memtostr(9)

💖 NAME 💖

okay so bestie, welcome to memtostr(9) from the Kernel API Manual 💖. The vibe is literally: Copy a possibly non-NUL-term string to a NUL-term string. That's the whole name, no cap.

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✨ SYNOPSIS ✨

Here's the call exactly as it shows up, character for character:

memtostr (dest , src );

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🎀 ARGUMENTS 🎀

• dest — pointer to destination NUL-terminates string 😭 that's the original wording, bestie, I'm just the messenger.
• src — pointer to character array, and it's likely marked as __nonstring 🫶.

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🦋 DESCRIPTION 🦋

So this is a replacement for strncpy uses where the source is not a NUL-terminated string. Slay ✨.

And here's the big caveat, pay attention: the sizes of dest and src must be known at compile-time. Must. Not maybe. Not "whenever you feel like it." Compile-time. 💅

Lowkey important, bestie: don't forget that compile-time size requirement, fr fr.

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🌈 SEE ALSO 🌈

Kernel file ./include/linux/string.h is the spot, and the whole friend group is:

• memdup_array_user(9)
• vmemdup_array_user(9)
• strscpy(9)
• strscpy_pad(9)
• mem_is_zero(9)
• sysfs_match_string(9)
• memzero_explicit(9)
• kbasename(9)
• strtomem_pad(9)
• strtomem(9)
• memtostr_pad(9)
• memset_after(9)
• memset_startat(9)
• str_has_prefix(9)
• strstarts(9)
• strends(9)

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That's the whole page, bestie. Source/version: ./include/linux; date: October 2026; manual page: memtostr(9). Periodt. 🎀💜