Section: POSIX Programmer's Manual (3P)
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
--- string scanning operation
char *strrchr(const char *s, int c);
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. This volume of POSIX.1-2017 defers to the ISO C standard.
function shall locate the last occurrence of
(converted to a
in the string pointed to by
The terminating NUL character is considered to be part of the string.
Upon successful completion,
shall return a pointer to the byte or a null pointer if
does not occur in the string.
No errors are defined.
The following sections are informative.
Finding the Base Name of a File
The following example uses
to get a pointer to the base name of a file. The
function searches backwards through the name of the file to find the
This pointer (plus one) will point to the base name of the file.
const char *name;
basename = strrchr(name, '/') + 1;
The Base Definitions volume of POSIX.1-2017,
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
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