GNU
2019-03-06
Aliases: strchrnul(3), strchrnul(3), strchrnul(3), strchrnul(3), strchrnul(3), strchrnul(3), strchrnul(3), strchrnul(3), strchrnul(3), strchrnul(3), strrchr(3), strrchr(3), strrchr(3), strrchr(3), strrchr(3), strrchr(3), strrchr(3), strrchr(3), strrchr(3), strrchr(3), strrchr(3), strrchr(3)
manpages-dev
Manual pages about using GNU/Linux for development
man-pages
Linux kernel and C library user-space interface documentation
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 /* 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 \(aq\0\(aq, 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.
VERSIONS
strchrnul() first appeared in glibc in version 2.1.1.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| Thread safety | MT-Safe |
CONFORMING TO
strchr(), strrchr(): POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
strchrnul() is a GNU extension.
