MEMMOVE(3P)

💖 MEMMOVE(3P) 💖

okay bestie, so this is a page from the POSIX Programmer's Manual (yes, that whole family, MEMMOVE(3P) energy), and we're about to get so into it. 🫶

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✨ PROLOG ✨

Heads up, babe: this manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (so like, go check the corresponding Linux manual page for the actual Linux behavior), or honestly the interface may not be implemented on Linux at all. vibe check your platform first, fr fr. 💀

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🌸 NAME 🌸

memmove — copy bytes in memory with overlapping areas

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🎀 SYNOPSIS 🎀

#include <string.h>

void *memmove(void *s1, const void *s2, size_t n);

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🦋 DESCRIPTION 🦋

So the functionality described on this reference page is aligned with the ISO C standard. If anything here conflicts with the ISO C standard, that conflict is unintentional — no drama intended, periodt. This volume of POSIX.1‐2017 defers to the ISO C standard. 👑

The memmove() function shall copy n bytes from the object pointed to by s2 into the object pointed to by s1. 💅

And here's the iconic part, the reason she's famous: copying takes place as if the n bytes from the object pointed to by s2 are first copied into a temporary array of n bytes that does not overlap the objects pointed to by s1 and s2, and then the n bytes from that temporary array are copied into the object pointed to by s1. It's giving "middleman but make it safe". ✨

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⭐ RETURN VALUE ⭐

The memmove() function shall return s1. That's it, that's the whole return value.

No return value is reserved to indicate an error. So like, don't go looking for one, bestie, she's not giving you a signal. 🙈

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💜 ERRORS 💜

No errors are defined.

The following sections are informative. (iykyk) 👑

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🌈 EXAMPLES 🌈

None.

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🍓 APPLICATION USAGE 🍓

None.

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🧚 RATIONALE 🧚

None.

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🔥 FUTURE DIRECTIONS 🔥

None.

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💖 SEE ALSO 💖

• The Base Definitions volume of POSIX.1‐2017, <string.h>

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👑 COPYRIGHT 👑

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group.

In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

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and that's the whole page, bestie — brought to you by IEEE/The Open Group, dated 2017, page MEMMOVE(3P). slay, go copy some overlapping bytes responsibly 💅✨