03-27-2019
Quote:
Originally Posted by
Don Cragun
Absolutely nothing that you are doing in the script you have shown us in this thread will tell you anything about whether or not Firefox is downloading a file unless it happens to be downloading a single file named /home/andy/Downloads/myfile.iso unless there is something going on behind the scenes such that the command xdotool getactivewindow key Ctrl has the side effect of causing /home/andy/Downloads/myfile.iso to change size if Firefox is downloading a file.
Does running the command xdotool getactivewindow key Ctrl cause the size of /home/andy/Downloads/myfile.iso to change?
Note that MadeInGermany is correct about du -s reporting file sizes as a number of blocks (512-byte blocks if the version of du on your version of Ubuntu adheres to the standards; but quite likely on most versions of Linux systems you'll get counts of a larger sized block). If you want to detect small increments of change, please do not use wc -c pathname as suggested by apmcd47; that will increase the CPU an IO load on your system significantly if you are downloading a large file. Using ls -n pathname would be a much better choice. It will report changes in file size to the number of bytes in the file and only has to do a stat() on the file to get its size; using wc -c pathname is usually implemented by wc opening, reading, and counting every byte in pathname. (Note that ls -n output is like ls -l output except it prints the file owner's user ID and file group's group ID instead of looking up and printing the file owner's user name and file group's group name; therefore, it is slightly faster and uses fewer system resources to get the job done. If you were using a UNIX system instead of a Linux system, I'd suggest using ls -og which avoids printing user and group names or IDs completely.)
Running xdotool getactivewindow key Ctrl does not do anything.
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