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Asked: 2026-05-27T01:02:15+00:00

On which factors do I have to pay attention when copying strings in C?

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On which factors do I have to pay attention when copying strings in C? And what can go wrong?

I can think of I need to reserve sufficient memory before copying a string and have to make sure I have enough privileges to write to the memory (try to avoid General Protection Faults), but is there anything else I have to pay attention on when copying strings? Are there any additional potential errors?

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  1. Editorial Team
    • Make sure that you have sufficient buffer space in the destination (i.e. know ahead how many bytes you’re copying). This also means making sure that the source string is properly terminated (by a null character, i.e. 0 = '\0').
    • Make sure that the destination string gets properly terminated.
    • If your application is character-set aware, bear in mind that some character sets can have embedded null characters, while some can have variable-length characters.
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