/ # strace hcitool -i hci0 lescan
execve("/bin/hcitool", ["hcitool", "-i", "hci0", "lescan"], [/* 7 vars */]) = 0
brk(NULL)                               = 0x2d000
uname({sysname="Linux", nodename="PowerBeacon", ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40058000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=3956, ...}) = 0
mmap2(NULL, 3956, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40124000
close(3)                                = 0
open("/lib/libgcc_s.so.1", O_RDONLY)    = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0p'\0\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=45560, ...}) = 0
mmap2(NULL, 77036, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x40171000
mprotect(0x4017c000, 28672, PROT_NONE)  = 0
mmap2(0x40183000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xa000) = 0x40183000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0HW\1\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1299692, ...}) = 0
mmap2(NULL, 1336564, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x40184000
mprotect(0x402bd000, 32768, PROT_NONE)  = 0
mmap2(0x402c5000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x139000) = 0x402c5000
mmap2(0x402c8000, 9460, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x402c8000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40063000
set_tls(0x400636d0, 0x40063da8, 0x400d3050, 0x400636d0, 0x400d3050) = 0
mprotect(0x402c5000, 8192, PROT_READ)   = 0
mprotect(0x400d2000, 4096, PROT_READ)   = 0
munmap(0x40124000, 3956)                = 0
socket(PF_BLUETOOTH, SOCK_RAW|SOCK_CLOEXEC, 1) = 3
ioctl(3, HCIGETDEVINFO, 0xbe93dc74)     = 0
close(3)                                = 0
socket(PF_BLUETOOTH, SOCK_RAW|SOCK_CLOEXEC, 1) = 3
ioctl(3, HCIGETDEVINFO, 0xbe93dc94)     = 0
close(3)                                = 0
socket(PF_BLUETOOTH, SOCK_RAW|SOCK_CLOEXEC, 1) = 3
bind(3, {sa_family=AF_BLUETOOTH, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 6) = 0
getsockopt(3, SOL_IP, IP_TTL, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\206\337", [16]) = 0
setsockopt(3, SOL_IP, IP_TTL, "\20\0\0\0\1\300\0\0\0\0\0@\v \0\0", 16) = 0
writev(3, [{"\1", 1}, {"\v \7", 3}, {"\1\20\0\20\0\0\0", 7}], 3) = 11
poll([{fd=3, events=POLLIN}], 1, 10000) = 1 ([{fd=3, revents=POLLIN}])
read(3, "\4\16\4\1\v \0", 260)          = 7
setsockopt(3, SOL_IP, IP_TTL, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\206\337", 16) = 0
getsockopt(3, SOL_IP, IP_TTL, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\206\337", [16]) = 0
setsockopt(3, SOL_IP, IP_TTL, "\20\0\0\0\1\300\0\0\0\0\0@\f \0\0", 16) = 0
writev(3, [{"\1", 1}, {"\f \2", 3}, {"\1\1", 2}], 3) = 6
poll([{fd=3, events=POLLIN}], 1, 10000) = 1 ([{fd=3, revents=POLLIN}])
read(3, "\4\16\4\1\f \0", 260)          = 7
setsockopt(3, SOL_IP, IP_TTL, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\206\337", 16) = 0
fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(5, 1), ...}) = 0
ioctl(1, TCGETS, {B115200 opost isig icanon echo ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40104000
write(1, "LE Scan ...\n", 12LE Scan ...
)           = 12
getsockopt(3, SOL_IP, IP_TTL, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\206\337", [16]) = 0
setsockopt(3, SOL_IP, IP_TTL, "\20\0\0\0\0\0\0\0\0\0\0@\0\0\0\0", 16) = 0
rt_sigaction(SIGINT, {0xe850, [], SA_RESTORER|SA_NOCLDSTOP, 0x401b1a90}, NULL, 8) = 0
read(3,