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 4.15 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/.