title: Why STRACE shows EAGAIN (Resource temporarily unavailable)
body: <p>Following is the sequence I am getting</p>
  
  <pre><code>socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 7
  
      setsockopt(7, SOL_TCP, TCP_NODELAY, [1], 4) = 0
      setsockopt(7, SOL_SOCKET, SO_SNDBUF, [32120], 4) = 0
      getsockopt(7, SOL_SOCKET, SO_SNDBUF, [30064835312], [4]) = 0
      setsockopt(7, SOL_SOCKET, SO_SNDBUF, [64240], 4) = 0
      getsockopt(7, SOL_SOCKET, SO_SNDBUF, [30064899552], [4]) = 0
      stat("/etc/localtime", {st_dev=makedev(8, 1), st_ino=229001, st_mode=S_IFREG|0644, st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=265, st_atime=2013/07/15-06:30:03, st_mtime=2012/06/25-23:46:43, st_ctime=2012/06/25-23:46:43}) = 0
      write(1, "[info 2013/07/16 05:53:24.622210"..., 114) = 114
      setsockopt(7, SOL_SOCKET, SO_RCVBUF, [32120], 4) = 0
      getsockopt(7, SOL_SOCKET, SO_RCVBUF, [30064835312], [4]) = 0
      setsockopt(7, SOL_SOCKET, SO_RCVBUF, [64240], 4) = 0
      getsockopt(7, SOL_SOCKET, SO_RCVBUF, [30064899552], [4]) = 0
      fcntl(7, F_GETFL)                       = 0x2 (flags O_RDWR)
      fcntl(7, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
      rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x33b3632920}, {SIG_DFL, [], 0}, 8) = 0
      fcntl(7, F_GETFL)                       = 0x802 (flags O_RDWR|O_NONBLOCK)
      fcntl(7, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
      connect(7, {sa_family=AF_INET, sin_port=htons(50505), sin_addr=inet_addr("1.2.3.4")}, 16) = -1 EINPROGRESS (Operation now in progress)
      poll([{fd=7, events=POLLIN|POLLOUT}], 1, 59000) = 1 ([{fd=7, revents=POLLOUT}])
      fcntl(7, F_GETFL)                       = 0x802 (flags O_RDWR|O_NONBLOCK)
      fcntl(7, F_SETFL, O_RDWR)               = 0
      getsockname(7, {sa_family=AF_INET, sin_port=htons(33220), sin_addr=inet_addr("10.112.204.215")}, [16]) = 0
      fcntl(7, F_GETFL)                       = 0x2 (flags O_RDWR)
      fcntl(7, F_GETFL)                       = 0x2 (flags O_RDWR)
      fcntl(7, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
      write(7, "d\23;\177\377\330\357\1&amp;W\1\\\4\np\314\327\0\0\0\2W\0\rpnq-gst-"..., 103) = 103
      fcntl(7, F_GETFL)                       = 0x802 (flags O_RDWR|O_NONBLOCK)
      fcntl(7, F_SETFL, O_RDWR)               = 0
      fcntl(7, F_GETFL)                       = 0x2 (flags O_RDWR)
      fcntl(7, F_GETFL)                       = 0x2 (flags O_RDWR)
      fcntl(7, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
      read(7, 0x9d9f90, 1)                    = -1 EAGAIN (Resource temporarily unavailable)
  </code></pre>
  
  <p>Why this read is getting called, I assume that <code>poll</code> should wake up only when there is data to read</p>