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Name	Size	Perms	Modified	Actions
[ .. / .. ]
__pycache__	-	drwxr-xr-x	2022-02-22 15:51:21	Del
fd_status.py	835 B	-rw-r--r--	2022-02-22 15:51:02	Edit Del
input_reader.py	130 B	-rw-r--r--	2022-02-22 15:51:02	Edit Del
qcat.py	159 B	-rw-r--r--	2022-02-22 15:51:02	Edit Del
qgrep.py	253 B	-rw-r--r--	2022-02-22 15:51:02	Edit Del
sigchild_ignore.py	757 B	-rw-r--r--	2022-02-22 15:51:02	Edit Del

Editing: fd_status.py (835 B)

"""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)))