- Why are strlcpy and strlcat considered insecure?
The strlcpy and strlcat API properly check the target buffer’s bounds, nul-terminate in all cases and return the length of the source string, allowing detection of truncation This API has been adopted by most modern operating systems and many standalone software packages, including OpenBSD (where it originated), Sun Solaris, FreeBSD, NetBSD
- strings - C strlcat implementation - Code Review Stack Exchange
Using FreeBSD strlcat as a guide "length" with C strings typical does not include the null character "size" usually does include the null character
- string - Recreating strlcat function in C invalid operands to binary . . .
strlcat concatenates both strings taking the maximum size of the dst buffer as the third argument (size
- strcat Vs strncat - When should which function be used?
Instead, use strncat() or strlcat() and ensure that no more characters are copied to the destination buffer than it can hold Note that strncat() can also be problematic It may be a security concern for a string to be truncated at all
- c - What is the purpose of strlcpy and what was in the first version of . . .
It defeats the purpose of strlcpy() and strlcat(), as a pair When used together for this purpose, every call to either strlcpy() or strlcat() would be passed a pointer to the overall start of the destination buffer, and the full size of the buffer This relieves the programmer of the need to track and use information about the current length
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