STRCHR
Section: Linux Programmer's Manual (3)
Updated: 2008-08-11
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NAME
strchr, strrchr, strchrnul - locate character in string
SYNOPSIS
#include <string.h>
char *strchr(const char *s, int c);
char *strrchr(const char *s, int c);
#define _GNU_SOURCE
#include <string.h>
char *strchrnul(const char *s, int c);
DESCRIPTION
The
strchr()
function returns a pointer to the first occurrence
of the character c in the string s.
The
strrchr()
function returns a pointer to the last occurrence
of the character c in the string s.
The
strchrnul()
function is like
strchr()
except that if c is not found in s,
then it returns a pointer to the null byte
at the end of s, rather than NULL.
Here "character" means "byte"; these functions do not work with
wide or multi-byte characters.
RETURN VALUE
The
strchr()
and
strrchr()
functions return a pointer to
the matched character or NULL if the character is not found.
The
strchrnul()
function returns a pointer to
the matched character,
or a pointer to the null
byte at the end of s (i.e., s+strlen(s))
if the character is not found.
VERSIONS
strchrnul()
first appeared in glibc in version 2.1.1.
CONFORMING TO
strchr()
and
strrchr()
are in SVr4, 4.3BSD, C89, C99.
strchrnul()
is a GNU extension.
SEE ALSO
index(3),
memchr(3),
rindex(3),
strlen(3),
strpbrk(3),
strsep(3),
strspn(3),
strstr(3),
strtok(3),
wcschr(3),
wcsrchr(3),
feature_test_macros(7)
COLOPHON
This page is part of release 3.22 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.