1  """When called as a script, print a comma-separated list of the open
       2  file descriptors on stdout.
       3  
       4  Usage:
       5  fd_stats.py: check all file descriptors
       6  fd_status.py fd1 fd2 ...: check only specified file descriptors
       7  """
       8  
       9  import errno
      10  import os
      11  import stat
      12  import sys
      13  
      14  if __name__ == "__main__":
      15      fds = []
      16      if len(sys.argv) == 1:
      17          try:
      18              _MAXFD = os.sysconf("SC_OPEN_MAX")
      19          except:
      20              _MAXFD = 256
      21          test_fds = range(0, _MAXFD)
      22      else:
      23          test_fds = map(int, sys.argv[1:])
      24      for fd in test_fds:
      25          try:
      26              st = os.fstat(fd)
      27          except OSError as e:
      28              if e.errno == errno.EBADF:
      29                  continue
      30              raise
      31          # Ignore Solaris door files
      32          if not stat.S_ISDOOR(st.st_mode):
      33              fds.append(fd)
      34      print(','.join(map(str, fds)))