Article:  |
/dev/hello_world: A Simple Introduction to Device Drivers under Linux | |
| Subject: | Small problem in hello_proc.c? | |
| Date: | 2007-07-08 11:47:27 | |
| From: | valhenson | |
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Response to: Small problem in hello_proc.c?
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Yes, you are correct that we are copying one more byte to the buffer than we are testing for. Thanks for catching the bug! In practice, this isn't a problem because the kernel always allocates a full page to pass to the /proc read function. The solution isn't to test for a larger buffer, though - we don't want to copy the null terminating byte to userspace. Instead, we'll use strncpy to avoid copying the terminating byte.
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