strlcpy
strlcpy is a C library function designed for safe string copying, developed as part of the OpenBSD project. It copies a null-terminated source string to a destination buffer while ensuring the destination is always null-terminated and preventing buffer overflows by truncating if necessary. It returns the length of the source string, allowing easy detection of truncation.
Developers should use strlcpy when writing C code that requires robust and secure string handling, particularly in systems programming, embedded systems, or security-critical applications where buffer overflows are a major concern. It is especially useful in scenarios like processing user input, file paths, or network data where string lengths are unpredictable, as it provides a safer alternative to standard functions like strcpy or strncpy.