When `drill` works but `nc` doesn't
Niklaas Baudet von Gersdorff
stdin at niklaas.eu
Sun Sep 18 11:34:16 UTC 2016
Marko Turk [2016-09-17 21:23 +0200] :
> > $ sudo jexec www1 truss -D -o /tmp/truss-hostname nc -z mysql2.box-hlm-03.klaas 3306
> >
> > $ sudo jexec www1 truss -D -o /tmp/truss-IP nc -z 10.3.5.3 3306
> > [cut]
>
> Can you also post truss output when doing drill and tcpdump when doing
> netcat with hostname?
Of course. Please find attached "truss-drill" and
"tcpdump-netcat". The first one I created with
$ sudo jexec www1 truss -o /tmp/truss-drill drill mysql2.box-hlm-03.klaas
the second one with
1 $ sudo tcpdump -nettti lo0 \
2 \( src host 10.3.4.1 or \
3 src host fd16:dcc0:f4cc:3::4:1 or \
4 src host fd16:dcc0:f4cc:77::4:1 \) \
5 and not \( dst host 10.77.2.1 \
6 or dst host fd16:dcc0:f4cc:77::2:1 \) \
7 and not port 8080 and not \
8 \( host 10.3.2.1 or fd16:dcc0:f4cc:3::2:1 \) > \
9 /tmp/tcpdump-nc
As you can see, I filtered out quite some packets in lines 5-8.
10.77.2.1 and 10.3.2.1 and the corresponding IPv6s are a proxy
server that does health checks; plus I have a busy varnish-nginx
set-up that communicates on port 8080. If I hadn't filtered out
these packets, the dump would be unreadable.
Investigating the dump I came across the following line:
00:00:00.000265 AF IPv4 (2), length 60: 10.3.4.1 > 10.3.3.1: ICMP 10.3.4.1 udp port 17918 unreachable, length 36
I assume this is the reason why a connection cannot be
established. However, IPv6 seems to work fine:
00:00:01.040444 AF IPv6 (28), length 93: fd16:dcc0:f4cc:77::4:1.31169 > fd16:dcc0:f4cc:77::3:1.53: 44819+ A? mysql2.box-hlm-03.klaas. (41)
Do you have an idea why UDP isn't reachable on IPv4 but on IPv6?
Thanks for asking for the tcpdump! This brought me quite a bit
further in disclosing the root cause.
Niklaas
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00:00:00.000000 AF IPv4 (2), length 73: 10.3.4.1.17918 > 10.77.3.1.53: 44819+ A? mysql2.box-hlm-03.klaas. (41)
00:00:00.000265 AF IPv4 (2), length 60: 10.3.4.1 > 10.3.3.1: ICMP 10.3.4.1 udp port 17918 unreachable, length 36
00:00:01.040444 AF IPv6 (28), length 93: fd16:dcc0:f4cc:77::4:1.31169 > fd16:dcc0:f4cc:77::3:1.53: 44819+ A? mysql2.box-hlm-03.klaas. (41)
00:00:00.000455 AF IPv4 (2), length 73: 10.3.4.1.61780 > 10.77.3.1.53: 21031+ AAAA? mysql2.box-hlm-03.klaas. (41)
00:00:00.000221 AF IPv4 (2), length 60: 10.3.4.1 > 10.3.3.1: ICMP 10.3.4.1 udp port 61780 unreachable, length 36
00:00:01.045336 AF IPv6 (28), length 93: fd16:dcc0:f4cc:77::4:1.60056 > fd16:dcc0:f4cc:77::3:1.53: 21031+ AAAA? mysql2.box-hlm-03.klaas. (41)
00:00:00.000475 AF IPv4 (2), length 64: 10.3.4.1.53964 > 10.3.5.3.3306: Flags [S], seq 4253776386, win 65535, options [mss 16344,nop,wscale 6,sackOK,TS val 1533743777 ecr 0], length 0
00:00:00.000083 AF IPv4 (2), length 56: 10.3.4.1.53964 > 10.3.5.3.3306: Flags [.], ack 2619685739, win 1275, options [nop,nop,TS val 1533743777 ecr 3163274380], length 0
00:00:00.000916 AF IPv4 (2), length 56: 10.3.4.1.53964 > 10.3.5.3.3306: Flags [F.], seq 0, ack 1, win 1275, options [nop,nop,TS val 1533743778 ecr 3163274380], length 0
00:00:00.001262 AF IPv4 (2), length 44: 10.3.4.1.53964 > 10.3.5.3.3306: Flags [R], seq 4253776388, win 0, length 0
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mmap(0x0,32768,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) = 34366210048 (0x80062c000)
issetugid() = 0 (0x0)
__sysctl(0x7fffffffe090,0x2,0x80082c148,0x7fffffffe088,0x0,0x0) = 0 (0x0)
__sysctl(0x7fffffffe090,0x2,0x80082c248,0x7fffffffe088,0x0,0x0) = 0 (0x0)
__sysctl(0x7fffffffe090,0x2,0x80082c348,0x7fffffffe088,0x0,0x0) = 0 (0x0)
__sysctl(0x7fffffffe090,0x2,0x80082c448,0x7fffffffe088,0x0,0x0) = 0 (0x0)
__sysctl(0x7fffffffe090,0x2,0x80082c548,0x7fffffffe088,0x0,0x0) = 0 (0x0)
lstat("/etc",{ mode=lrwxr-xr-x ,inode=2332518,size=8,blksize=32768 }) = 0 (0x0)
readlink("/etc","jail/etc",1023) = 8 (0x8)
lstat("/jail",{ mode=drwxr-xr-x ,inode=3612142,size=512,blksize=32768 }) = 0 (0x0)
lstat("/jail/etc",{ mode=drwxr-xr-x ,inode=3612144,size=2048,blksize=32768 }) = 0 (0x0)
lstat("/jail/etc/libmap.conf",{ mode=-rw-r--r-- ,inode=3613494,size=109,blksize=32768 }) = 0 (0x0)
openat(AT_FDCWD,"/jail/etc/libmap.conf",O_CLOEXEC,00) = 3 (0x3)
fstat(3,{ mode=-rw-r--r-- ,inode=3613494,size=109,blksize=32768 }) = 0 (0x0)
mmap(0x0,109,PROT_READ,MAP_PRIVATE,3,0x0) = 34366242816 (0x800634000)
close(3) = 0 (0x0)
lstat("/usr",{ mode=drwxr-xr-x ,inode=2332529,size=512,blksize=32768 }) = 0 (0x0)
lstat("/usr/local",{ mode=lrwxr-xr-x ,inode=2332695,size=17,blksize=32768 }) = 0 (0x0)
readlink("/usr/local","../jail/usr/local",1023) = 17 (0x11)
lstat("/jail",{ mode=drwxr-xr-x ,inode=3612142,size=512,blksize=32768 }) = 0 (0x0)
lstat("/jail/usr",{ mode=drwxr-xr-x ,inode=3612143,size=512,blksize=32768 }) = 0 (0x0)
lstat("/jail/usr/local",{ mode=drwxr-xr-x ,inode=3613799,size=512,blksize=32768 }) = 0 (0x0)
lstat("/jail/usr/local/etc",{ mode=drwxr-xr-x ,inode=3613802,size=1024,blksize=32768 }) = 0 (0x0)
lstat("/jail/usr/local/etc/libmap.d",0x7fffffffc738) ERR#2 'No such file or directory'
munmap(0x800634000,109) = 0 (0x0)
access("/usr/lib/private/libldns.so.5",F_OK) = 0 (0x0)
openat(AT_FDCWD,"/usr/lib/private/libldns.so.5",O_CLOEXEC,00) = 3 (0x3)
fstat(3,{ mode=-r--r--r-- ,inode=2490086,size=375976,blksize=32768 }) = 0 (0x0)
mmap(0x0,4096,PROT_READ,MAP_PRIVATE|MAP_PREFAULT_READ,3,0x0) = 34366242816 (0x800634000)
mmap(0x0,2473984,PROT_NONE,MAP_PRIVATE|MAP_ANON|MAP_NOCORE,-1,0x0) = 34368311296 (0x80082d000)
mmap(0x80082d000,352256,PROT_READ|PROT_EXEC,MAP_PRIVATE|MAP_FIXED|MAP_NOCORE|MAP_PREFAULT_READ,3,0x0) = 34368311296 (0x80082d000)
mmap(0x800a83000,24576,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_FIXED|MAP_PREFAULT_READ,3,0x56000) = 34370760704 (0x800a83000)
munmap(0x800634000,4096) = 0 (0x0)
close(3) = 0 (0x0)
access("/usr/lib/private/libcrypto.so.7",F_OK) ERR#2 'No such file or directory'
openat(AT_FDCWD,"/var/run/ld-elf.so.hints",O_CLOEXEC,00) = 3 (0x3)
read(3,"Ehnt\^A\0\0\0\M^@\0\0\0{\0\0\0\0"...,128) = 128 (0x80)
lseek(3,0x80,SEEK_SET) = 128 (0x80)
read(3,"/lib:/usr/lib:/usr/lib/compat:/u"...,123) = 123 (0x7b)
close(3) = 0 (0x0)
access("/lib/libcrypto.so.7",F_OK) = 0 (0x0)
openat(AT_FDCWD,"/lib/libcrypto.so.7",O_CLOEXEC,00) = 3 (0x3)
fstat(3,{ mode=-r--r--r-- ,inode=2332569,size=2043248,blksize=32768 }) = 0 (0x0)
mmap(0x0,4096,PROT_READ,MAP_PRIVATE|MAP_PREFAULT_READ,3,0x0) = 34366242816 (0x800634000)
mmap(0x0,4149248,PROT_NONE,MAP_PRIVATE|MAP_ANON|MAP_NOCORE,-1,0x0) = 34370785280 (0x800a89000)
mmap(0x800a89000,1884160,PROT_READ|PROT_EXEC,MAP_PRIVATE|MAP_FIXED|MAP_NOCORE|MAP_PREFAULT_READ,3,0x0) = 34370785280 (0x800a89000)
mmap(0x800e54000,163840,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_FIXED|MAP_PREFAULT_READ,3,0x1cb000) = 34374762496 (0x800e54000)
mmap(0x800e7c000,8192,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_FIXED|MAP_ANON,-1,0x0) = 34374926336 (0x800e7c000)
munmap(0x800634000,4096) = 0 (0x0)
close(3) = 0 (0x0)
access("/usr/lib/private/libc.so.7",F_OK) ERR#2 'No such file or directory'
access("/lib/libc.so.7",F_OK) = 0 (0x0)
openat(AT_FDCWD,"/lib/libc.so.7",O_CLOEXEC,00) = 3 (0x3)
fstat(3,{ mode=-r--r--r-- ,inode=2332548,size=1647104,blksize=32768 }) = 0 (0x0)
mmap(0x0,4096,PROT_READ,MAP_PRIVATE|MAP_PREFAULT_READ,3,0x0) = 34366242816 (0x800634000)
mmap(0x0,3854336,PROT_NONE,MAP_PRIVATE|MAP_ANON|MAP_NOCORE,-1,0x0) = 34374934528 (0x800e7e000)
mmap(0x800e7e000,1536000,PROT_READ|PROT_EXEC,MAP_PRIVATE|MAP_FIXED|MAP_NOCORE|MAP_PREFAULT_READ,3,0x0) = 34374934528 (0x800e7e000)
mmap(0x8011f5000,49152,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_FIXED|MAP_PREFAULT_READ,3,0x177000) = 34378567680 (0x8011f5000)
mmap(0x801201000,172032,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_FIXED|MAP_ANON,-1,0x0) = 34378616832 (0x801201000)
munmap(0x800634000,4096) = 0 (0x0)
close(3) = 0 (0x0)
munmap(0x800633000,4096) = 0 (0x0)
mmap(0x0,40960,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) = 34366238720 (0x800633000)
munmap(0x80063b000,8192) = 0 (0x0)
mmap(0x0,102400,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) = 34366271488 (0x80063b000)
sysarch(AMD64_SET_FSBASE,0x7fffffffe118) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
readlink("/etc/malloc.conf",0x7fffffffd840,1024) ERR#2 'No such file or directory'
issetugid() = 0 (0x0)
mmap(0x0,4194304,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) = 34378788864 (0x80122b000)
munmap(0x80122b000,4194304) = 0 (0x0)
mmap(0x0,8384512,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) = 34378788864 (0x80122b000)
munmap(0x80122b000,1921024) = 0 (0x0)
munmap(0x801800000,2269184) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
mmap(0x0,4194304,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANON,-1,0x0) = 34384904192 (0x801800000)
open("/dev/urandom",O_RDONLY,0666) = 3 (0x3)
fstat(3,{ mode=crw-rw-rw- ,inode=32,size=0,blksize=4096 }) = 0 (0x0)
ioctl(3,0x402c7413 { IOR 0x74('t'), 19, 44 },0xffffe810) ERR#25 'Inappropriate ioctl for device'
read(3,"r\M-7\M-|\M-4\^?\M^K\M--4\M-P"...,4096) = 4096 (0x1000)
madvise(0x801809000,0x1000,0x5) = 0 (0x0)
close(3) = 0 (0x0)
madvise(0x801808000,0x1000,0x5) = 0 (0x0)
open("/etc/resolv.conf",O_RDONLY,0666) = 3 (0x3)
fstat(3,{ mode=-rw-r--r-- ,inode=3613500,size=84,blksize=32768 }) = 0 (0x0)
read(3,"options timeout:1 attempts:1\nna"...,32768) = 84 (0x54)
read(3,0x80180b000,32768) = 0 (0x0)
close(3) = 0 (0x0)
madvise(0x80180b000,0x8000,0x5) = 0 (0x0)
clock_gettime(13,{ 1474195380.000000000 }) = 0 (0x0)
getpid() = 3728 (0xe90)
getpid() = 3728 (0xe90)
__sysctl(0x7fffffffe798,0x2,0x7fffffffe6f8,0x7fffffffe790,0x0,0x0) = 0 (0x0)
getpid() = 3728 (0xe90)
getpid() = 3728 (0xe90)
getpid() = 3728 (0xe90)
getpid() = 3728 (0xe90)
getpid() = 3728 (0xe90)
getpid() = 3728 (0xe90)
getpid() = 3728 (0xe90)
getpid() = 3728 (0xe90)
getpid() = 3728 (0xe90)
gettimeofday({ 1474195380.500596 },0x0) = 0 (0x0)
socket(PF_INET6,SOCK_DGRAM,17) = 3 (0x3)
sendto(3,"\M-fo\^A\0\0\^A\0\0\0\0\0\0\^Fmy"...,41,0x0,{ AF_INET6 [fd16:dcc0:f4cc:77::3:1]:53 },0x1c) = 41 (0x29)
select(4,{ 3 },0x0,0x0,{ 5.000000 }) = 1 (0x1)
fcntl(3,F_GETFL,) = 2 (0x2)
fcntl(3,F_SETFL,O_NONBLOCK|0x2) = 0 (0x0)
recvfrom(3,"\M-fo\M^A\M^@\0\^A\0\^A\0\^B\0"...,65535,0x0,NULL,0x0) = 194 (0xc2)
madvise(0x80181c000,0x10000,0x5) = 0 (0x0)
close(3) = 0 (0x0)
gettimeofday({ 1474195380.501734 },0x0) = 0 (0x0)
madvise(0x80180f000,0x1000,0x5) = 0 (0x0)
madvise(0x801814000,0x1000,0x5) = 0 (0x0)
madvise(0x80182c000,0x1000,0x5) = 0 (0x0)
madvise(0x801824000,0x10000,0x5) = 0 (0x0)
access("/etc/localtime",R_OK) = 0 (0x0)
open("/etc/localtime",O_RDONLY,01) = 3 (0x3)
fstat(3,{ mode=-r--r--r-- ,inode=3613502,size=2309,blksize=32768 }) = 0 (0x0)
read(3,"TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0"...,41448) = 2309 (0x905)
close(3) = 0 (0x0)
issetugid() = 0 (0x0)
open("/usr/share/zoneinfo/posixrules",O_RDONLY,00) = 3 (0x3)
fstat(3,{ mode=-r--r--r-- ,inode=2490722,size=3519,blksize=32768 }) = 0 (0x0)
read(3,"TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0"...,41448) = 3519 (0xdbf)
close(3) = 0 (0x0)
madvise(0x801835000,0xc000,0x5) = 0 (0x0)
madvise(0x801824000,0x1000,0x5) = 0 (0x0)
madvise(0x801830000,0x5000,0x5) = 0 (0x0)
madvise(0x801825000,0xb000,0x5) = 0 (0x0)
madvise(0x801814000,0x10000,0x5) = 0 (0x0)
fstat(1,{ mode=crw--w---- ,inode=145,size=0,blksize=4096 }) = 0 (0x0)
ioctl(1,0x402c7413 { IOR 0x74('t'), 19, 44 },0xffffe820) = 0 (0x0)
write(1,";; ->>HEADER<<- opcode: QUERY, r"...,57) = 57 (0x39)
write(1,";; flags: qr rd ra ; QUERY: 1, A"...,71) = 71 (0x47)
write(1,";; QUESTION SECTION:\n",21) = 21 (0x15)
write(1,";; mysql2.box-hlm-03.klaas.\tIN"...,33) = 33 (0x21)
write(1,"\n",1) = 1 (0x1)
write(1,";; ANSWER SECTION:\n",19) = 19 (0x13)
write(1,"mysql2.box-hlm-03.klaas.\t3542\t"...,44) = 44 (0x2c)
write(1,"\n",1) = 1 (0x1)
write(1,";; AUTHORITY SECTION:\n",22) = 22 (0x16)
write(1,"klaas.\t609\tIN\tNS\tnsd1.box-hl"...,40) = 40 (0x28)
write(1,"klaas.\t609\tIN\tNS\tnsd1.box-hl"...,40) = 40 (0x28)
write(1,"\n",1) = 1 (0x1)
write(1,";; ADDITIONAL SECTION:\n",23) = 23 (0x17)
write(1,"nsd1.box-hlm-01.klaas.\t609\tIN"...,41) = 41 (0x29)
write(1,"nsd1.box-hlm-03.klaas.\t609\tIN"...,41) = 41 (0x29)
write(1,"nsd1.box-hlm-01.klaas.\t609\tIN"...,57) = 57 (0x39)
write(1,"nsd1.box-hlm-03.klaas.\t609\tIN"...,57) = 57 (0x39)
write(1,"\n",1) = 1 (0x1)
write(1,";; Query time: 1 msec\n",22) = 22 (0x16)
write(1,";; SERVER: fd16:dcc0:f4cc:77::3:"...,34) = 34 (0x22)
write(1,";; WHEN: Sun Sep 18 12:43:00 201"...,34) = 34 (0x22)
write(1,";; MSG SIZE rcvd: 194\n",23) = 23 (0x17)
madvise(0x801824000,0x1000,0x5) = 0 (0x0)
madvise(0x80180d000,0x2000,0x5) = 0 (0x0)
madvise(0x80180b000,0x1000,0x5) = 0 (0x0)
madvise(0x801813000,0x1000,0x5) = 0 (0x0)
madvise(0x801808000,0x1000,0x5) = 0 (0x0)
madvise(0x801806000,0x1000,0x5) = 0 (0x0)
madvise(0x801807000,0x1000,0x5) = 0 (0x0)
madvise(0x801809000,0x1000,0x5) = 0 (0x0)
madvise(0x801806000,0x1000,0x5) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
sigprocmask(SIG_BLOCK,{ SIGHUP|SIGINT|SIGQUIT|SIGKILL|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIGCHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|SIGINFO|SIGUSR1|SIGUSR2 },{ }) = 0 (0x0)
sigprocmask(SIG_SETMASK,{ },0x0) = 0 (0x0)
process exit, rval = 0
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