MEMCHR(3P)

✨ MEMCHR(3P) — the POSIX Programmer's Manual era 💖

okay bestie, so this one lives in the POSIX Programmer's Manual, and she's giving "find byte in memory" energy. quick heads up before we dive in, because this matters:

🌸 PROLOG 🌸

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 deets on Linux behavior), or honestly the interface may not be implemented on Linux at all. no cap. 🫶

---

🎀 NAME 🎀

memchr — find byte in memory

the way she just finds a byte in memory... iconic behavior fr fr 💅

---

✨ SYNOPSIS ✨

#include <string.h>

void *memchr(const void *s, int c, size_t n);

---

💖 DESCRIPTION 💖

So the functionality described on this reference page is aligned with the ISO C standard. And if there's ever any conflict between the requirements described here and the ISO C standard, that's unintentional — this volume of POSIX.1‐2017 defers to the ISO C standard. periodt. 👑

The memchr() function shall locate the first occurrence of c (converted to an unsigned char) in the initial n bytes (each interpreted as unsigned char) pointed to by s. like she's scanning, she's looking, she's finding. 🔍

Implementations shall behave as if they read the memory byte by byte from the beginning of the bytes pointed to by s and stop at the first occurrence of c (if it is found in the initial n bytes). no skipping ahead, no peeking, she's doing it in order, bestie. 💫

---

🦋 RETURN VALUE 🦋

The memchr() function shall return a pointer to the located byte — or a null pointer if the byte is not found. 😭 (sad but valid)

---

🔥 ERRORS 🔥

No errors are defined.

The following sections are informative. (iykyk)

---

🌈 EXAMPLES 🌈

None.

---

💜 APPLICATION USAGE 💜

None.

---

🧚 RATIONALE 🧚

None.

---

⭐ FUTURE DIRECTIONS ⭐

None.

---

👑 SEE ALSO 👑

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

---

🌸 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 .

---

bestie that's the whole page, every last byte of it, no skips, no shortcuts, we ate and left no crumbs 💅🍓

okay that's a wrap — this was IEEE/The Open Group, 2017, and the page is MEMCHR(3P). stay iconic, go find your bytes, love u 💖✨