Creates a memory dump of a running nginx. Usefull for getting lost config files from a running machine.

nginx_dump.sh

# Get the process id of nginx
NGINX_PID=$(pgrep -o 'nginx')
echo Nginx server PID: $NGINX_PID

# Get the memory parts that are used by nginx. 
# That make gdb dump commands with it and dump the corresponding memory into files
cat /proc/$NGINX_PID/maps \
    | awk '
      $6 !~ "^/" {split ($1,address,"-");
      print "dump memory mem_" address[1] " 0x" address[1] " 0x" address[2] ;}
      END{print "quit"}' \
    | tee /tmp/gdb_cmds

# Run gdb to dump the memory
gdb -p $NGINX_PID -x /tmp/gdb_cmds