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.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).
       ┌──────────────────────────────────┬───────────────┬─────────┐
       │ Interface                        │ Attribute     │ Value   │
       ├──────────────────────────────────┼───────────────┼─────────┤
       │ strchr(), strrchr(), strchrnul() │ Thread safety │ MT-Safe │
       └──────────────────────────────────┴───────────────┴─────────┘

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  5.10  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
       https://www.kernel.org/doc/man-pages/.

GNU                                                2019-03-06                                          STRCHR(3)