$ docker --version
Docker version 1.6.2, build 7c8fca2-dirty

getpeername(3, {sa_family=AF_LOCAL, sun_path="/var/run/docker.sock"}, [23]) = 0
read(3, 0xc208017000, 4096)             = -1 EAGAIN (Resource temporarily unavailable)
write(3, "GET /v1.18/info HTTP/1.1rnHost: "..., 89) = 89
epoll_wait(4, {{EPOLLOUT, {u32=3674064336, u64=140255831115216}}}, 128, 0) = 1
epoll_wait(4,

getpeername(3, {sa_family=AF_LOCAL, sun_path="/var/run/docker.sock"}, [23]) = 0
read(3, 0xc208017000, 4096)             = -1 EAGAIN (Resource temporarily unavailable)
write(3, "GET /v1.18/info HTTP/1.1rnHost: "..., 89) = 89
epoll_wait(4, {{EPOLLOUT, {u32=3674064336, u64=140255831115216}}}, 128, 0) = 1
epoll_wait(4, 7ffc9bc3a170, 128, -1)    = -1 EINTR (Interrupted system call)
--- SIGINT {si_signo=SIGINT, si_code=SI_KERNEL} ---
exit_group(2)
+++ exited with 2 +++

int epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout);