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Old 02-03-2005, 11:20 PM   #1
Bluesuperman
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Registered: Nov 2002
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Validate input and preventing buffur overflows


Hello,

I am writing a C++ app and the user is required to pass command line arguments. Lets for example say the user must pass there name and age by "--name=michael --age=99".

How do I go about validating the input and preventing the buffer overflows ?

Would I ...

1. Simple check the variable argv[i] lenght to make sure it is under 50 characters for example ?

2. How would I strip out any non-alphanumeric characters ?

I have tried googling and search ... but have not found anything

Michael.
 
Old 02-04-2005, 01:55 AM   #2
CroMagnon
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You might like to try getopt instead of parsing it yourself (man 3 getopt).
 
  


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