read(6, "", 4096) = 0
611	read(6, "", 8192) = 0
612	ioctl(6, TCGETS, 0x7ffd14b1ce00) = -1 ENOTTY (Inappropriate ioctl for device)
613	close(6) = 0
614	setresuid(-1, 1, -1) = 0
615	stat("/etc/sudoers.d/vagrant", {st_mode=S_IFREG\|0440, st_size=31, ...}) = 0
616	open("/etc/sudoers.d/vagrant", O_RDONLY) = 6
617	fstat(6, {st_mode=S_IFREG\|0440, st_size=31, ...}) = 0
618	read(6, "vagrant ALL=(ALL) NOPASSWD:ALL\n", 4096) = 31
619	lseek(6, 0, SEEK_SET) = 0
620	fcntl(6, F_SETFD, FD_CLOEXEC) = 0
621	setresuid(-1, 0, -1) = 0
622	setresuid(-1, 0, -1) = 0
623	setresgid(-1, -1, -1) = 0
624	ioctl(6, TCGETS, 0x7ffd14b1ce00) = -1 ENOTTY (Inappropriate ioctl for device)
625	read(6, "vagrant ALL=(ALL) NOPASSWD:ALL\n", 8192) = 31
626	read(6, "", 4096) = 0
627	read(6, "", 8192) = 0
628	ioctl(6, TCGETS, 0x7ffd14b1ce00) = -1 ENOTTY (Inappropriate ioctl for device)
629	close(6) = 0
630	read(5, "", 8192) = 0
631	ioctl(5, TCGETS, 0x7ffd14b1ce00) = -1 ENOTTY (Inappropriate ioctl for device)
632	socket(AF_UNIX, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0) = 6
633	connect(6, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
634	close(6) = 0
635	socket(AF_UNIX, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0) = 6
636	connect(6, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
637	close(6) = 0
638	open("/etc/host.conf", O_RDONLY\|O_CLOEXEC) = 6
639	fstat(6, {st_mode=S_IFREG\|0644, st_size=9, ...}) = 0
640	read(6, "multi on\n", 4096) = 9
641	read(6, "", 4096) = 0
642	close(6) = 0
643	futex(0x7f1cbac14a64, FUTEX_WAKE_PRIVATE, 2147483647) = 0
644	getpid() = 26291
645	open("/etc/resolv.conf", O_RDONLY\|O_CLOEXEC) = 6
646	fstat(6, {st_mode=S_IFREG\|0644, st_size=20, ...}) = 0
647	read(6, "nameserver 10.0.2.3\n", 4096) = 20
648	read(6, "", 4096) = 0
649	close(6) = 0
650	uname({sysname="Linux", nodename="mcr", ...}) = 0
651	open("/etc/hosts", O_RDONLY\|O_CLOEXEC) = 6
652	fstat(6, {st_mode=S_IFREG\|0644, st_size=263, ...}) = 0
653	read(6, "127.0.0.1\tmcr.mediawiki-vagrant."..., 4096) = 263
654	read(6, "", 4096) = 0
655	close(6) = 0
656	setresuid(-1, -1, -1) = 0
657	setresgid(-1, -1, -1) = 0
658	getrlimit(RLIMIT_NPROC, {rlim_cur=7929, rlim_max=7929}) = 0
659	setrlimit(RLIMIT_NPROC, {rlim_cur=RLIM64_INFINITY, rlim_max=RLIM64_INFINITY}) = 0
660	getresuid([0], [0], [0]) = 0
661	getresgid([0], [0], [0]) = 0
662	setresgid(-1, 33, -1) = 0
663	open("/proc/sys/kernel/ngroups_max", O_RDONLY) = 6
664	read(6, "65536\n", 31) = 6
665	close(6) = 0
666	mmap(NULL, 528384, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f1cb94c1000
667	mmap(NULL, 528384, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, -1, 0) = 0x7f1cb9440000
668	socket(AF_UNIX, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0) = 6
669	connect(6, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
670	close(6) = 0
671	socket(AF_UNIX, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0) = 6
672	connect(6, {sa_family=AF_UNIX, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory)
673	close(6) = 0
674	open("/etc/group", O_RDONLY\|O_CLOEXEC) = 6
675	lseek(6, 0, SEEK_CUR) = 0
676	fstat(6, {st_mode=S_IFREG\|0644, st_size=881, ...}) = 0
677	mmap(NULL, 881, PROT_READ, MAP_SHARED, 6, 0) = 0x7f1cbb8a0000
678	lseek(6, 881, SEEK_SET) = 881
679	fstat(6, {st_mode=S_IFREG\|0644, st_size=881, ...}) = 0
680	munmap(0x7f1cbb8a0000, 881) = 0
681	close(6) = 0
682	munmap(0x7f1cb9440000, 528384) = 0
683	munmap(0x7f1cb94c1000, 528384) = 0
684	setgroups(1, [33]) = 0
685	setresuid(-1, 33, -1) = 0
686	stat("/usr/local/bin/mwscript", {st_mode=S_IFREG\|0755, st_size=269, ...}) = 0
687	setresuid(-1, 0, -1) = 0
688	setresuid(-1, 0, -1) = 0
689	setresgid(-1, 0, -1) = 0
690	setgroups(1, [0]) = 0
691	setresgid(-1, 33, -1) = 0
692	setgroups(1, [33]) = 0
693	setresuid(-1, 33, -1) = 0
694	open("/etc/group", O_RDONLY\|O_CLOEXEC) = 6
695	lseek(6, 0, SEEK_CUR) = 0
696	fstat(6, {st_mode=S_IFREG\|0644, st_size=881, ...}) = 0
697	mmap(NULL, 881, PROT_READ, MAP_SHARED, 6, 0) = 0x7f1cbb8a0000
698	lseek(6, 881, SEEK_SET) = 881
699	munmap(0x7f1cbb8a0000, 881) = 0
700	close(6) = 0
701	setresuid(-1, 0, -1) = 0
702	setresuid(-1, 0, -1) = 0
703	setresgid(-1, 0, -1) = 0
704	setgroups(1, [0]) = 0
705	stat("/etc/pam.d", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
706	open("/etc/pam.d/sudo", O_RDONLY) = 6
707	fstat(6, {st_mode=S_IFREG\|0644, st_size=95, ...}) = 0
708	read(6, "#%PAM-1.0\n\n@include common-auth\n"..., 4096) = 95
709	stat("/etc/pam.d", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
710	open("/etc/pam.d/common-auth", O_RDONLY) = 7
711	fstat(7, {st_mode=S_IFREG\|0644, st_size=1221, ...}) = 0
712	read(7, "#\n# /etc/pam.d/common-auth - aut"..., 4096) = 1221
713	open("/lib/x86_64-linux-gnu/security/pam_unix.so", O_RDONLY\|O_CLOEXEC) = 8
714	read(8, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000)\0\0\0\0\0\0"..., 832) = 832
715	fstat(8, {st_mode=S_IFREG\|0644, st_size=60336, ...}) = 0
716	mmap(NULL, 2204640, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 8, 0) = 0x7f1cb9327000
717	mprotect(0x7f1cb9334000, 2097152, PROT_NONE) = 0
718	mmap(0x7f1cb9534000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 8, 0xd000) = 0x7f1cb9534000
719	mmap(0x7f1cb9536000, 46048, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cb9536000
720	close(8) = 0
721	open("/etc/ld.so.cache", O_RDONLY\|O_CLOEXEC) = 8
722	fstat(8, {st_mode=S_IFREG\|0644, st_size=30013, ...}) = 0
723	mmap(NULL, 30013, PROT_READ, MAP_PRIVATE, 8, 0) = 0x7f1cbb899000
724	close(8) = 0
725	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
726	open("/lib/x86_64-linux-gnu/libcrypt.so.1", O_RDONLY\|O_CLOEXEC) = 8
727	read(8, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p\v\0\0\0\0\0\0"..., 832) = 832
728	fstat(8, {st_mode=S_IFREG\|0644, st_size=39256, ...}) = 0
729	mmap(NULL, 2322912, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 8, 0) = 0x7f1cb90ef000
730	mprotect(0x7f1cb90f7000, 2097152, PROT_NONE) = 0
731	mmap(0x7f1cb92f7000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 8, 0x8000) = 0x7f1cb92f7000
732	mmap(0x7f1cb92f9000, 184800, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cb92f9000
733	close(8) = 0
734	mprotect(0x7f1cb92f7000, 4096, PROT_READ) = 0
735	mprotect(0x7f1cb9534000, 4096, PROT_READ) = 0
736	munmap(0x7f1cbb899000, 30013) = 0
737	open("/lib/x86_64-linux-gnu/security/pam_deny.so", O_RDONLY\|O_CLOEXEC) = 8
738	read(8, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240\5\0\0\0\0\0\0"..., 832) = 832
739	fstat(8, {st_mode=S_IFREG\|0644, st_size=6000, ...}) = 0
740	mmap(NULL, 2101288, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 8, 0) = 0x7f1cb8eed000
741	mprotect(0x7f1cb8eee000, 2093056, PROT_NONE) = 0
742	mmap(0x7f1cb90ed000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 8, 0) = 0x7f1cb90ed000
743	close(8) = 0
744	mprotect(0x7f1cb90ed000, 4096, PROT_READ) = 0
745	open("/lib/x86_64-linux-gnu/security/pam_permit.so", O_RDONLY\|O_CLOEXEC) = 8
746	read(8, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\6\0\0\0\0\0\0"..., 832) = 832
747	fstat(8, {st_mode=S_IFREG\|0644, st_size=6168, ...}) = 0
748	mmap(NULL, 2101312, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 8, 0) = 0x7f1cb8ceb000
749	mprotect(0x7f1cb8cec000, 2093056, PROT_NONE) = 0
750	mmap(0x7f1cb8eeb000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 8, 0) = 0x7f1cb8eeb000
751	close(8) = 0
752	mprotect(0x7f1cb8eeb000, 4096, PROT_READ) = 0
753	read(7, "", 4096) = 0
754	close(7) = 0
755	stat("/etc/pam.d", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
756	open("/etc/pam.d/common-account", O_RDONLY) = 7
757	fstat(7, {st_mode=S_IFREG\|0644, st_size=1208, ...}) = 0
758	read(7, "#\n# /etc/pam.d/common-account - "..., 4096) = 1208
759	read(7, "", 4096) = 0
760	close(7) = 0
761	stat("/etc/pam.d", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
762	open("/etc/pam.d/common-session-noninteractive", O_RDONLY) = 7
763	fstat(7, {st_mode=S_IFREG\|0644, st_size=1154, ...}) = 0
764	read(7, "#\n# /etc/pam.d/common-session-no"..., 4096) = 1154
765	read(7, "", 4096) = 0
766	close(7) = 0
767	read(6, "", 4096) = 0
768	close(6) = 0
769	open("/etc/pam.d/other", O_RDONLY) = 6
770	fstat(6, {st_mode=S_IFREG\|0644, st_size=520, ...}) = 0
771	read(6, "#\n# /etc/pam.d/other - specify t"..., 4096) = 520
772	stat("/etc/pam.d", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
773	open("/etc/pam.d/common-auth", O_RDONLY) = 7
774	fstat(7, {st_mode=S_IFREG\|0644, st_size=1221, ...}) = 0
775	read(7, "#\n# /etc/pam.d/common-auth - aut"..., 4096) = 1221
776	read(7, "", 4096) = 0
777	close(7) = 0
778	stat("/etc/pam.d", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
779	open("/etc/pam.d/common-account", O_RDONLY) = 7
780	fstat(7, {st_mode=S_IFREG\|0644, st_size=1208, ...}) = 0
781	read(7, "#\n# /etc/pam.d/common-account - "..., 4096) = 1208
782	read(7, "", 4096) = 0
783	close(7) = 0
784	stat("/etc/pam.d", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
785	open("/etc/pam.d/common-password", O_RDONLY) = 7
786	fstat(7, {st_mode=S_IFREG\|0644, st_size=1440, ...}) = 0
787	read(7, "#\n# /etc/pam.d/common-password -"..., 4096) = 1440
788	read(7, "", 4096) = 0
789	close(7) = 0
790	stat("/etc/pam.d", {st_mode=S_IFDIR\|0755, st_size=4096, ...}) = 0
791	open("/etc/pam.d/common-session", O_RDONLY) = 7
792	fstat(7, {st_mode=S_IFREG\|0644, st_size=1189, ...}) = 0
793	read(7, "#\n# /etc/pam.d/common-session - "..., 4096) = 1189
794	open("/lib/x86_64-linux-gnu/security/pam_systemd.so", O_RDONLY\|O_CLOEXEC) = 8
795	read(8, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\0\0\0\0\0\0\0"..., 832) = 832
796	fstat(8, {st_mode=S_IFREG\|0644, st_size=279032, ...}) = 0
797	mmap(NULL, 282752, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 8, 0) = 0x7f1cbb6b4000
798	mmap(0x7f1cbb6f5000, 16384, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 8, 0x40000) = 0x7f1cbb6f5000
799	mmap(0x7f1cbb6f9000, 128, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_ANONYMOUS, -1, 0) = 0x7f1cbb6f9000
800	close(8) = 0
801	open("/etc/ld.so.cache", O_RDONLY\|O_CLOEXEC) = 8
802	fstat(8, {st_mode=S_IFREG\|0644, st_size=30013, ...}) = 0
803	mmap(NULL, 30013, PROT_READ, MAP_PRIVATE, 8, 0) = 0x7f1cbb899000
804	close(8) = 0
805	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
806	open("/lib/x86_64-linux-gnu/librt.so.1", O_RDONLY\|O_CLOEXEC) = 8
807	read(8, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340 \0\0\0\0\0\0"..., 832) = 832
808	fstat(8, {st_mode=S_IFREG\|0644, st_size=31744, ...}) = 0
809	mmap(NULL, 2128832, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 8, 0) = 0x7f1cb8ae3000
810	mprotect(0x7f1cb8aea000, 2093056, PROT_NONE) = 0
811	mmap(0x7f1cb8ce9000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 8, 0x6000) = 0x7f1cb8ce9000
812	close(8) = 0
813	access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
814	open("/lib/x86_64-linux-gnu/libpam_misc.so.0", O_RDONLY\|O_CLOEXEC) = 8
815	read(8, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\20\0\0\0\0\0\0"..., 832) = 832
816	fstat(8, {st_mode=S_IFREG\|0644, st_size=14640, ...}) = 0
817	mmap(NULL, 2109744, PROT_READ\|PROT_EXEC, MAP_PRIVATE\|MAP_DENYWRITE, 8, 0) = 0x7f1cb88df000
818	mprotect(0x7f1cb88e2000, 2093056, PROT_NONE) = 0
819	mmap(0x7f1cb8ae1000, 8192, PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_FIXED\|MAP_DENYWRITE, 8, 0x2000) = 0x7f1cb8ae1000
820	close(8) = 0
821	mprotect(0x7f1cb8ae1000, 4096, PROT_READ) = 0
822	mprotect(0x7f1cb8ce9000, 4096, PROT_READ) = 0
823	mprotect(0x7f1cbb6f5000, 12288, PROT_READ) = 0
824	munmap(0x7f1cbb899000, 30013) = 0
825	read(7, "", 4096) = 0
826	close(7) = 0
827	read(6, "", 4096) = 0
828	close(6) = 0
829	open("/etc/passwd", O_RDONLY\|O_CLOEXEC) = 6
830	lseek(6, 0, SEEK_CUR) = 0
831	fstat(6, {st_mode=S_IFREG\|0644, st_size=1902, ...}) = 0
832	mmap(NULL, 1902, PROT_READ, MAP_SHARED, 6, 0) = 0x7f1cbb8a0000
833	lseek(6, 1902, SEEK_SET) = 1902
834	munmap(0x7f1cbb8a0000, 1902) = 0
835	close(6) = 0
836	socket(AF_UNIX, SOCK_DGRAM\|SOCK_CLOEXEC, 0) = 6
837	connect(6, {sa_family=AF_UNIX, sun_path="/dev/log"}, 110) = 0
838	sendto(6, "<85>May 10 17:02:25 sudo: ro"..., 131, MSG_NOSIGNAL, NULL, 0) = 131
839	close(6) = 0
840	setresuid(-1, -1, -1) = 0
841	setresgid(-1, -1, -1) = 0
842	close(5) = 0
843	socket(AF_NETLINK, SOCK_RAW, NETLINK_AUDIT) = 5
844	fcntl(5, F_SETFD, FD_CLOEXEC) = 0
845	fcntl(5, F_SETFD, FD_CLOEXEC) = 0
846	ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
847	fstat(0, {st_mode=S_IFCHR\|0620, st_rdev=makedev(136, 0), ...}) = 0
848	readlink("/proc/self/fd/0", "/dev/pts/0", 31) = 10
849	stat("/dev/pts/0", {st_mode=S_IFCHR\|0620, st_rdev=makedev(136, 0), ...}) = 0
850	lstat("/dev/pts/0", {st_mode=S_IFCHR\|0620, st_rdev=makedev(136, 0), ...}) = 0
851	getcwd("/vagrant/mediawiki", 4096) = 19
852	sendto(5, {{len=140, type=0x463 /* NLMSG_??? */, flags=NLM_F_REQUEST\|NLM_F_ACK, seq=1, pid=0}, "cwd=\"/vagrant/mediawiki\" cmd=2F7"...}, 140, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 140
853	poll([{fd=5, events=POLLIN}], 1, 500) = 1 ([{fd=5, revents=POLLIN}])
854	recvfrom(5, {{len=36, type=NLMSG_ERROR, flags=0, seq=1, pid=26291}, "\0\0\0\0\214\0\0\0c\4\5\0\1\0\0\0\0\0\0\0"}, 8988, MSG_PEEK\|MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
855	recvfrom(5, {{len=36, type=NLMSG_ERROR, flags=0, seq=1, pid=26291}, "\0\0\0\0\214\0\0\0c\4\5\0\1\0\0\0\0\0\0\0"}, 8988, MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
856	setresuid(-1, -1, -1) = 0
857	setresgid(-1, -1, -1) = 0
858	setrlimit(RLIMIT_NPROC, {rlim_cur=7929, rlim_max=7929}) = 0
859	open("/etc/passwd", O_RDONLY\|O_CLOEXEC) = 6
860	lseek(6, 0, SEEK_CUR) = 0
861	fstat(6, {st_mode=S_IFREG\|0644, st_size=1902, ...}) = 0
862	mmap(NULL, 1902, PROT_READ, MAP_SHARED, 6, 0) = 0x7f1cbb8a0000
863	lseek(6, 1902, SEEK_SET) = 1902
864	munmap(0x7f1cbb8a0000, 1902) = 0
865	close(6) = 0
866	open("/etc/passwd", O_RDONLY\|O_CLOEXEC) = 6
867	lseek(6, 0, SEEK_CUR) = 0
868	fstat(6, {st_mode=S_IFREG\|0644, st_size=1902, ...}) = 0
869	mmap(NULL, 1902, PROT_READ, MAP_SHARED, 6, 0) = 0x7f1cbb8a0000
870	lseek(6, 1902, SEEK_SET) = 1902
871	munmap(0x7f1cbb8a0000, 1902) = 0
872	close(6) = 0
873	setuid(0) = 0
874	setrlimit(RLIMIT_CORE, {rlim_cur=0, rlim_max=RLIM64_INFINITY}) = 0
875	read(3, 0x7ffd14b1cf00, 1) = -1 EAGAIN (Resource temporarily unavailable)
876	socketpair(AF_UNIX, SOCK_STREAM, 0, [6, 7]) = 0
877	rt_sigaction(SIGTERM, {sa_handler=0x556819643200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
878	rt_sigaction(SIGHUP, {sa_handler=0x556819643200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
879	rt_sigaction(SIGALRM, {sa_handler=0x556819643200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
880	rt_sigaction(SIGPIPE, {sa_handler=0x556819643200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
881	rt_sigaction(SIGUSR1, {sa_handler=0x556819643200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
882	rt_sigaction(SIGUSR2, {sa_handler=0x556819643200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
883	rt_sigaction(SIGINT, {sa_handler=0x556819643140, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
884	rt_sigaction(SIGQUIT, {sa_handler=0x556819643140, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
885	setgroups(1, [33]) = 0
886	setgid(33) = 0
887	socket(AF_NETLINK, SOCK_RAW, NETLINK_AUDIT) = 8
888	fcntl(8, F_SETFD, FD_CLOEXEC) = 0
889	readlink("/proc/self/exe", "/usr/bin/sudo", 4096) = 13
890	sendto(8, {{len=120, type=0x456 /* NLMSG_??? */, flags=NLM_F_REQUEST\|NLM_F_ACK, seq=2, pid=0}, "op=PAM:setcred acct=\"www-data\" e"...}, 120, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 120
891	poll([{fd=8, events=POLLIN}], 1, 500) = 1 ([{fd=8, revents=POLLIN}])
892	recvfrom(8, {{len=36, type=NLMSG_ERROR, flags=0, seq=2, pid=2844428582}, "\0\0\0\0x\0\0\0V\4\5\0\2\0\0\0\0\0\0\0"}, 8988, MSG_PEEK\|MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
893	recvfrom(8, {{len=36, type=NLMSG_ERROR, flags=0, seq=2, pid=2844428582}, "\0\0\0\0x\0\0\0V\4\5\0\2\0\0\0\0\0\0\0"}, 8988, MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
894	close(8) = 0
895	getuid() = 0
896	open("/etc/login.defs", O_RDONLY) = 8
897	fstat(8, {st_mode=S_IFREG\|0644, st_size=10477, ...}) = 0
898	read(8, "#\n# /etc/login.defs - Configurat"..., 4096) = 4096
899	read(8, " issuing \n# the \"mesg y\" command"..., 4096) = 4096
900	read(8, "t supports passwords of unlimite"..., 4096) = 2285
901	close(8) = 0
902	access("/var/run/utmpx", F_OK) = -1 ENOENT (No such file or directory)
903	open("/var/run/utmp", O_RDONLY\|O_CLOEXEC) = 8
904	lseek(8, 0, SEEK_SET) = 0
905	alarm(0) = 0
906	rt_sigaction(SIGALRM, {sa_handler=0x7f1cba993f20, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f1cba8aa030}, {sa_handler=0x556819643200, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, 8) = 0
907	alarm(10) = 0
908	fcntl(8, F_SETLKW, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0
909	read(8, "\2\0\0\0\0\0\0\0~\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
910	read(8, "\6\0\0\0<\2\0\0tty1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
911	read(8, "\1\0\0\0005\0\0\0~\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
912	read(8, "\7\0\0\0\26\6\0\0pts/0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 384) = 384
913	fcntl(8, F_SETLKW, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0
914	alarm(0) = 10
915	rt_sigaction(SIGALRM, {sa_handler=0x556819643200, sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
916	close(8) = 0
917	getuid() = 0
918	socket(AF_UNIX, SOCK_DGRAM\|SOCK_CLOEXEC, 0) = 8
919	connect(8, {sa_family=AF_UNIX, sun_path="/dev/log"}, 110) = 0
920	sendto(8, "<86>May 10 17:02:25 sudo: pam_un"..., 100, MSG_NOSIGNAL, NULL, 0) = 100
921	socket(AF_NETLINK, SOCK_RAW, NETLINK_AUDIT) = 9
922	fcntl(9, F_SETFD, FD_CLOEXEC) = 0
923	sendto(9, {{len=124, type=0x451 /* NLMSG_??? */, flags=NLM_F_REQUEST\|NLM_F_ACK, seq=3, pid=0}, "op=PAM:session_open acct=\"www-da"...}, 124, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 124
924	poll([{fd=9, events=POLLIN}], 1, 500) = 1 ([{fd=9, revents=POLLIN}])
925	recvfrom(9, {{len=36, type=NLMSG_ERROR, flags=0, seq=3, pid=3270505455}, "\0\0\0\0\|\0\0\0Q\4\5\0\3\0\0\0\0\0\0\0"}, 8988, MSG_PEEK\|MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
926	recvfrom(9, {{len=36, type=NLMSG_ERROR, flags=0, seq=3, pid=3270505455}, "\0\0\0\0\|\0\0\0Q\4\5\0\3\0\0\0\0\0\0\0"}, 8988, MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
927	close(9) = 0
928	getpgrp() = 26288
929	rt_sigaction(SIGCHLD, {sa_handler=0x556819643200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
930	rt_sigaction(SIGCONT, {sa_handler=0x556819643200, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
931	rt_sigaction(SIGTSTP, {sa_handler=0x556819643140, sa_mask=~[RTMIN RT_1], sa_flags=SA_RESTORER\|SA_INTERRUPT\|SA_SIGINFO, sa_restorer=0x7f1cba8aa030}, NULL, 8) = 0
932	clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID\|CLONE_CHILD_SETTID\|SIGCHLD, child_tidptr=0x7f1cbb896190) = 26294
933	close(7) = 0
934	poll([{fd=3, events=POLLIN}, {fd=6, events=POLLIN}], 2, -1) = 1 ([{fd=6, revents=POLLIN\|POLLHUP}])
935	recvfrom(6, "", 8, MSG_WAITALL, NULL, NULL) = 0
936	poll([{fd=3, events=POLLIN}], 1, -1PHP Notice: Writing to /root/.config/psysh is not allowed. in /vagrant/mediawiki/vendor/psy/psysh/src/Psy/ConfigPaths.php on line 213
937	PHP Stack trace:
938	PHP 1. {main}() /var/www/w/MWScript.php:0
939	PHP 2. require_once() /var/www/w/MWScript.php:98
940	PHP 3. require_once() /vagrant/mediawiki/maintenance/shell.php:100
941	PHP 4. MediaWikiShell->execute() /vagrant/mediawiki/maintenance/doMaintenance.php:94
942	PHP 5. Psy\Shell->__construct() /vagrant/mediawiki/maintenance/shell.php:72
943	PHP 6. Psy\Configuration->getReadline() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/Shell.php:82
944	PHP 7. Psy\Configuration->getHistoryFile() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/Configuration.php:546
945	PHP 8. Psy\Configuration->setHistoryFile() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/Configuration.php:409
946	PHP 9. Psy\ConfigPaths::touchFileWithMkdir() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/Configuration.php:361
947	PHP 10. trigger_error() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/ConfigPaths.php:213
948
949	Notice: Writing to /root/.config/psysh is not allowed. in /vagrant/mediawiki/vendor/psy/psysh/src/Psy/ConfigPaths.php on line 213
950
951	Call Stack:
952	0.0002 362176 1. {main}() /var/www/w/MWScript.php:0
953	0.0028 411296 2. require_once('/vagrant/mediawiki/maintenance/shell.php') /var/www/w/MWScript.php:98
954	0.0075 689936 3. require_once('/vagrant/mediawiki/maintenance/doMaintenance.php') /vagrant/mediawiki/maintenance/shell.php:100
955	0.3292 9960848 4. MediaWikiShell->execute() /vagrant/mediawiki/maintenance/doMaintenance.php:94
956	0.6119 12357400 5. Psy\Shell->__construct() /vagrant/mediawiki/maintenance/shell.php:72
957	0.6211 12427496 6. Psy\Configuration->getReadline() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/Shell.php:82
958	0.6276 12521008 7. Psy\Configuration->getHistoryFile() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/Configuration.php:546
959	0.6278 12521272 8. Psy\Configuration->setHistoryFile() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/Configuration.php:409
960	0.6278 12521272 9. Psy\ConfigPaths::touchFileWithMkdir() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/Configuration.php:361
961	0.6348 12562568 10. trigger_error() /vagrant/mediawiki/vendor/psy/psysh/src/Psy/ConfigPaths.php:213
962
963	Psy Shell v0.8.11 (PHP 7.0.27-0+deb9u1 — cli) by Justin Hileman
964	>>> 1
965	=> 1
966	>>> ^D
967	Exit: Ctrl+D
968	) = ? ERESTART_RESTARTBLOCK (Interrupted by signal)
969	--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=26294, si_uid=33, si_status=0, si_utime=22, si_stime=13} ---
970	write(4, "\21", 1) = 1
971	rt_sigreturn({mask=[]}) = -1 EINTR (Interrupted system call)
972	poll([{fd=3, events=POLLIN}], 1, -1) = 1 ([{fd=3, revents=POLLIN}])
973	read(3, "\21", 1) = 1
974	wait4(26294, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WNOHANG\|WSTOPPED, NULL) = 26294
975	getuid() = 0
976	open("/etc/login.defs", O_RDONLY) = 7
977	fstat(7, {st_mode=S_IFREG\|0644, st_size=10477, ...}) = 0
978	read(7, "#\n# /etc/login.defs - Configurat"..., 4096) = 4096
979	read(7, " issuing \n# the \"mesg y\" command"..., 4096) = 4096
980	read(7, "t supports passwords of unlimite"..., 4096) = 2285
981	close(7) = 0
982	sendto(8, "<86>May 10 17:02:30 sudo: pam_un"..., 82, MSG_NOSIGNAL, NULL, 0) = 82
983	socket(AF_NETLINK, SOCK_RAW, NETLINK_AUDIT) = 7
984	fcntl(7, F_SETFD, FD_CLOEXEC) = 0
985	sendto(7, {{len=124, type=0x452 /* NLMSG_??? */, flags=NLM_F_REQUEST\|NLM_F_ACK, seq=4, pid=0}, "op=PAM:session_close acct=\"www-d"...}, 124, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 124
986	poll([{fd=7, events=POLLIN}], 1, 500) = 1 ([{fd=7, revents=POLLIN}])
987	recvfrom(7, {{len=36, type=NLMSG_ERROR, flags=0, seq=4, pid=2237329034}, "\0\0\0\0\|\0\0\0R\4\5\0\4\0\0\0\0\0\0\0"}, 8988, MSG_PEEK\|MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
988	recvfrom(7, {{len=36, type=NLMSG_ERROR, flags=0, seq=4, pid=2237329034}, "\0\0\0\0\|\0\0\0R\4\5\0\4\0\0\0\0\0\0\0"}, 8988, MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
989	close(7) = 0
990	socket(AF_NETLINK, SOCK_RAW, NETLINK_AUDIT) = 7
991	fcntl(7, F_SETFD, FD_CLOEXEC) = 0
992	sendto(7, {{len=120, type=0x450 /* NLMSG_??? */, flags=NLM_F_REQUEST\|NLM_F_ACK, seq=5, pid=0}, "op=PAM:setcred acct=\"www-data\" e"...}, 120, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 120
993	poll([{fd=7, events=POLLIN}], 1, 500) = 1 ([{fd=7, revents=POLLIN}])
994	recvfrom(7, {{len=36, type=NLMSG_ERROR, flags=0, seq=5, pid=2347360514}, "\0\0\0\0x\0\0\0P\4\5\0\5\0\0\0\0\0\0\0"}, 8988, MSG_PEEK\|MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
995	recvfrom(7, {{len=36, type=NLMSG_ERROR, flags=0, seq=5, pid=2347360514}, "\0\0\0\0x\0\0\0P\4\5\0\5\0\0\0\0\0\0\0"}, 8988, MSG_DONTWAIT, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, [12]) = 36
996	close(7) = 0
997	munmap(0x7f1cb9327000, 2204640) = 0
998	munmap(0x7f1cb90ef000, 2322912) = 0
999	munmap(0x7f1cb8eed000, 2101288) = 0
1000	munmap(0x7f1cb8ceb000, 2101312) = 0
1001	munmap(0x7f1cbb6b4000, 282752) = 0
1002	munmap(0x7f1cb88df000, 2109744) = 0
1003	exit_group(0) = ?
1004	+++ exited with 0 +++
1005	```

I can't really read strace but the relevant line seems to be

rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER, 0x7f3eeea360e0}, {0x443740, [], SA_RESTORER, 0x7f3eeea360e0}, 8) = 0

Tgr updated the task description. (Show Details)May 30 2018, 12:51 PM

Tgr updated the task description. (Show Details)

The problem comes with assumptions we do about how we want to fork processes from HHVM in production and how shell.php assumes forks should be treated:

by default, we use a non-zero number of "light processes" as HHVM calls them, which are preforked children of the main process with certain characteristics, and that can be used any time pcntl_fork is used, or a external command is executed. That speeds the execution up sensibly, but it bears some non-standard behaviour.

Specifically, your example works if you disable light processes:

sudo -u www-data hhvm -d hhvm.server.light_process_count=0 /srv/mediawiki/multiversion/MWScript.php shell.php enwiki

(please note that in this case the php alias doesn't work as expected as you can't pass -d to hhvm when it's invoked with the -p switch, or as php. Yes, that's crazy :P)

Tgr updated the task description. (Show Details)May 30 2018, 2:29 PM

Change 439954 had a related patch set uploaded (by Gergő Tisza; owner: Gergő Tisza):
[mediawiki/vendor@master] PsySH: 0.8.11 -> 0.9.6

https://gerrit.wikimedia.org/r/439954

gerritbot added a project: Patch-For-Review.Jun 12 2018, 3:56 PM

• Mholloway unsubscribed.Jun 12 2018, 4:55 PM

Change 439954 merged by jenkins-bot:
[mediawiki/vendor@master] PsySH: 0.8.11 -> 0.9.6

https://gerrit.wikimedia.org/r/439954

ReleaseTaggerBot added a project: MW-1.32-notes (WMF-deploy-2018-06-26 (1.32.0-wmf.10)).Jun 13 2018, 2:00 PM

Still happening on beta (but not in production).

Lucas_Werkmeister_WMDE subscribed.Apr 24 2019, 2:28 PM

Workaround: PHP="hhvm -d hhvm.server.light_process_count=0" mwscript shell.php enwiki

PHP=php7.2 also seems to work (since these “light processes” are HHVM-specific), so presumably this will resolve itself once we use PHP7 everywhere? (Specifically T195392, I guess.)

Lucas_Werkmeister_WMDE mentioned this in T228041: Using shell.php in production fails to load personal configuration and sends warnings to Logstash.Jul 15 2019, 12:28 PM

I think this has been resolved with the switch to PHP7 – I can now run shell.php on mwdebug1002 or mwmaint1002 (prod) and deployment-deploy01 (beta) without any workarounds.

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shell.php broken on most production hosts
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