# Closing a process file descriptor while is running

# ls -l /proc/26133/fd
0 -> /dev/pts/1
1 -> /dev/pts/1
2 -> /dev/pts/1
3 -> socket:[21652774]
4 -> socket:[21652775]
5 -> socket:[21652776]
6 -> socket:[21652777]
7 -> /daft_punk-ram-get_lucky.mp3
# lsof -n -i 4 -a -p 26133
COMMAND   PID FD   TYPE   DEVICE SIZE/OFF NODE NAME
vlc     26133  3u  IPv4 21652774      0t0  UDP 192.168.1.1:46833->192.168.1.2:2001
vlc     26133  4u  IPv4 21652775      0t0  UDP 192.168.1.1:46834->192.168.1.2:2002
vlc     26133  5u  IPv4 21652776      0t0  UDP 192.168.1.1:48852->192.168.1.3:2001
vlc     26133  6u  IPv4 21652777      0t0  UDP 192.168.1.1:48853->192.168.1.3:2002
# echo -e "call close(3)\nquit" > gdb_commands
# gdb -p 26133 --batch -x gdb_commands