STRRCHR(3POSIX)

💖 STRRCHR — the POSIX Programmer's Manual, bestie edition 💖

okay so real quick, this page lives in the POSIX Programmer's Manual (the whole STRRCHR(3POSIX) situation). Before we even get into it:

🚨 PROLOG 🚨

This manual page is part of the POSIX Programmer's Manual. Heads up though — the Linux implementation of this interface may differ (so like, go check the corresponding Linux manual page for the deets on Linux behavior, fr), or honestly the interface might not even be implemented on Linux at all. 🙈

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✨ NAME ✨

strrchr — string scanning operation 🦋

🌸 SYNOPSIS 🌸

#include <string.h>

char *strrchr(const char *s, int c);

💅 DESCRIPTION 💅

So the functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional — not a vibe we're going for. This volume of POSIX.1‐2017 defers to the ISO C standard. periodt.

Now the actual tea ☕: the strrchr() function shall locate the last occurrence of c (converted to a char) in the string pointed to by s. And yes, the terminating NUL character is considered to be part of the string. iconic behavior honestly.

🫶 RETURN VALUE 🫶

Upon successful completion, strrchr() shall return a pointer to the byte, or a null pointer if c does not occur in the string. no cap.

💀 ERRORS 💀

No errors are defined. literally none. not a single one.

The following sections are informative. (iykyk — they're the bonus content ✨)

🎀 EXAMPLES 🎀

Finding the Base Name of a File 🔥

The following example uses strrchr() to get a pointer to the base name of a file. The strrchr() function searches backwards through the name of the file to find the last '/' character in name. This pointer (plus one) will point to the base name of the file. main character energy fr fr.

#include <string.h>
...
const char *name;
char *basename;
...
basename = strrchr(name, '/') + 1;
...

🌈 APPLICATION USAGE 🌈

None. (yes bestie, that's the whole section, she's empty but she's valid 🫶)

🧚 RATIONALE 🧚

None. (same energy, also empty, also valid 💜)

⭐ FUTURE DIRECTIONS ⭐

None. (nothing on the horizon, we're chilling)

👑 SEE ALSO 👑

• strchr()

The Base Definitions volume of POSIX.1‐2017, <string.h> — go read those too, they're giving essential context.

💖 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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okay that's the whole page bestie, you ate that reading session 💅✨ and for the record, this lil masterpiece came to you courtesy of IEEE/The Open Group, 2017, filed under STRRCHR(3POSIX). slay, go write some string-scanning code, ily 🎀🦋