BSON_STRNCPY(3)

💅 BSON_STRNCPY(3) 💅

okay so bestie, welcome to BSON_STRNCPY(3) — it's a libbson page and it's literally about copying strings safely. no cap, this one's a little icon. ✨

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✨ SYNOPSIS ✨

void
bson_strncpy (char *dst, const char *src, size_t size);

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🎀 PARAMETERS 🎀

• dst — the destination buffer. the place stuff gets copied into, the main character of the operation 💖
• src — the src buffer. the source, the origin story, the vibe provider 🌸
• size — the number of bytes to copy into dst, which must be at least that size. so dst has to actually be big enough, no squeezing, we don't do that here 🫶

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🦋 DESCRIPTION 🦋

So what it does: it copies up to size bytes from src into dst. simple. and dst must be at least size bytes in size — that's not a suggestion, that's the whole deal. after all that copying, a trailing \0 is always set. always always. 🎀

it does nothing if size is zero. like, zero work, zero drama, zero bytes. 💀

here's the tea though: bson_strncpy matches the behavior of the C11 standard strncpy_s, rather than strncpy. lowkey important distinction!! this means bson_strncpy always writes a null terminator to dst, even if dst is too short to fit the entire string from src. it's showing up and doing the job no matter what 😭

and if there's additional space left in dst after copying src, bson_strncpy does not fill the remaining space with null characters. nope! it just leaves it. no padding, no filler, no extra nulls. periodt. 💅

bestie don't confuse it with plain strncpy — the whole point is that it always null-terminates, so 👏 keep 👏 that 👏 in 👏 mind 👏

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👑 AUTHOR 👑

MongoDB, Inc — the legends themselves 🫶

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🌈 COPYRIGHT 🌈

2009-present, MongoDB, Inc. — iconic, copyrighted, and thriving since 2009 ⭐

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and that's the whole page, bestie!! 🦋 you're now a bson_strncpy girly fr fr 💜 this was libbson 2.5.6, dated Oct 09, 2026 — catch you on the next manpage, mwah 🎀💖