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Pass arguments to bash script

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# 8  
Old 07-16-2013
Self-modifying code isn't a good idea in general because:
  1. It is harder to maintain. (In your case you're trying to modify lines 1-9 in your shell script. If someone adds a couple of more lines to your script [such as a comment saying what the script does]; the modification no longer works.)
  2. If the size of the file being executed changes while it is running (which is true with what you were doing) and the size of the file is more than one buffer full when when the interpreter reads in the program, the interpreter may skip some characters in the script or read multiple copies of some characters in the script.
  3. If something goes wrong while updating the script (e.g., running out of space), you may end up with a program that only has half of your changes (leaving you with no obvious way to get back to where you were before you started making changes nor to get to where you wanted to end up).
  4. If you have to restore a back-up copy of your script, will it do what you want?
This User Gave Thanks to Don Cragun For This Post:
SkySmart
# 9  
Old 07-16-2013
5. If you look at your script 1 month from now, you will have no idea why you're doing what you're doing.
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