execve("/sbin/ip", ["ip", "netns", "add", "file"], 0x7ffef61f6888 /* 25 vars */) = 0
brk(NULL)                               = 0x55c6bb4ce000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=39833, ...}) = 0
mmap(NULL, 39833, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f68c421b000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/x86_64-linux-gnu/libelf.so.1", O_RDONLY|O_CLOEXEC) = 3
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
fstat(3, {st_mode=S_IFREG|0644, st_size=104952, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f68c4219000
mmap(NULL, 2199936, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f68c3de4000
mprotect(0x7f68c3dfd000, 2093056, PROT_NONE) = 0
mmap(0x7f68c3ffc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18000) = 0x7f68c3ffc000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libmnl.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@\31\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=22520, ...}) = 0
mmap(NULL, 2117648, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f68c3bde000
mprotect(0x7f68c3be3000, 2093056, PROT_NONE) = 0
mmap(0x7f68c3de2000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4000) = 0x7f68c3de2000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14560, ...}) = 0
mmap(NULL, 2109712, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f68c39da000
mprotect(0x7f68c39dd000, 2093056, PROT_NONE) = 0
mmap(0x7f68c3bdc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f68c3bdc000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\34\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2030544, ...}) = 0
mmap(NULL, 4131552, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f68c35e9000
mprotect(0x7f68c37d0000, 2097152, PROT_NONE) = 0
mmap(0x7f68c39d0000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7f68c39d0000
mmap(0x7f68c39d6000, 15072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f68c39d6000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\220\37\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=116960, ...}) = 0
mmap(NULL, 2212016, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f68c33cc000
mprotect(0x7f68c33e8000, 2093056, PROT_NONE) = 0
mmap(0x7f68c35e7000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b000) = 0x7f68c35e7000
close(3)                                = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f68c4217000
arch_prctl(ARCH_SET_FS, 0x7f68c42180c0) = 0
mprotect(0x7f68c39d0000, 16384, PROT_READ) = 0
mprotect(0x7f68c35e7000, 4096, PROT_READ) = 0
mprotect(0x7f68c3bdc000, 4096, PROT_READ) = 0
mprotect(0x7f68c3de2000, 4096, PROT_READ) = 0
mprotect(0x7f68c3ffc000, 4096, PROT_READ) = 0
mprotect(0x55c6ba431000, 8192, PROT_READ) = 0
mprotect(0x7f68c4225000, 4096, PROT_READ) = 0
munmap(0x7f68c421b000, 39833)           = 0
socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE) = 3
setsockopt(3, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(3, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
setsockopt(3, SOL_NETLINK, NETLINK_EXT_ACK, [1], 4) = 0
bind(3, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 0
getsockname(3, {sa_family=AF_NETLINK, nl_pid=22047, nl_groups=00000000}, [12]) = 0
openat(AT_FDCWD, "/proc/self/ns/net", O_RDONLY) = 4
sendto(3, {{len=28, type=RTM_GETNSID, flags=NLM_F_REQUEST, seq=0, pid=0}, {rtgen_family=AF_UNSPEC}, {{nla_len=8, nla_type=NETNSA_FD}, 4}}, 28, 0, NULL, 0) = 28
recvmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base={{len=28, type=RTM_NEWNSID, flags=0, seq=0, pid=22047}, {rtgen_family=AF_UNSPEC}, {{nla_len=8, nla_type=NETNSA_NSID}, -1}}, iov_len=16384}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 28
close(4)                                = 0
socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC, NETLINK_ROUTE) = 4
setsockopt(4, SOL_SOCKET, SO_SNDBUF, [32768], 4) = 0
setsockopt(4, SOL_SOCKET, SO_RCVBUF, [1048576], 4) = 0
setsockopt(4, SOL_NETLINK, NETLINK_EXT_ACK, [1], 4) = 0
bind(4, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 0
getsockname(4, {sa_family=AF_NETLINK, nl_pid=-264843706, nl_groups=00000000}, [12]) = 0
mkdir("/var/run/netns", 0755)           = -1 EEXIST (File exists)
mount("", "/var/run/netns", 0x55c6ba2179a5, MS_REC|MS_SHARED, NULL) = 0
openat(AT_FDCWD, "/var/run/netns/file", O_RDONLY|O_CREAT|O_EXCL, 000) = 5
close(5)                                = 0
unshare(CLONE_NEWNET