STRCHR(3)                              Linux Programmer's Manual                              STRCHR(3)

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 '\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.

VERSIONS
       strchrnul() first appeared in glibc in version 2.1.1.

CONFORMING TO
       strchr(), strrchr(): POSIX.1-2001, POSIX.1-2008, C89, C99,
       SVr4, 4.3BSD.

       strchrnul() is a GNU extension.

SEE ALSO
       index(3), memchr(3), rindex(3), string(3), strlen(3),
       strpbrk(3), strsep(3), strspn(3), strstr(3), strtok(3),
       wcschr(3), wcsrchr(3)

COLOPHON
       This page is part of release 4.04 of the Linux man-pages
       project.  A description of the project, information about
       reporting bugs, and the latest version of this page, can be
       found at http://www.kernel.org/doc/man-pages/.

GNU                                            2015-08-08                                     STRCHR(3)