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| [op@12002824 ~]$ strace -tt -T ping -c 1 xxx.com
13:42:35.810276 execve("/usr/bin/ping", ["ping", "-c", "1", "xxx.com"], [/* 29 vars */]) = 0 <0.000541>
13:42:35.811240 brk(0) = 0x7ff9d7b47000 <0.000187>
13:42:35.811671 fcntl(0, F_GETFD) = 0 <0.000140>
13:42:35.812035 fcntl(1, F_GETFD) = 0 <0.000107>
13:42:35.812336 fcntl(2, F_GETFD) = 0 <0.000047>
13:42:35.812542 access("/etc/suid-debug", F_OK) = -1 ENOENT (No such file or directory) <0.000056>
13:42:35.812853 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6427000 <0.000097>
13:42:35.813064 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) <0.000052>
13:42:35.813223 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 <0.000025>
13:42:35.813307 fstat(3, {st_mode=S_IFREG|0644, st_size=59413, ...}) = 0 <0.000012>
13:42:35.813356 mmap(NULL, 59413, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7ff9d6418000 <0.000015>
13:42:35.813400 close(3) = 0 <0.000008>
13:42:35.813442 open("/usr/lib64/libcap.so.2", O_RDONLY|O_CLOEXEC) = 3 <0.000012>
13:42:35.813481 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 \26\0\0\0\0\0\0"..., 832) = 832 <0.000009>
13:42:35.813519 fstat(3, {st_mode=S_IFREG|0755, st_size=20024, ...}) = 0 <0.000008>
13:42:35.813561 mmap(NULL, 2114112, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7ff9d6002000 <0.000011>
13:42:35.813599 mprotect(0x7ff9d6006000, 2093056, PROT_NONE) = 0 <0.000011>
13:42:35.813638 mmap(0x7ff9d6205000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7ff9d6205000 <0.000012>
13:42:35.813684 close(3) = 0 <0.000008>
13:42:35.813722 open("/usr/lib64/libidn.so.11", O_RDONLY|O_CLOEXEC) = 3 <0.000012>
13:42:35.813763 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0000\0\0\0\0\0\0"..., 832) = 832 <0.000009>
13:42:35.813801 fstat(3, {st_mode=S_IFREG|0755, st_size=208928, ...}) = 0 <0.000007>
13:42:35.813839 mmap(NULL, 2302416, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7ff9d5dcf000 <0.000009>
13:42:35.813875 mprotect(0x7ff9d5e01000, 2093056, PROT_NONE) = 0 <0.000009>
13:42:35.813910 mmap(0x7ff9d6000000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x31000) = 0x7ff9d6000000 <0.000010>
13:42:35.813954 close(3) = 0 <0.000008>
13:42:35.813991 open("/usr/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 <0.000010>
13:42:35.814030 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P%\2\0\0\0\0\0"..., 832) = 832 <0.000008>
13:42:35.814067 fstat(3, {st_mode=S_IFREG|0755, st_size=2173512, ...}) = 0 <0.000007>
13:42:35.814104 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6417000 <0.000008>
13:42:35.814143 mmap(NULL, 3981792, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7ff9d5a02000 <0.000009>
13:42:35.814179 mprotect(0x7ff9d5bc5000, 2093056, PROT_NONE) = 0 <0.000012>
13:42:35.814217 mmap(0x7ff9d5dc4000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c2000) = 0x7ff9d5dc4000 <0.000011>
13:42:35.814257 mmap(0x7ff9d5dca000, 16864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7ff9d5dca000 <0.000010>
13:42:35.814298 close(3) = 0 <0.000007>
13:42:35.814336 open("/usr/lib64/libattr.so.1", O_RDONLY|O_CLOEXEC) = 3 <0.000011>
13:42:35.814375 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\23\0\0\0\0\0\0"..., 832) = 832 <0.000009>
13:42:35.814413 fstat(3, {st_mode=S_IFREG|0755, st_size=19888, ...}) = 0 <0.000008>
13:42:35.814450 mmap(NULL, 2113904, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7ff9d57fd000 <0.000010>
13:42:35.814488 mprotect(0x7ff9d5801000, 2093056, PROT_NONE) = 0 <0.000010>
13:42:35.814524 mmap(0x7ff9d5a00000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7ff9d5a00000 <0.000011>
13:42:35.814569 close(3) = 0 <0.000008>
13:42:35.814613 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6416000 <0.000009>
13:42:35.814651 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6414000 <0.000008>
13:42:35.814691 arch_prctl(ARCH_SET_FS, 0x7ff9d6414740) = 0 <0.000008>
13:42:35.814775 mprotect(0x7ff9d5dc4000, 16384, PROT_READ) = 0 <0.000011>
13:42:35.814817 mprotect(0x7ff9d5a00000, 4096, PROT_READ) = 0 <0.000009>
13:42:35.814862 mprotect(0x7ff9d6000000, 4096, PROT_READ) = 0 <0.000009>
13:42:35.814900 mprotect(0x7ff9d6205000, 4096, PROT_READ) = 0 <0.000009>
13:42:35.814957 mprotect(0x7ff9d6634000, 4096, PROT_READ) = 0 <0.000009>
13:42:35.814994 mprotect(0x7ff9d6428000, 4096, PROT_READ) = 0 <0.000009>
13:42:35.815029 munmap(0x7ff9d6418000, 59413) = 0 <0.000013>
13:42:35.815117 brk(0) = 0x7ff9d7b47000 <0.000008>
13:42:35.815152 brk(0x7ff9d7b68000) = 0x7ff9d7b68000 <0.000009>
13:42:35.815186 brk(0) = 0x7ff9d7b68000 <0.000007>
13:42:35.815224 capget({_LINUX_CAPABILITY_VERSION_3, 0}, NULL) = 0 <0.000009>
13:42:35.815264 capget({_LINUX_CAPABILITY_VERSION_3, 0}, {CAP_NET_ADMIN|CAP_NET_RAW, CAP_NET_ADMIN|CAP_NET_RAW, 0}) = 0 <0.000008>
13:42:35.815303 capget({_LINUX_CAPABILITY_VERSION_3, 0}, NULL) = 0 <0.000007>
13:42:35.815340 capset({_LINUX_CAPABILITY_VERSION_3, 0}, {0, CAP_NET_ADMIN|CAP_NET_RAW, 0}) = 0 <0.000008>
13:42:35.815378 prctl(PR_SET_KEEPCAPS, 1) = 0 <0.000008>
13:42:35.815414 getuid() = 1000 <0.000008>
13:42:35.815448 setuid(1000) = 0 <0.000009>
13:42:35.815481 prctl(PR_SET_KEEPCAPS, 0) = 0 <0.000008>
13:42:35.815515 getuid() = 1000 <0.000007>
13:42:35.815554 geteuid() = 1000 <0.000008>
13:42:35.815601 open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3 <0.000012>
13:42:35.815642 fstat(3, {st_mode=S_IFREG|0644, st_size=106070960, ...}) = 0 <0.000007>
13:42:35.815680 mmap(NULL, 106070960, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7ff9cf2d4000 <0.000011>
13:42:35.815720 close(3) = 0 <0.000008>
13:42:35.815774 capget({_LINUX_CAPABILITY_VERSION_3, 0}, NULL) = 0 <0.000008>
13:42:35.815810 capget({_LINUX_CAPABILITY_VERSION_3, 0}, {0, CAP_NET_ADMIN|CAP_NET_RAW, 0}) = 0 <0.000008>
13:42:35.815849 capset({_LINUX_CAPABILITY_VERSION_3, 0}, {CAP_NET_RAW, CAP_NET_ADMIN|CAP_NET_RAW, 0}) = 0 <0.000008>
13:42:35.815889 socket(PF_INET, SOCK_RAW, IPPROTO_ICMP) = 3 <0.000013>
13:42:35.815935 capget({_LINUX_CAPABILITY_VERSION_3, 0}, NULL) = 0 <0.000007>
13:42:35.815970 capget({_LINUX_CAPABILITY_VERSION_3, 0}, {CAP_NET_RAW, CAP_NET_ADMIN|CAP_NET_RAW, 0}) = 0 <0.000008>
13:42:35.816007 capset({_LINUX_CAPABILITY_VERSION_3, 0}, {0, CAP_NET_ADMIN|CAP_NET_RAW, 0}) = 0 <0.000009>
13:42:35.816075 stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=72, ...}) = 0 <0.000011>
13:42:35.816125 open("/etc/host.conf", O_RDONLY|O_CLOEXEC) = 4 <0.000011>
13:42:35.816168 fstat(4, {st_mode=S_IFREG|0644, st_size=9, ...}) = 0 <0.000008>
13:42:35.816205 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6426000 <0.000009>
13:42:35.816242 read(4, "multi on\n", 4096) = 9 <0.000011>
13:42:35.816287 read(4, "", 4096) = 0 <0.000008>
13:42:35.816323 close(4) = 0 <0.000009>
13:42:35.816357 munmap(0x7ff9d6426000, 4096) = 0 <0.000012>
13:42:35.816396 open("/etc/resolv.conf", O_RDONLY|O_CLOEXEC) = 4 <0.000010>
13:42:35.816436 fstat(4, {st_mode=S_IFREG|0644, st_size=72, ...}) = 0 <0.000008>
13:42:35.816473 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6426000 <0.000008>
13:42:35.816510 read(4, "nameserver 119.29.29.29\nnameserv"..., 4096) = 72 <0.000010>
13:42:35.816551 read(4, "", 4096) = 0 <0.000008>
13:42:35.816585 close(4) = 0 <0.000009>
13:42:35.816620 munmap(0x7ff9d6426000, 4096) = 0 <0.000011>
13:42:35.816657 uname({sys="Linux", node="12002824", ...}) = 0 <0.000008>
13:42:35.816707 socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 4 <0.000012>
13:42:35.816746 connect(4, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) <0.000018>
13:42:35.816853 close(4) = 0 <0.000010>
13:42:35.816893 socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 4 <0.000009>
13:42:35.816929 connect(4, {sa_family=AF_LOCAL, sun_path="/var/run/nscd/socket"}, 110) = -1 ENOENT (No such file or directory) <0.000011>
13:42:35.816970 close(4) = 0 <0.000009>
13:42:35.817009 open("/etc/nsswitch.conf", O_RDONLY|O_CLOEXEC) = 4 <0.000010>
13:42:35.817047 fstat(4, {st_mode=S_IFREG|0644, st_size=1717, ...}) = 0 <0.000008>
13:42:35.817085 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6426000 <0.000009>
13:42:35.817122 read(4, "#\n# /etc/nsswitch.conf\n#\n# An ex"..., 4096) = 1717 <0.000010>
13:42:35.817170 read(4, "", 4096) = 0 <0.000008>
13:42:35.817205 close(4) = 0 <0.000008>
13:42:35.817239 munmap(0x7ff9d6426000, 4096) = 0 <0.000010>
13:42:35.817284 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4 <0.000010>
13:42:35.817322 fstat(4, {st_mode=S_IFREG|0644, st_size=59413, ...}) = 0 <0.000007>
13:42:35.817358 mmap(NULL, 59413, PROT_READ, MAP_PRIVATE, 4, 0) = 0x7ff9d6418000 <0.000009>
13:42:35.817394 close(4) = 0 <0.000008>
13:42:35.817433 open("/usr/lib64/libnss_files.so.2", O_RDONLY|O_CLOEXEC) = 4 <0.000011>
13:42:35.817473 read(4, "\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 <0.000009>
13:42:35.817510 fstat(4, {st_mode=S_IFREG|0755, st_size=62184, ...}) = 0 <0.000008>
13:42:35.817549 mmap(NULL, 2173048, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x7ff9cf0c1000 <0.000012>
13:42:35.817587 mprotect(0x7ff9cf0cd000, 2093056, PROT_NONE) = 0 <0.000012>
13:42:35.817626 mmap(0x7ff9cf2cc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0xb000) = 0x7ff9cf2cc000 <0.000012>
13:42:35.817669 mmap(0x7ff9cf2ce000, 22648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7ff9cf2ce000 <0.000009>
13:42:35.817711 close(4) = 0 <0.000008>
13:42:35.817755 mprotect(0x7ff9cf2cc000, 4096, PROT_READ) = 0 <0.000011>
13:42:35.817799 munmap(0x7ff9d6418000, 59413) = 0 <0.000011>
13:42:35.817844 open("/etc/hosts", O_RDONLY|O_CLOEXEC) = 4 <0.000011>
13:42:35.817885 fstat(4, {st_mode=S_IFREG|0644, st_size=271, ...}) = 0 <0.000008>
13:42:35.817922 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6426000 <0.000009>
13:42:35.817959 read(4, "127.0.0.1 localhost localhost."..., 4096) = 271 <0.000010>
13:42:35.818006 read(4, "", 4096) = 0 <0.000008>
13:42:35.818042 close(4) = 0 <0.000009>
13:42:35.818076 munmap(0x7ff9d6426000, 4096) = 0 <0.000010>
13:42:35.818115 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 4 <0.000010>
13:42:35.818153 fstat(4, {st_mode=S_IFREG|0644, st_size=59413, ...}) = 0 <0.000008>
13:42:35.818190 mmap(NULL, 59413, PROT_READ, MAP_PRIVATE, 4, 0) = 0x7ff9d6418000 <0.000009>
13:42:35.818226 close(4) = 0 <0.000007>
13:42:35.818264 open("/usr/lib64/libnss_dns.so.2", O_RDONLY|O_CLOEXEC) = 4 <0.000011>
13:42:35.818303 read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\20\0\0\0\0\0\0"..., 832) = 832 <0.000008>
13:42:35.818340 fstat(4, {st_mode=S_IFREG|0755, st_size=31824, ...}) = 0 <0.000008>
13:42:35.818378 mmap(NULL, 2121984, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x7ff9ceeba000 <0.000010>
13:42:35.818416 mprotect(0x7ff9ceebf000, 2097152, PROT_NONE) = 0 <0.000012>
13:42:35.818454 mmap(0x7ff9cf0bf000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x5000) = 0x7ff9cf0bf000 <0.000010>
13:42:35.818499 close(4) = 0 <0.000008>
13:42:35.818538 open("/usr/lib64/libresolv.so.2", O_RDONLY|O_CLOEXEC) = 4 <0.000011>
13:42:35.818577 read(4, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@9\0\0\0\0\0\0"..., 832) = 832 <0.000009>
13:42:35.818614 fstat(4, {st_mode=S_IFREG|0755, st_size=106848, ...}) = 0 <0.000008>
13:42:35.818652 mmap(NULL, 2198016, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 4, 0) = 0x7ff9ceca1000 <0.000010>
13:42:35.818690 mprotect(0x7ff9cecb7000, 2093056, PROT_NONE) = 0 <0.000011>
13:42:35.818727 mmap(0x7ff9ceeb6000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 4, 0x15000) = 0x7ff9ceeb6000 <0.000011>
13:42:35.818773 mmap(0x7ff9ceeb8000, 6656, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7ff9ceeb8000 <0.000010>
13:42:35.818812 close(4) = 0 <0.000008>
13:42:35.818862 mprotect(0x7ff9ceeb6000, 4096, PROT_READ) = 0 <0.000011>
13:42:35.818953 mprotect(0x7ff9cf0bf000, 4096, PROT_READ) = 0 <0.000010>
13:42:35.818991 munmap(0x7ff9d6418000, 59413) = 0 <0.000013>
13:42:35.819050 socket(PF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 4 <0.000011>
13:42:35.819088 connect(4, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("119.29.29.29")}, 16) = 0 <0.000014>
13:42:35.819142 poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}]) <0.000009>
13:42:35.819184 sendto(4, "\357\235\1\0\0\1\0\0\0\0\0\0\6omsapi\7snstack\2cn\0\0"..., 35, MSG_NOSIGNAL, NULL, 0) = 35 <0.000024>
13:42:35.819238 poll([{fd=4, events=POLLIN}], 1, 5000) = 1 ([{fd=4, revents=POLLIN}]) <0.019979>
13:42:35.839285 ioctl(4, FIONREAD, [108]) = 0 <0.000055>
13:42:35.839388 recvfrom(4, "\357\235\201\200\0\1\0\3\0\0\0\0\6omsapi\7snstack\2cn\0\0"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("119.29.29.29")}, [16]) = 108 <0.000014>
13:42:35.839450 close(4) = 0 <0.000016>
13:42:35.839515 socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4 <0.000012>
13:42:35.839551 connect(4, {sa_family=AF_INET, sin_port=htons(1025), sin_addr=inet_addr("163.177.221.143")}, 16) = 0 <0.000012>
13:42:35.839629 getsockname(4, {sa_family=AF_INET, sin_port=htons(41990), sin_addr=inet_addr("218.107.205.242")}, [16]) = 0 <0.000008>
13:42:35.839667 close(4) = 0 <0.000011>
13:42:35.839707 setsockopt(3, SOL_RAW, ICMP_FILTER, ~(ICMP_ECHOREPLY|ICMP_DEST_UNREACH|ICMP_SOURCE_QUENCH|ICMP_REDIRECT|ICMP_TIME_EXCEEDED|ICMP_PARAMETERPROB), 4) = 0 <0.000008>
13:42:35.839745 setsockopt(3, SOL_IP, IP_RECVERR, [1], 4) = 0 <0.000009>
13:42:35.839786 setsockopt(3, SOL_SOCKET, SO_SNDBUF, [324], 4) = 0 <0.000008>
13:42:35.839825 setsockopt(3, SOL_SOCKET, SO_RCVBUF, [65536], 4) = 0 <0.000008>
13:42:35.839861 getsockopt(3, SOL_SOCKET, SO_RCVBUF, [131072], [4]) = 0 <0.000008>
13:42:35.839906 fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 4), ...}) = 0 <0.000008>
13:42:35.839944 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6426000 <0.000009>
13:42:35.839985 write(1, "PING xxx.com.cdngtm.com ("..., 71PING xxx.com.cdngtm.com (163.177.221.143) 56(84) bytes of data.
) = 71 <0.000016>
13:42:35.840030 setsockopt(3, SOL_SOCKET, SO_TIMESTAMP, [1], 4) = 0 <0.000008>
13:42:35.840066 setsockopt(3, SOL_SOCKET, SO_SNDTIMEO, "\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) = 0 <0.000007>
13:42:35.840102 setsockopt(3, SOL_SOCKET, SO_RCVTIMEO, "\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) = 0 <0.000007>
13:42:35.840137 getpid() = 20102 <0.000007>
13:42:35.840170 rt_sigaction(SIGINT, {0x7ff9d642fbd0, [], SA_RESTORER|SA_INTERRUPT, 0x7ff9d5a382f0}, NULL, 8) = 0 <0.000007>
13:42:35.840214 rt_sigaction(SIGALRM, {0x7ff9d642fbd0, [], SA_RESTORER|SA_INTERRUPT, 0x7ff9d5a382f0}, NULL, 8) = 0 <0.000007>
13:42:35.840252 rt_sigaction(SIGQUIT, {0x7ff9d642fbc0, [], SA_RESTORER|SA_INTERRUPT, 0x7ff9d5a382f0}, NULL, 8) = 0 <0.000008>
13:42:35.840288 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 <0.000007>
13:42:35.840326 ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 <0.000008>
13:42:35.840364 ioctl(1, TIOCGWINSZ, {ws_row=42, ws_col=210, ws_xpixel=0, ws_ypixel=0}) = 0 <0.000007>
13:42:35.840401 sendmsg(3, {msg_name(16)={sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("163.177.221.143")}, msg_iov(1)=[{"\10\0\5\273N\206\0\1K\272\277]\0\0\0\0\315\322\f\0\0\0\0\0\20\21\22\23\24\25\26\27"..., 64}], msg_controllen=0, msg_flags=0}, 0) = 64 <0.000023>
13:42:35.840460 setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={10, 0}}, NULL) = 0 <0.000009>
13:42:35.840500 recvmsg(3, {msg_name(16)={sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("163.177.221.143")}, msg_iov(1)=[{"E\0\0T\315\374\0\0005\1\216\r\243\261\335\217\332k\315\362\0\0\r\273N\206\0\1K\272\277]"..., 192}], msg_controllen=32, {cmsg_len=32, cmsg_level=SOL_SOCKET, cmsg_type=0x1d /* SCM_??? */, ...}, msg_flags=0}, 0) = 84 <0.020365>
13:42:35.860923 stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=72, ...}) = 0 <0.000016>
13:42:35.861009 open("/etc/hosts", O_RDONLY|O_CLOEXEC) = 4 <0.000015>
13:42:35.861060 fstat(4, {st_mode=S_IFREG|0644, st_size=271, ...}) = 0 <0.000011>
13:42:35.861103 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff9d6425000 <0.000011>
13:42:35.861143 read(4, "127.0.0.1 localhost localhost."..., 4096) = 271 <0.000015>
13:42:35.861198 read(4, "", 4096) = 0 <0.000009>
13:42:35.861235 close(4) = 0 <0.000046>
13:42:35.861323 munmap(0x7ff9d6425000, 4096) = 0 <0.000022>
13:42:35.861408 socket(PF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 4 <0.000015>
13:42:35.861466 connect(4, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("119.29.29.29")}, 16) = 0 <0.000019>
13:42:35.861528 poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}]) <0.000010>
13:42:35.861583 sendto(4, "\34\312\1\0\0\1\0\0\0\0\0\0\003143\003221\003177\003163\7in-"..., 46, MSG_NOSIGNAL, NULL, 0) = 46 <0.000021>
13:42:35.861636 poll([{fd=4, events=POLLIN}], 1, 5000) = 0 (Timeout) <5.005176>
13:42:40.866995 socket(PF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_IP) = 5 <0.000133>
13:42:40.867341 connect(5, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("223.5.5.5")}, 16) = 0 <0.000134>
13:42:40.867662 poll([{fd=5, events=POLLOUT}], 1, 0) = 1 ([{fd=5, revents=POLLOUT}]) <0.000198>
13:42:40.868077 sendto(5, "\34\312\1\0\0\1\0\0\0\0\0\0\003143\003221\003177\003163\7in-"..., 46, MSG_NOSIGNAL, NULL, 0) = 46 <0.000100>
13:42:40.868271 poll([{fd=5, events=POLLIN}], 1, 3000) = 1 ([{fd=5, revents=POLLIN}]) <0.018325>
13:42:40.886880 ioctl(5, FIONREAD, [121]) = 0 <0.000097>
13:42:40.887278 recvfrom(5, "\34\312\201\203\0\1\0\0\0\1\0\0\003143\003221\003177\003163\7in-"..., 1024, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("223.5.5.5")}, [16]) = 121 <0.000200>
13:42:40.887805 close(4) = 0 <0.000149>
13:42:40.888173 close(5) = 0 <0.000047>
13:42:40.888424 write(1, "64 bytes from 163.177.221.143: i"..., 6264 bytes from 163.177.221.143: icmp_seq=1 ttl=53 time=20.4 ms
) = 62 <0.000121>
13:42:40.888708 write(1, "\n", 1
) = 1 <0.000045>
13:42:40.888867 write(1, "--- xxx.com.cdngtm.com pi"..., 50--- xxx.com.cdngtm.com ping statistics ---
) = 50 <0.000036>
13:42:40.889016 write(1, "1 packets transmitted, 1 receive"..., 601 packets transmitted, 1 received, 0% packet loss, time 0ms
) = 60 <0.000011>
13:42:40.889073 write(1, "rtt min/avg/max/mdev = 20.426/20"..., 53rtt min/avg/max/mdev = 20.426/20.426/20.426/0.000 ms
) = 53 <0.000008>
13:42:40.889139 exit_group(0) = ?
13:42:40.889364 +++ exited with 0 +++
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