And adds a \0 after the characters copied, which means you have to remember to do the sizeof(dest)-1 thing to avoid an overwrite.
The people who designed the C string functions should have been made to pee in a cup before they were allowed into the building. So much trouble could have been avoided if they had only been consistent about using memory block sizes as parameters rather than "string" (sic) lengths.
What are you talking about? There is no sizeof(dest) with strndup()--it's newly allocated memory sized appropriately so there's no chance of an overwrite.
While we're on the subject, what is the point of strndup()? Keeping people from running you out of memory with big long strings? They'll just find other ways to do the same thing (by repeatedly feeding you strings of threshold length).
The people who designed the C string functions should have been made to pee in a cup before they were allowed into the building. So much trouble could have been avoided if they had only been consistent about using memory block sizes as parameters rather than "string" (sic) lengths.