Man page - strchr(3)

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Manual

strchr

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
STANDARDS
HISTORY
SEE ALSO

NAME

strchr, strrchr, strchrnul - locate character in string

LIBRARY

Standard C library ( libc , -lc )

SYNOPSIS

#include <string.h>

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

#define _GNU_SOURCE /* See feature_test_macros(7) */
#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 multibyte characters.

RETURN VALUE

The strchr () and strrchr () functions return a pointer to the matched character or NULL if the character is not found. The terminating null byte is considered part of the string, so that if c is specified as '\0', these functions return a pointer to the terminator.

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.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes (7).

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STANDARDS

strchr ()
strrchr ()

C11, POSIX.1-2008.

strchrnul ()

GNU.

HISTORY

strchr ()
strrchr ()

POSIX.1-2001, C89, SVr4, 4.3BSD.

strchrnul ()

glibc 2.1.1, FreeBSD 10, NetBSD 8.

SEE ALSO

memchr (3), string (3), strlen (3), strpbrk (3), strsep (3), strspn (3), strstr (3), strtok (3), wcschr (3), wcsrchr (3)