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).

       ┌───────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │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.

SEE ALSO

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