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"""When called as a script, print a comma-separated list of the open
file descriptors on stdout.
Usage:
fd_stats.py: check all file descriptors
fd_status.py fd1 fd2 ...: check only specified file descriptors
"""
import errno
import os
import stat
import sys
if __name__ == "__main__":
fds = []
if len(sys.argv) == 1:
try:
_MAXFD = os.sysconf("SC_OPEN_MAX")
except:
_MAXFD = 256
test_fds = range(0, _MAXFD)
else:
test_fds = map(int, sys.argv[1:])
for fd in test_fds:
try:
st = os.fstat(fd)
except OSError as e:
if e.errno == errno.EBADF:
continue
raise
# Ignore Solaris door files
if not stat.S_ISDOOR(st.st_mode):
fds.append(fd)
print(','.join(map(str, fds)))