strchr

(3)

locate character in string

Library functionsmanpages-dev 6.9.1-1also documents strrchr, strchrnul

#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);

LIBRARY

Standard C library (libc, -lc)

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).

Interface	Attribute	Value
strchr (), strrchr (), strchrnul ()	Thread safety	MT-Safe

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.